[gdal-dev] Clipping shapefiles

[Matthew Huck]

  Hi,  I've got a reasonably large shapefile that I wish to break down
into areas that match the topographic maps in NZMG. I've got a python
script that creates a shapefile with each topomap as a polygon in it
(and I can create a shapefile per topo map too if required). What I
can't work out how to do is to clip my master shapefile by the smaller
shapefiles. I've seen ideas of copying across the features if they
intersect with the clipping box, but the data is contour lines so I
want to "cut" the contour lines at the boundry of the clipping boxes.
Any ideas on the best way to do it, I can get MapWindow to do it
(sometimes, but it crashes frequently).
 Cheers
 Matthew
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