1、下载免费的dem数据
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/ab966c6b0ce265e7f3aa7ccc9f23beb9773eb739.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/777f3fc2bbd6e1d0a24d82d50d254193cfe8af39.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/cfa9ae04541bd10f2583152eba0e1799e82aa739.jpg)
2、使用ArcMap 10.1
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/0cdb2f0e1799e92a661d5af4e1fec314f0c5a039.jpg)
3、打开Arctool Box
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/6bbfdd14f1c595eea364af9327530688902c9a39.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/906dbbcadce89048ea596f43130e5f2042719239.jpg)
4、Asscii to Raster
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/994f412043715fdbc685a18e468920c5270f8c39.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/ccc83ec5260f88352b2f416ace07880139708639.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/3931cb413a8ca6085baa8c48db8c9bcec6f8fe39.jpg)
5、设置Raster的坐标
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/5c9c964ce54a2f27ef4930b2e00192dd3240f439.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/b7b28f87031c99c0be5af932af2fa872951fed39.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/955ea0e434daf05e538561c5751d96d81919e539.jpg)
6、设置Layers的坐标
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/6061b9cd0c6efbf220156d63127bbbf4db58da39.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/739bc049610f8b5686a236dc9ce951e10ff8d339.jpg)
7、创建mask
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/0fb94656d53da824eb4fd466306651598440cb39.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/05a320a23a42a07a9db6a487673834bb18efc139.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/c33acc828689a146ff17f64df4bd4c7c35b3343e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/3d002dbad341037db091d1c2a9bc7dc5ce672d3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/23fd63c5cf672b5f82e01d223314f4d0b403273e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/b955ead0b503c8d21b585ffa498333bf3aef213e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/340e4eb8b43ea8db31ece286189c2cf7deb2163e.jpg)
8、大致确定所要研究流域的经纬度
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/fb738d9c2cf7dfb2b7bfd698d01b1edef5dc133e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/1f9feadca039131fbc4acb6de275f2c4ed990a3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/6834ecc4ec9959437ca7504a95425d6b05d1043e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/1f03436b04d14929e42e21a763e5eceeacbc7e3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/3852f6e5eceeadbc3d895fc4cd18dfdae53b7b3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/4759c1dae43b3b868b8757e3185653bbf920753e.jpg)
9、在ArcMap上面点出流域出口附近点
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/52fae62064fb960ba1871dd58fa355e982ae6c3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/54a89daee8d7592a7449f8cc9f31dfb6336c673e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/988e1c532f6323854190fa25cce833e038725d3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/3c42a5ea3e863048cbe5cf60c33104ebf7a7523e.jpg)
10、选取研究区域
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/5e4e9c2b74ee1c32f8be499807f1d8a727334b3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/cca2552c56ee7b7f3ba864c16ef4fcf5ef0d413e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/0da37be7340f6478dd85a60dfd3e21c2bad6b53e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/40d2d0e8b004541b07a9ea92869a310e1699a63e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/430174fec314f1c5744859753c27ac5307889d3e.jpg)
![ArcMap 10.1、数字高程提取数字水系：[1]1](https://exp-picture.cdn.bcebos.com/dda98e4800fc77f774a84794c8715fdb3720903e.jpg)
ArcMap 10.1、数字高程提取数字水系：[1]1
时间：2024-10-12 00:48:431、下载免费的dem数据
2、使用ArcMap 10.1
3、打开Arctool Box
4、Asscii to Raster
5、设置Raster的坐标
6、设置Layers的坐标
7、创建mask
8、大致确定所要研究流域的经纬度
9、在ArcMap上面点出流域出口附近点
10、选取研究区域