On Jul 3, 2008, at 1:40 PM, Kjell Are Refsvik wrote:
On 3. juli. 2008, at 21.36, Dane Springmeyer wrote:
Refsvik,
Try reversing your coordinates, as the graphic looks like your
output shapefile has had the x/y reversed.
Splendid! That did the trick.
great.
However - I have another dataset from the middle east, and
approaching this data the same way, even trying to reverse the
dataset from the images, it still fails:
http://www.ia-stud.hiof.no/~kjellare/misc/gdal_fail1.png
http://www.ia-stud.hiof.no/~kjellare/misc/gdal_fail2.png
I can see from the Qgis mouse coordinates in the lower right that the
shapefile you created likely has x,y coordinates in a projected
coordinate system (at least different from WGS 84/4326). My first
(wild) guess would be to add a .prj file from spatialreference.org for
a UTM zone that covers your area of the middle east (you'll be need to
find out what exact zone number is needed if it is in UTM).
I would try:
http://www.google.com/search?hl=en&q=site%3Ahttp%3A%2F%2Fspatialreference.org+utm+middle+east&btnG=Search
UTM is a likely candidate if the data came from a GPS unit, but its
just a guess.
... trying to have the dots numbered or named and outputting the two
layers as a transverse mercator projected .png file are the two
things left to do.
I would really appreciate some input on how to proceed, as I cannot
figure out if gdal_rasterize can be used for this purpose.
In Qgis you should be able to reproject to UTM and label your points.
Qgis will also export to PNG format if that is what you want. However
I don't think that Qgis will output an ESRI world file (the only way
that I know to keep a PNG spatially reference... but the application
uDIG will output a .wld world file to spatially reference a PNG).
I'd recommend #qgis or #udig with further questions.
Dane
Best regards,
Kjell Are
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