A heightmap entity is a special type of Ortho-Imagery set where images describe altitude instead of color. The images for these sets must be in 16bit grayscale PNG format.

Once you select “Heightmap” from the “Add” menu, you will see the following options:



Item Name

A readable name for the new entity

Minimum Height

Elevation value for black pixels in the heightmap

Maximum Height

Elevation value for white pixels in the heightmap

Capture Device

An optional string to identify capture device

Capture Date

An optional field containing the original capture date

Horizontal Datum

The horizontal datum used in the heightmap

Vertical Datum

The vertical datum used in the heightmap

Projection

The projection used by the heightmap

Horizontal Units

The horizontal unit type used in the heightmap

Vertical Units

The vertical unit type used in the heightmap

 

Click “Choose Files” to select which files to upload as the Ortho-Imagery set. Each image in the set is expected to have a matching world registration file. The following table lists the supported image formats and the expected world file extension for the format:


Image Format Extension

Expected World File Extension

.PNG (16bit grayscale)

.PGW

 

You can also select multiple archive ZIP files, which should contain the image and matching world registration files.

Click on “Create” to begin the upload process. You can track the upload operation from the “Pending” section in the project’s page.