HR: 0830h
AN: B41B-0880    [PDF]
TI: Using IKONOS and Aerial Videography to Validate Landsat Land Cover Maps of Central African Tropical Rain Forests
AU: Lin, T
EM: tslin@whrc.org
AF: Woods Hole Research Center, PO Box 296, Woods Hole, MA 02543-0296 United States
AU: * Laporte, N T
EM: nlaporte@whrc.org
AF: Woods Hole Research Center, PO Box 296, Woods Hole, MA 02543-0296 United States
AB: Compared to the traditional validation methods, aerial videography is a relatively inexpensive and time-efficient approach to collect "field" data for validating satellite-derived land cover map over large areas. In particular, this approach is valuable in remote and inaccessible locations. In the Sangha Tri-National Park region of Central Africa, where road access is limited to industrial logging sites, we are using IKONOS imagery and aerial videography to assess the accuracy of Landsat-derived land cover maps. As part of a NASA Land Cover Land Use Change project (INFORMS) and in collaboration with the Wildlife Conservation Society in the Republic of Congo, over 1500km of aerial video transects were collected in the Spring of 2001. The use of MediaMapper software combined with a VMS 200 video mapping system enabled the collection of aerial transects to be registered with geographic locations from a Geographic Positioning System. Video frame were extracted, visually interpreted, and compared to land cover types mapped by Landsat. We addressed the limitations of accuracy assessment using aerial-base data and its potential for improving vegetation mapping in tropical rain forests. The results of the videography and IKONOS image analysis demonstrate the utility of very high resolution imagery for map validation and forest resource assessment.
UR: http://www.whrc.org/Africa
DE: 0400 Biogeosciences
DE: 1640 Remote sensing
DE: 1694 Instruments and techniques
DE: 1699 General or miscellaneous
SC: Biogeosciences [B]
MN: 2003 Fall Meeting