NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Fragmented Land Cover Types and Estimation of Area with Course Spatial Resolution ImageryImagery of coarse resolution, such weather satellite imagery with 1 sq km pixels, is increasingly used to monitor dynamic and fragmented types of land surface types, such as scars from recent fires and ponds in wetlands. Accurate estimates of these land cover types at regional to global scales are required to assess the roles of fires and wetlands in global warming, yet difficult to compute when much of the area is accounted for by fragments about the same size as the pixels. In previous research, we found that size distribution of the fragments in several example scenes fit simple two-parameter models and related effects of coarse resolution to errors in area estimates based on pixel counts. We report on progress to develop accurate area estimates based on modelling the size distribution of the fragments, including analysis of size distributions on an expanded set of maps developed from digital imagery and a test of a procedure to correct for effects of coarse spatial resolution.
Document ID
20020065535
Acquisition Source
Ames Research Center
Document Type
Conference Paper
Authors
Hlavka, Chris
(NASA Ames Research Center Moffett Field, CA United States)
Dungan, Jennifer
(California State Univ. Monterey Bay, CA United States)
Gore, William
Date Acquired
August 20, 2013
Publication Date
January 1, 1998
Subject Category
Computer Programming And Software
Meeting Information
Meeting: 3rd International Symposium on Spatial Accuracy Assessment in Natural Resources and Enviornmental Sciences
Location: Quebec City, Quebec
Country: Canada
Start Date: May 20, 1998
End Date: May 22, 1998
Funding Number(s)
PROJECT: RTOP 274-52-81-19
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Available Downloads

There are no available downloads for this record.
No Preview Available