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sat-fetch

Sat-fetch is a Python 3 library and command line tool for fetching, warping, and clipping remote imagery datasets. Sat-fetch loads scenes from a a STAC GeoJSON file, takes in a user AOI and list of asset keys to download. Sat-fetch will then perform windowed reads of the remote imagey if possible and save a multi-band image of all the assets, clipped to the user provided AOI.

Sat-fetch provides all the same functionality as sat-search, except has some additional features that require the use of GDAL and other libraries (sat-search is very lightweight requiring nothing but the Python requests library).

Installing

Install from PyPi

$ pip install sat-fetch

Sat-fetch has a several dependencies on geospatial libraries, so to ease installation a Docker image is also available.

$ docker fetch sat-utils/sat-fetch:latest

Using sat-fetch

The sat-fetch Command Line Interface (CLI) can be used just as the sat-search CLI:

$ docker run --rm -v $PWD:/home/geolambda/work -it sat-utils/sat-fetch:latest sat-fetch -h

with the only difference being the addition of a new argument to the CLI, fetch. Whereas download downloads the original file as is, fetch only gets the area of the image within the intersects AOI, clips the output image to to the AOI, and stacks all the bands desired into a single file.

Development

$ docker build . -t sat-utils/sat-fetch:latest

$ docker run -v ${PWD}:/work --rm -it sat-utils/sat-fetch:latest

Known issues

  • sat-fetch does not work with GDAL 2.2.3 (and perhaps earlier versions) due to this bug which was fixed in 2.2.4. GDAL 2.2.3 is the default version on Ubuntu 18.04, use the UbuntuGIS unstable repository to update GDAL.

About

sat-fetch is part of a collection of tools called sat-utils.

About

Fetch satellite data for AOIs

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