Refactor and unify the interface for the raster image, contours, and vector overlay. #112

	name: "Sphinx documentation build check"
	on:
	- pull_request

	jobs:
	docs:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v1
	- uses: ammaraskar/sphinx-action@master
	with:
	docs-folder: "docs/"

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