[Gdal-dev] Is ogr2ogr the tool to use?

[Nelson, Dean]

Frank
Here is the .prj file associated with the input file.

PROJCS["Sphere_ARC_INFO_Lambert_Azimuthal_Equal_Area",GEOGCS[
"GCS_Sphere_ARC_INFO",DATUM["D_Sphere_ARC_INFO",SPHEROID["Sphere_ARC_INFO",
6370997.0,0.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],
PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["False_Easting",0.0],
PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-100.0],PARAMETER[
"Latitude_Of_Origin",45.0],UNIT["Meter",1.0]]


This particular data is located at 
http://edc.usgs.gov/products/elevation/gtopo30/hydro/na_basins.html

Regards,
Dean Nelson

-----Original Message-----
From: Frank Warmerdam [mailto:warmerdam at pobox.com]
Sent: Tue 7/24/2007 11:37 AM
To: Nelson, Dean
Cc: gdal-dev at lists.maptools.org
Subject: Re: [Gdal-dev] Is ogr2ogr the tool to use?
 
Nelson, Dean wrote:
> Hello,
> I am trying to convert the Hydro1k basin shapefiles from a "projected" 
> shapefile to a Lat/Lon shape file. I am doing that with the command:
>  
> ogr2ogr -t_srs WGS84 -f "ESRI Shapefile" outfile.shp infile.shp
>  
> But when the shapefile is viewed, it shows up about 17km north of the 
> correct data. SO the questions are:
>  
> 1. Is this the best tool to do that with?
> 2. Did I do it right?
> 3. Is there a way to offset the data in ogr2ogr?

Dean,

Could you post the .prj file associated with the input shapefile?
Ogr2ogr is an appropriate tool for the job, but there are issues
with how spherical projections are converted WGS84 that may be coming
into play.  Or it might be something else.  Having the input .prj
would be helpful to determine what the issue is.

Best regards,
-- 
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