About Digital Elevation Models

The bulk digital elevation models are generally constructed using remotes sensing techniques and tools, such as satellite radar and aircraft imaging. However, in some cases data procured via the standard method of direct land surveying is usually implemented into the creation of DEMs. Some of the most extremely common uses of DEMs are in what is recognized as digital information systems (DIS). These are systems used by governments and large industries  to assess and analyze the conditions of given region.