Cross sections in ArcGlobe and ArcGIS Explorer

What is projected area? Projected area is defined as the rectilinear projection of a surface of any shape onto a plane normal to the unit ...

This month's map from GfK GeoMarketing shows the population density, i.e. the number of inhabitants per km2, in Europe (data source: ...

What is the difference between lambertian and isotropic? Both terms mean "the same in all directions" and are unfortunately someti...