Conifer Tree Influence on Digital Terrain Elevation Data (DTED): A Case Study at Dulles International Airport

Abstract

Conifer tree influence on the collection and portrayal of Digital Terrain Elevation Data (DTED) is presented. Study sites are investigated which had dense conifer canopy closure. Two separate DTED collection techniques are examined in the context of studying conifer tree influence: (1) photo source auto-correlated, and (2) photo source operator assisted (floating dot). Field surveying is the mechanism used for collecting accurate, verifiable ground elevation data subsequently compared against the elevations of corresponding DTED positions. Estimated conifer tree stand heights (at the time of DTED photo source) are compared against the difference in value between DTED and field surveyed elevations. A close relationship between stand height and difference values demonstrates the potential for conifer tree height inclusion within DTED 'ground' elevations. Terrain modelling impacts caused by the addition of tree heights within the DTED are addressed.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1993
Accession Number
ADA274213

Entities

People

  • Kevin R. Slocum

Organizations

  • Army Geospatial Center

Tags

DTIC Thesaurus Topics

  • Aerial Photography
  • Artificial Satellites
  • Boundaries
  • Case Studies
  • Computer Programs
  • Correlators
  • Data Sets
  • Forests
  • Geographic Information Systems
  • Geographic Regions
  • Inclusions
  • International Airports
  • Photography
  • Statistical Analysis
  • Surveys
  • Terrain Models
  • Tree Canopy

Fields of Study

  • Environmental science

Readers

  • Computer Vision.
  • Geodesy
  • Marine Ecological Systems Migration