I would like to create a fire frequency map in ArcGIS showing the areas which have burnt 1, 2, 3 times etc (overlapping areas). Currently I have years from 2000 to 2014 of burnt area MODIS data which I have converted into polygons but I'm really struggling to figure out how to do this

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    You really need to ask a more specific question – JamesRyan Dec 16 '14 at 11:48
  • What is not specific enough? I would like to create a map showing the number of times an area has burnt. How do I go about doing that with the polygon layers I have of each year (2000-2014). I need to know the process which will help me create overlapped areas and the times they experienced it (frequency) – user42997 Dec 16 '14 at 11:55
  • gis.stackexchange.com/questions/71312/… < this is the exact same question but it hasn't been answered – user42997 Dec 16 '14 at 11:56
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    by the way, a global raster layer of fire frequency can be downloaded there maps.elie.ucl.ac.be/CCI/viewer – radouxju Dec 16 '14 at 14:55
  • See a previous answer of mine: gis.stackexchange.com/a/119450/8104. All you need to do is adjust the symbology after running the count polygons tool. – Aaron Oct 19 '15 at 1:00

There is also the tool "feature to polygons" which will take overlapping polygons and create "flat" polygons from that, which can then be used with their centroid points and a spatial join to the stacked, original polygons to count the number of occurences.

The blog post at http://blogs.esri.com/esri/arcgis/2012/11/13/spaghetti_and_meatballs/ describes this method.


Look at the Overlay toolset, see which works best for you.

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