关于Surfer转MapGIS网格化文件的问题的讨论
有朋友来信询问Surfer网格化文件转MapGIS网格化文件的问题，现就我所知回答一二，有不妥之指还望各位专家明示。
本人编制了一个Surfer网格化文件转MapGIS网格化文件的小软件。它要求输入的是Surfer的明码GRD文件，转出的是MapGIS网格化DET文件。实际上单纯的Surfer网格化文件转MapGIS网格化文件方法有很多，这与数学上解题是一样的，可以使用多种方法：殊途同归。但各种方法的优势不一：
1、利用Surfer本身进行转换
如果你有Surfer软件，将Surfer网格化文件另存成二进制文件格式，MapGIS就可以直接读取了。这种方法的前提是你要安装了Surfer。而且，还有一个不足是MapGIS不能形成数据点位图；
2、利用我的小软件进行转换
这种方法是在没有安装Surfer，或者已安装了这个小软件因为使用它便利。它的优点是MapGIS可以读取DET文件进行空间分析。不足的是要求Surfer网格化文件是明码文件；
3、利用Surfer网格化另一个功能
众所周知，Surfer可以将其自身的网格化文件转成DAT明码文件，MapGIS读取DAT文件就可以进行下一步工作了，包括成数据点位图。但要作等值线图等等，还要将DAT再网格化。第二次网格化势必带来计算误差和数据圆滑，这都是数据处理工作中应当尽量避免的。当然，本人还有一款将规则DAT文件转成Surfer网格化文件的小软件，但是目前还没有上传，而且本人也不推荐使用，因为那毕竟有画蛇添足之嫌；
4、利用他人的软件进行转换
目前市面上兼容Surfer和MapGIS的转件不少，比如MRAS、MORPAS、RGIS、GEOEXPL等等都可能实现这种转换。当然前提是你要拥有这些转件。
零零总总说了不少，不知道说清楚没有，欢迎来函，或留言进行讨论。
说的很具体呀，都说全了。再不明白就得自己狠狠地钻研啦。
您好，孙老师，请教一下grd文件是怎么输出的？我现有的是全国公里网格的DEM数据，想生成grd格式。多谢您的解答。geopantao@gmail.com
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