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Steven A. Sader

Researcher at University of Maine

Publications -  44
Citations -  3693

Steven A. Sader is an academic researcher from University of Maine. The author has contributed to research in topics: Normalized Difference Vegetation Index & Thematic Mapper. The author has an hindex of 24, co-authored 44 publications receiving 3402 citations.

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Detection of forest harvest type using multiple dates of Landsat TM imagery

TL;DR: In this paper, a simple and relatively accurate technique for classifying time-series Landsat Thematic Mapper (TM) imagery to detect levels of forest harvest is the topic of this research.
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Comparison of time series tasseled cap wetness and the normalized difference moisture index in detecting forest disturbances

TL;DR: In this paper, the authors compared multitemporal normalized difference moisture index (NDMI) and tasseled cap wetness (TCW) data sets and compared their statistical relationships and relative efficiencies in detecting forest disturbances associated with forest type and harvest intensity at five, two and one year Landsat acquisition intervals.
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Deforestation rates and trends in Costa Rica, 1940 to 1983

Steven A. Sader, +1 more
- 01 Mar 1988 - 
TL;DR: Forest area change associated with life zones, slope gradients, and transportation networks was examined within the framework of a geographically referenced data base for Costa Rica between 1940 and 1983 to quantitatively assess forest change dynamics.
Journal Article

Comparison of change-detection techniques for monitoring tropical forest clearing and vegetation regrowth in a time series

TL;DR: In this article, three change detection methods were evaluated: normalized difference vegetation index (NDVI) image differencing, principal component analysis, and RGB-NDVI change detection.
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Tropical forest biomass and successional age class relationships to a vegetation index derived from Landsat TM data

TL;DR: In this article, the feasibility of detecting tropical forest successional age class and total biomass differences using Landsat-Thematic mapper (TM) data, was evaluated and it was shown that NDVI differences were not detectable for successional forests older than approximately 15-20 years.