[gdal-dev] Help with Maine state plane US feet

[Jamie Adams]

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 <Michael.Smith at maine.gov>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
>
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