Richard Duivenvoorde wrote:
Paolo Cavallini wrote:
Il 28/06/2010 23:44, Richard Duivenvoorde ha scritto:
I can confirm the bug. It is not a typical postgis layer bug. It's the
fact that the layers have the same (display)name in qgis, which are then
used to store and retrieve them from a dictionary.
Besides this being a bug, it's also wrong because WMS-layers should have
unique names anyway.
I also found a few other minor problems:
- for lines, it takes the color from the fill, not from the outline,
so the results
are different from what expected
- if one wants to show only the outline of a polygon, the COLOR for
interior
shouldn't be written to the mapfile
- for the buffer around labels, after BUFFER 1 one should add
OUTLINECOLOR 255 255
255 (or another colour as appropriate).
All the best, and many thanks.
Hi Paolo,
thanks for the observations.
I filed a (combined) issue for it:
http://trac.osgeo.org/qgis/ticket/2848
List,
I fixed some issues with the mapserver plugin like the ones mentioned
above.
I'm not sure though if I dare to check it in for this next release
without some more testing.
Is anybody available to do some more testing? Please use attached
ms_export.py instead of the ms_export.py from you apps directory and
test it:
[yourqgis install dir]/share/qgis/python/plugins/mapserver_export
The qgis-view and mapserver-view should be more like each other now, in
alle different classifications.
The map file syntax should be better now (for STYLE and CLASS parts).
There are still some discrepancies though. Like I could not a mapserver
version of the label-buffer function etc.
Also note that the plugin only works with the 'old symbology' (should I
alert the user when trying to do a layer with 'symbology NG'?)
I also attached this ms_export.py to the ticket:
http://trac.osgeo.org/qgis/ticket/2848
in case the attachement get's detached.
Regards,
Richard
#***************************************************************************
# ms_export.py
# --------------------------------------
# Date : Sun Sep 16 12:33:46 AKDT 2007
# Copyright : (C) 2008 by Gary E. Sherman
# Email : sherman at mrcc dot com
#***************************************************************************
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU General Public License as published by *
#* the Free Software Foundation; either version 2 of the License, or *
#* (at your option) any later version. *
#* *
#***************************************************************************/
# This class exports a QGIS project file to a mapserver .map file.
# All the work is done in the writeMapFile method. The msexport binary
# presents a Qt based GUI that collects the needed information for this
# script.
# Matthew Perry contributed major portions of this work.
# Adapted by Erik van de Pol
#
# CHANGES SHOULD NOT BE MADE TO THE writeMapFile METHOD UNLESS YOU
# ARE CHANGING THE QgsMapserverExport CLASS AND YOU KNOW WHAT YOU ARE
# DOING
from xml.dom import minidom
from string import *
import platform
from qgis.core import QgsDataSourceURI
from qgis.core import QgsMapLayerRegistry
#from qgis.core import QgsProject
from PyQt4.QtCore import QString
from PyQt4.QtCore import QVariant
# symbol map
qgis2map_symbol = {
"hard:circle" : "circle",
"hard:triangle" : "triangle",
"hard:equilateral_triangle" : "equilateral-triangle",
"hard:rectangle" : "square",
"hard:regular_star" : "star",
"hard:diamond" : "diamond"
}
# alignment/position map
qgis2map_aligment2position = {
"center" : "cc",
"above" : "uc",
"right" : "cr",
"below" : "lc",
"left" : "cl",
"aboveright" : "ur",
"belowright" : "lr",
"belowleft" : "ll",
"aboveleft" : "ul"
}
# the keys are fonts that must be available in QGis
# the values in this dictionary must correspond to
# the fonts in the file denoted by the FONTSET in the mapfile
#
# "MS Shell Dlg 2" is the default label font in QGis.
# The automatic mapping to "Tahoma" is correct for Windows 2000, Windows XP,
# Windows Server 2003, Windows Vista and Windows 7.
# See: http://msdn.microsoft.com/en-us/library/dd374112%28VS.85%29.aspx
qgis2map_fontset = {
"Arial" : "arial",
"Courier" : "courier",
"Georgia" : "georgia",
"Times New Roman" : "times",
"Trebuchet MS" : "trebuchet_ms",
"Verdana" : "verdana",
"Tahoma" : "tahoma",
"MS Shell Dlg 2" : "tahoma"
}
# Note that tahoma-italic and tahoma-bold-italic do not exist.
# Therefore a mapping to the corresponding verdana-variants is made
# in the fonts file pointed to by the fontsPath. Feel free to map to another font there.
bool2str = {True: "true", False: "false"}
# This is a magic number now. Rationale?
symbolSizeMultiplier = 3.5
class Qgis2MapDefaults: pass
defaults = Qgis2MapDefaults()
defaults.fontsPath = "./fonts/fonts.txt"
defaults.symbolsPath = "./symbols/symbols.txt"
if platform.system() == "Windows":
defaults.mapServerUrl = "http://my.host.com/cgi-bin/mapserv.exe";
else:
defaults.mapServerUrl = "http://localhost/cgi-bin/mapserv";
defaults.width = "100"
defaults.height = "100"
defaults.dump = True
defaults.force = True
defaults.partials = True
defaults.antialias = True
class Qgis2Map:
def __init__(self, mapFile):
self.mapFile = mapFile
# init the other members that are not set by the constructor
self.mapServerUrl = defaults.mapServerUrl
self.fontsPath = defaults.fontsPath
self.symbolsPath = defaults.symbolsPath
self.units = ''
self.imageType = ''
self.mapName = ''
self.width = defaults.width
self.height = defaults.height
self.minimumScale = ''
self.maximumScale = ''
self.template = ''
self.header = ''
self.footer = ''
self.dump = bool2str[defaults.dump]
self.force = bool2str[defaults.force]
self.antialias = bool2str[defaults.antialias]
self.partials = bool2str[defaults.partials]
self.symbolQueue = {}
def setQgsProject(self, projectFileName):
try:
self.projectFileName = projectFileName
# create the DOM
self.qgs = minidom.parse(unicode(self.projectFileName))
return True
except:
return False
# Set the options collected from the GUI
def setOptions(self, msUrl, units, image, mapname, width, height, template, header, footer, dump, force, antialias, partials, exportLayersOnly, fontsPath, symbolsPath):
if msUrl.encode('utf-8') != "":
self.mapServerUrl = msUrl.encode('utf-8')
if fontsPath.encode('utf-8') != "":
self.fontsPath = fontsPath.encode('utf-8')
if symbolsPath.encode('utf-8') != "":
self.symbolsPath = symbolsPath.encode('utf-8')
if width.encode('utf-8') != "":
self.width = width.encode('utf-8')
if height.encode('utf-8') != "":
self.height = height.encode('utf-8')
self.units = units.encode('utf-8')
self.imageType = image.encode('utf-8')
self.mapName = mapname.encode('utf-8')
#self.minimumScale = minscale
#self.maximumScale = maxscale
# TEMPLATE is needed for getFeatureInfo requests in WMS:
# always set someting ...
template = template.encode('utf-8')
if template == "":
template = "fooOnlyForWMSGetFeatureInfo"
self.template = template
self.header = header.encode('utf-8')
self.footer = footer.encode('utf-8')
#print units, image, mapname, width, height, template, header, footer
self.dump = bool2str[dump]
self.force = bool2str[force]
self.antialias = bool2str[antialias]
self.partials = bool2str[partials]
self.exportLayersOnly = exportLayersOnly
# method to check the project file for the exitence of postgis layers
# if so it should be loaded in qgis before exporting, because a connection
# to the database is needed to determine primary keys etc etc
def projectHasPostgisLayers(self):
# get the list of maplayer nodes
maplayers = self.qgs.getElementsByTagName("maplayer")
for lyr in maplayers:
try:
providerString = lyr.getElementsByTagName("provider")[0].childNodes[0].nodeValue.encode('utf-8')
except:
print "ERROR getting provider string from layer"
# if providerString is null
providerString = ''
if providerString == 'postgres':
#print "POSTGIS LAYER !!"
return True
return False
## All real work happens here by calling methods to write the
## various sections of the map file
def writeMapFile(self):
# open the output file
print "creating the map file"
self.outFile = open(self.mapFile, 'w')
logmsg = "Starting\n"
if self.exportLayersOnly == False:
# write the general map and web settings
print " --- python : map section "
self.writeMapSection()
logmsg += "Wrote map section\n"
print " --- python : map section done"
# write the projection section
print " --- python : proj section "
self.writeProjectionSection()
logmsg += "Wrote projection section\n"
print " --- python : proj section done"
# write the output format section
print " --- python : outputformat section "
self.writeOutputFormat()
logmsg += "Wrote output format section\n"
print " --- python : outputformat section done"
# write the legend section
print " --- python : legend section"
self.writeLegendSection()
logmsg += "Wrote legend section\n"
print " --- python : legend section done"
# write the WEB section
print " --- python : web section "
webMsg = self.writeWebSection()
logmsg += "Wrote web section\n"
logmsg += webMsg
print " --- python : web section done"
# write the LAYER sections
print " --- python : layer section "
layersMsg = self.writeMapLayers()
logmsg += "Wrote map layers\n"
logmsg += layersMsg
print " --- python : layer section done"
if self.exportLayersOnly == False:
# we use an external synbol set instead
# write the symbol defs section
# must happen after layers so we can build a symbol queue
#print " --- python : symbol section "
#self.writeSymbolSection()
#logmsg += "Wrote symbol section\n"
#print " --- python : symbol section done"
# END and close the map file
self.outFile.write("END")
self.outFile.close()
logmsg += "Map file completed for " + self.projectFileName + "\n"
logmsg += "Map file saved as " + self.mapFile + "\n"
if self.exportLayersOnly:
logmsg += "\n> We only saved the LAYER portion of the map file. \nMerge this into an excisting map file to see it working\n"
else:
logmsg += "\n> If this mapfile is accessible by your mapserver, you\nshould be able to see the capabilities by firing this url:\n" + self.mapServerUrl + "?MAP="+self.mapFile+"&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetCapabilities\n"
logmsg += "\n> if this mapfile is accessible by your mapserver, you\nshould be able to see a map by firing this url:\n" + self.mapServerUrl + "?MAP="+self.mapFile+"&SERVICE=WMS&LAYERS=ALL&MODE=MAP\n"
return logmsg
# Write the general parts of the map section
def writeMapSection(self):
self.outFile.write("# Map file created from QGIS project file " + str(self.projectFileName).encode('utf-8') + "\n")
self.outFile.write("# Edit this file to customize for your map interface\n")
self.outFile.write("# (Created with PyQgis MapServer Export plugin)\n")
self.outFile.write("MAP\n")
self.outFile.write(" NAME \"" + self.mapName + "\"\n")
self.outFile.write(" # Map image size\n")
if self.width == '' or self.height == '':
self.outFile.write(" SIZE 0 0\n")
else:
self.outFile.write(" SIZE " + str(self.width) + " " + str(self.height) + "\n")
self.outFile.write(" UNITS %s\n" % (self.units))
self.outFile.write("\n")
# extents
self.outFile.write(self.getExtentString())
self.outFile.write(" FONTSET '" + self.fontsPath + "'\n")
# use of external symbol set
self.outFile.write(" SYMBOLSET '" + self.symbolsPath + "'\n")
def getExtentString(self):
stringToAddTo = ""
xmin = self.qgs.getElementsByTagName("xmin")
stringToAddTo += " EXTENT "
stringToAddTo += xmin[0].childNodes[0].nodeValue.encode('utf-8')
stringToAddTo += " "
ymin = self.qgs.getElementsByTagName("ymin")
stringToAddTo += ymin[0].childNodes[0].nodeValue.encode('utf-8')
stringToAddTo += " "
xmax = self.qgs.getElementsByTagName("xmax")
stringToAddTo += xmax[0].childNodes[0].nodeValue.encode('utf-8')
stringToAddTo += " "
ymax = self.qgs.getElementsByTagName("ymax")
stringToAddTo += ymax[0].childNodes[0].nodeValue.encode('utf-8')
stringToAddTo += "\n"
return stringToAddTo
# Write the OUTPUTFORMAT section
def writeOutputFormat(self):
self.outFile.write(" # Background color for the map canvas -- change as desired\n")
self.outFile.write(" IMAGECOLOR 255 255 255\n")
self.outFile.write(" IMAGEQUALITY 95\n")
self.outFile.write(" IMAGETYPE " + self.imageType + "\n")
self.outFile.write("\n")
self.outFile.write(" OUTPUTFORMAT\n")
self.outFile.write(" NAME " + self.imageType + "\n")
if self.imageType == 'agg':
self.outFile.write(" DRIVER AGG/PNG\n")
self.outFile.write(" IMAGEMODE RGB\n")
else:
self.outFile.write(" DRIVER 'GD/" + self.imageType.upper() + "'\n")
self.outFile.write(" MIMETYPE 'image/" + lower(self.imageType) + "'\n")
if self.imageType.lower() != "gif":
self.outFile.write(" IMAGEMODE RGBA\n")
self.outFile.write(" EXTENSION '" + lower(self.imageType) + "'\n")
self.outFile.write(" END\n")
# Write Projection section
def writeProjectionSection(self):
# Need to get the destination srs from one of the map layers since
# the project file doesn't contain the epsg id or proj4 text for
# the map apart from that defined in each layer
self.outFile.write(" PROJECTION\n")
# Get the proj4 text from the first map layer's destination SRS
destsrs = self.qgs.getElementsByTagName("destinationsrs")[0]
proj4Text = destsrs.getElementsByTagName("proj4")[0].childNodes[0].nodeValue.encode('utf-8')
# the proj4 text string needs to be reformatted to make mapserver happy
self.outFile.write(self.formatProj4(proj4Text))
self.outFile.write(" END\n\n")
# Write the LEGEND section
def writeLegendSection(self):
self.outFile.write(" # Legend\n")
self.outFile.write(" LEGEND\n")
self.outFile.write(" IMAGECOLOR 255 255 255\n")
self.outFile.write(" STATUS ON\n")
self.outFile.write(" KEYSIZE 18 12\n")
self.outFile.write(" LABEL\n")
self.outFile.write(" TYPE BITMAP\n")
self.outFile.write(" SIZE MEDIUM\n")
self.outFile.write(" COLOR 0 0 89\n")
self.outFile.write(" END\n")
self.outFile.write(" END\n\n")
# groups are ignored as of yet
self.legendlayerfileNodesById = {}
for legendlayerfileNode in self.qgs.getElementsByTagName("legend")[0].getElementsByTagName("legendlayerfile"):
key = legendlayerfileNode.getAttribute("layerid").encode("utf-8")
if (key != ""):
self.legendlayerfileNodesById[key] = legendlayerfileNode
# Write the symbol definitions
def writeSymbolSection(self):
for symbol in self.symbolQueue.keys():
self.outFile.write( self.symbolQueue[symbol] )
self.outFile.write( "\n" )
# Write the WEB section of the map file
def writeWebSection(self):
resultMsg = ""
self.outFile.write(" # Web interface definition. Only the template parameter\n")
self.outFile.write(" # is required to display a map. See MapServer documentation\n")
self.outFile.write(" WEB\n")
self.outFile.write(" # Set IMAGEPATH to the path where MapServer should\n")
self.outFile.write(" # write its output.\n")
self.outFile.write(" IMAGEPATH '/tmp/'\n")
self.outFile.write("\n")
self.outFile.write(" # Set IMAGEURL to the url that points to IMAGEPATH\n")
self.outFile.write(" # as defined in your web server configuration\n")
self.outFile.write(" IMAGEURL '/tmp/'\n")
self.outFile.write("\n")
destsrs = self.qgs.getElementsByTagName("destinationsrs")[0]
try:
epsg = destsrs.getElementsByTagName("srid")[0].childNodes[0].nodeValue.encode("utf-8")
except:
# default to epsg
epsg="4326"
self.outFile.write(" # WMS server settings\n")
self.outFile.write(" METADATA\n")
self.outFile.write(" 'ows_title' '" + self.mapName + "'\n")
# if mapserverurl is still defaults.mapServerUrl, give warning
if defaults.mapServerUrl==self.mapServerUrl:
resultMsg += " ! MapServer url still default value: '" + defaults.mapServerUrl + \
"'?\n Be sure there is a valid mapserverurl in the 'ows_onlineresource'.\n"
self.outFile.write(" 'ows_onlineresource' '" + self.mapServerUrl + "?" + "map" + "=" + self.mapFile + "'\n")
self.outFile.write(" 'ows_srs' 'EPSG:" + epsg + "'\n")
self.outFile.write(" END\n\n")
self.outFile.write(" #Scale range at which web interface will operate\n")
if self.minimumScale != "":
self.outFile.write(" MINSCALE " + self.minimumScale + "\n")
if self.maximumScale != "":
self.outFile.write(" MAXSCALE " + self.maximumScale + "\n")
self.outFile.write(" # Template and header/footer settings\n")
self.outFile.write(" # Only the template parameter is required to display a map. See MapServer documentation\n")
if self.template != "":
self.outFile.write(" TEMPLATE '" + self.template + "'\n")
if self.header != "":
self.outFile.write(" HEADER '" + self.header + "'\n")
if self.footer != "":
self.outFile.write(" FOOTER '" + self.footer + "'\n")
self.outFile.write(" END\n\n")
return resultMsg
# Write the map layers - we have to defer writing to disk so we
# can invert the order of the layes, since they are opposite in QGIS
# compared to mapserver
def writeMapLayers(self):
resultMsg = ''
# get the layers from the legend to be able to determine the order later
legend_layers = self.qgs.getElementsByTagName("legendlayerfile")
self.layer_order = list()
for legend_layer in legend_layers:
self.layer_order.append(legend_layer.getAttribute("layerid").encode('utf-8'))
# get the list of maplayer nodes
maplayers = self.qgs.getElementsByTagName("maplayer")
print "Processing ", len(maplayers), " layers"
count = 0
layer_list = dict()
layer_names = []
for lyr in maplayers:
count += 1
print "Processing layer ", count
# The attributes of the maplayer tag contain the scale dependent settings,
# visibility, and layer type
layer_def = " LAYER\n"
# store name of the layer - replace space with underscore for wms compliance
layer_name = lyr.getElementsByTagName("layername")[0].childNodes[0].nodeValue.encode('utf-8').replace("\"", "").replace(" ","_")
# layername is not unique in qgis, store id of layer
layer_id = lyr.getElementsByTagName("id")[0].childNodes[0].nodeValue.encode('utf-8')
# first check to see if there is a name
if len(layer_name) > 0:
# WMS layernames should be unique, so
# if the layer_name already excists in our layer_list of names:
if layer_name in layer_names:
# we give it the old name plus number
layer_name = layer_name + str(count)
else:
# if no name for the layer, manufacture one
layer_name = 'layer' + str(count)
# store the name to be able to check for double names
layer_names.append(layer_name)
layer_def += " NAME '%s'\n" % layer_name
if lyr.getAttribute("type").encode('utf-8') == 'vector':
layer_def += " TYPE " + lyr.getAttribute("geometry").encode('utf-8').upper() + "\n"
elif lyr.getAttribute("type").encode('utf-8') == 'raster':
layer_def += " TYPE " + lyr.getAttribute("type").encode('utf-8').upper() + "\n"
# Use (global) default value from the gui
layer_def += " DUMP " + self.dump + "\n"
# id dump = true: add TEMPLATE to be able to use getFeatureInfoRequests
if self.dump=="true":
layer_def += " TEMPLATE fooOnlyForWMSGetFeatureInfo\n"
# Set min/max scales
if lyr.getAttribute('hasScaleBasedVisibilityFlag').encode('utf-8') == 1:
layer_def += " MINSCALE " + lyr.getAttribute('minimumScale').encode('utf-8') + "\n"
layer_def += " MAXSCALE " + lyr.getAttribute('maximumScale').encode('utf-8') + "\n"
layer_def += self.getExtentString()
# data
dataString = lyr.getElementsByTagName("datasource")[0].childNodes[0].nodeValue.encode('utf-8')
# test if it is a postgis, grass or WMS layer
# is there a better way to do this? probably.
try:
providerString = lyr.getElementsByTagName("provider")[0].childNodes[0].nodeValue.encode('utf-8')
except:
# if providerString is null
providerString = ''
if providerString == 'postgres':
# it's a postgis layer
uri = QgsDataSourceURI(dataString)
layer_def += " CONNECTIONTYPE postgis\n"
connectionInfo = str(uri.connectionInfo())
# if connectionInfo does NOT contain a password, warn user:
if connectionInfo.find("password")<0:
resultMsg += " ! No password in connection string for postgres layer '" + layer_name + \
"' \n Add it, or make sure mapserver can connect to postgres.\n"
layer_def += " CONNECTION \"" + connectionInfo + "\"\n"
# EvdP: it seems that the uri.geometryColumn() is quoted automatically by PostGIS.
# To prevent double quoting, we don't quote here.
# Now we are unable to process uri.geometryColumn()s with special characters (uppercase... etc.)
#layer_def += " DATA '\"" + uri.geometryColumn() + "\" FROM " + uri.quotedTablename() + "'\n"
#layer_def += " DATA '" + uri.geometryColumn() + " FROM " + uri.quotedTablename() + "'\n"
layer_id = lyr.getElementsByTagName("id")[0].childNodes[0].nodeValue.encode("utf-8")
uniqueId = self.getPrimaryKey(layer_id, uri.table())
# %tablename% is returned when no uniqueId is found: inform user
if uniqueId.find("%") >= 0:
resultMsg += " ! No primary key found for postgres layer '" + layer_name + \
"' \n Make sure you edit the mapfile and change the DATA-string \n containing '" + uniqueId + "'\n"
epsg = self.getEpsg(lyr)
layer_def += " DATA '" + uri.geometryColumn() + " FROM " + uri.quotedTablename() + " USING UNIQUE " + uniqueId + " USING srid=" + epsg + "'\n"
# don't write the filter keyword if there isn't one
if uri.sql() != "":
layer_def += " FILTER ( " + uri.sql() + " )\n"
elif providerString == 'wms' and lyr.getAttribute("type").encode('utf-8').upper() == 'RASTER':
# it's a WMS layer
layer_def += " CONNECTIONTYPE WMS\n"
layer_def += " CONNECTION '" + dataString + "'\n"
rasterProp = lyr.getElementsByTagName("rasterproperties")[0]
# loop thru wmsSubLayers
wmsSubLayers = rasterProp.getElementsByTagName('wmsSublayer')
wmsNames = []
wmsStyles = []
for wmsLayer in wmsSubLayers:
wmsNames.append( wmsLayer.getElementsByTagName('name')[0].childNodes[0].nodeValue.encode('utf-8').replace("\"", "") )
try:
wmsStyles.append( wmsLayer.getElementsByTagName('style')[0].childNodes[0].nodeValue.encode('utf-8') )
except:
wmsStyles.append( '' )
# Create necesssary wms metadata
format = rasterProp.getElementsByTagName('wmsFormat')[0].childNodes[0].nodeValue.encode('utf-8')
layer_def += " METADATA\n"
layer_def += " 'ows_name' '" + ','.join(wmsNames) + "'\n"
layer_def += " 'wms_server_version' '1.1.1'\n"
try:
#ct = lyr.getElementsByTagName('coordinatetransform')[0]
#srs = ct.getElementsByTagName('sourcesrs')[0].getElementsByTagName('spatialrefsys')[0]
#epsg = srs.getElementsByTagName('epsg')[0].childNodes[0].nodeValue.encode('utf-8')
#layer_def += " 'wms_srs' 'EPSG:4326 EPSG:" + epsg + "'\n"
layer_def += " 'ows_srs' 'EPSG:" + self.getEpsg(lyr) + "'\n"
# TODO: add epsg to all METADATA tags??
except:
print "ERROR while trying to write ows_srs METADATA"
pass
layer_def += " 'wms_format' '" + format + "'\n"
layer_def += " 'wms_style' '" + ','.join(wmsStyles) + "'\n"
layer_def += " END\n"
else:
# its a standard ogr, gdal or grass layer
layer_def += " DATA '" + dataString + "'\n"
# WMS settings for all layers
layer_def += " METADATA\n"
layer_def += " 'ows_title' '" + layer_name + "'\n"
layer_def += " END\n"
layer_def += " STATUS OFF\n"
# turn status in MapServer on or off based on visibility in QGis:
# layer_id = lyr.getElementsByTagName("id")[0].childNodes[0].nodeValue.encode("utf-8")
# legendLayerNode = self.legendlayerfileNodesById[layer_id]
# if legendLayerNode.getAttribute("visible").encode("utf-8") == "1":
# layer_def += " STATUS ON\n"
# else:
# layer_def += " STATUS OFF\n"
opacity = int ( 100.0 *
float(lyr.getElementsByTagName("transparencyLevelInt")[0].childNodes[0].nodeValue.encode('utf-8')) / 255.0 )
layer_def += " TRANSPARENCY " + str(opacity) + "\n"
layer_def += " PROJECTION\n"
# Get the destination srs for this layer and use it to create the projection section
destsrs = self.qgs.getElementsByTagName("destinationsrs")[0]
proj4Text = destsrs.getElementsByTagName("proj4")[0].childNodes[0].nodeValue.encode('utf-8')
# TODO: you would think: take DATA-srs here, but often projected
# shapefiles do not contain srs data ... If we want to do this
# we should take make the map-srs the qgs-project srs first
# instead of taking the srs of the first layer
# Get the data srs for this layer and use it to create the projection section
# datasrs = lyr.getElementsByTagName("srs")[0]
# proj4Text = datasrs.getElementsByTagName("proj4")[0].childNodes[0].nodeValue.encode('utf-8')
# the proj4 text string needs to be reformatted to make mapserver happy
layer_def += self.formatProj4(proj4Text)
layer_def += " END\n"
scaleDependent = lyr.getAttribute("hasScaleBasedVisibilityFlag").encode('utf-8')
if scaleDependent == '1':
# get the min and max scale settings
minscale = lyr.getAttribute("minimumScale").encode('utf-8')
maxscale = lyr.getAttribute("maximumScale").encode('utf-8')
if minscale > '':
layer_def += " MINSCALE " + minscale + "\n"
if maxscale > '':
layer_def += " MAXSCALE " + maxscale + "\n"
# Check for label field (ie LABELITEM) and label status
try:
labelElements = lyr.getElementsByTagName("label")
labelOn = '0'
labelField = None
# there are actually 3 different label-element in a layer element:
for element in labelElements:
labelParent = element.parentNode.localName
if labelParent == 'maplayer':
labelOn = element.childNodes[0].nodeValue.encode('utf-8')
if labelParent == 'labelattributes':
labelField = element.getAttribute('fieldname').encode('utf-8')
if labelField != '' and labelField is not None and labelOn == "1" and labelOn is not None:
layer_def += " LABELITEM '" + labelField + "'\n"
except:
# no labels
pass
# write the CLASS section for rendering
# First see if there is a single symbol renderer
if lyr.getElementsByTagName("singlesymbol").length > 0:
layer_def += self.simpleRenderer(lyr, lyr.getElementsByTagName("singlesymbol")[0].getElementsByTagName('symbol')[0] )
elif lyr.getElementsByTagName("graduatedsymbol").length > 0:
layer_def += self.graduatedRenderer(lyr, lyr.getElementsByTagName("graduatedsymbol")[0].getElementsByTagName('symbol')[0] )
elif lyr.getElementsByTagName("continuoussymbol").length > 0:
layer_def += self.continuousRenderer(lyr, lyr.getElementsByTagName("continuoussymbol")[0] )
elif lyr.getElementsByTagName("uniquevalue").length > 0:
layer_def += self.uniqueRenderer(lyr, lyr.getElementsByTagName("uniquevalue")[0].getElementsByTagName('symbol')[0] )
# end of LAYER
layer_def += " END\n\n"
# add the layer to the list with layer_id as key
layer_list[layer_id] = layer_def
# all layers have been processed, reverse the layer_order and write
# output layer_def's in order as they appear in legend (as seen by user)
self.layer_order.reverse()
for layerid in self.layer_order:
self.outFile.write(layer_list[layerid])
return resultMsg
def getEpsg(self, lyr):
try:
srs = lyr.getElementsByTagName('srs')[0].getElementsByTagName('spatialrefsys')[0]
return srs.getElementsByTagName('srid')[0].childNodes[0].nodeValue.encode('utf-8')
except:
#Use 4326 as a sensible default if the above fails
return "4326"
def getPrimaryKey(self, layerId, tableName):
"""
Since we have no Python bindings for "src\providers\postgres\qgspostgresprovider.cpp"
we approximate the primary key by finding an integer type field containing "fid" or "id"
This is obviously a lousy solution at best.
This script requires the project you export to be open in QGis!!
This method will return either the primary key of this table, or
the string %tablename% in case we're not able to find it...
"""
mlr = QgsMapLayerRegistry.instance()
layers = mlr.mapLayers()
if not QString(layerId) in layers:
# layerId of this postgis layer NOT in the layerlist...
# probably the project is not loaded in qgis
#raise Exception("ERROR: layer not found in project layers.... \nThis happens with postgis layers in a project which \nis not loaded in QGis.\nDid you load this project into QGis? \nIf not please load project first, and then export it to mapserver.")
return str("%" + tableName + "_id%")
layer = layers[QString(layerId)]
dataProvider = layer.dataProvider()
fields = dataProvider.fields()
intTypes = [QVariant.Int, QVariant.LongLong, QVariant.UInt, QVariant.ULongLong]
integerFields = []
for id, field in fields.iteritems():
if field.type() in intTypes:
integerFields.append(id)
# fid end
fidIntegerFields = []
for id in integerFields:
if fields[id].name().endsWith("fid"):
fidIntegerFields.append(id)
if len(fidIntegerFields) == 1:
return str(fields[fidIntegerFields[0]].name())
# fid start
fidIntegerFields[:] = []
for id in integerFields:
if fields[id].name().startsWith("fid"):
fidIntegerFields.append(id)
if len(fidIntegerFields) == 1:
return str(fields[fidIntegerFields[0]].name())
# id end
idIntegerFields = []
for id in integerFields:
if fields[id].name().endsWith("id"):
idIntegerFields.append(id)
if len(idIntegerFields) == 1:
return str(fields[idIntegerFields[0]].name())
# id start
idIntegerFields[:] = []
for id in integerFields:
if fields[id].name().startsWith("id"):
idIntegerFields.append(id)
if len(idIntegerFields) == 1:
return str(fields[idIntegerFields[0]].name())
# if we arrive here we have ambiguous or no primary keys
#print "Error: Could not find primary key from field type and field name information.\n"
# using a mapfile pre-processor, the proper id field can be substituted in the following:
return str("%" + tableName + "_id%")
# Get RGB code from a XML color node, returning string like '45 124 255'
def getRgbFromNode(self, symbolNode, elementName):
if symbolNode == None or symbolNode.getElementsByTagName(elementName).length == 0:
return ''
colorNode = symbolNode.getElementsByTagName(elementName)[0]
return colorNode.getAttribute('red').encode('utf-8') + ' ' + colorNode.getAttribute('green').encode('utf-8') + ' ' + colorNode.getAttribute('blue').encode('utf-8')
# Get a size (multiplied by symbolSizeMultiplier) from given sizeNode's child with elementName
def getSizeStringFromNode(self, symbolNode, elementName):
if symbolNode == None or symbolNode.getElementsByTagName(elementName).length == 0:
return ''
size = float(symbolNode.getElementsByTagName(elementName)[0].childNodes[0].nodeValue.encode('utf-8'))
symbolSize = size * symbolSizeMultiplier
return str(symbolSize)
def getSymbolProperty(self, symbolNode, elementName):
if symbolNode == None or symbolNode.getElementsByTagName(elementName).length == 0:
return ''
return str(symbolNode.getElementsByTagName(elementName)[0].childNodes[0].nodeValue.encode('utf-8'))
def writeClassStyleContent(self, symbolNode, geometry):
outlinecolor = self.getRgbFromNode(symbolNode, 'outlinecolor')
fillcolor = self.getRgbFromNode(symbolNode, 'fillcolor')
pointsize = self.getSizeStringFromNode(symbolNode, 'pointsize')
outlinewidth = self.getSizeStringFromNode(symbolNode, 'outlinewidth')
fillpattern = self.getSymbolProperty(symbolNode, 'fillpattern');
class_def = " STYLE\n"
# for POINT by SYMBOL and SIZE
if geometry == 'POINT':
# use the point symbol map to lookup the mapserver symbol type
symbol = self.msSymbol( geometry, symbolNode )
class_def += " SYMBOL " + symbol + " \n"
class_def += " SIZE " + pointsize + " \n"
# for LINE and POLYGON size define by WIDTH
else:
class_def += " WIDTH " + outlinewidth + " \n"
# for LINE defined by COLOR from outlinecolor
if geometry == 'LINE':
class_def += " COLOR " + outlinecolor + "\n"
# for POLYGON and POINT defined by COLOR from fillcolor and OUTLINECOLOR from outlinecolor
else:
class_def += " OUTLINECOLOR " + outlinecolor + "\n"
if 'NoBrush' != fillpattern:
class_def += " COLOR " + fillcolor + "\n"
class_def += " END\n"
return class_def
# Simple renderer ouput
# We need the layer node and symbol node
def simpleRenderer(self, layerNode, symbolNode):
# get the layers geometry type
geometry = layerNode.getAttribute("geometry").encode('utf-8').upper()
class_def = " CLASS\n"
class_def += " NAME '" + layerNode.getElementsByTagName("layername")[0].childNodes[0].nodeValue.encode('utf-8').replace("\"", "") + "' \n"
class_def += self.writeClassStyleContent(symbolNode, geometry)
class_def += self.msLabel( layerNode )
# end of CLASS
class_def += " END\n"
return class_def
# Graduated symbol renderer output
def graduatedRenderer(self, layerNode, symbolNode):
# get the layers geometry type
geometry = layerNode.getAttribute("geometry").encode('utf-8').upper()
# get the renderer field for building up the classes
classField = layerNode.getElementsByTagName('classificationattribute')[0].childNodes[0].nodeValue.encode('utf-8')
# write the render item
class_def = " CLASSITEM '" + classField + "'\n"
# write the rendering info for each class
classes = layerNode.getElementsByTagName('symbol')
for cls in classes:
class_def += " CLASS\n"
lower = cls.getElementsByTagName('lowervalue')[0].childNodes[0].nodeValue.encode('utf-8')
upper = cls.getElementsByTagName('uppervalue')[0].childNodes[0].nodeValue.encode('utf-8')
# If there's a label use it, otherwise autogenerate one
try:
label = cls.getElementsByTagName('label')[0].childNodes[0].nodeValue.encode('utf-8')
class_def += " NAME '" + label + "'\n"
except:
class_def += " NAME '" + lower + " < " + classField + " < " + upper + "'\n"
class_def += " EXPRESSION ( ([" + classField + "] >= " + lower + ") AND ([" + classField + "] <= " + upper + ") )\n"
class_def += self.writeClassStyleContent(cls, geometry)
# label
class_def += self.msLabel( layerNode )
# end of CLASS
class_def += " END\n"
return class_def
# Continuous symbol renderer output
def continuousRenderer(self, layerNode, symbolNode):
# get the layers geometry type
geometry = layerNode.getAttribute("geometry").encode('utf-8').upper()
# get the renderer field for building up the classes
classField = layerNode.getElementsByTagName('classificationattribute')[0].childNodes[0].nodeValue.encode('utf-8')
# write the rendering info for each class
class_def = " CLASS\n"
# Class name irrelevant for color ramps since mapserver can't render their legend
#self.outFile.write(" NAME '" + classField + "'\n")
# color
lower = symbolNode.getElementsByTagName('lowestsymbol')[0].getElementsByTagName('symbol')[0]
upper = symbolNode.getElementsByTagName('highestsymbol')[0].getElementsByTagName('symbol')[0]
lowerColor = lower.getElementsByTagName('outlinecolor')[0]
upperColor = upper.getElementsByTagName('outlinecolor')[0]
# outline color
outlineNode = lower.getElementsByTagName('outlinecolor')[0]
class_def += " STYLE\n"
# The first and last color of the ramp ( r g b r g b )
class_def += " COLORRANGE " + lowerColor.getAttribute('red').encode('utf-8') + " " + lowerColor.getAttribute('green').encode('utf-8') + " " + lowerColor.getAttribute('blue').encode('utf-8') + " " + upperColor.getAttribute('red').encode('utf-8') + " " + upperColor.getAttribute('green').encode('utf-8') + " " + upperColor.getAttribute('blue').encode('utf-8') + "\n"
# The range of values over which to ramp the colors
class_def += " DATARANGE " + lower.getElementsByTagName('lowervalue')[0].childNodes[0].nodeValue.encode('utf-8') + ' ' + upper.getElementsByTagName('lowervalue')[0].childNodes[0].nodeValue.encode('utf-8') + '\n'
class_def += " RANGEITEM '" + classField + "'\n"
# upper and lower have same size
outlinecolor = self.getRgbFromNode(upper, 'outlinecolor')
fillcolor = self.getRgbFromNode(upper, 'fillcolor')
outlinewidth = self.getSizeStringFromNode(upper, 'outlinewidth')
size = float(lower.getElementsByTagName('pointsize')[0].childNodes[0].nodeValue.encode('utf-8'))
pointsize = 2 * size * symbolSizeMultiplier
# for POINT by SYMBOL and SIZE
if geometry == 'POINT':
# use the point symbol map to lookup the mapserver symbol type
symbol = self.msSymbol( geometry, symbolNode )
class_def += " SYMBOL " + symbol + " \n"
class_def += " SIZE " + str(pointsize) + " \n"
# for LINE and POLYGON size define by WIDTH
else:
class_def += " WIDTH " + outlinewidth + " \n"
# for LINE defined by COLOR from outlinecolor
if geometry == 'LINE':
class_def += " COLOR " + outlinecolor + "\n"
# for POLYGON and POINT defined by COLOR from fillcolor and OUTLINECOLOR from outlinecolor
else:
class_def += " COLOR " + fillcolor + "\n"
class_def += " END\n"
# only outlines for polygons
outline = symbolNode.getElementsByTagName('polygonoutline')
if geometry == 'POLYGON' and outline is not None and '1' == outline[0].childNodes[0].nodeValue.encode('utf-8'):
class_def += " STYLE\n"
class_def += " WIDTH 1 " + "\n"
class_def += " OUTLINECOLOR 0 0 0" + "\n"
class_def += " END\n"
# label
class_def += self.msLabel( layerNode )
# end of CLASS
class_def += " END\n"
return class_def
# Unique value renderer output
def uniqueRenderer(self, layerNode, symbolNode):
# get the renderer field for building up the classes
classField = layerNode.getElementsByTagName('classificationattribute')[0].childNodes[0].nodeValue.encode('utf-8')
# get the layers geometry type
geometry = layerNode.getAttribute("geometry").encode('utf-8').upper()
# write the render item
class_def = " CLASSITEM '" + classField + "'\n"
# write the rendering info for each class
classes = layerNode.getElementsByTagName('symbol')
for cls in classes:
class_def += " CLASS\n"
try:
lower = cls.getElementsByTagName('lowervalue')[0].childNodes[0].nodeValue.encode('utf-8')
except IndexError:
# set to blank in the case where the field used for rendering has no value
lower = ""
# If there's a label use it, otherwise autogenerate one
try:
label = cls.getElementsByTagName('label')[0].childNodes[0].nodeValue.encode('utf-8')
class_def += ' NAME "' + label + '"\n'
except:
class_def += ' NAME "' + classField + ' = ' + lower + '" \n'
class_def += ' EXPRESSION "' + lower + '" \n'
class_def += self.writeClassStyleContent(cls, geometry)
# label
class_def += self.msLabel( layerNode )
# end of CLASS
class_def += " END\n"
return class_def
# Utility method to format a proj4 text string into mapserver format
def formatProj4(self, proj4text):
parms = proj4text.split(" ")
ret = ""
for p in parms:
p = p.replace("+","")
ret = ret + " '" + p + "'\n"
return ret
def getProj4(self, proj4text):
"""Returns the proj4 string as a dictionary with key value pairs."""
parms = proj4text.split(" ")
ret = {}
for p in parms:
p = p.replace("+","")
keyValue = p.split("=")
key = keyValue[0]
value = ""
try: value = keyValue[1]
except: value = ""
if key != "":
ret[key] = value
return ret
# Determines the symbol name and adds it to the symbol queue
def msSymbol(self, geometry, symbolNode):
# contains the same markup for a layer regardless of type
# so we infer a symbol type based on the geometry
symbolName = ''
symbol = '0'
if geometry == 'POLYGON':
#symbol = '0'
pass
elif geometry == 'LINE':
#symbol = '0'
pass
elif geometry == 'POINT':
try:
symbolName = qgis2map_symbol[symbolNode.getElementsByTagName('pointsymbol')[0].childNodes[0].nodeValue.encode('utf-8')]
except:
symbolName = "circle"
# make sure it's double quoted
symbol = "\"" + symbolName + "\""
# a symbol set in an external symbol.txt file is used; see comment on top of this file
# if symbolName == 'CIRCLE':
# self.symbolQueue['CIRCLE'] = """
# #Circle symbol
# SYMBOL
# NAME 'CIRCLE'
# TYPE ellipse
# FILLED true
# POINTS
# 1 1
# END
# END """
#
# if symbolName == 'TRIANGLE':
# self.symbolQueue['TRIANGLE'] = """
# SYMBOL
# NAME "TRIANGLE"
# TYPE vector
# FILLED true
# POINTS
# 0 1
# .5 0
# 1 1
# 0 1
# END
# END """
return symbol
# Label block creation
def msLabel(self, layerNode):
# currently a very basic bitmap font
labelNode = layerNode.getElementsByTagName('labelattributes')[0]
#labelField = labelNode.getElementsByTagName('label')[0].getAttribute('field').encode('utf-8')
# why was the attribute 'field' and not 'fieldname'?
labelField = labelNode.getElementsByTagName('label')[0].getAttribute('fieldname').encode('utf-8')
if labelField != '' and labelField is not None:
labelBlock = " LABEL \n"
# see comment at 'qgis2ms_fontset'
fontQgis = labelNode.getElementsByTagName('family')[0].getAttribute('name').encode('utf-8')
fontMs = ""
try:
fontMs = qgis2map_fontset[fontQgis]
except:
# we default to the first font in the fontset, if any are present
if len(qgis2map_fontset) > 0:
try:
fontMs = qgis2map_fontset["MS Shell Dialog 2"]
except:
sortedKeys = qgis2map_fontset.keys()
sortedKeys.sort()
fontMs = qgis2map_fontset[sortedKeys[0]]
else:
fontMs = ""
bold = bool(int(labelNode.getElementsByTagName('bold')[0].getAttribute('on').encode("utf-8")))
italic = bool(int(labelNode.getElementsByTagName('italic')[0].getAttribute('on').encode("utf-8")))
# "-bold" and "-italic" must correspond with the fontset file
# font can be both bold and italic
labelBlock += " FONT " + fontMs
if bold: labelBlock += "-bold"
if italic: labelBlock += "-italic"
labelBlock += "\n"
labelBlock += " TYPE truetype\n"
size = self.getFieldName(labelNode, 'size')
if size == "":
sizeNode = labelNode.getElementsByTagName('size')[0]
units = sizeNode.getAttribute("units").encode("utf-8")
sizeValue = int(sizeNode.getAttribute("value").encode("utf-8"))
# we must convert to px for use in the mapfile
sizePx = 11 # default
sizePx = sizeValue
#if units == "pt": sizePx = int(sizeValue / 0.75)
# TODO: find appropriate conversion metric from map units to pixels
#elif unit == "mu":
#proj4Elem = labelNode.parentNode.getElementsByTagName("proj4")[0].childNodes[0]
#proj4str = proj4Elem.nodeValue.encode('utf-8')
#proj4Dict = self.getProj4(proj4str)
#for i,j in proj4Dict.iteritems():
#labelBlock += str(i) + ":: " + str(j) + "\n"
#
#sizePx = ????? proj4Dict["units"] ??
# non-used unit types:
#elif unit == "em": sizePx = int(size * 16.0)
#elif unit == "px": sizePx = size
size = str(sizePx)
labelBlock += " SIZE " + size + "\n"
color = self.getFieldName(labelNode, 'color')
if color == "":
colorNode = labelNode.getElementsByTagName('color')[0]
r = int(colorNode.getAttribute("red"))
g = int(colorNode.getAttribute("green"))
b = int(colorNode.getAttribute("blue"))
color = str(r) + " " + str(g) + " " + str(b)
labelBlock += " COLOR " + color + "\n"
# Include label angle if specified
# Note that angles only work for truetype fonts
angle = self.getFieldName(labelNode, 'angle')
if angle == "":
angle = labelNode.getElementsByTagName('angle')[0].getAttribute('value').encode('utf-8')
labelBlock += " ANGLE " + angle + "\n"
# Include label buffer if specified
# Note that the buffer has different meaning in qgis vs mapserver
# mapserver just adds blank space around the label while
# qgis uses a fill color around the label
# Note that buffer only works for truetype fonts
buffer = labelNode.getElementsByTagName('buffersize')[0].getAttribute('value').encode('utf-8')
bufferon = labelNode.getElementsByTagName('bufferenabled')[0].getAttribute('on').encode('utf-8')
buffercolor= self.getRgbFromNode(labelNode, 'buffercolor')
print buffercolor
if bufferon is not None and '1' == bufferon:
# not sure if we should use this BUFFER
#labelBlock += " BUFFER " + buffer + "\n"
labelBlock += " BACKGROUNDCOLOR " + buffercolor + "\n"
# alignment in QGis corresponds to position in MapServer
alignment = labelNode.getElementsByTagName('alignment')[0].getAttribute('value').encode('utf-8')
try:
labelBlock += " POSITION " + qgis2map_aligment2position[alignment] + "\n"
except:
# default to center if we encounter a nonsensical value
labelBlock += " POSITION cc\n"
#values from the gui:
labelBlock += " FORCE " + self.force + "\n"
labelBlock += " ANTIALIAS " + self.antialias + "\n"
labelBlock += " PARTIALS " + self.partials + "\n"
labelBlock += " END \n"
return labelBlock
else:
return ''
def getFieldName(self, parentNode, nodeName):
""" Returns the fieldname-attribute-value of a nodeName with a given parentNode
as a string surrounded by brackets ('[' and ']') or
an empty string if the fieldname-attribute does not exist."""
try:
fieldname = parentNode.getElementsByTagName(nodeName)[0].getAttribute('fieldname').encode('utf-8')
if fieldname != "":
return "[" + fieldname + "]"
else:
return ""
except:
return ""
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