What is a Horizontal Datum Reference Frame?
A horizontal datum provides a reference frame for latitude and longitude coordinates on the Earth. A datum is constructed through surveys and triangulation.
Maps & Cartography
Equal Interval Classification in GIS
The equal interval classification method divides attribute values into equal size range taking the data’s minimum and maximum values.
NAD27 – Meade’s Ranch at the Center of It All
Meade’s Ranch was the focal point of the NAD27 with all positions relative to it. First-order triangulation was used with approximately 26,000 survey points
Datum Transformations – Converting Coordinates from NAD27 to NAD83
NAD27 and NAD83 may differ in tens of meters for horizontal accuracy on location. Datum transformations correct your data from one datum to another.