Abstract: According to the digitizing procedure of spatial data of forest resources by designing survey,the causes of spatial data error was analyzed in detail and some suggestions were put forward to guarantee the precision of spatial data. The methods of collecting control points and transforming the spatial data to rectify error were also introduced. By selecting control points of all data automatically and making the relationship between the coordination of map and actual coordination by construct triangular irregular network (TIN) for every standard map,the accuracy of data and the work efficiency of transforming was improved. This method had been adopted in the rectification of the spatial data of forest resources by designing survey in Fujian Province and achieved a reasonable result.

Key words: digital forestry, forest resources, error, rectification, spatial data