Extracting high points from statistical surfaces: A case study using digital elevation models

Elizabeth Wentz, Michael Kuby, Brandon J. Vogt

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We introduce and test algorithm for extracting high-point locations from statistical surface data. The algorithm uses map algebra and local neighborhood analysis via three key parameters: minimum vertical gain vertical gain neighborhood, and horizontal separation neighborhood. Though the method is applicable to any x,y,z data set, we tested it on 1:250,000 digital elevation models (DEMs) for Arizona. The resulting high points were compared quantitatively with an independent data set of named summits from the USGS Geographic Names Information System (GNIS). The comparison showed that, on an aggregate basis, the extraction method can approximate the number and spatial pattern of high points when compared to the GNIS points. However, extraction by neighborhood analysis may consistently misdiagnose certain features, such as the edges of troughs (e.g., canyon rims).

Original languageEnglish (US)
Pages (from-to)259-271
Number of pages13
JournalCartography and Geographic Information Science
Volume28
Issue number4
StatePublished - Oct 2001

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digital elevation model
Information systems
Algebra
information system
extraction method
canyon
trough
analysis

Keywords

  • Digital elevation model (DEM)
  • Feature extraction
  • High point
  • Statistical surface
  • Summit

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Management of Technology and Innovation
  • Geography, Planning and Development

Cite this

Extracting high points from statistical surfaces : A case study using digital elevation models. / Wentz, Elizabeth; Kuby, Michael; Vogt, Brandon J.

In: Cartography and Geographic Information Science, Vol. 28, No. 4, 10.2001, p. 259-271.

Research output: Contribution to journalArticle

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