M

major tick marks

the points on an axis that mark the major divisions of the axis scale. See also minor tick marks.

map

a graphic representation of an area, often a geographic area, but also any other area of any size . See also device map and key map.

map area

a polygon or group of polygons on a map, for example, a state, province , or country. In a traditional map data set, a map area consists of all the observations with the same values for the identification variable or variables . In a feature table, each unique geo-variable value is a map area. Map areas are also called unit areas. See also geo-variable, identification variable, map data set, feature table, and traditional map data set.

map data set

a SAS data set that contains the spatial information the GMAP procedure uses to draw a map. See also feature table and traditional map data set.

meridian

an imaginary circle of constant longitude around the surface of the earth perpendicular to the equator. See also parallel.

midpoint

a value that represents one data value or the middle of a range of data values. When a midpoint represents a range of values, the algorithm used to calculate it depends on the procedure.

minor tick marks

the divisions of the axis scale that fall between major tick marks. See also major tick marks.