The loops range in size according to the altitude of the land. If the loops are long and spread out, they are the lowest altitude, if they are the smallest on a map, they are the highest point of the land.
That is the correct spelling of "topographical" (on an elevation map).
a TOPOGRAPHICAL MAP shows the contour of the lines
topographical
A Topographical Map.
Topo - possibly from topographical map.
topographical map
A Topographical Map.
Topographical.
A three-dimensional map is also known as a topographical map.
A topographical map gives you the third dimension of altitude.
topographical map.
Topographical lines