[Gdal-dev] define block size for GTIFF

[Xiaodong Zhang]

Hi,

We're using GDAL to read in a binary raw image (already in projected format)line
by line and wrtie out as a GTIFF image after SetGeoTransform and SetProjectioin
using:
for (j=0,j<Yvalue;j++){
fread(rowData,sizeof(float),Xvalue,inFile);
poBand->RasterIO(GF_Write,0,j,Xvalue,1,rowData,Xvalue,1,GDT_Float32,0,0);}

I'm wondering how can I set a block size and how to use it. Will that be faster
than what I'm doing now.

Also I know GTIFF has an option of compressing image, does GDAL support that?

Thanks
Xiaodong


Quoting "Chapman, Martin" <MChapman at sanz.com>:

> Wow, that's power scripting.  Very nice!
>  
> Martin
> 
> 	-----Original Message----- 
> 	From: Frank Warmerdam [mailto:fwarmerdam at gmail.com] 
> 	Sent: Thu 2/24/2005 10:59 AM 
> 	To: gdal-dev at remotesensing.org 
> 	Cc: 
> 	Subject: [Gdal-dev] Fwd: Thanks for GDAL
> 	
> 	
> 
> 	Folks,
> 	
> 	I received this today, and thought there might be other
> 	interested in using GDAL with Blender.
> 	
> 	---------- Forwarded message ----------
> 	From: Chris Soriano <chris.soriano at gmail.com>
> 	Date: Thu, 24 Feb 2005 09:49:42 -0800
> 	Subject: Thanks for GDAL
> 	To: warmerdam at pobox.com
> 	
> 	
> 	Hi Frank,
> 	
> 	Thanks for your work on GDAL. I use a 3D open source package called
> 	"Blender" (www.blender.org) that uses Python for scripting. By using a
> 	few lines in Python and the GDAL module, I was able to pull in some
> 	DEM data with no problem.
> 	
> 	Here is a discussion of my script with some screenshots:
> 	http://www.elysiun.com/forum/viewtopic.php?t=38108
> 	
> 	Thanks again,
> 	Chris Soriano
> 	_______________________________________________
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> 	
> 
>