| Bringing it All Together As the final program run in the ITRES Standard Processing chain, Geocor geometrically corrects sensor image data by mapping it onto a chosen coordinate system (e.g. UTM). Geocor brings together three data streams acquired during sensor operation:
Bundle Adjustment Input Multiple sensors (imaging sensor, GPS antenna, & IMU) are installed in the aircraft. Installation-related linear and angular offsets between each sensor are measured and corrected for using pbsbund, a program run once on imagery acquired over an established geometric calibration site. Pbsbund generates a set of coefficients used to correct the navigation (attitude & position) data from future datasets, which are then input to Geocor. Doing so results in substantial positional accuracy improvement to the output imagery without the use of project-specific GCPs and tie points. Geocor Sensor Compatibility Geocor works with data from all ITRES sensors (CASI, SASI, TASI, & TABI). Georeferencing Accuracy Formal assessments of the georeferencing accuracy of datasets from ITRES sensors processed using Geocor have been undertaken by independent third parties, including NOAA. Typically these show RMS errors of +/- 1 pixel for 1 m pixels when incorporating a Lidar-based DEM and bundle adjustment. The accuracy and resolution of the DEM and quality of the navigation data often provide the largest influence on positional accuracy. Geocor Specifics
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Product Details Geocor Product Sheet  Feature Highlights
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