range
An interval between two points in one dimension.
If scaleX is in scope, the range will be oriented horizontally; vertically if scaleY is in scope.
One of scaleX or scaleY must be in scope, but not both.
Attributes
map-extent="firstDimension lastDimension"
The two fields of the data which should be used to draw the extent, separated by whitespace. Sets the starting and ending values against which to plot the range. The order of the two attribute values is arbitrary.