selecting polygons that share XX percents from another polygon (all are in the same layer)

[krooven]

I have a layer with many overlapping polygons. I want to select / delet all polygons that another single polygon contain at least 90% (or any other value) of them.

I'm using ARCGIS 10 (can get access to other programs)

Many Thanks

[adnan0001]

go with Dissolve option ....

[krooven]

Hi

Thanks for your fast reply but the polygons are not totaly contain each other, but overlapping in some ways, I want only the ones who have at least XX percent of the polygon cover by another polygon to be select/delet.

 

Thanks

[souvik.gis]

 I want only the ones who have at least XX percent of the polygon cover by another polygon to be select/delet.

 

Thanks

cover by which means? Area or other? please specify. You can use Geodatabase topology.. Please read here: ---

http://resources.arcgis.com/en/help/main/10.1/index.html#//01mm0000000m000000

or you can follow this steps: ---

 

1 easy.. intersect and then disolve (assuming the attributes will disolve the overlaps...)

Other

• USe Unions to output complete dataset with the overlaps.
• copy to a personal GDB
• close arcmap
• open the PGDB in access
• add a field called DeleteMe.
• create a "Create table" query using totals and group by the ShapeAreaNew: round([shape_area[,4) make sure you have the Unique ID in this query(eg object ID) and select none of first/last/max/min.
• create the new table
• create a new "Update" query and joint the new table with the GIS table using the UniqueID(eg obkjectID) showing all records from the GIS table(this is a outer or inner join)
• make this query update the DeleteMe field to "Not Meeeee" where there is a relationship based on existing in the other table.
• then back to arcmap
• select by location: based on the intersection output to highlight ALL of the overlaping polygons ONLY!
• select by attributes on delete me to remove from selection "Not Meeeee"
• Done!

Or

you can download this script: ----

http://arcscripts.esri.com/details.asp?dbid=16700

[bdsmolla]

So far my understanding, you cannot do it using any single tool/action. You may need to use python and use the the following hints:

use search cursor (descending order by shape area), since you said 90% or more area contain means, your one polygon's 5-10% buffer will cover 100% contain, and selected small polygon can marge/delete with the larger one. this way the all polygon loop to solve ....

Funny, but might interest you.

[krooven]

Hi  all

 

I want to hone my question. 

 

I'm looking for tool (probaly need to use python or something) that can iterate this command/logic:

For every polygon see if it cover by (spatially, geometry overllap by) another *single* polygon in at least 90 percent of the first polygon. 

If it does then mark it in some way - thats all.

 

Thank you very much