[mapguide-users] [MGOS 2.1]Wrong coordinate system with GeoTiff files

Hardt preinhart at environcorp.com
Mon Dec 14 04:24:37 EST 2009


Hi all,

I am again fighting with rasters...

I create a dataconnection with GDAL provider, using a Geotiff from ArcGIS
9.3.1.
This GeoTIFF contains the coordinates, and when I add the newly created
layer to a map, it  detects automatically the initial map view correctly.

However, the layer is displayed in meters instead of decimal degrees.

I checked the config file from the dataconnection, and the projection is

LOCAL_CS["*XY-MT*",LOCAL_DATUM["*X-Y*",10000],UNIT["Meter",
1],AXIS["X",EAST],AXIS["Y",NORTH]]

But the GeoTIFF is supposed to be in WGS84 (for the little story, the image
is captured from Google Earth in MapWindow using the Shape2Earth plugin,
then I import it in ArcGis to export it as a GeoTIFF; ArcGIS open it with
decimal degrees, and if I open the GeoTiff in another GIS software, the
GeoTiff is detected as WGS84 too; so to me it's definitely something with
MGOS)

How can I fix this ?

Thanks,

Hardt
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