Implementation of GPS/IMU Integration Technique for GCP Reduction

Implementation of GPS/IMU Integration Technique for GCP Reduction

Albadi Alnoami
Military Survey, UAE Armed Force
Abu Dhabi, UAE
Email: albadi@uaesurvey.ae

Khalid Almelhi
Military Survey, UAE Armed Force
Email: almelhi@uaesurvey.ae

Abstract:
One of the basic problems of photogrammetry and land surveying is the reconstruction exterior orientation parameters and the establishment of Ground Control Points. Over the last 40 years, triangulation techniques have been developed and improved in order to determine these elements of the exterior orientation by computational methods.

MSD has implemented the Integrated Sensor Orientation method to reduce the use of GCP’s. This method requires the use of airborne system receivers, global positioning system (GPS) and an inertial system combined with a sensor, to determine angles and accelerations with high precision on board, and finally the reference stations on ground. Since the year 2001, MSD is using the modular system AEROcontrol™ and CCNS4 (IGI, Kreuztal; Germany) to determine exterior orientation parameters. Total of more than three blocks have been measured using ImageStation, Intergraph system for Automatic Triangulation (ISAT) and BINGO Bundle Adjustments.

The GPS/IMU data integration technique used only minimum number of GCP’s for the quick acquisition of high precision orientation parameters . Further, the results proved that the technique is efficient for the production of high accurate maps with lesser resources.