CreateTerrainPreviewMesh / GEOTIFF

This command allows you to load GEOTIFF ortho-imagery and see if it overlaps your preview mesh geometry. This command is used to troubleshoot or perform correlation. Once you have completed correlation, delete the preview meshes created by this command.

Using This Command To Check Overlap

Select a group node and apply the command.

Select File » Import Geotiffs for Overlap Testing from the main menu.
The software displays the common file dialog and allows you to select one or more GEOTIFF files.
Select a GEOTIFF file that contains ortho-imagery and click Open.
Scenome creates terrain preview meshes from the imagery and places the camera near the mesh[es].
Checking overlap is described in detail below.

Checking Overlap

This command creates a series of tiles from GEOTIFF files, regardless of whether or not the tiles are neighbors. [Though creating a set of overlap meshes from neighboring tiles is most common.] These overlap meshes are used to determine whether or not your imagery covers a specific geographic area. The primary use of this command is as a diagnostic tool.

Figure 1.1. Preparing to load 62 GEOTIFF files covering one of the geocells located in central Montana, United States. CreateTerrainPreviewMesh Figure 1.2. We do have coverage of the entire geocell. The geocell geometry has been hidden [its boundary edges are displayed in red] and you can clearly see that the overlap meshes created from the GEOTIFF imagery completely cover the geocell. Figure 1.3. These GEOTIFF images contain geographic referencing information for Lambert Conformal Conic projection with the Clarke 1866 datum. Do you think it's important that the geocell geometry use Lambert Conformal Conic project and the Clarke 1866 datum? Of course. The method of projection and datum must match exactly. Here's what happens if the Central Meridian of the Lambert projection is set to -109.6 degrees instead of -109.5 degrees. The GEOTIFF imagery does not overlap - does not correlate to - the terrain correctly. CreateTerrainPreviewMesh

Registration

Command registration information is as follows:

Category Type	Information
Implementation	C++
Module	GIS.DLL
Category	Create Commands
GUID	{1f9220f3-F612-46d4-A453-4B81096121A9}
Source Name	CreateTerrainPreviewMesh
Interface Name[s]	One C++ version of this command is used three times in the interface. Each version has a different name to enhance discoverability. Import Geotiffs for Elevation Import DEMs for Elevation Import Geotiffs for Overlap Testing
Core	No
Sample	Yes
Access	File option on main menu.

CreateTerrainPreviewMesh / GEOTIFF

Using This Command To Check Overlap

Checking Overlap

Registration

See Also