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.
1 Bloating or swelling of leg and belly in medical terms is also called edema.  Edema is the result of accumulation of fluid in body tissues. Edema most commonly occurs in feet and leg and is called as peripheral edema.