Abstract: Facing the need of forest resource investigation,we fused the high spatial panchromatic of 2 m and the multispectral data of 10 m by using four methods:IHS transform,principal component transform,multiplicative transform and pansharpening.The fusion images were compared and analysed by using both visual judgments and statistical method.The result indicated that pansharpening fusion image has more clear texture and the best ability of spectral preservation.Therefore,the pansharpening fusion is suitable for the forest resource investigation.

Key words: TH Mapping Satellite-I, forest resource investigation, fusion algorithm, fusion evaluation