Mapchete

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* core

* create local output directory for single GTiff output files (285)
* add process area parameter (287)
* use optimized GDAL settings for baselayer creation (291)
* raise generic MapcheteIOError on read fails (292)

* CLI

* add more baselayers in ``serve`` (278)
* add ``cp`` command (282)
* enable ``serve`` to host multiple mapchete files (289)
* enable ``index`` to accept tile directories (290)
* expose multiprocessing start method as option in ``execute`` (293)


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* fix index updates on remote TileDirectories (274)
* pass on chunksize to multiprocessing & use ``Pool.__exit__()`` to close (276)
* use GitHub actions instead of Travis CI
* update Fiona dependency to ``1.8.13.post1``


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* speed up extension loading by using ``importlib-metadata`` and ``importlib-resources`` instead of ``pkg_resources`` (267)
* use ``boto`` paging to reduce requests to S3 bucket (268)


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* use init_bounds instead of pyramid bounds on readonly mode (257)
* clean up log messages (fix 251)


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* default process bounds are now bounds of the process pyramid instead of union of inputs (242)
* fix overview pixelbuffer error at Antimeridian (241)
* increased rasterio dependency to version ``1.0.28``
* add hillshade and contour extraction to registered default processes (237)
* enable ``bigtiff`` and ``cog`` settings for single GTiff outputs (247)
* enable ``--cog`` option for ``mapchete convert`` (247)
* enable ``--bidx`` option (band subset) for ``mapchete convert`` (248)
* only initialize inputs if necessary (242)
* use ``rio-cogeo`` logic to determine whether to use a memory dataset or a temp file when writing a single GTiff (217)


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* don't raise exception when one of the registered processes cannot be imported (225)
* don't close pool between zoom levels (227)
* ``_validate`` module renamed to ``validate`` (230)
* fix inverted hillshade & misleading tile reference (229)
* fix custom nodata values in overviews (235)


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