Hi.

I have over 10 000 polylines spread over 430 polygons. For each polygon I have summarized the length of all polylines within the polygon. Now I would like to extend the sum to all polylines within the center polygon and its neighbor polygons. That is: if polygon 1 is neighbor with polygon 2, 3 and 4, I like to find the sum of all polylines within the polygons 1,2,3 and 4. I hope to do this for all 430 polygons, so I need a tool to help me.

Do anyone know how to do this?

Any help would be great=)

Thanks.

I have over 10 000 polylines spread over 430 polygons. For each polygon I have summarized the length of all polylines within the polygon. Now I would like to extend the sum to all polylines within the center polygon and its neighbor polygons. That is: if polygon 1 is neighbor with polygon 2, 3 and 4, I like to find the sum of all polylines within the polygons 1,2,3 and 4. I hope to do this for all 430 polygons, so I need a tool to help me.

Do anyone know how to do this?

Any help would be great=)

Thanks.

There are a few ways of determning adjacency in ArcGIS that I use:

1. Use a SelectByLocation to select polygons that touch/intersecct/share line segment with/etc.

2. Use the PolygonToLine tool. The output lines will have fields indicating the OBJECTID of the polygon to the right and left of the arc... I mean line (just like a good ole' coverage .aat)!