Gsd Description Name class Tinman.Pyramid.Gsd Derived from Pyramid Slices this pixel pyramid by allowing only those tiles that have a ground-sample-distance value in the given range. Fields / Required source Type Pyramid Constraint # != null The source pyramid. gsd Type Math.Range The range of ground-sample-distance values to allow, in metres. Fields / External info Type Pyramid.Info Holds detail information about this pixel pyramid. GoogleMaps Info