Evaluation of the causes of error in the mcd45 burned-area product for the savannas of northern south america Reportar como inadecuado




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Forest fires contribute to deforestation and have been considered a significant source of CO2 emissions. There are global maps that estimate the area affected by fire using the reflectance variation of the surface. In this study we evaluated the reliability and the causes of error of the MCD45 Burned Area Product, by applying the confusion matrix method to the Orinoco River basin. This basin is located in the northern zone of South America, and consists mainly of savanna ecosystemst. For the evaluation we used as reference data five pairs of Landsat images, covering 165,000 km2. The Burned Area Product estimated a burned area of 7,576.43 km2, which is lower than the area of 12,100.16 km2 found with Landsat images, leading to an overall underestimation. The causes of error are associated to the spatial resolution of the map, and to some structures of the algorithm that generates the map.

Tipo de documento: Artículo - Article

Información adicional: Derechos de autor reservados

Palabras clave: Burned area, Orinoco, forest fires, MCD45





Fuente: http://www.bdigital.unal.edu.co


Introducción



EVALUATION OF THE CAUSES OF ERROR IN THE MCD45 BURNED-AREA PRODUCT FOR THE SAVANNAS OF NORTHERN SOUTH AMERICA EVALUACIÓN DE LAS CAUSAS DE ERROR EN EL PRODUCTO DE ÁREA QUEMADA MCD45 PARA LAS SABANAS DEL NORTE DE SURAMÉRICA SEBASTIÁN PALOMINO-ÁNGEL Environmental Engineer, Environmental Engineering Program, Faculty of Engineering, Universidad de Medellín, Medellín, Colombia, spalomino@udem.edu.co JESÚS A.
ANAYA-ACEVEDO PhD, Professor, Environmental Engineering Program, Faculty of Engineering, Universidad de Medellín, Medellín, Colombia, janaya@ udem.edu.co Received for review January 30 th, 2012, accepted September 25th, 2012, final version October, 19 th, 2012 ABSTRACT: Forest fires contribute to deforestation and have been considered a significant source of CO2 emissions.
There are global maps that estimate the area affected by a fire using the reflectance variation of the surface.
In this study, we evaluated the reliability and the causes of error of the MCD45 Burned Area Product, by applying the confusion matrix method to the Orinoco River Basin.
This basin is located in the northern zone of South America, and consists mainly of savanna ecosystems.
For the evaluation, we used as reference data five pairs of Landsat images, covering 165,000 km2.
The Burned Area Product estimated a burned area of ​​7,576.43 km2, which is lower than the area of 12,100.16 km2 found with Landsat images, leading to an overall underestimation.
The causes of error are associated to the spatial resolution of the map, and to some structures of the algorithm that generates the map. KEYWORDS: burned area, Orinoco, forest fires, MCD45 RESUMEN: Los incendios forestales son considerados una causa significativa de deforestación y emisiones de CO2.
Existen productos globales que estiman el área afectada por el fuego utilizando las variaciones de reflectividad en la superficie terrestre.
En este estudio se evaluó la fiabilidad y las causas de error del producto de área quemada MCD...






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