Robert -
How does the Coordsys clause in your new "shape" mif/mid file looks like
? (Open the new mif file in notepad, look at line 4)
Is it the same as the Coordsys clause in the tab file for the jpg ?
Regards
Bo Victor Thomsen
Aestas-GIS
Denmark
Den 09-10-2012 10:53, BTinternet skrev:
As a non-expert newcomer to QGIS I would most grateful for the forum's
advice.
I have the task of taking TAB and JPG files created by a client in
Mapinfo and drawing on them vector items using QGIS - and then
returning the resulting SHP files (or SHP converted to Mapinfo MIF/MID
files) to the client. When I do this, however, the client declares
that, the CRS for the resulting SHP or MIF/MID files are non-existent
or wrong.
For example, Mapinfo TAB and associated JPG files was sent from my
client. If I look at the TAB file in Notepad, I see that the data are
as follows:
!table
!version 300
!charset WindowsLatin1
Definition Table
File "03sw.jpg"
Type "RASTER"
(512232,306415) (88,176) Label "Pt 1",
(517111,303237) (5484,3782) Label "Pt 2",
(512816.96000000002,303710.67999999999) (732,3234) Label "Pt 3",
(516970.09000000003,306367.07000000001) (5436,339) Label "Pt 4",
(513415.08000000002,303400.54999999999) (1389,3578) Label "Pt 5"
CoordSys Earth Projection 8, 79, "m", -2, 49, 0.9996012717, 400000,
-100000
Units "m"
When I open the JPG in QGIS, I see that the CRS for the JPG is 'User
Defined' and has the following definition:
+proj=tmerc +lat_0=49 +lon_0=-2 +k=0.9996012717 +x_0=400000
+y_0=-100000 +ellps=airy +towgs84=375,-111,431,-0,-0,-0,0 +units=m
+no_defs
/*At this point, I'm not too sure whether or not QGIS has correctly
interpreted the CRS for the Client's JPG. Can anyone help me on this
please?*/
When I create a SHP vector layer on top of the JPG, I make sure that
it has the same 'User Defined' CRS as above and save the SHP layer as
Mapinfo-useable MIF and MID files. Looking at the MIF file in
Notepad, I can see that the coordinates (shown bottom right in QGIS)
of the vector file agree exactly with the original JPG raster.
When the MIF/MID files are opened by my Client however, the files are
unusable because the CRS is 'non-existent or wrong'
*Can anyone point out where I'm going wrong please?*
Best regards
Robert Beasley
_______________________________________________
Qgis-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/qgis-user
_______________________________________________
Qgis-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/qgis-user
