OrthoEngine Data Import Issues

This section primarily deals with issues related to Remote Sensing Data types in Ortho Engine. Some of the questions may also deal alternative solutions to perform tasks as in Focus or Modeler.

Geomatica Ortho Engine is a rigorous environment for generating a variety of imagery data products.

How do I import QuickBird Standard data from DigitalGlobe? I have followed the instructions from the online QuickBird tutorial but still get an error message.

My Quickbird  images are in several TIF tiles with one RPC file, how do I use all the TIF files  together in OrthoEngine?

I am having trouble reading my Aster data into OrthoEngine?

Q) How do I import QuickBird Standard data from DigitalGlobe? I have followed the instructions from the online QuickBird tutorial but still get an error message.

A) The problem is related to a change in the QuickBird IMD format that will be addressed in the first V10 patch. For now, the problem can be resolved by editing the QuickBird IMD file. Change "meanInTrackViewAngle to inTrackViewAngle" & "meanCrossTrackViewAngle to crossTrackViewAngle". You can then import the data in as shown in the tutorial. Note that the IMD file is case sensitive so these fields must entered exactly as shown above.

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Q) My Quickbird  images are in several TIF tiles with one RPC file, how do I use all the TIF files  together in OrthoEngine?

A) Due to the size limitations, QuickBird images may be delivered to you as image tiles with RPC data. The RPC data is used with the Rational Functions math model and covers the entire scene, not the individual tiles. Therefore, you must reassemble the tiles into one scene before importing it into your project.

The QuickBird scene may be separated into a regular block of tiles, for example a five-by-five block of tiles, or it can be separated into an irregular block of tiles, for example tiles following the path of a river. Regardless of how the tiles are organized, you only need to identify one of the tiles in the Sample Tile box and OrthoEngine will locate all the related tiles. To assemble the tiles:

1. Copy the image tiles into the same folder on your hard drive.

2. Start a Rational Functions project with the option Extract from Image File.

3. In the main menu, click Utilities.

4. Click Assemble QuickBird Tiles.

5. In the Number of rows box select the number of rows that form the assembled scene and in the Number of columns box select the number of columns.

6. In the Sample Tile box, enter the path and file name of one of the tiles or click Browse to select the file.

7. In the Output filename box, enter the path and file name for the file that will contain the assembled scene.

8. Click Assemble to initiate the process.

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Q) I am having trouble reading my Aster data into OrthoEngine?

A) Quite often when a user downloads Aster data, the filename(s) will not have any extensions with them. OrthoEngine requires the filename to include the HDF extension. Thus all you need to do is to change the filename to include .hdf (".hdf"). Once you have done this to your file(s) then OrthoeEngine should run smoothly.

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