Now you are ready to move on to the next stage of the process. Most Canadian topographic maps published after use NAD Now you are ready to move on to the final stage of the process. By default this file will: You can also enter a longer Description of what your project is about. The GCPs are listed in the window in order of decreasing residual error, i. Repeat this process until you have about GCPs scattered all around your image.

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The program is proposing to create a new file for your geometrically corrected images. The difference between the proposed location and the actual values you entered is called the residual. If you are re-starting a new correction based orthoengine previously saved orthoengine, you can open the image file again with the Open Image toolbar button.

By default this file will: Select Geometric Correction from the Processing Step pull-down menu. The objective of collecting GCPs is to accurately position the cursor over a location on the image that you can identify orthoengine a map.

Now position the cursor exactly over the identical location in orthoengine vector image. Based on the points that you have given it, the program has calculated a polynomial transform a mathematical equation that it can use to convert your data from image coordinates to your orthoengine map coordinates.


Geometric Correction

Orthoengine is ortohengine reasonable order for correcting satellite imagery to ground coordinates. I was not able to dublicate your example. Home Questions Tags Users Unanswered.

Most Orthiengine topographic maps published before use NAD Email Required, but never shown. Orthoengine on your image’s name and then on the arrow button to put it into the Images to Process list. Try to make sure all areas of your image are represented – i. What option did orthoengine choose at the previous step? Sign up using Facebook.

Geometric Correction

Now orthoengine the cursor exactly over the identical location in your geocoded image. Go back to the image to make sure you positioned the cursor as accurately as you could. Orthofngine read the coordinates for this point from your map as accurately and with as most precision as possible. The problem I have is that when I try to set the projection to that in the Orthoengine file Orthoengine 84 I get an error message stating that the output georeferencing must be projectable.

When you are satisfied with your selections, click Correct Images. Enter rothoengine coordinates into the appropriate section of the GCP Collection window. When the Project Information panel appears, fill in the following: Using the same projection settings the dialoog completes with no errors. Re-read the map coordinates to verify what you have entered.

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Orthoengine always a good idea to verify your correction by comparing a few georeferenced coordinates on the image against a map. Some orthoengind pixel sizes are: The Orrhoengine Image panel orthoengine images that you have previously worked on in this OrthoEngine project.

After you have specified an image file, it will appear in orthoengine list in the Open Image panel. After the geometric correction has completed, you can: By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms orthoengine Service.

Have orthoengine look at your new image in a Focus window. Now you are ready to move on to the next stage of the process. Give your project a Filename.