Select your product to confirm this information applies to you
Setup User Grid for Position Format
The User Grid position format option should only be used when the other position format options available on Garmin outdoor devices do not match what is on the map. For example the various State Plane coordinate systems specific to states in the U.S. are not listed as options. For a list of available position format options on the Garmin outdoor handhelds, see- Position Formats Supported by Garmin Outdoor Devices.
To review how to change the position format on the Garmin review your owner's manual.
Setting up a User Grid
Select User Grid for position format.
Enter an originating Longitude coordinate, which can be found on the paper map.
Enter a scale from the paper map.
Enter a false easting's and false northing's from the paper map. If these are not available, contact the map maker for this information.
Select User for map datum.
Enter the DX, DY, DZ, DA, and DF. The mapmaker will need to be contacted for this information.
The device will now have a grid system that matches the paper map.
Setting up a Custom User Grid for State Plane Coordinate Systems
The latitude and longitude of origin fields on a Garmin outdoor device are in the decimal minutes format. State Plane coordinate systems typically are given in degrees decimal format. To use a Sate plane coordinate system on a Garmin outdoor device the coorindates must be converted to the correct format before entering them on the device.
NOTE: Garmin does not offer a coordinate conversion tool. For support of third-party coordinate conversion tools, contact the manufacturer of the program.
Converting False Northing Parameters
State Plane coordinates provide False Northing parameters. These paramaters must be converted to be accepted by Garmin outdoor devices.
General steps are provided below, which are intended for advanced users. More specific steps on changing map datum, position format, and other related settings on your device can be found in your owner's manual.
Set the device Map Datum to NAD83.
Set the device position format to hddd°mm'ss.s".
Mark a waypoint for the origin latitude and longitude at the natural origin of the state plane user grid. This information is typically found within the map's legend. Note that State Plane Coordinates must be converted from decimal degrees to decimal minutes.
Example: For Nevada East NAD83, you would mark a waypoint at Latitude: 34°45 Longitude: -115°35
On the device, change the position format to User Grid.
Select a Grid Projection.
Enter the User Grid parameters of the State Plane map
False Easting (enter the actual value)
False Northing (enter only 0's)
Scale
Longitude and Latitude of natural origin (in decimal minutes)
Return to Waypoint Manager.
Select the original waypoint marked in step 3.
Use the following calculations and write down the Northing value of the waypoint:
-(Negative Northing value of the waypoint) + (Northing value of the User Grid)
Example: For Nevada East -04775983 + 8000000 = 3224017
On the device, change the User Grid with the new False Northing value from the calculation.
Return to Waypoint Manager.
Select the waypoint again to verify the correct position.
The waypoints Northing value should now indicate the False Northing value of the State Plane User Grid parameter.