Digital data obtained from Satellite Images have inherent distortions which must be rectified in order to place surface features at their true geographic coordinates. The corrected image is known as an Orthoimage. Thus, an Orthoimage is an image file which has geospatial relevance. Each pixel has an associated map coordinate. Orthorectification is the business of adjusting pixel position for elevation and viewing angle distortions. This results in a final geographical information system (GIS) image which has significantly higher spatial accuracy than the original flat file.
The geolocation accuracy may be expected to have a circular error of 2 meters with a confidence level of 90%. Ground control points and accuracy of the digital elevation model are the two parameters which most effect the accuracy of an orthomap. For most environmental applications, the standard accuracy of 6.5 meters CE90 is sufficient. Most of our orthomaps are derived from Geoeye and DigitalGlobe satellite images which have a ground sampling distance of 0.5 meters. Please contact us for more information on orthomaps and orthorectification.


© 2014 AKS Geoscience Inc.
Digital data obtained from Satellite Images have inherent distortions which must be rectified in order to place surface features at their true geographic coordinates. The corrected image is known as an Orthoimage. Thus, an Orthoimage is an image file which has geospatial relevance. Each pixel has an associated map coordinate. Orthorectification is the business of adjusting pixel position for elevation and viewing angle distortions. This results in a final geographical information system (GIS) image which has significantly higher spatial accuracy than the original flat file.
The geolocation accuracy may be expected to have a circular error of 2 meters with a confidence level of 90%. Ground control points and accuracy of the digital elevation model are the two parameters which most effect the accuracy of an orthomap. For most environmental applications, the standard accuracy of 6.5 meters CE90 is sufficient. Most of our orthomaps are derived from Geoeye and DigitalGlobe satellite images which have a ground sampling distance of 0.5 meters. Please contact us for more information on orthomaps and orthorectification.


© 2014 AKS Geoscience Inc.
Digital data obtained from Satellite Images have inherent distortions which must be rectified in order to place surface features at their true geographic coordinates. The corrected image is known as an Orthoimage. Thus, an Orthoimage is an image file which has geospatial relevance. Each pixel has an associated map coordinate. Orthorectification is the business of adjusting pixel position for elevation and viewing angle distortions. This results in a final geographical information system (GIS) image which has significantly higher spatial accuracy than the original flat file.

The geolocation accuracy may be expected to have a circular error of 2 meters with a confidence level of 90%. Ground control points and accuracy of the digital elevation model are the two parameters which most effect the accuracy of an orthomap. For most environmental applications, the standard accuracy of 6.5 meters CE90 is sufficient. Most of our orthomaps are derived from Geoeye and DigitalGlobe satellite images which have a ground sampling distance of 0.5 meters. Please contact us for more information on orthomaps and orthorectification.
© 2014 AKS Geoscience Inc.