Relationship between Tasseled Cap Transformation and Normalized Difference Vegetation Index in the City of Chiang Mai

Abstract

This research aimed to study relationship between Tasseled Cap Transformation (TCT) and Normalized Difference Vegetation Index (NDVI) in the city of Chiang Mai. The vegetation indices indicated the characteristics of land use and land cover in a part of vegetation, soil and water which applied for Chiang Mai city and surrounding area with rapid changes of area. Landsat 8 OLI satellite images used in this research with geometric correction and atmospheric correction before analyzed. This research focused mainly on sampling of 203 points covering of 5 types land uses which were urban and build up land, agricultural land, forest land, water body and miscellaneous land. Data were gathered through Pearson Product Moment Coefficient and shown equation from relationship between variables. The study found that there was high positive correlation between Tasseled cap greenness and NDVI (r = 0.897, p <.01). The equation was Tasseled cap greenness = 0.275(NDVI) – 0.0623 (R2 = 0.81). Meanwhile, there was low negative correlation between Tasseled cap brightness and NDVI (r =-0.301, p<.01). On the other hand, there was low positive correlation between Tasseled cap wetness and NDVI (r =0.322, p<.01).