Hey Michael, Have you tried EPSG 102684? There's a esri_extra file in the FWTools/share dir that has additional definitions, including Maine Stateplane West Nad83 Feet.
Cheers, Jamie Adams On Mon, Jan 26, 2009 at 6:01 AM, Smith, Michael <[email protected]>wrote: > I am trying to work with several aerial photos which are in Maine State > Plane West, NAD83, US feet. This is a commonly-used projection in Maine > (along with Maine East), yet it is not found in the pcs.csv file that comes > with FWTools/GDAL. In fact although there are several iterations of state > plane for Maine in that file, none are in feet. > > I have hacked around a bit without success. The two EPSG codes I am trying > to add are 26847 > *http://spatialreference.org/ref/epsg/26847/*<http://spatialreference.org/ref/epsg/26847/> > and 26848 > *http://spatialreference.org/ref/epsg/26848/*<http://spatialreference.org/ref/epsg/26848/>. > I added the values below to the table based on what I saw as examples in > other entries: > > COORD_REF_SYS_CODE COORD_REF_SYS_NAME UOM_CODE > SOURCE_GEOGCRS_CODE COORD_OP_CODE COORD_OP_METHOD_CODE > SHOW_CRS DEPRECATED PARAMETER_CODE_1 > PARAMETER_VALUE_1 PARAMETER_UOM_1 PARAMETER_CODE_2 > PARAMETER_VALUE_2 PARAMETER_UOM_2 PARAMETER_CODE_3 > PARAMETER_VALUE_3 PARAMETER_UOM_3 PARAMETER_CODE_4 > PARAMETER_VALUE_4 PARAMETER_UOM_4 PARAMETER_CODE_5 > PARAMETER_VALUE_5 PARAMETER_UOM_5 > > 26847 NAD83 / Maine East (ftUS) 9003 4269 11831 9807 > 1 0 8801 43.4 9110 8802 -68.3 9110 8805 > 0.9999 9201 8806 300000 9001 8807 0 9001 > 26848 NAD83 / Maine West (ftUS) 9003 4269 11832 9807 > 1 0 8801 42.5 9110 8802 -70.1 9110 8805 > 0.999967 9201 8806 900000 9001 8807 0 9001 > > Yet when I use those EPSG codes the imagery does not align correctly (way > way off) in GIS software including ArcGIS. > > I tried two other methods, one using the PROJ4 description and secondly > using the ESRI projection file for > NAD_1983_StatePlane_Maine_West_FIPS_1802_Feet. In all cases the imagery is > way way way out of Maine. Examining the image in ArcGIS shows it is > Transverse Mercator and has the same parameters as State Plane feet, but > it's screwed up. > > Yet if I'm in ArcGIS and I assign the projection file to the image > manually, it works fine. I intend to put the imagery in MapServer WMS, so I > need to get this worked out in GDAL first. > > Any suggestions? > > ********** > Michael Smith > State GIS Manager > Maine Office of GIS > > _______________________________________________ > gdal-dev mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/gdal-dev >
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