Development of a Point-based Method for Map Validation and Confidence Interval Estimation: A Case Study of Burned Areas in Amazonia
- *Corresponding Author:
- Liana Oighenstein Anderson
National Center for Monitoring and Early Warning of Natural Disasters
– Cemaden, Technological Park of São José dos Campos
Dr. Altino Bondensan Road, 500
São José dos Campos - São Paulo, Brasil
E-mail: [email protected]
Received date: January 16, 2017; Accepted date: March 07, 2017; Published date: March 10, 2017
Citation: Anderson LO, Cheek D, Aragão LE, Andere L, Duarte B (2017) Development of a Point-based Method for Map Validation and Confidence Interval Estimation: A Case Study of Burned Areas in Amazonia. J Remote Sensing & GIS 6:193. doi: 10.4172/2469-4134.1000193
Copyright: © 2017 Anderson LO, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Forest fires and their associated emissions are a key component for the efficient implementation of the Reducing Emissions from Deforestation and Forest Degradation (REDD+) policy. The most suitable method for quantifying large scale fire-associated impacts is by mapping burned areas using remote sensing data. However, to provide robust quantification of the impacts of fire and support coherent policy decisions, these thematic maps must have their accuracy quantitatively assessed. The aim of this research is to present a point-based validation method developed for quantifying the accuracy of burned area thematic maps and test this method in a study case in the Amazon. The method is general; it can be applied to any thematic map consisting of two land cover classes. A stratified random sampling scheme is used to ensure that each class is represented adequately. The confidence intervals for the user’s accuracies and for both overall accuracy and area error are calculated using the Wilson Score method and Jeffrey Perks interval, respectively. Such interval methods are novel in the context of map accuracy assessment. Despite the complexity of calculation of the confidence intervals, their use is recommended. A spreadsheet to calculate point and interval estimates is provided for users.