地理学报 ›› 1989, Vol. 44 ›› Issue (4): 459-468.doi: 10.11821/xb198904009
• 论文 •
Abstract: In our country, most of thermatic mapping using Landsat image were interpreted visually.The products of interpre tation need to be transmitted to type boundary. It suggests theproblem how by using bulk process image to do geornetric corrccting and transferring.Under the condition in shortage of CCT, the geometric correcting, the mixed process usingcomputer-optical equipment is an available method. The present paper analyzed the re-sults of geometric correcting of positive or negative film on the OR-1 ortho-rectifier. Theconclusion shows that it can reach such precision that the error is just 1-2 pixel. But thedensity of horizontal section and the density of vertical section in measured area have a greatinference on precision. If the height varies greatly or the density of stream network is big,the error on corrected images is big either.The geometric correcting can also be done after interpretation-affine transform the uncor-rected type boundary. Many articles and the present paper show that, the lateral deformation is1.4-2.3 times more than vertical one. Thus, optical-mechanical affine transformation beco-mes the major method of geometric transformation which makes the precision a lower lower. Italso can be done by Zoom Transfer Scope or professional duplicator which has capability ofcompressing in X and Y direction. The location error of this method is about 0.4 mmFrom the view of mapping, the geographic precision on middle scale image is higher thanthat on geographical base map through many times of scale generalization. So, the type bound-ary interpreted from Landsat image, when thansferred to the base map, cannot coincide properlywith geographic elements. The roots of error lie in the errors of base map. So, when transferr-ing the thematic type boundary to the base map, it is necessary to transfer, the geographic corre-lation according to the stream network on map.
Landsat image: Thematic type,
Geometric rectifi cation,
Geographic relatively transformation
毛赞猷. 卫星影象上专题类型转绘方法的分析[J]. 地理学报, 1989, 44(4): 459-468.
Mao Zanyou. THE METHOD OF BOUNDARY TRANSFORMATION OFTHEMATIC TYPE ON LANDSAT IMAGE[J]. Acta Geographica Sinica, 1989, 44(4): 459-468.
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