propublica / schooner-tk

A collection of (hopefully) useful utilities for working with satellite images.
MIT License
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Docs on schooner-blend #8

Closed petulla closed 9 years ago

petulla commented 9 years ago

Hi

This seems like a great library. Thanks for putting it together. I'm trying to understand how to use the blend routine. The example workflow provided shows what blend outputs look like, but only suggests that they are interesting. Indeed they are! I am wondering if there is more documentation on what the blended images can be used for to create cloudless imagery.

thejefflarson commented 9 years ago

Sorry for the late reply! Basically blending is useful as a way to remove clouds, if you take 6 different Landsat scenes you can by pixel average out the clouds.

One caveat that's not quite expressed in the blog post, is that the images need to be both the same size and the same group coordinates, and that's why the image came out all blurry in that post.

On Friday, July 10, 2015, Sam Petulla notifications@github.com wrote:

Hi

This seems like a great library. Thanks for putting it together. I'm trying to understand how to use the blend routine. The example workflow provided shows what blend outputs look like, but only suggests that they are interesting. Indeed they are! I am wondering if there is more documentation on what the blended images can be used for.

— Reply to this email directly or view it on GitHub https://github.com/propublica/schooner-tk/issues/8.

thejefflarson commented 9 years ago

You can see an example workflow with the gdal_translate commands here:

https://github.com/propublica/schooner-tk/issues/6#issuecomment-120476093