THE VIEW FROM ABOVE

An offshoot of geographic information system (GIS) technology is digital orthophotos. A digital orthophoto is a raster image of ground features in their true map position created by using computer image processing to remove image displacements. This article is a comprehensive guide to understanding and using digital orthophotos. Digital orthophotos are compared to semirectified enlargements and GIS line maps. The five-step process to create digital orthophotos is described and two GIS applications for digital orthophotos--appraisal mapping and infrastructure management--are discussed. Digital orthophotos can be a viable alternative for creating accurate base maps. Potential users must weigh the benefits, applications, and limitations of digital orthophotos with photogrammetric vector maps.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10519629
• Corporate Authors:

  Civil Engineering News, Incorporated

  1255 Roberts Boulevard, Suite 230
  Kennesaw, GA  United States  30144
• Authors:
  • Cowden, R
  • Brinkman, R F
• Publication Date: 1994-9

Language

• English

Media Info

• Features: Photos;
• Pagination: p. 43
• Serial:
  • Civil Engineering News
  • Volume: 6
  • Issue Number: 8
  • Publisher: Civil Engineering News, Incorporated
  • ISSN: 1051-9629

Subject/Index Terms

• TRT Terms: Aerial photography; Applications; Digital mapping; Digitized photography; Geographic information systems; Image processing; Infrastructure; Orthophotographs; Technology
• Subject Areas: Design; Highways; Planning and Forecasting; Research; I21: Planning of Transport Infrastructure;

Filing Info

• Accession Number: 00670309
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 6 1994 12:00AM