DETECTION OF OAK WILT WITH COLOR IR AERIAL PHOTOGRAPHY

During the period 1971-73, the following film/filter combinations at various scales were used to detect oak wilt infection centers in North Oaks, Minnesota; Ektachrome MS/Wratten 2A, Ektachrome IR/Wratten 15, and Ektrachrome IR/Wratten 21 at scales of 1:6,000, 1:12,000, 1:15,840, 1:24,000, and 1:31,680. Up to 100 percent detection of oak wilt infection centers was achieved with the 1:24,000 scale Ektachrome IR/Wratten 21 combination, although commission errors, i.e., calling dead trees or dead branches as oak wilt infection centers, remains a problem. The use of other combinations also proved relatively efficient and less costly than ground surveys alone. /Author/

  • Availability:
  • Corporate Authors:

    American Society of Photogrammetry

    105 North Virginia Avenue
    Falls Church, VA  USA  22046
  • Authors:
    • Ulliman, J J
    • French, D W
  • Publication Date: 1977-10

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00167903
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Feb 16 1978 12:00AM