The ElevationRange Element

The ElevationRange specifies the lowest and highest elevations for a point cloud that Express Server will retain when rendering an image.

Put another way, ExpressServer will ignore points below the minimum elevation or above the maximum elevation, only rendering those that fall within the specified range.

The units for the range depend on your catalog. If you omit the minimum, then the catalog's lowest elevation will be used; if you omit the maximum, then the catalog's highest elevation will be used.

Examples: The ElevationRange Element

The following shows a city in the Western US (assuming the range units are in feet, and your images are of the state of Colorado).

   <Catalog enabled="true" name="DenverAndEnvirons">
      ...
      <ElevationRange minimum="4500" maximum="6000" />
      ...
   </Catalog>
        

The following returns image points from the base elevation up to a certain level.

   <Catalog enabled="true" name="WayOnDown">
      ...
      <ElevationRange maximum="200000" />
      ...
   </Catalog>
		

This example starts at a given elevation and returns points for everything above it.

   <Catalog enabled="true" name="TheSkysTheLimit">
      ...
      <ElevationRange minimum="1000" />
      ...
   </Catalog>