I have line data that has been symbolozied in ways that I don't have time to understand and would like to make a map that tells me =).
My general question is how to display the lack of data results for queries. I have a bunch of layer files that were built with a bunch of def queries in ArcMap. I will iterate over the line data and for each unique line check for results of applying a def query. If results are returned, a new layer file is created representing that query.
I want to highlight the queries that didn't return results in a silverlight app. So I have all the queries that returned zero records in a database.
I'll be making this map with silverlight but any solid cartography concepts for getting at what's not there are welcome.