Coordinate System

The coordinate system describes the method by which the data locates positions in the world. Each coordinate system is associated with its Well Known Text (WKT) description, a simple structured, text-based format that is easy to store and share between systems (See http://www.geoapi.org/2.0/javadoc/org/opengis/referencing/doc-files/WKT.html). The coordinate system continues to be defined also by four standard parameters, Group, System, Datum and Units, in order to provide backward compatibility. Usually, the data supplier provides the information about the coordinate system used for each source.

All project layers must use the same coordinate system. If you add a layer to a project that uses a different coordinate system than the one you set when you started the project, TerraBuilder reprojects (converts) the layer's data, so that the same location is described, but in the project’s coordinate system. If a layer does not include coordinate system information or TerraBuilder is unable to read this information, you must supply the coordinate system information so that TerraBuilder can reproject the layer.