[Proj] cs2cs and Visual Basic .NET

Jim Mace jmace at benchmarkrs.com
Sat May 12 14:32:32 EDT 2007

I am doing something somewhat similar using ogr2ogr to convert shapedfiles
from one projection to another from the command line.  I am using C#, but
you should be able to easily convert this to VB.net without much trouble.
Among other things the GeoSpatial class contains the proj strings that I use
to convert points from one projection, spatial reference to the other.  They
are represented by the enumerators EPGS.Albers and EPGS.Mercator.  There's
also another one that I use, EPGS.WGS84.  This is verifiable code, so the
conversions work correctly.  I am using SharpMap to display the shapefile on
top of Virtual Earth, and everything lines up correctly.

String oldFilePath = @"C:\farsite4\examples\ashley\Output\ash1_perim2.shp";
String newFilePath =

GeoSpatial spatial = new GeoSpatial();
ProcessStartInfo psi = new ProcessStartInfo(@"C:\Program
	" -s_srs \"" +spatial.GetEPGS(GeoSpatial.EPGS.Albers)+ "\" -t_srs
\"" 	+ spatial.GetEPGS(GeoSpatial.EPGS.Mercator)+ "\" "+ newFilePath + "
" 	+ oldFilePath);


I hope this helps...


-----Original Message-----
From: proj-bounces at lists.maptools.org
[mailto:proj-bounces at lists.maptools.org] On Behalf Of Tamas Szekeres
Sent: Saturday, May 12, 2007 11:17 AM
To: PROJ.4 and general Projections Discussions
Subject: Re: [Proj] cs2cs and Visual Basic .NET

If you want to use cs2cs exterally, you might use the
System.Diagnostics.Process to spawn cs2cs in your application.

If you want to implement similar functionality internally you might
use the SpatialReference and GeoTransformation classes from the
GDAL/OGR .NET API. You might add a reference to ogr_csharp.dll or
osr_csharp.dll in your application.
The FWTools package contains the binaries for using this functionality.

Best regards,

Tamas Szekeres

2007/5/12, Leonidas <leonidas_liakos at yahoo.gr>:
> How can I use cs2cs in my Visual Basic .NET?
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