Rapid orthophoto development system.

Details

• Creators:
  Toth, Charles ; Grejner-Brzezinska, Dorota A.
• Corporate Creators:
  Ohio State University. Center for Mapping
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Aerial photography
  • Digital cameras
  • Performance measurement
  • Orthophotographs
  • Aerial application
  • Aerial surveying
  • Bridges
• Publication/ Report Number:
  FHWA/OH-2013/6
• Resource Type:
  Tech Report
• Geographical Coverage:
  Ohio
• Corporate Publisher:
  Ohio. Dept. of Transportation. Research Section
• Abstract:
  The DMC system procured in the project represented state-of-the-art, large-format digital aerial camera systems at the start of ; project. DMC is based on the frame camera model, and to achieve large ground coverage with high spatial resolution, the ; output image is formed from four independent images acquired by four cameras. DMC procured for OCMS was carefully ; tested to assess its performance level. From test flights by ODOT, three different blocks were selected, representing different ; flying condition and flight geometry. Five methods were used for the performance evaluation, including two methods where ; self-calibration was also introduced. The analysis of the results confirmed that the DMC meets the manufacturer’s ; specification. To maintain consistent performance in normal operations, periodical calibration flights and the use of ground ; controls as check points is highly recommended. In addition to further support QA/QC, the use of automated aerial ; triangulation is also suggested. ; The main product of the ODOT Office of Mapping and CADD Services is orthophoto, which is widely used in many ; applications at ODOT and other State offices. Since ODOT primarily acquires data over the transportation network, the ; orthophoto production has some specific needs, such as dealing with bridges and occlusions, besides the general tasks of ; the orthoimage workflow. In this project, an innovative method was developed to support the orthoimage generation at ; bridges. The concept is built around the development of a precise bridge model, which is formed from the DMC imagery and ; LiDAR data. In addition, a true orthophoto generation process was implemented. The initial versions of both software tools ; installed at Office of CADD and Mapping Services for testing provided valuable feedback for algorithmic refinements.
  More +
• Format:
  PDF
• Funding:
  SJN 134414
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/26790/dot_26790_DS1.pdf
• File Type:
  [PDF - 4.80 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:4c93765649032081a9a4eb60d8591208c8c74d726bb5ef4a34c0d02a52585ea6