Our ortho-rectified imagery solutions can manage the complete process extending from imaging-system deployment to a final solution.  During deployment of an earth-imaging system, imagery are recorded simultaneously with data from Global Positioning Systems (GPS) and Internal Measurement Units (IMU).  To produce highly accurate ortho-rectified planimetric-mapping imagery sources, imagery must be adjusted by Digital Elevation Models (DEMs), and surveyed Ground Control Points (GCPs), or Replacement Sensor Models (RSMs).

Reference Ellipsoid Registration is a less rigorous and less expensive cousin of ortho-rectification is simply referenced to a standard ellipsoid with little to no terrain model influence.  Commonly referred to as "Geo" or "Level-1 (L1)".  For near-nadir scene subsets covering fairly flat terrain with good ground control, the accuracy of product derived from this method can equal that of ortho-rectified imagery.  We offer both ...

• L1A imagery developed by RSM only,
• L1B imagery with improved accuracy via use of GCPs.

Linear Co-ordinate Translation  -  The whole image is initialized by one set of values that describe:  geographical position, scale, and rotation.  These parameters can accompany the image file internally or via a separate "world file".  Pixel re-sampling or data transformation do not necessarily occur.  This method is well suited for loosely geo-referencing large volumes of scanned paper maps or aerial photography.

Database Linking  -  Oblique, panoramic, aerial, and street-level imagery can also be geo-referenced via database linking.  GeoVAR's OAP/GIS v. 1.0 efficiently performs this task with large volumes of imagery.