Process includes
<OL>
<LI>air photo interpretation and transfer to mylar </LI>
<LI>scan mylar </LI>
<LI>georeference scanned image (6 to 8 control points) </LI>
<LI>vectorize the georeferenced image</LI>
<LI>clean coverage and build topology</LI>
<LI>label spatial features </LI>
<LI>quality check, proof-reading</LI>
</OL>