广东林区GPS GIS TM遥感图象的几种叠合方法之精度研究

STUDY ON THE PRECISION OF SEVERAL SUPERIMPOSING WAYS OF GPS,GIS AND TM REMOTE SENSING IMAGE IN GUANGDONG FOREST

通过对ＧＰＳ、ＧＩＳ、ＴＭ遥感图象叠合的三种方法进行比较、分析，认为在广东林区，采用以ＧＰＳ坐标数据为主，结合ＧＩＳ，辅以目视判读的叠合方法，进行ＧＰＳ、ＧＩＳ、ＴＭ遥感图象叠合效果最好。在ＧＰＳ、ＧＩＳ、ＴＭ遥感图象叠合前，必须对ＴＭ遥感图象作局部几何纠正，特别是在植被组成复杂，林下植被多且高，中等郁闭度，坡位中部，坡度陡的地方。

Three superimposing ways of GPS,GIS and TM remote sensing image were comparatively analyzed. The result reveals that in Guangdong forest area, it is the best way to superimpose GPS, GIS, TM remote sensing image by using GPS coordinate data, combining with GIS, and visual interpretation of the precise position of GPS points on TM. Before superimposing, the TM remote sensing image should be geometrically corrected particulaly on where vegetation composition is complex, undergrowth is dense and high, canopy is medium density, or middle hillside and steep slopes exist. \;