GRASS Contributions

As the pre-eminent OpenSource raster GIS, I am interested in contributing to GRASS when it is convenient to do so, primarily related to my data translation work.

In addition to the shape related work, I am also interested in making the TIFF tools GeoTIFF aware, and perhaps work related to projections support in GRASS.

v.in.shape

I have removed my v.in.shape code, because the copy checked into GRASS CVS is much more up to date. Last I saw it was in grass/src/mapdev/v.in.shape.

r.in.gdal

This is a raster import program based on my Geospatial Data Abstraction Library (GDAL). It supports import of a wide variety of raster file formats, including many variations on GeoTIFF.

The current implementation uses dynamic loading of libgdal.1.1.so using dlopen(), so as to avoid depending on linking against GDAL explicitly. Integer and floating point rasters are supported; as well as importing the georeferenced bounds. The current source is now in CVS (in src/raster/r.in.gdal), so fetch from there to get the most recent. To make it work you will need a built libgdal.1.1.so, such as one of those listed below.

libgdal115-linux-grass.tar.gz - GDAL 1.1.5 for Linux.
libgdal115-solaris-grass.tar.gz - GDAL 1.1.5 for Solaris 2.7.
libgdal115-irix-grass.tar.gz - GDAL 1.1.5 for IRIX 6.5.
libgdal115x-macosx-grass.tar.gz - GDAL 1.1.4.? for MacOS X.
r.in.gdal.tar.gz: Source tarball (see up to date code in GRASS CVS).
r.in.gdal HTML documentation.

When building GDAL for use with GRASS the following options are suggested. They minimize dependencies on external shared libraries, and avoid some stuff of no use to GDAL.

./configure --with-grass=no --with-png=internal --with-jpeg=internal 
            --with-gif=internal --with-libtiff=internal 
            --with-geotiff=internal --with-libz=internal --without-ogr
            --without-pg --without-ogdi

Standalone GRASS Library

The libgrass package consists of the majority of the GRASS libgis, and libdatetime library build as a standalone shared library suitable for use by non-GRASS applications wishing to read and write GRASS databases. Some additional functions have been added to simplify library initialization and data access by non-GRASS applications.

While libgrass is currently only suitable for accessing GRASS raster cells, and associated support files, it is hoped that future revisions will include support for vector files, and other data elements stored within the GRASS database.

README: General notes on package.
libgrass5-1.0.0.tar.gz: Preliminary version based on GRASS 5 (mid Oct/2001).
OSSIM Project Page
RPMs are available for some platforms from here or here.

Sample GRASS Data In Different Projections

I generated locations in a bunch of different projections using r.in.gdal from the "pci_eg" sample GeoTIFF files for testing my projections handling. Each projection is it's own location. A location like proj_tm has a single raster cell in the PERMANENT mapset called proj_tm as well. The projection parameters are in the PROJ_INFO file, and the listgeo output for the original file can be found in the tm.lgo file in the PERMANENT mapset.

grass_projdata.tar.gz: 3.1MB