Setting true-orthorectification options

True orthorectification corrects output orthorectified images for geometric distortions due to sensor tilt, ground surface relief, and aboveground objects, such as buildings and bridges. It compensates for occluded areas in each ortho image from adjacent overlapping images. Objects are shown in their actual planimetric locations on Earth and provide a means for taking accurate measurements.

To set options for true orthorectification

  1. In the Vector File window, under Available layers, click a layer.
  2. In the Building model scale box, type a value to represent the scale of the building model in the layer.
  3. In the Building model offset box, type a value to represent the shift of the building model elevation.
  4. In the Building model unit list, click Meters or Feet, as applicable, to identify the unit of the building model offset and scale.
  5. In the Building model reference list, click one of the following:
    • Mean Sea Level: Building models are referenced to Mean Sea Level (MSL). This is the default value.
    • Ellipsoidal: Building models are referenced to the ellipsoid.
  6. In the Building model error box, type a value to represent the accuracy of the building models in units of ortho pixels.
  7. In the Radiometric difference list, click one of the following:
    • Any
    • Low
    • Moderate
    • High

    Radiometric difference is the allowable difference between a candidate image and the current image for it to be considered for occlusion recovery.

  8. Click OK.
Parent topic: Orthorectifying images and true orthorectification
Previous topic: Setting DEM file options

© PCI Geomatics Enterprises, Inc.®, 2024. All rights reserved.