12/26/18 - The following counties have been updated using a variety of aerial photography: Rolette, Pierce, Benson, Towner, Ramsey, cavalier, Pembina, Walsh, Nelson, Grand Forks, Golden Valley, Billings, McKenzie, Dunn, Mercer, Oliver, McLean, Sheridan, Burleigh, Emmons, Logan, McIntosh, Lamoure, Dickey, Ransom, Sargent, Richland, Divide, Williams, Burke, Mountrail, Renville, Ward, Bottineau, McHenry, Wells, Kidder, and Cass

7/15/14 - updated include: Traill, Barnes, Stutsman, Kidder, Bowman, Slope, Stark, Hettinger, Adams, Grant, Sioux and Morton. These datasets were updated using a combination of the available NAIP aerials, the DES aerials, and by car within the insets.

4/30/13 - Cultural points have been updated for the following counties: Divide, Williams, Mountrail, Burke, Renville, Ward, McHenry, Bottineau, Wells, Kidder, Stutsman, Foster, Eddy, Griggs, Barnes, Cass, Steele, and Traill Counties.

6/24/10 - We have now incorporated survey points into culture points. They are used to show section corners and ¼ corners within the city maps. The counties of Emmons, Logan, McIntosh, LaMoure, Dickey, Ransom, Sargent and Richland were updated this past year

6/18/09 - Updated culture points from aerial observation and photo interpretation using 2003, 2005, 2006 NAIP photos and 2008 photography from Designs camera. Counties updated were Golden Valley, Billings, McKenzie, Dunn, Mercer, Oliver, McLean, Sheridan and Burleigh. Oil well information was updated from a shapefile provided from the Oil and Gas Division. Observations were performed by Steven Nelson.

2/13/07 - Updated via 2004 NAIP photos: Barnes, Cass, Eddy, Foster, Griggs, Kidder, Steele, Stutsman, Traill, Wells This data came from the NDDOT's Mapping Section. The original data was digitized from hand scribed maps and registered to the 1:24000 USGS PLSS data. The digitized data is maintained in individual county tiles. These tiles were appended together to make a singe state wide coverage. It was then converted from a projection (NAD 1983 UTM Zone 14N) to a Geographic coordinate system.