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Combine overlapping continuous polygons into groups

I have a list of polygons each with a unique ID like below:

Point ID	SpatialObj
1	Polygon
2	Polygon
3	Polygon

I want to take any continuous overlapping polygons and combine them into 1 group and 1 combined polygon. In the below example, each colored area would be 1 row (group) with a combined polygon. So there would be 4 rows/groups in the below example.

Spatial Analysis

Accepted answers

Jonathan-Sherman

Nice question!

So i'd break this down into three main parts:

(1) Summarise all your polygons (using a summarise tool to create one full spatial object)

(2) Break summarised polygon back into detailed regions to determine individual "groups"

(3) Check for SpatialObj holes, match them back to the polygon "group" it came from and carve it out

My starting polygons:

My final "grouped" polygons:

Kind regards,

Jonathan

20211104 - CombineOverlappingPolygons.yxmd

All comments

Here is an example for you.

Best,

Fernando Vizcaino

2021-11-04 Combine overlapping continuous polygons into groups.yxmd

Jonathan-Sherman

Nice question!

So i'd break this down into three main parts:

(1) Summarise all your polygons (using a summarise tool to create one full spatial object)

(2) Break summarised polygon back into detailed regions to determine individual "groups"

(3) Check for SpatialObj holes, match them back to the polygon "group" it came from and carve it out

My starting polygons:

My final "grouped" polygons:

Kind regards,

Jonathan

20211104 - CombineOverlappingPolygons.yxmd

Leave it up to me to overcomplicate it. 🤣 This worked great, thank you!

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