This content has been marked as final. Show 4 replies
I'm assuming this is a typical landcover layer. Here are the steps I use:
1) Make a layer of only forest, using the reclassify tool to make forest classes have a value of "1" and everything else a value of "NoData."
2) With the forest only layer, use the region group tool to make contiguous forest patches. The resulting layer will have a value that means nothing (just a group number), but the COUNT field will tell you how many pixels are in each group.
3) Use the Lookup tool (Spatial Analyst Tool > Reclass) to make a new raster where the value comes from the COUNT field, and multiply this by the appropriate conversion (0.222 for 30 m pixel) to get the number of acres of each patch.
Hope this helps,
Thank you so much! This was exactly what I needed to know.
This model isn't taking into consideration of topography, right?
I am attempting to use this same approach to map contiguous areas, but the region group tool is creating too many groups--there are areas I would group together that the tool doesn't put together. Is there any way to make it more inclusive? You can only choose a "neighborhood" of 4 or 8 cells.
Also, when I used the Lookup tool on my raster layer, it produced a strange layer of just lines.