[gdal-dev] enable GEOS support (GDAL/OGR 1.7.1; GEOS 2.3.0; VB.NET)

[Tamas Szekeres]

Hi,

You might wan't to make a test with the packages available at:
http://vbkto.dyndns.org/sdk/

All of those gave geos support compiled in.

By downloading the SDK pacakges your could also compile gdal by yourself
easily using a VS Command Prompt and type 'nmake gdal' in the SDK root
directory.

Best regards,

Tamas


2010/3/5 <toefftoeff1 at gmx.net>

> Hello,
>
> I would like to build and use OGR with GEOS support on Windows XP 32 bit
> using
> Visual Basic.NET (.NET framework 2.0 or 3.5).
>
> GDAL/OGR 1.7.1 and GEOS 2.3.0 compilation seem to work fine (using
> nmake, Visual Studio 2008, only
> warnings, no error messages).
>
> I used the following GDAL/OGR nmake.opt settings to include GEOMS support:
>
> # Uncomment for GEOS support
> GEOS_DIR=D:\svn\code\Tools\geos-3.2.0
> GEOS_CFLAGS = -I$(GEOS_DIR)/capi -I$(GEOS_DIR)/source/headers -DHAVE_GEOS
> GEOS_LIB     = $(GEOS_DIR)/build/msvc90/Release/geos_c_i.lib
>
> But using GEOMS in a sample .NET project always results in an exception
> "GEOS support not enabled".
>
> Sample code:
>
>            Ogr.RegisterAll()
>
>            Dim g1 As Geometry = Geometry.CreateFromWkt("POLYGON((0 0,
> 10 10, 10 0, 0 0))")
>            Dim g2 As Geometry = Geometry.CreateFromWkt("POLYGON((-90
> -90, -90 90, 190 -90, -90 -90))")
>
>            Dim result As Boolean = g2.Contains(g1)
>
> I copied all GDAL/OGR wrapper libraries and geos_c.dll to the
> appropriate places.
>
> Any suggestions?
>
> Thanks a lot...
>
>  Christoph
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> gdal-dev at lists.osgeo.org
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>
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