Definitions for "Base data"
the original source data, such as maps or other measurements or plans, on which a project (landscape, architectural or geographic) is based, and from which other data (e.g. slope, or intermediate layers) are derived
Those digital fields of reflectivity, mean radial velocity, and spectrum width data in spherical coordinates provided at the finest resolution available from the radar.
The basis on which natural resource data can be overlaid, such as a defined portion of the earth's surface represented by a topographic map.