Boundary Solutions releases Digital Parcel Map Accuracy survey results

According to Boundary Solutions, digital parcel map geographic accuracy has significantly improved over the past two years.

This finding is based on 808 records in the National ParcelMap Data Portal (NPDP) Metadata Profile database representing 88 million parcels. Reported map accuracy ratings provided by these 808 data sponsors are trending toward greater accuracy. The total percentage of parcels with 1- to 6-foot accuracy has increased across the board, while the percentages of parcels with an accuracy rating of 10 feet plus has significantly decreased since 2005. This is true whether measured in terms of accuracy by total counties or total parcels.

This shift is due to the accuracy of the NPDP updating process, where maps of poor accuracy are continually being updated with more accurate map data. These findings show that digital parcel map database managers nationwide are truly working to establish and improve the excellence of this vital GIS data layer.

Boundary Solutions has assembled an extensive database of parcel map data available from jurisdictions throughout the United States. As of March 2006, a total of 51 million parcels from 405 jurisdictions are normalized and ready for download.

Source: http://www.boundarysolutions.com/