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13pt"><p>Hi Peppe,</p><p>Thank you for the detailed answer.</p><p>Indeed, I was
not trying to do something useful, just checking if I did not introduce a new
bug in RasterImageLayer.</p><p>I perfectly understand that applying this tool
to a raster containing floating point values is not the normal use case. With
such images, it would probably need an additional parameter to define intervals
and include all pixels belonging to a same interval in the same
polygon.</p><p>I just would like to avoid IndexArrayOutOfBoundException. There
are probably many options : deactivate plugin for this kind of image, intercept
the exception to provide a more informative message, try to make the plugin
more robust, map the floating point values to a reasonable set of integer
values... Let's try to choose something easy so that we can release 1.16
soon.</p><p>Anyway, your explanations about the two options will surely
interest everyone trying to do something useful with this plugin. Can it be
retrieved from the wiki ?</p><p>Michaël </p><blockquote type="cite"><p
style="font-family: Arial,Helvetica,sans-serif; font-size: 14px;"><strong
style="color: #000;">envoyé :</strong> <span style="color: #666;">10 novembre
2020 à 15:16</span><br><strong style="color: #000;">de :</strong> <span
style="color: #666;">Giuseppe Aruta
<ma15...@users.sourceforge.net></span><br><strong style="color: #000;">à
:</strong> <span style="color: #666;">"[jump-pilot:bugs] "
<5...@bugs.jump-pilot.p.re.sourceforge.net></span><br><strong style="color:
#000;">objet :</strong> <span style="color: #666;">[jump-pilot:bugs] #510
Create Polygon From a Raster bug</span></p><br><div
class="ox-fb9f630670-markdown_content"><p>Hi Michael,<br> ...even the time to
vectorialize a raster with continuous data like DTM084 is incredibly
long...<br> In theory in mostly case an user chooses one of Raster->Vector tool
according to the type of the raster she/he wants to convert:<br> a) a
continuous raster like a DTM. Data are scattered in a continuous interval
descibing a measure that gradually changes, for instance the elevation or a map
of temperatures. An user wonts to convert into a contour lines (Raster to
contours) or trasform into a discrete raster (eg. defining intervals of the
measure: 10-30% slope, 31-50% slope and so on<br> a) a discrete raster can be
converted to a polygon layer (the case of Raster to Polygons. See file
UsoSuolo.tif by Roberto: each number with 3 digits (512, 111, etc) define a
unique usage of the soil (forsets, cultivar, urban, etc). There is neither no
uniform measurement (a forest is different from a city) nor a continuous
gradually change (after 111 there would be a 231 in the scale, for instance):
we use number because we get advance (and the limit) that the Z value of a
raster accept only a number (float, double, integer or whatever, but only a
number not a string).<br> Of coarse, if we consider the limit of the interval
and the cell size, all the raster are tecnically discrete (each output polygon
can have a size of the cell size: see Stefan's tools, create a grid of
points/of polygons).<br> When I added this plugin to OpenJUMP I wanted to
bypass in one time two problems:<br> a) Sextante Raster to Vector tool on
discrete raster sometimes was giving wierd results: island of no data where it
was supposed to have valid data<br> b) the version of Raster to Polygon tool in
OpenKLEM, derived from AdbToolbox software, was taking a longer time and giving
sometimes a strange outputs (like sometimes self intersection polygons).<br>
This plugin seems to solve both situations. OpenKLEM now refers to
VectorizeAlgorithm class, part AdbToolbox. While embedded OpenJUMP plugin can
use both algorithm. They both work, except if user wants to convert a
continuous raster to polygons with AdbToolbox.<br> I will give a look and atry
to correct or to add some type of check, studing a way to distinguish in
OpenJUMP a continuous vs discrete raster, not sure if it possible (an histogram
is required and OJ raster histogram plugin can take a very long time according
the intervals.</p><p>Best regards<br> Peppe</p><hr><p><strong> <a
class="ox-fb9f630670-alink"
href="https://sourceforge.net/p/jump-pilot/bugs/510/";>[bugs:#510]</a> Create
Polygon From a Raster bug</strong></p><p><strong>Status:</strong> open<br>
<strong>Milestone:</strong> OJ_1.16<br> <strong>Created:</strong> Tue Nov 10,
2020 12:59 PM UTC by michael michaud<br> <strong>Last Updated:</strong> Tue Nov
10, 2020 12:59 PM UTC<br> <strong>Owner:</strong> nobody</p><p>The plugin has
two modes : AdbToolbox and Sextante. With tiff images of type float like DTM084
from Roberto Rossi, I can vectorize with Sextante, but Adb throws en exception
:<br> java.lang.ArrayIndexOutOfBoundsException: Index -9999 out of bounds for
length 1925123<br> at
org.openjump.core.rasterimage.algorithms.VectorizeAlgorithm.toPolygonsAdbToolBox(VectorizeAlgorithm.java:113)<br>
at
org.openjump.core.ui.plugin.raster.VectorizeToPolygonsPlugIn.run(VectorizeToPolygonsPlugIn.java:170)<br>
at
com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$TaskWrapper.run(TaskMonitorManager.java:151)</p><hr><p>Sent
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** [bugs:#510] Create Polygon From a Raster bug**
**Status:** open
**Milestone:** OJ_1.16
**Created:** Tue Nov 10, 2020 12:59 PM UTC by michael michaud
**Last Updated:** Tue Nov 10, 2020 02:16 PM UTC
**Owner:** nobody
The plugin has two modes : AdbToolbox and Sextante. With tiff images of type
float like DTM084 from Roberto Rossi, I can vectorize with Sextante, but Adb
throws en exception :
java.lang.ArrayIndexOutOfBoundsException: Index -9999 out of bounds for length
1925123
at
org.openjump.core.rasterimage.algorithms.VectorizeAlgorithm.toPolygonsAdbToolBox(VectorizeAlgorithm.java:113)
at
org.openjump.core.ui.plugin.raster.VectorizeToPolygonsPlugIn.run(VectorizeToPolygonsPlugIn.java:170)
at
com.vividsolutions.jump.workbench.ui.task.TaskMonitorManager$TaskWrapper.run(TaskMonitorManager.java:151)
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