gis:set-transformation-ds

gis:set-transformation-ds gis-envelope netlogo-envelope

Does the same thing as set-transformation above, except that it allows the scale for mapping the range of x values to be different than the scale for y values. The “-ds” on the end stands for “different scales”. Using different scales will cause distortion of the shape of GIS features, and so it is generally not recommended, but it may be useful for some models.

Here is an example of the difference between set-transformation and set-transformation-ds:

Using [set-transformation](#gisset-transformation), the scale along the x and y axis is the same, preserving the round shape of the Earth in this Orthographic projection.	Using [set-transformation-ds](#gisset-transformation-ds), the scale along the x axis is stretched so that the earth covers the entire NetLogo View, which in this case distorts the shape of the Earth.