USE OF GPS FOR PHOTOGRAMMETRY. FINAL REPORT

Five test flights were conducted to study the use of Global Positioning System (GPS) in Photogrammetry, three in Iowa, one each in California and Texas. These tests show that GPS can be used to establish ground control by the static method and to determine camera location by the kinematic method. In block triangulation, six GPS controls are required and additional elevation control along the centerline is also required in strip triangulation. The camera location determined by aerial triangulation depends on the scale of the photography. The 1:3000 scale photography showed that the absolute accuracy of the camera location by GPS is better than five centimeters. The 1:40000 scale photography showed that the relative accuracy of the camera location by GPS is about one millimeter. In a strip triangulation elevation control is required in addition to the camera location by GPS. However, for block triangulation camera location by GPS is sufficient. Pre-targeting of pass and tie points gives the best results in both block and strip triangulation. In normal mapping for earth work computations the use of 1:6000 scale photography with GPS control instead of 1:3000 scale is recommended. It is recommended that research be done in the use of GPS for navigation in aerial photographic missions. It is highly recommended that research be done in the use of GPS to determine tip and tilt of the aerial camera, that is required in stereoplotting.

• Record URL:
  • http://publications.iowa.gov/id/eprint/16215
• Corporate Authors:

  Iowa State University, Ames

  Department of Civil, Construction and Environmental Engineering
  Town Engineering Building
  Ames, IA  United States  50011-3232

  Iowa Department of Transportation

  800 Lincoln Way
  Ames, IA  United States  50010
• Authors:
  • Jeyapalan, K
  • Stein, M A
  • Awuah-Baffour, R
  • Wang, J
  • Luzem, B
  • Wang, Yinhi
• Publication Date: 1993-1

Language

• English

Media Info

• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 141 p.

Subject/Index Terms

• TRT Terms: Accuracy; Future; Global Positioning System; Mapping; Photogrammetry; Recommendations; Research; Triangulation
• Uncontrolled Terms: Aerial triangulation; Future research
• Subject Areas: Design; Highways; Planning and Forecasting; Research; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00626795
• Record Type: Publication
• Report/Paper Numbers: Iowa DOT Proj HR-342, ISU-ERI-Ames-93096
• Files: TRIS, STATEDOT
• Created Date: Feb 10 1993 12:00AM