Wednesday, February 9, 2022

Updates to GTS_Aquifer Layer

The ND GIS Hub has a variety of hydrography layers, some for very specific purposes.  The GTS_Aquifers layer is one such specific layer. The GTS_Aquifer layer is created and used by scientists at the North Dakota Department of Environmental Quality (NDDEQ) to prioritize aquifer monitoring efforts in the Groundwater Protection Program. To avoid confusion, previous versions of the GTS_Aquifer layer from 1997 and 2019 will be archived in the coming weeks. After March 31, 2022, only the most recent version, GTS_Aquifers (without the year designation in the name), will be available on the hub data portal and for download. Future updates will be incorporated into that layer and not a separate layer.   

Scientists at the NDDEQ first conducted the North Dakota Geographic Targeting System for Groundwater Monitoring (GTS) in 1997 as a method of assigning monitoring priority to shallow aquifers. In 2015, NDDEQ scientists updated the aquifer priority listing in response to changing aquifer boundaries, land use, and groundwater appropriation from the state’s aquifers. The analysis was complete and first published in 2018. NDDEQ scientists published an additional update to address water levels in confined aquifers in October 2019 and placed the layer on the NDGIS Hub as “GTS_Aquifers_2019” layer. 

In January 2021, 68 new aquifers were analyzed using the GTS methodology and are also included in the GTS_Aquifer layer. Four previously existing aquifers were updated and all aquifer boundaries updated to match North Dakota Water Resources Department aquifer delineations and names as of January 2021.  Description of method used is available in the "2021 GTS Addendum" report.  The 2019 Geographic Targeting System Report is also available online here

If you have any questions about NDDEQ's data or maps, visit our website or contact Ann Fritz at  For more information about NDDEQ's Groundwater Protection Program, contact Carl Anderson at  

Wednesday, February 2, 2022

New and Updated Datasets on the GIS Hub

A number of datasets have been updated and two new ones placed on the GIS Hub by the North Dakota GIS Technical Committee data stewards.  These are:

NAIP 2021 Aerial Photography (updated, courtesy of the National Agriculture Imagery Program (NAIP), now includes web service)

State and Federal Roads (updated, courtesy of Department of Transportation)

Mile Markers (updated, courtesy of Department of Transportation)

County Roads (updated, courtesy of Department of Transportation)

Bismarck-Mandan 2020 Aerial Photography (new, courtesy of the Cities of Bismarck and Mandan)

Cass County 2021 Aerial Photography (new, courtesy of Cass County, ND)

And please don't forget about the Statewide Parcel Dataset:

  • If you are using the parcel data, please consider taking a little survey to help us understand how you are using that data
  • The data are available HERE
  • The Parcel Program website is HERE

These datasets can be downloaded and/or accessed via web-based data services.  More information on these datasets can be found on the GIS Hub Data Portal. You can search for these datasets (e.g., type in: marker) or you may find it convenient to simply locate the data by browsing through the themes.

Check out the ArcGIS Online section of Accessing Web Services and the Data Download page for help on using the GIS Hub Data Portal.