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Converting ascii data to contour using spatial analyst

Question asked by Nick_Dundee on Oct 16, 2016
Latest reply on Oct 16, 2016 by Dan_Patterson



I'm trying to convert ascii data to a contour shape file, so it can be used in CAD. 


I've manage to do this using the contour function in Spatial Analyst. However, the resulting file if enormous, around 2GB. This is from an ascii file that was around 120MB. I would be very grateful if someone could tell me how to convert it without resulting in a such a large shape file - something that was around the same size as the ascii would be more manageable. I'm confused as to why the resulting shape file is so large, so any explanations of that would be equally appreciated! 


Many thanks,