ArcMap is run using primarily Shape Files and in more recent versions Geodatabases can be used to store larger sets of data. These file formats are what are uploaded into the program to view spatial data.
Edema is swelling of both legs from a buildup of extra fluid. Prolonged standing or sitting, especially in hot weather, can cause excess fluid to accumulate in the feet, ankles and lower legs. Tiny valves inside the veins of the legs can become weakened, causing a common problem called venous insufficiency.
In these diseases, the leg swelling is typically characterized by nonpitting edema. When leg swelling occurs for unknown reasons, it is referred to as idiopathic edema. Symptoms that can be associated with leg swelling include leg pain, numbness, redness, itching, rash, shortness of breath, and ulceration of the skin. Medically Reviewed by a Doctor on 5/17/2016.