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 Infection â Skin infection (cellulitis) may cause a swollen and red leg. Skin infection may sometimes be confused with deep vein thrombosis.  Trauma â when a leg suffers injury or trauma, it swells. Therefore, trauma, even one that was not felt, needs to be excluded when a single swollen leg is encountered.