weixj2003ld,
Be aware that histogram equalization changes the pixel values. It is better
used for display purposes only.
You should choose between Byte and UInt16 or any other type based on the
range of pixel values in the raster band.
On Mon, May 17, 2010 at 5:47 AM, weixj2003ld wrote:
> Thk
Thk u for your answer.
Yes,they give the same output except Type.
Driver: PNG/Portable Network Graphics
Files: SRTM_GTOPO_u30_n090e060.png
Size is 4800, 6000
Coordinate System is `'
Corner Coordinates:
Upper Left (0.0,0.0)
Lower Left (0.0, 6000.0)
Upper Right ( 4800.0,0.0)
Lower
weixj2003ld,
I couldn't open the link.
Try "gdalinfo -mm des.png" on both the output images. I think they will both
give the same output. UInt16 should give a dark image unless you perform
histogram equalization on it.
2010/5/11 weixj2003ld
> I download a elevation data (SRTM,GTOPO30) from
> ht
I download a elevation data (SRTM,GTOPO30) from
http://glcfapp.glcf.umd.edu:8080/esdi/index.jsp
use
gdal_translate -b 1 -of PNG -ot Byte source.tif des.png
and
gdal_translate -b 1 -of PNG -ot UInt16 source.tif des.png
differently,
with parameter 'UInt16',I get a black picture,with Byte,get a
