Calculating area of polygon per slope category

Discussion created by galb on Aug 4, 2011
Latest reply on Aug 8, 2011 by dhoneycutt-esristaff

I'm after opinions on the best way to achieve the following task. Opinions diverge as to whether raster or vector processing is most efficient for large datasets.

Input A:
vector dataset containing several slope categories (eg 1-6)

Input B:
vector land parcels or vector erosion zones; can contain over 500'000 features

Output required:
Area in m2 per slope category within each polygon in input B (output als statistics per polygon sufficient)

Other factors:
Performance should be optimized for handling large datasets/regions.
Software: ArcGIS 10, ArcInfo, incl. spatial analyst; FME

- does someone have experience of this kind of processing?
- which tools re suited to the task/would you recommend?
- comparison of using vector or raster geoprocessing?

Any tips/hints welcome!