Lidar DEM for characterizing the volcanic landforms of Tatun Volcanoes in metropolitan Taipei

Jin King Liu*, Tian-Yuan Shih, Yu G. Chan, Yu Chung Hsieh

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

6 Scopus citations

Abstract

Tatun Volcano Group is a cluster of dormant volcanoes surrounding Metropolitan Taipei. Rugged terrain, monotonie lithology and dense vegetation covers are adverse factors for mapping the geological structures. In this study, airborne Lidar survey was conducted to obtain a bare ground DEM with 2m grid and with an accuracy of decimeters. Shadedrelief images, pit-patterns and drainage networks are then derived from these DEMs for visual interpretation. 51 volcanoes are thus recognized. Two fissures running through the highest volcano in this area, namely Mount Seven-stars, are extending 2000m and 1000m, respectively. The largest width and depth of the opening of the ruptures is located in the west flank of the volcanic cone. The slope angle of the east-wing of the volcanic cone is 36°, whereas the angle of the west-wing is only 24.5°. The opening of the west fissure is larger and its extension is longer than the east one. Thus, the west side can be subjected to an active extensional process of strain. The fissures could be resulted from the ongoing regional extension of the Tatun Volcanic area due to the plate subduction and collision of the Eurasian Plate and the Philippine Sea Plate.

Original languageEnglish
Title of host publication2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007
Pages3752-3755
Number of pages4
DOIs
StatePublished - 1 Dec 2007
Event2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007 - Barcelona, Spain
Duration: 23 Jun 200728 Jun 2007

Publication series

NameInternational Geoscience and Remote Sensing Symposium (IGARSS)

Conference

Conference2007 IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2007
CountrySpain
CityBarcelona
Period23/06/0728/06/07

Keywords

  • Chicing volcano
  • DEM
  • Landforms
  • Lidar
  • Tatun Volcano Group

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