[Mapserver-users] How do I create a georeferenced tiff file...

Homme Zwaagstra hrz at geodata.soton.ac.uk
Fri May 28 04:30:41 EDT 2004

On Thu, May 27, 2004 at 01:34:34PM -0600, Zamil Murji wrote:
> Hello list,
> I've got a postgis table with approximately 500000 rows. I would like to extract that data at various scales into georeferenced tiff images. How do I do this? What programs can I use?

Not knowing the details of your data structure I can only give you an
overview of how I would approach the problem.

I can think of two options:

1. write a program to dump the database data into a raster format that
   can then be converted to geotiff using gdal_translate. An ASCII
   raster format such as the ESRI grid format would probably be the
   easiest to use.

2. write a program that accesses the database and builds the geotiff
   on the fly using the GDAL API.

Both are tasks that are most easily solved by scripting languages such
as perl or python. If going with option 2 I would consider the
excellent python interface to GDAL.

Hope that helps,

Homme Zwaagstra

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