lookup_permits.RdLook up permits
lookup_permits(polys, lots, permits)
| polys | is a spatial polygons object (sampling boxes)  | 
    
|---|---|
| lots | is a spatial polygons object (taxlots)  | 
    
| permits | is a csv file with cols(maptaxlot, record_no)  | 
    
a character vector listing permit record numbers for taxlots in polys