基于经纬度坐标的栅格图像配准与裁剪

摘要

This paper recorded the study for the raster images registration and image clipping with only latitude and longitude coordinates in ArcGIS.Comparison experiment for whether the registration based on latitude and longitude coordinates in ArcGIS is supported has been conducted.The results show that:when the reference image and image to be registered only exist inclusion relation and if the image to be registered cannot provide the geographic coordinate of GCPs,it is correct and feasible to conduct the reg istration based on the latitude and longitude coordinates with ArcGIS.Registration and clipping for the Geological map of Sichuan province and a basin in Sichuan were done according to the above conclusion,with a very satisfying result was achieved,namely the registration precision is 0.485 9.%对只含经纬度坐标的栅格图像在配准与裁剪过程中的问题进行研究分析,在前人经验的基础上,针对ArcGIS是否支持基于经纬度坐标的配准进行了验证.结果表明:在参照图与待配准图仅存在包含关系且待配准图不能提供地面控制点GCP的地理坐标时,采用ArcGlS进行基于经纬度坐标的配准是正确且可行的,并以此结论对四川某流域与四川省地质图进行配准和裁剪,配准精度为0.4859.