地理信息TIF文件转出TFW

XDSoft

If you only have GEOTIFF and lost the TFW file, you can get it through the XDRX API function xdrx-geotiff->worldfile

Usage:

1. Command: (xdrx-geotiff->worldfile "D:\\Rectangle_#8.tif")
   
2. "D:\\Rectangle_#8.tfw"
   
3. 
   

Command: (xdrx-geotiff->worldfile "D:\\Rectangle_#8.tif")<br /> "D:\\Rectangle_#8.tfw"<br /> <br />

Open D:\\Rectangle_#8.tfw:

0.5971642835
0.0000000000
0.0000000000
-0.5971642835
13783278.1130216978
5143915.5115256160

The following function can determine whether an image file supports geographic information

1. Command: (xdrx-geotiff-isa "D:\\Rectangle_#8.tif")
   
2. 
   
3. (1.37833e+07 5.14392e+06 0.597164 -0.597164 0.0 0.0)
   

Command: (xdrx-geotiff-isa "D:\\Rectangle_#8.tif")<br /> <br /> (1.37833e+07 5.14392e+06 0.597164 -0.597164 0.0 0.0)<br />

Return:
1. X coordinate of the upper left corner of the image (geographic coordinates)
2. Y coordinate of the upper left corner of the image (geographic coordinates)
3. Actual geographic unit length of each pixel in the X direction
4. Actual geographic unit length of each pixel in the Y direction
5. X direction rotation angle
6. Y direction rotation angle

Get the maximum X and Y pixel coordinates of a geospatial image file

1. Command: (xdrx-tiff-rastersize "D:\\Rectangle_#8.tif")
   
2. (30928 28017)
   

Command: (xdrx-tiff-rastersize "D:\\Rectangle_#8.tif")<br /> (30928 28017)<br />

return:
1.X pixel
2.Y pixel

Get the number of bands in an image dataset

1. Command: (xdrx-geotiff-bandcount "D:\\Rectangle_#8.tif")
   
2. 3
   

Command: (xdrx-geotiff-bandcount "D:\\Rectangle_#8.tif")<br /> 3<br />

zhong2013

给楼主提个建议，从照片文件中提取位置信息，现在手机的照片都有位置信息，在属性中是EXIF格式的经纬度，vlisp想直接提取到这个位置数据好像有点麻烦。API中可以增加这个功能么，有了经纬度就可以把照片插入到图上了。