Airborne GPS Controlled Photogrammetry: The Maine Experience

摘要

The Photogrammetry and Control Unit of the Survey Section requested authorization211u001eto research the use of Airborne GPS controlled Photogrammetry for engineering and 211u001edesign purposes. The research was to provide data toward solving questions of 211u001ecost savings, accuracy and acceptability of this technology in terrain of 211u001echanging topography. Two different projects with different terrain patterns and 211u001edifferent scopes were chosen and targeted traditionally. The number of control 211u001epoints used in the final aerotriangulation was determined by resolving error 211u001epropagation of the remaining targeted control points. Once current map accuracy 211u001estandards were met within the control target coordinate set, the photogrammetric 211u001emapping was completed. Each project was mapped by a different consultant, using 211u001edifferent aerotriangulation methods. The results indicate that current standard 211u001emap accuracy standards can be met using Airborne GPS controlled photogrammetry 211u001ewith chaning terrain and changing topography. The cost savings of the Airborne 211u001eGPS controlled photogrammetry is mostly in the targeting stage of the projects.