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[EPR-API] Raster bands subsampling
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[EPR-API] Raster bands subsampling
4/5/11 9:09 PM
Hi,
I'm having some problem with EPR-API.
I have two rasters pointing to the same source area but having different sub-sampling factors:

1long xoffset = 0, yoffset = 0, xsize = 12, ysize = 10, xstep = 3, ystep = 2;
2
3raster1 = epr_create_compatible_raster(band_id, xsize, ysize, xstep, ystep);
4epr_read_band_raster(band_id, xoffset, yoffset, raster1);
5
6raster2 = epr_create_compatible_raster(band_id, xsize, ysize, 1, 1);
7epr_read_band_raster(band_id, xoffset, yoffset, raster2);


Now I would expect that holds the following relation

1for(y=0; y < raster1->raster_height; ++y)
2  for(x=0; x < raster1->raster_width; ++x)
3    epr_get_pixel_as_float(raster1, x, y) == epr_get_pixel_as_float(raster2, x*xstep, y*ystep);


Unfortunately this doesn't work and I can't figure out what is the problem.

Please, can anyone give me some hint?
Is it a bug?

regards

--
Antonio Valentino
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RE: [EPR-API] Raster bands subsampling
4/6/11 10:37 AM as a reply to Antonio Valentino.
Hi Antonio,

thanks for reporting this issue.
We will have a look at it.
I have also created an issue for this.

best wishes
Marco
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RE: [EPR-API] Raster bands subsampling
4/6/11 2:41 PM as a reply to Marco Peters.
Hi Marco,

Thank you very much.

Marco Peters:
I have also created an issue for this.


In the last days I opened a couple of issues for epr-api at https://github.com/bcdev/epr-api/issues.
I didn't realized that there is a another issue tracker on www.brockmann-consult.de for epr-api.

I apologize for the mess.

Antonio
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RE: [EPR-API] Raster bands subsampling
4/6/11 5:00 PM as a reply to Antonio Valentino.
Thanks for mentioning that you have used the issue tracker at GitHub. I didn't noticed it.
We will consolidate both and use only one of them in the future.
Yet not sure which one will survive.

Thanks for your commitment.

best wishes
Marco
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