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.
Chronic leg swelling, or leg swelling that builds up over time, often indicates a potentially serious disorder, such as congestive heart failure or cardiovascular disease. Leg swelling can also be caused by orthopedic conditions, such as a bone fracture or a cast that is too tight. Because leg swelling can be a symptom of a life-threatening condition, you should seek prompt medical care and talk with your medical professional about your symptoms.