• Tips and Tricks

    Recommended Datum Transformation to Use with RIGIS Data

    Datum transformations help you to more accurately re-project a GIS dataset from one coordinate system to another. Selecting an appropriate datum transformation is a stumbling block for many GIS users when they mashup datasets that use different coordinate systems. Esri ArcGIS Desktop and Pro software have a robust project-on-the-fly system, however it’s worth taking a look at the datum transformation method the next time you’re adding a new dataset that uses a different coordinate system than your map’s. Here at RIGIS, we’re continuing to use Esri’s “NAD_1983_To_WGS_1984_5” datum transformation when projecting data between Rhode Island State Plane NAD83 U.S. Survey Feet (EPSG 3438) and coordinate systems that use the WGS84…