21 November 2012 Validation of the wetlands map derived from MODIS imagery in North America
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Abstract
As wetlands are among the most important ecosystems in the world, it is becoming increasingly important to develop a wetlands map at continental or global scale. A wetlands map in North America was produced using 500 m MODIS data obtained in 2008. To assess the accuracy of the map, the quantitative accuracy assessment was performed. A stratified random sampling method was applied to collect the validation point. A total of 2400 sampling pixels were used for the accuracy assessment. The overall accuracy of the map was assessed at 80.3%. Furthermore, the wetlands map was also compared with the existing global land cover products GLC2000 and IGBP DISCover. Three wetland sites designated in the Ramsar Convention were used to compare with Landsat images. As a result, the spatial distributions of wetlands in the new map were closest to those were in Landsat images. The new map also gave more detailed spatial information on wetlands especially in the transition zone between aquatic and terrestrial area. This study indicates that MODIS data are capable for developing an improved wetlands map at a global scale.
© (2012) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gegen Tana, Husi Letu, Ryutaro Tateishi, "Validation of the wetlands map derived from MODIS imagery in North America", Proc. SPIE 8524, Land Surface Remote Sensing, 852407 (21 November 2012); doi: 10.1117/12.977222; https://doi.org/10.1117/12.977222
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