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Thanks for the reply. I got about halfway through then when I stumbled upon another method that worked as well, using the standalone program Geospatial Modelling Environment. There is a tool called isectpolyrast which does just this: calculates the amount of area (or proportion of area) of values in the raster that occupy the extent of the polygons. It worked like a charm for this and had the added bonus of writing the results as attributes in the original buffer shape file.
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12-18-2013
05:10 AM
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I'm trying to calculate "landcover" ??? the percentage/proportion of various habitat types (Landcover shape file) that fall within the boundaries of various location buffers (a separate shape file). I realize I can do this by clipping the landcover layer to each buffer and calculating the geometry/area of the habitat fields in the newly clipped landcover area layers to arrive at a proportion of cover for each buffer, but as I have over 550 buffers this would be incredibly time consuming. Is there a more automated way I can achieve this? Thank you
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12-17-2013
01:55 AM
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Thanks for the help. As one of my layers was a raster, the Spatial Join Tool didn't work. But Tim's tip did point me in the direction of another method that did the trick: Extract Values to Table. In fact this was a bit preferred since I could copy and past out of the new table into a summary spreadsheet. I have to do this with another two layers that are both vector this time, so hopefully the Spatial Join Tool works for me. Thanks again.
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12-14-2013
04:51 AM
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Hi folks, I have shapefile of about 500 individual point locations that are the focus of my study. I also have a couple layers (both raster and vector) of things like Slope, Aspect, and landcover etc and I'm trying to figure out a way to get the associated data from those layers for each of my 500 points. For instance, what is the slope, aspect, and landcover at Point 1, at Point 2, at Point 3, etc. When I previously did this for a very small data set I simply went around and used the Identify feature to see what the values were for the other layers at each point, but with 500 points, this is obviously not very efficient. Is there is a way that I can do this? I just need to get the associated data and don't necessarily have to have it join or added to the attributes if exporting a table would work as well. Thanks for the help.
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12-09-2013
05:04 AM
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