USING FOSS4G TOOLS WITH RDNDVI TECHNIQUES TO ANALYZE FLOOD HAZARD IN TROPICAL SE ASIA AREA AT WANG THONG RIVER BASIN, PHITSANULOKE, THAILAND.
Kittituch Naksri | Chaiwiwat Vansarochana
This study aims to find the results of using a free disaster mapping application developed on Google Earth, named “Hazmapper”. This tool allows users to create maps and GIS products from Sentinel or Landsat datasets without the high time and cost usually needed for traditional analysis.
The initial design of the HazMapper program used indicators based on the Normalized Difference Vegetation Index (NDVI). Specifically, it developed the relative difference NDVI (rdNDVI) to identify areas where vegetation was removed after natural disasters. Because these indicators rely on vegetation, HazMapper is unsuitable for desert or polar regions, which means appropriate for tropical areas.
Using the rdNDVI indicator for different years in the same area and comparing the average absolute error (MAE) of all results to test the effectiveness of the Hazmapper model in application to flooded areas.
FOSS4G-Asia 2024 - Abstracts - General Track
Room34-1104