以下简单的代码实现了ArcGIS支持的栅格向Golden software的Surfer ASCII grid的格式转化。需要注意的是，ArcGIS的栅格左上为坐标原点，向下向右为正。而Surfer grid是左下是坐标原点，向上向右为正。

Here I will show a class that implements the major functionality to convert any Raster file supported by ArcGIS to Surfer ASCII grid format. The resulting Surfer grid can be read by Surfer with version 6 or higher. One point we need to keep in mind, ArcGIS raster stores data in row-major order, right and downwards being positive, while Surfer grid takes lower left corner as the original, right and upwards being positive.

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using ESRI.ArcGIS.Geodatabase;
using ESRI.ArcGIS.DataSourcesRaster;
using ESRI.ArcGIS.esriSystem;
using ESRI.ArcGIS.Geometry;

namespace RasterToSurferGrid
{
    /// <summary>
    /// A wrapper class for Surfer ASCII grid file
    /// </summary>
    class SurferGrid
    {
        string id = "DSAA";
        int nx;//columns
        int ny; //rows
        double xlo; //the minimum X value of the grid
        double xhi; //xhi is the maximum X value of the grid
        double ylo;
        double yhi;
        double zlo;
        double zhi;
        List<double> data; //the grid is stored in row-major order, with the lowest row (minimum Y) first

        public SurferGrid(string rasterPath)
        {
       &n