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Remote Sens. 2014, 6(2), 1275-1293;

Validation of the Two Standard MODIS Satellite Burned-Area Products and an Empirically-Derived Merged Product in South Africa

Department of Geography, Geoinformatics and Meteorology, University of Pretoria, Pretoria 0002, South Africa
Remote Sensing Research Unit, CSIR Meraka Institute, P.O. Box 395, Pretoria 0001, South Africa
Ecosystems, Processes and Dynamics, CSIR Natural Resources and the Environment, P.O. Box 395, Pretoria 0001, South Africa
School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Private Bag 3, WITS, Johannesburg 2050, South Africa
Author to whom correspondence should be addressed.
Received: 20 October 2013 / Revised: 18 November 2013 / Accepted: 30 December 2013 / Published: 4 February 2014
(This article belongs to the Special Issue Analysis of Remote Sensing Image Data)
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The 500-m Moderate Resolution Imaging Spectroradiometer (MODIS) burned area products, MCD45A1, MCD64A1, and a merged product were validated across six study sites in South Africa using independently-derived Landsat burned-area reference data during the fire season of 2007. The objectives of this study were to: (i) investigate the likelihood of the improved detection of small burns through an empirically-derived merged product; (ii) quantify the probability of detection by each product using sub-pixel burned area measures; and, (iii) compare the mean percent concurrence of burned pixels between the standard products over a ten-year time series in each site. Results show that MCD45A1 presented higher detection probabilities (i.e., 3.0%–37.9%) for small fractions ≤50%, whereas MCD64A1 appeared more reliable (i.e., 12.0%–89.2%) in detecting large fractions >50% of a burned MODIS pixel, respectively. Overall, the merged product demonstrated improved detection of the burned area in all fractions. This paper also demonstrates that, on average, >50% of MODIS burned pixels temporally concur between the MCD45A1 and MCD64A1 products in each site. These findings have significant implications for fire monitoring in southern Africa and contribute toward the understanding of the range and of the sources of errors present in the MODIS burned area products. View Full-Text
Keywords: burned area; Landsat TM; MODIS product; biome burned area; Landsat TM; MODIS product; biome
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Tsela, P.; Wessels, K.; Botai, J.; Archibald, S.; Swanepoel, D.; Steenkamp, K.; Frost, P. Validation of the Two Standard MODIS Satellite Burned-Area Products and an Empirically-Derived Merged Product in South Africa. Remote Sens. 2014, 6, 1275-1293.

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