5

Is there in Rasterio any way to create a mosaic?

I tried to google it, but I couldn't find anything, maybe someone else already used it.

I want to use some open source possibilities, I already know of possibility to use gdalmerge, gdalwarp.

Improve this question
  • 1
    That would be merge from the rasterio.merge module, or rio merge from the command line. – Loïc Dutrieux Jul 11 '17 at 16:50
  • Thank you. I like the vision of using CLI however I found only 'rio-merge-rgba', is there possibility that 'rio-merge' is over? – J.Coo Jul 11 '17 at 17:41
  • 1
    It's rio merge without the dash. rio --help will give you the list of all CLIs, and rio merge --help will give you more specific help for that command in particular. – Loïc Dutrieux Jul 11 '17 at 17:49
  • Thank you very much, you are really helping me. Do you maybe know something about resampling, please? In rio-merge-rgba I read it doesn't work with bilinear and there is forced nearest neigbour. – J.Coo Jul 11 '17 at 19:04
  • 1
    If you need to resample then I suggest you use gdalwarp instead. It does mosaicking, reprojecting/resampling all at once. – Loïc Dutrieux Jul 11 '17 at 19:45
3

Rasterio's rio warp command (see https://github.com/mapbox/rasterio/blob/master/rasterio/rio/warp.py) can be used to make image mosaics. With a little work you could use that function in Python code, not just as a command line program.

Improve this answer
9
import rasterio
import numpy as np
from rasterio.merge import merge
from rasterio.plot import show

src1 = rasterio.open('/path/to/your/raster1')
src2 = rasterio.open('/path/to/your/raster2')

# Taking a peek to make sure these are the rasters you want...
show(src1)
show(src2)

srcs_to_mosaic = [src1, src2]

# The merge function returns a single array and the affine transform info
arr, out_trans = merge(srcs_to_mosaic)

show(arr) # Check to make sure the merge looks good.

I was just looking for a similar technique and found this method based on the rasterio/merge.py function given here.

You can check out my example with two orthomosaic images here.

However, I'm not sure this is the best method...no doubt the dude himself @sgillies has more insight into this!

Improve this answer

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.