[gdal-dev] WAsP map output for ogr

[Vincent Mora]

Hi,

I'd like to develop a ogr driver to create .map files used by WAsP
<http://en.wikipedia.org/wiki/WAsP>

The .map files contains height contours and roughness zones, the former
are linestrings with an height attribute, the later are linestrings that
separate two adjacent polygons with a roughness parameter on the righ
and left sides.

An algorithm to create roughness zones from polygons with a roughness
attribute would be useful: extract the polygon boundaries and output
linestrings with attributes on the left and right sides.

What driver would you recommend as a starting point to get the
interface, the coding style and the error handling right ?

Is the algorithm to create roughness zones from polygons (i.e. extract
polygon boundaries and add left/right attributes) something that should
be integrated in the driver, somewhere else or not at all in gdal ?

Thanks,

V.