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.
DEAR READER: Swelling of the legs from a buildup of extra fluid is known as edema. In addition to the swelling, the skin above the swollen area is stretched and shiny. Your doctor can easily check for edema by gently pressing a finger over your foot, ankle or leg with slow, steady pressure.