[Gdal-dev] California/CASIL's NAD27 DRGs

[Quinn Hart]

Tugrul,

As a testimonial, CaSIL uses GDAL as our primary tool for manipulating
our data products, (although the new NAD83 drgs were contributed by Ca
Fish and Game).  You add the following file to your shared proj
directory, /usr/share/proj for debian, to get somewhat better support
for CaSIL's Albers projection.  Then you can do reprojections like:

ogr2ogr -t_srs '+init=casil:2' foo.shp bar.shp

/usr/share/proj/casil
#
PROJCS["Custom",GEOGCS["GCS_North_American_1927",DATUM["D_North_American_1927",SPHEROID["Clarke_1866",6378206.4,294.9786982]],PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",-4000000],PARAMETER["Central_Meridian",-120],PARAMETER["Standard_Parallel_1",34],PARAMETER["Standard_Parallel_2",40.5],UNIT["Meter",1]]
<1> +proj=aea +lat_1=34.00 +lat_2=40.50 +lat_0=0.00 +lon_0=-120.00
+x_0=0.000 +y_0=-4000000.000 +ellps=clrk66 +units=m +datum=NAD27 no_defs
<>
# 
PROJCS["Custom",GEOGCS["NAD83",DATUM["North_American_Datum_1983",SPHEROID["GRS 1980",6378137,298.257222101]],PRIMEM["Greenwich",0],UNIT["degree",0.0174532925199433]],PROJECTION["Albers"],PARAMETER["False_Easting",0],PARAMETER["False_Northing",-4000000],PARAMETER["Central_Meridian",-120],PARAMETER["Standard_Parallel_1",34],PARAMETER["Standard_Parallel_2",40.5],UNIT["Meter",1]]
<2> +proj=aea +lat_1=34.00 +lat_2=40.50 +lat_0=0.00 +lon_0=-120.00
+x_0=0.000 +y_0=-4000000.000 +ellps=GRS80 +units=m +datum=NAD83 no_defs
<>

On Fri, 2004-07-09 at 10:59, Tugrul Galatali wrote:
> On Fri, 2004-07-09 at 13:28, Ed McNierney wrote:
> > Tugrul -
> > 
> > Is your PROJ installation set up to include datum-shift support
> > (assuming you're trying to go to NAD83 UTM)?  
> 
> 	I was using the stock debian package. After feeling a bit silly for not
> checking the Proj4 faq, I rebuilt it per the instructions there and
> things appear to be working now.
> 
> 	Thanks for the quick reponse.
> 
> 	Tugrul Galatali
> 
> 
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-- 
Quinn Hart <qjhart at ucdavis.edu>
University of California, Davis