This is a 2 part challenge. 1. First I need to identify all houses that are greater than a specified distance from selected stores as traveled by road (not a buffer around the stores which provides an "as the crow flies" distance).
2. Once these houses are identified, I need to aggregate them into polygons. A problem I foresee in this step is there may be individual houses (or very small clusters of houses) that are greater than the specified distance, but surrounded by houses that fall within the distance boundary. These need to be dealt with separately when creating the polygons. The polygons in this case will represent unserviced regions.
First off, how do I identify all points beyond, say, a 10 mile distance along the roads.
I'm using ArcGIS 10.0, and have Spatial Analyst and Network Analyst available.