...

...

...

Selecting Databases>Terrain from the main menu bar opens the Terrain Databases dialog box, where you can enter the location of a maximum of five terrain elevation databases by defining the disk drive and directory where these databases are stored. There are currently a total of ten terrain database types you can use with EDX software. You can also set the Terrain height error margin for LOS paths when you are doing a line-of-sight (LOS) study. If a value is entered, all values in the terrain database will be increased by the amount entered, so that a more conservative coverage estimate can be determined.

...

Some caution must be exercised when using this feature. Databases derived from different sources, or using different methods, may not have matching elevation points at the boundaries between data files. The often-encountered consequence is a “cliff” or “seam” along the transition from the 30- meter data, for example, and the 3-second data. This should be kept in mind when reviewing the results of a terrain extraction, area-wide propagation study, or path profile for a link study. Some databases, like the US, Canadian and Mexican 3-second databases, are all from the same source and generally, there will be smooth transitions across the border data file.

Import From Vertical Mapper (optional)

This is a separate option for EDX SignalPro and is installed after SignalPro is installed. If the Vertical Mapper option is not installed, the Import button will not be enabled in the Terrain Databases dialog box. To initiate the import Vertical Mapper “.grd” files process, press the Import button in the Terrain Databases dialog which opens the following dialog box:

...