Map GPS Coordinates - GPS Map Coordinates ... - Global Mapper

Global Mapper User's Manual
The Combine Terrain Layers Options panel (displayed above) allows the user to select the name to assign to
the newly generated layer, select the layers to combine to make the new layer, select the operation to perform
when combining the new layer, and select the vertical units and sample spacing of the new layer. The
available operations are described below:
• Addition - values from each layer are added to each other
• Subtraction (Difference) - Signed - value in new layer is assigned to the difference between the
value in the first layer and the value in the second layer
• Subtraction (Difference) - Unsigned - value in new layer is assigned to the magnitude (absolute
value) of the difference between the value in the first layer and the value in the second layer
• Average Elevation - value in new layer is assigned to the average of the value in the first layer and
the value in the second layer
• Minimum Elevation - value in new layer is assigned to the smaller of the value in the first layer and
the value in the second layer
• Maximum Elevation - value in new layer is assigned to the larger of the value in the first layer and
the value in the second layer
• Multiply Values - value in new layer is assigned to the product of the value in the first layer and the
value in the second layer
• Divide 1st Value by 2nd - value in new layer is assigned to the value from the first layer divided by
the value in the second layer. If either value is missing or the second layer value is zero the new
sample is marked as invalid.
Map GPS Coordinates - GPS Map Coordinates - GPSCoordinates Map 79