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converting grid into polygons
| converting grid into polygons [message #2628] |
Tue, 09 August 1994 03:18 |
stephan
Messages: 3
Registered: August 1994
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Junior Member |
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Hi,
I am trying to convert a regular gridded (raster) data into polygon data.
Is there a function in IDL which takes a raster as input and a list of
polygons as output ?!?!?!
The idea behind is the following: SHADE_SURF only takes single surfaces,
but POLYSHADE can have multiple objects as input (e.g., two surface?!?).
It should be possible to shade multiple surfaces that way, if I find a
easy way to convert the raster data?
thanx, Eva
PS: I know it is not very elegant (esp. for large data sets) ....
But displaying single views, cutting them (with the Z-Buffer)
and recombing them does not show what I want.
------------------------------------------------------------ ------------
Eva-Maria Stephan email: stephan@gis.geogr.unizh.ch
Department of Geography - GIS Tel. +41 +1 257 5255
University of Zurich, Switzerland Fax. +41 +1 362 5227
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Eva-Maria Stephan stephan@gis.geogr.unizh.ch
University of Zurich tel. +41+1-257-5255
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