NTRIP/RTK Network Access by State

Below is a list of RTK Networks available state-by-state.  In some cases we have included instructions on signing up and connecting to a particular network.  While there may be multiple GNSS networks in a state, we will only mention state run networks in cases where they are available.  Otherwise we'll either mention PointOne Polaris network, or SmartNet which both cover nearly the entire USA.

PointOne - In its current state the PointOne network is a single baseline network.  This means that your rover will receive corrections from one base station.  This is ideal when the base station is close to the rover, but typically more error is introduced the further from a base station that your rover is.  For instance, on the Reach RS3 the estimated error 1 cm for every 10 km between the base and rover.  

SmartNet, SpiderNet and Trimble Pivot networks can connect to single base stations, or they can connect to a network or VRS mount point.  In that case multiple base stations are used and virtual base station sends corrections to your rover.  This can mitigate some errors caused with a long distance between the base and rover.  For instance if you are within a 5 mile radius of a base station, you likely will favor connecting to that base station, but as you move further away, a virtual base station will start to become more reliable. 

SmartNet also has a PPP tool which can work out better than OPUS because it uses more constellations.   

Alabama - AL CORS available for free, a SpiderNet network.

Alaska - Some coverage of the state by PointOne and SmartNet.

Arizona - PointOne or SmartNet.

Arkansas - ARDOT RTN available for free, a Pivot network.  

California - CRTN available for free, a single baseline network.  May need to supplement with PointOne or SmartNet.

Colorado - CRTN available for free, a single baseline network.  May need to supplement with PointOne or SmartNet.

Connecticut - ACORN available for free, a Pivot network.

Delaware - PointOne or SmartNet.

Florida - FPRN available for free, a SpiderNet network.

Georgia - PointOne or SmartNet.

Hawaii - PointOne or SmartNet.

Idaho - PointOne or SmartNet.

Illinois - PointOne or SmartNet.

Indiana - INDOT InCORS available for free, a Pivot network. 

Iowa - IaRTN available for free, a SpiderNet network.

Kansas - PointOne or SmarNet.

Kentucky - KYCORS available for free, a Pivot network.

Louisiana - PointOne or SmartNet.

Maine - MaineDOT CORS available for free, a Pivot network.

Maryland - PointOne or SmartNet.

Massachusetts - MaCORS available for free, a SpiderNet network.  

Michigan - MDOT CORS available for free, a SpiderNet network.  

Minnesota - MnCORS available for free, a Pivot network. 

Mississippi - GCGC RTN available for free, a Pivot network.

Missouri - MoDOT available for free, a Pivot network.

Montana - MTSRN available for a fee, a Pivot network.

Nebraska - PointOne or SmartNet.

Nevada - TURN GPS Network available for a fee, a Pivot network.

New Hampshire - PointOne or SmartNet.

New Jersey - PointOne or SmartNet.

New Mexico - PointOne or SmartNet.

New York - NYSNet available for free, a SpiderNet network.  

North Carolina - NC RTN available for a fee, a Pivot network.

North Dakota - PointOne or SmartNet.

Ohio - ODOT VRS available for free, a Pivot network. 

Oklahoma - PointOne or SmartNet.

Oregon - ORGN available for free, a SpiderNet network.

Pennsylvania - PointOne or SmartNet.

Rhode Island - MaCORS available for free, a SpiderNet network.

South Carolina - SCRTN available for a fee, a Pivot network.

South Dakota - PointOne or SmartNet.

Tennessee - TDOT GNSS Reference Network available for a fee.

Texas - PointOne or SmartNet.

Utah - TURN GPS for a fee.  

Vermont -  VECTOR available for free, a Pivot network.  

Virginia - PointOne or SmartNet.

Washington - WSRN avialable, a Pivot network.

West Virginia - WVRTN available for free, a Pivot network.

Wisconsin - WISCORS available for free, a SpiderNet network.

Wyoming - PointOne.