I am looking to dissolve a large shapefile. I have successfully implemented to code found on code.thinkgeo.com, however calling MultipolygonShape shp = PolygonShape.Union(areaShapeCollection) is very slow, sometimes taking up to a minute an a half. I think the reason for this is my BaseAreaShapes are multipolygons, some of them containing tens of thousands of polygons, so there is a lot of processing to do. I was just wondering if there was anything I can do on my end to make this process execute quicker?
Thanks for your time and help.
.Ryan.