首先解释一下BP文件:
后缀名为BP的文件时卫星对地面遥感数据的ASCII文本文件(google,then u'll get it)
我的海深BP文件是保密文件所以不能公开,sorry
我用的是windows的GDI绘制的代码如下
//
BP.cpp : Defines the entry point for the application.
//
#include
"
stdafx.h
"
#include
"
BP.h
"
#include
<
iostream
>
#include
<
fstream
>
#include
"
WINGDI.H
"
using
namespace
std;


#define
MAX_LOADSTRING 100

//
Global Variables:
HINSTANCE hInst;
//
current instance
TCHAR szTitle[MAX_LOADSTRING];
//
The title bar text
TCHAR szWindowClass[MAX_LOADSTRING];
//
the main window class name

//
Forward declarations of functions included in this code module:
ATOM MyRegisterClass(HINSTANCE hInstance);
BOOL InitInstance(HINSTANCE,
int
);
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
INT_PTR CALLBACK About(HWND, UINT, WPARAM, LPARAM);

int
APIENTRY _tWinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPTSTR lpCmdLine,
int
nCmdShow)

...
{
UNREFERENCED_PARAMETER(hPrevInstance);
UNREFERENCED_PARAMETER(lpCmdLine);

// TODO: Place code here.
MSG msg;
HACCEL hAccelTable;

// Initialize global strings
LoadString(hInstance, IDS_APP_TITLE, szTitle, MAX_LOADSTRING);
LoadString(hInstance, IDC_BP, szWindowClass, MAX_LOADSTRING);
MyRegisterClass(hInstance);

// Perform application initialization:
if (!InitInstance (hInstance, nCmdShow))

...{
return FALSE;
}

hAccelTable = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDC_BP));

// Main message loop:
while (GetMessage(&msg, NULL, 0, 0))

...{
if (!TranslateAccelerator(msg.hwnd, hAccelTable, &msg))

...{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
}

return (int) msg.wParam;
}



//
//
FUNCTION: MyRegisterClass()
//
//
PURPOSE: Registers the window class.
//
//
COMMENTS:
//
//
This function and its usage are only necessary if you want this code
//
to be compatible with Win32 systems prior to the 'RegisterClassEx'
//
function that was added to Windows 95. It is important to call this function
//
so that the application will get 'well formed' small icons associated
//
with it.
//
ATOM MyRegisterClass(HINSTANCE hInstance)

...
{
WNDCLASSEX wcex;

wcex.cbSize = sizeof(WNDCLASSEX);

wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_BP));
wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wcex.lpszMenuName = MAKEINTRESOURCE(IDC_BP);
wcex.lpszClassName = szWindowClass;
wcex.hIconSm = LoadIcon(wcex.hInstance, MAKEINTRESOURCE(IDI_SMALL));

return RegisterClassEx(&wcex);
}

//
//
FUNCTION: InitInstance(HINSTANCE, int)
//
//
PURPOSE: Saves instance handle and creates main window
//
//
COMMENTS:
//
//
In this function, we save the instance handle in a global variable and
//
create and display the main program window.
//
BOOL InitInstance(HINSTANCE hInstance,
int
nCmdShow)

...
{
HWND hWnd;

hInst = hInstance; // Store instance handle in our global variable

hWnd = CreateWindow(szWindowClass, szTitle, WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

if (!hWnd)

...{
return FALSE;
}

ShowWindow(hWnd, nCmdShow);
UpdateWindow(hWnd);

return TRUE;
}

//
//
FUNCTION: WndProc(HWND, UINT, WPARAM, LPARAM)
//
//
PURPOSE: Processes messages for the main window.
//
//
WM_COMMAND - process the application menu
//
WM_PAINT - Paint the main window
//
WM_DESTROY - post a quit message and return
//
//
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)

...
{
int wmId, wmEvent;
PAINTSTRUCT ps;
HDC hdc;
ifstream BPin;
BPin.open("BP.txt");//打开bp文件 格式为360*530
int Deep;
int x=0,y=0;

switch (message)

...{
case WM_COMMAND:
wmId = LOWORD(wParam);
wmEvent = HIWORD(wParam);
// Parse the menu selections:
switch (wmId)

...{
case IDM_ABOUT:
DialogBox(hInst, MAKEINTRESOURCE(IDD_ABOUTBOX), hWnd, About);
break;
case IDM_EXIT:
DestroyWindow(hWnd);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
break;
case WM_PAINT:
hdc = BeginPaint(hWnd, &ps);
while(BPin.good() && !BPin.eof())//文件正常打开&&未结束

...{
if(x<360)

...{
BPin>>Deep;
if(Deep<0)

...{
SetPixel(hdc,x,y,RGB(255,255,255));//DEEP<0 为陆地着白色
}
else

...{
SetPixel(hdc,x,y,RGB(0,0,255-2*Deep));//根据DEEP值着色
}
x++;
if(x>=360)

...{
x=0;
y++;//控制循环量
}
}
}
EndPaint(hWnd, &ps);

break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, message, wParam, lParam);
}
return 0;
}

//
Message handler for about box.
INT_PTR CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)

...
{
UNREFERENCED_PARAMETER(lParam);
switch (message)

...{
case WM_INITDIALOG:
return (INT_PTR)TRUE;

case WM_COMMAND:
if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL)

...{
EndDialog(hDlg, LOWORD(wParam));
return (INT_PTR)TRUE;
}
break;
}
return (INT_PTR)FALSE;
}
效果图:

程序虽然简单,但有个不足,应该把文件值都读到数组中再着色,这样效率高
读者可自行改之