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State reference table
Emlid · GNSS Basics
Coordinate System Selection by State
Horizontal system
When no specific system is requested and you're not comparing against an existing dataset, select the state plane zone for your location. In Emlid Flow this appears as NAD83(2011) / [State] [Zone]. Use the ArcGIS state plane tool to find your zone.
Vertical system
The most common vertical system is orthometric height with the latest geoid (Geoid 18). In Emlid Flow this corresponds to NAVD88 height.
Units
Most states use US survey feet. Some use international feet. Selecting the wrong one can result in several feet of error — check the table below for your state.
Wrong system selected?
Don't worry — you can always convert from one coordinate system to another after the fact. Some states also use county-based systems; check locally if state plane isn't specified.
For video tutorials on coordinate systems, localization, and more, visit our video tutorials page.
State reference table
| State | Coordinate system | Units |
|---|---|---|
| Alabama | NAD83(2011) / Alabama (East/West) | US survey feet |
| Alaska | NAD83(2011) / Alaska (zone 1–10) | International feet |
| Arizona | NAD83(2011) / Arizona (East/Central/West) | International feet |
| Arkansas | NAD83(2011) / Arkansas (North/South) | US survey feet |
| California | NAD83(2011) / California (zone 1–6) | US survey feet |
| Colorado | NAD83(2011) / Colorado (Central/North/South) | US survey feet |
| Connecticut | NAD83(2011) / Connecticut | US survey feet |
| Delaware | NAD83(2011) / Delaware | US survey feet |
| Florida | NAD83(2011) / Florida (East/North/West) | US survey feet |
| Georgia | NAD83(2011) / Georgia (East/West) | US survey feet |
| Hawaii | — | No suggestion |
| Idaho | NAD83(2011) / Idaho (Central/East/West) | US survey feet |
| Illinois | NAD83(2011) / Illinois (East/West) | US survey feet |
| Indiana | NAD83(2011) / Indiana (East/West) | US survey feet |
| Iowa | NAD83(2011) / IaRCS (zone 1–14) | International feet |
| Kansas | NAD83(2011) / Kansas (North/South) | US survey feet |
| Kentucky | NAD83(2011) / Kentucky (North/South) | US survey feet |
| Louisiana | NAD83(2011) / Louisiana (North/South) | US survey feet |
| Maine | NAD83(2011) / Maine (East/West) | US survey feet |
| Maryland | NAD83(2011) / Maryland | US survey feet |
| Massachusetts | NAD83(2011) / Massachusetts (Island/Mainland) | US survey feet |
| Michigan | NAD83(2011) / Michigan (Central/North/South) | International feet |
| Minnesota | NAD83(2011) / Minnesota (Central/North/South) | US survey feet |
| Mississippi | NAD83(2011) / Mississippi (East/West) | US survey feet |
| Missouri | NAD83(2011) / Missouri (Central/East/West) | International feet |
| Montana | NAD83(2011) / Montana | International feet |
| Nebraska | NAD83(2011) / Nebraska | US survey feet |
| Nevada | NAD83(2011) / Nevada (Central/East/West) | US survey feet |
| New Hampshire | NAD83(2011) / New Hampshire | US survey feet |
| New Jersey | NAD83(2011) / New Jersey | US survey feet |
| New Mexico | NAD83(2011) / New Mexico (Central/East/West) | US survey feet |
| New York | NAD83(2011) / New York (Central/East/Long Island/West) | US survey feet |
| North Carolina | NAD83(2011) / North Carolina | US survey feet |
| North Dakota | NAD83(2011) / North Dakota (North/South) | International feet |
| Ohio | NAD83(2011) / Ohio (North/South) | US survey feet |
| Oklahoma | NAD83(2011) / Oklahoma (North/South) | US survey feet |
| Oregon | NAD83(2011) / Oregon (low distortion zone) | International feet |
| Pennsylvania | NAD83(2011) / Pennsylvania (North/South) | US survey feet |
| Rhode Island | NAD83(2011) / Rhode Island | US survey feet |
| South Carolina | NAD83(2011) / South Carolina | International feet |
| South Dakota | NAD83(2011) / South Dakota (North/South) | US survey feet |
| Tennessee | NAD83(2011) / Tennessee | US survey feet |
| Texas | NAD83(2011) / Texas (Central/North/North Central/South/South Central) | US survey feet |
| Utah | NAD83(2011) / Utah (Central/North/South) | US survey feet |
| Vermont | NAD83(2011) / Vermont | US survey feet |
| Virginia | NAD83(2011) / Virginia (North/South) | US survey feet |
| Washington | NAD83(2011) / Washington (North/South) | US survey feet |
| West Virginia | NAD83(2011) / West Virginia (North/South) | US survey feet |
| Wisconsin | NAD83(2011) / WISCRS (county) | US survey feet |
| Wyoming | NAD83(2011) / Wyoming (East/Central/West/West Central) | US survey feet |