How to delineate forest sections/patches from connected polygons or raster

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06-26-2018 11:14 AM
LillianCollins
New Contributor

I have a polygon of forested area in nature preserves in one county. The forested areas are sometimes connected by only one cell and I would like to create smaller sections/patches of forest from the large polygon while getting rid of these cells or assigning it to one of the patches created. I attached a photo and you can see where large areas are only connected by one cell. I could probably manually create these sections but I was wondering if there was a better way. Is there a way to delineate or create different patches in the polygon so there are separated sections of forest? I also have a raster layer that I could work with if there is a better way using a raster. Thanks!

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DanPatterson_Retired
MVP Esteemed Contributor

lots of ways... but try this first to see if it gets rid of the fiddly-bits

Shrink (by 1 or 2 cells) …

 Shrink—Help | ArcGIS Desktop 

then Expand (by the same amount you used in Shrink)

 Expand—Help | ArcGIS Desktop 

and if you don't like that, you should have a look at...

An overview of the Generalization toolset—Help | ArcGIS Desktop 

with things like

Majority filter, boundary clean, nibble, etc etc