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设计人员拿到的工程坐标系等高线CAD图如何加载进图新地球
2022-06-26 14:46:00 【三维GIS那点事_王跃军】
序:
一个朋友拿到了一份CAD格式的图纸,里面有等高线,想把它作为三维地形底图加载到图新地球。让其他同事帮忙转换,同事用Arcgis给他输出了一份tif格式的地形,但这个数据实际检查发现是【影像】
这里给出cad格式的数据,转换为tif格式地形的教程,并在lsv里面加载。
一、GlobalMapper打开CAD图纸
注意,GlobalMapper打开CAD一定要知道它对应的投影文件,打开之后效果如图
注:此处最开始用错了投影,导致坐标范围越界,本数据坐标是带带号的

二、筛选出用于生成地形的等高线

属性表如下图:



筛选出了2934条等高线
ctrl+A全选,右键复制

直接ctrl+V粘贴


三、生成等高线



四、生成图层的范围:



五、按范围对生成的地形进行精确裁剪


六、输出地形


七、图新地球加载生成的tif
注:投影信息正确的直接加载地形就可以了(建议使用地形批处理转为lrp)
如果投影信息是地方坐标系,请使用【导入tif】配置工程坐标系进行导入

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