RELATIVE ACCURACY

Relative accuracy is the degree to which the distances between points on a map correspond to the actually distances between those points in the real world. To have high relative accuracy it does not matter where the map is located as long as the it's size and shape are correct.

GCPs are not required to make maps with high relative accuracy.

Relative accuracy is important when measuring length, area, and volume on your map. This is also critical for correct spacing of contour lines in an aerial topographical survey.