Gdal creates invalid RAW files

wagscat123 · 01-12-2017, 03:01 PM

Hi all,

I'm using the following Gdal command to get png and tiff files into the Photoshop RAW format:

Code:

gdal_translate -ot UInt16 -of png -outsize 193 193 -scale 3d_test_at2-trimmed.png 3d_test_at2_gd.raw

Except with GTiff thrown in with the tiff file.

When I run these, the output RAW files do not open in a program I'm importing them into, nor into Photoshop or UFRAW. Both report that the file is invalid, or in the wrong format.

Any tips/ideas on why this is so? This seems to be a bit oscure for Google to answer.

Brains · 01-12-2017, 06:26 PM

I believe the Photoshop raw file format is .dng, all other raw formats are typically camera manufacturer specific.

John VV · 01-12-2017, 06:47 PM

gdal will

you told the program this " -ot UInt16 -of png "
so it will be a 16 ushort unsgined grayscal png

that will not be a "raw" image

technically gdal dose not output a raw image but a few formats are very close

i normally use EHdr

Code:

gdal_translate -of EHdr 16ppd.geo_bathy.cub 16ppd.geo_bathy.raw
------
Input file size is 5760, 2880
0...10...20...30...40...50...60...70...80...90...100 - done.

file list

Code:

├── 16ppd.geo_bathy.cub
├── 16ppd.geo_bathy.hdr
├── 16ppd.geo_bathy.prj
├── 16ppd.geo_bathy.raw
└── 16ppd.geo_bathy.raw.aux.xml

read the *.hdr text file for the image information
in this case the ISIS3 cub is a 16 bit signed DEM

Code:

BYTEORDER      I
LAYOUT         BIL
NROWS          2880
NCOLS          5760
NBANDS         1
NBITS          16
BANDROWBYTES   11520
TOTALROWBYTES  11520
PIXELTYPE      SIGNEDINT
ULXMAP         -20033913.3899541
ULYMAP         10015217.3380241
XDIM           6957.4278138406
YDIM           6957.4278138406
NODATA         -32768

and opining the raw using G'Mic

Code:

gmic 16ppd.geo_bathy.raw,short,5760,2880

http://imgbox.com/vhIAObwW

.

wagscat123 · 01-13-2017, 10:28 AM

I ended up ruling out the method of converting my heightmaps to Unity3D's preferred RAW format, and don't need to fight it out with Gdal anymore. Many thanks for the tips though, if I need to to this again at some point later I can refer back to this thread.