[gdal-dev] Extracting cell values from a big image and many smaller images

[Limei Ran]

Hi:

I am using GDAL cpp library to create a program. The program will 
ultimately generate a statistic table with cell values from a very big 
modeling grid domain image (almost whole US) and many smaller land use 
images within the big image.

I need to go through all the small image pixels to match grid cell 
values in the big image. There are many ways to read image data in line 
and blocks from GDALRasterBand class.

Since I am new in using GDAL libraries, I appreciate any suggestion you 
might have in accessing the images efficiently.

Thanks,

Limei