Make tiles from GeoTiff

[andrewyushkevich]

Hi @ozak

I'd like to ask if it's possible to create tiles from GeoTiff with your lib?
I can't find such def, but maybe I miss something.

Thanks.

[ozak]

Hi @andrewyushkevich ,

I think what you want can be implemented by using some of the functions in georasters. E.g. you could use the clip function to clip the different tiles. Or the extract function. Then you can use the to_tiff function to export. Or were you thinking of something more specialized?

I hope this helps.

[andrewyushkevich]

Or were you thinking of something more specialized?

I just want to get tiles dataset typical {z}/{x}/{y} type for using with Openlayers or Leaflet.
Think, that I could cut GeoTIFF raster with your georaster lib, but I don't understand how to work with different scales in it.

[ozak]

I think you will need to use gdal2tiles see here.

[andrewyushkevich]

Yes, I've seen this lib, but gdal is quite "big" for the one thing I need.

btw, thanks for help.

[ozak]

From what I understand it is all about the name of the directories and files, right? So in principle you could use what I said and export in the correct structure. If you do figure this out, please consider posting the way you did it and submitting a PR, which may be useful to others. Sorry I do not have the time to figure this out right now. I think the main issue will be to convert to png at the end, which may require imagemagick or something similar.

[ozak]

Perhaps this may be useful to figure out what the different directory elements are. I guess for the zoom you can use one of the various functions in the library, e.g. block_reduce.

[ozak]

And this or this for the conversion.

[sposs]

I had the same issue, and I simply use the gdal_retile.py script. I had to change it a little bit because the default interface is not very nice, but overall it does the job nicely.
http://www.gdal.org/gdal_retile.html