第一步:下载高程数据打开水经注万能地图下载器,切换地图到谷歌地球高程数据,框选下载需要进行计算的范围并导出为dat格式,坐标系选择西安80。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/4034970a304e251fdd9bb34caa86c9177f3e5311?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
第二步:展高程点打开南方CASS,点击“绘图处理”→“展高程点”,将高程点展进来。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/8d5494eef01f3a290a62827a9425bc315d607cdf?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
第三步:计算土石方得方法。
1.使用“pl”命令画一个多段线将高程点围起来,使用“c”命令闭合。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a2cc7cd98d1001e9354743bbb50e7bec54e7970e?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
2.点击“工程应用”→“方格网法土石方计算”(图5)
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/09fa513d269759eef8a8347fbffb43166c22df8e?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
3.选择上画的多段线,在弹出的“方格网土石方计算”对话框内选择上生成的dat文件,设置好目标高程
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/f636afc379310a5538b38940ba4543a9832610ea?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
4.点击“确定”后生成的效果如图所示。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/a9d3fd1f4134970a76b9479b98cad1c8a6865dbf?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)