How was the aerial imagery collected?
The City’s most current imagery is from 2009 and was collected as a part of the Virginia Base Mapping Program (VBMP) Orthophotography project ( The Commonwealth of Virginia contracted with the Sanborn Map Company to provide 200 scale, one-foot pixel resolution, and natural color orthophotography to the Virginia Geographic Information Network (VGIN). Updates to imagery are dependent on the state’s acquisition schedule.

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1. How was the aerial imagery collected?
2. What is orthophotography?
3. How was the impervious data collected?
4. What if my home or building was built or significantly changed after 2009?
5. Why does the impervious layer not exactly match up with the imagery layer?