Grlevelx Placefiles -

Think of the radar display as a map printed on a clear plastic sheet. A placefile is another clear plastic sheet with drawings on it that you lay over the base map. Because the placefile relies on latitude and longitude coordinates, the data aligns perfectly with the earth below, regardless of how much you zoom in or pan around.

Placefiles generally fall into two categories based on how the data is updated: grlevelx placefiles