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.
Best Answer: Swelling (a.k.a. edema) is caused by a buildup of fluids. When this happens in the legs, ankles, and/or feet, it's called peripheral edema. Swollen feet (or ankles, or legs) can have a wide variety of causes that may be related to one or more of the following: * sitting or standing too long. * injury or trauma. * menstruation (for some women)