ESTIMATION OF TAIWAN'S FORESTED AREAS FROM CLASSIFIED NDVI MAPS FROM NOAA AVHRR DATA

摘要

The goal of this study is by applying NOAA AVHRR data in delineating NDVI maps throughout Taiwan, which can be utilized in surveys of forested areas. Due to the frequent appearance of clouds, the composite NDVI maps were conducted in a monthly basis where the monthly and seasonal variations of the NDVI values around mountainous areas were analyzed. The result showed that the total forest area assessed by the NDVI value reached 54.5%. This percentage was rather close to the surveys conducted on the surface, which was 58%, proving our procedure to be rather practical.