NDLI: Estimation of vegetation cover at subpixel resolution using landsat data

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Estimation of vegetation cover at subpixel resolution using landsat data

Content Provider	NASA Technical Reports Server (NTRS)
Author	Jasinski, Michael F. Eagleson, Peter S.
Copyright Year	1986
Description	The present report summarizes the various approaches relevant to estimating canopy cover at subpixel resolution. The approaches are based on physical models of radiative transfer in non-homogeneous canopies and on empirical methods. The effects of vegetation shadows and topography are examined. Simple versions of the model are tested, using the Taos, New Mexico Study Area database. Emphasis has been placed on using relatively simple models requiring only one or two bands. Although most methods require some degree of ground truth, a two-band method is investigated whereby the percent cover can be estimated without ground truth by examining the limits of the data space. Future work is proposed which will incorporate additional surface parameters into the canopy cover algorithm, such as topography, leaf area, or shadows. The method involves deriving a probability density function for the percent canopy cover based on the joint probability density function of the observed radiances.
File Size	2033084
Page Count	64
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19870006081
Archival Resource Key	ark:/13960/t2j72b952
Language	English
Publisher Date	1986-11-01
Access Restriction	Open
Subject Keyword	Earth Resources And Remote Sensing Canopies Vegetation Landsat 5 Estimating Regression Analysis Ground Truth New Mexico Remote Sensing Spectral Reflectance Pixels Shadows Satellite Imagery Indexes Ratios Algorithms Spectral Resolution Topography Vegetation Landsat 4 Radiative Transfer Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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