Abstract：Using the method of SIFT algorithm automatically extracts the control point and the tie point,block adjustment for block ortho-rectification to solve the problems that GF-1 satellite image ortho-rectified image edge matching accuracy is low and prone to misalignment. Through the block ortho-rectification test of GF-1satellite WFV sensor image shows that SIFT algorithm extracts a large number of control points and tie points,the position accuracy RMS values are less than 1 pixel in heading and scanning direction,adjacent image edge is achieving a seamless mosaic level,good results have been achieved.

Keyword：GF-1;RPC model;block adjustment;ortho-rectification;