C/C++下读取ENVI栅格文件格式的示例代码

ENVI
description = {
  Canon City, Colorado, Landsat TM, Calibrated to Reflectance }
samples = 640
lines   = 400
bands   = 6
header offset = 0
file type = ENVI Standard
data type = 1
interleave = bsq
sensor type = Landsat TM
wavelength units = Micrometers
z plot range = {0.00, 100.00}
z plot titles = {Wavelength, Reflectance}
band names = {
 TM Band 1, TM Band 2, TM Band 3, TM Band 4, TM Band 5, TM Band 7}
wavelength = {
 0.48500, 0.56000, 0.66000, 0.83000, 1.65000, 2.21500}

/*
 C++读取ENVI格式技术测试代码
 输出不同数据类型的二进制文件
 
 Author: DYQ 2011年6月2日
 
  BBS： http://bbs.esrichina-bj.cn/ESRI/forum-28-1.html
  E-Mail: dongyq@esrichina-bj.cn
  Blog: http://hi.baidu.com/dyqwrp
 */
PRO test_out_bin
  outdir = 'c:\temp\'
  if file_test(outdir,/directory) ne 1 then file_mkdir,outdir
  //字节byte
 OPENW,lun,outdir+'a.dat',/get_lun
 WRITEU,lun,BINDGEN(10)
  FREE_LUN,lun
  //整型int
 OPENW,lun,outdir+'b.dat',/get_lun
 WRITEU,lun,INDGEN(10)
  FREE_LUN,lun
  //浮点float
 OPENW,lun,outdir+'c.dat',/get_lun
 WRITEU,lun,FINDGEN(10)
  FREE_LUN,lun
  //长整型long
 OPENW,lun,outdir+'d.dat',/get_lun
 WRITEU,lun,LINDGEN(10)
  FREE_LUN,lun
  //双精度double
 OPENW,lun,outdir+'e.dat',/get_lun
 WRITEU,lun,DINDGEN(10)
  FREE_LUN,lun
END

//C++读取ENVI格式技术测试代码
#include "stdafx.h"
#include "iostream.h"
int main(int argc, char* argv[])
{
      printf("Hello ! Successful Using C++! ^_^ \n");
      int i,n;
      FILE*fp;
      //二进制字节型
      char *bdata=new char[10];
      fp=fopen("c:\\temp\\a.dat","rb");
      n=fread(bdata,1,10,fp);
      fclose(fp);
      for(i=0;i<10;i++)
      {
             cout<<"二进制";
             cout<<i<<":"<<short(bdata[i])<<endl;
      }
   //二进制整型文件
      short int *idata=new short int[10];
      fp=fopen("c:\\temp\\b.dat","rb");
      n=fread(idata,2,10,fp);
      fclose(fp);
      for(i=0;i<10;i++)
      {
             cout<<"整型";
             cout<<i<<":"<<idata[i]<<endl;
      }
      //二进制浮点文件
      float *fdata=new float[10];
      fp=fopen("c:\\temp\\c.dat","rb");
      n=fread(fdata,4,10,fp);
      fclose(fp);
      for(i=0;i<10;i++)
      {
             cout<<"浮点";
             cout<<i<<":"<<fdata[i]<<endl;
      }
      //二进制长整型文件
      long *ldata=new long[10];
      fp=fopen("c:\\temp\\d.dat","rb");
      n=fread(ldata,4,10,fp);
      fclose(fp);
      for(i=0;i<10;i++)
      {
             cout<<"长整型";
             cout<<i<<":"<<ldata[i]<<endl;
      }
   //双精度double
      double *ddata=new double[10];
      fp=fopen("c:\\temp\\e.dat","rb");
      n=fread(ddata,8,10,fp);
      fclose(fp);
      for(i=0;i<10;i++)
      {
             cout<<"双精度型";
             cout<<i<<":"<<ddata[i]<<endl;
      }
      return 0;
}