Fortyninemaps Karta Versions Save

Relatively small changeset, but some compatibility-breaking changes in multiband raster indexing operations

changes since 0.8.1:

• bugfix for windows (e80401d)
• nodata_value property exposed on RegularGrid
• experimental RegularGrid._align_origin method
• resample_* functions in raster.crfuncs now take an na parameter

• refactor GeoJSON support into external module, picogeojson
• removed __setitem__ and __delitem__ methods from MultiVertex, as part of a move toward treating singlepart geometries as immutable
• removed xyfile module
• removed several custom Exception types
• remove flat_distances_to(), and allow distances_to to take a crs kwarg instead
• remove Point.coordsxy()
• remove RegularGrid.coordmesh() and RegularGrid.center_coords()
• remove warpedgrid
• remove aliases gtiffread and aairead (these have been deprecated for ? versions now)
• renames:
  • read_gtiff -> RegularGrid.from_geotiff
  • read_aai -> RegularGrid.from_aai
  • get_coordinate_lists -> aslists
  • get_vertices -> asarray
  • rotate2d -> rotate
• remove deprecated SphericalCRS and EllipsoidalCRS
• indexing a CompressedBand instance with a scalar now returns a row vector
• new function merge_multiparts to combine multipart geometries
• Multipart constructors are now more strict about what they will accept as data. Values for the data kwarg are now required to be Table or dict-like, the the length of individual dict values is checked

Bugfix release. Changes include:

• indexing fixed for CompressedBand
• bbox fix for empty Multipart geometries
• fixes for geometry mutations

• aliases for compatibility with code written using karta 0.8
• geographical CRS area fix (5a0e821d4989b98de023163d132093dc49c80de4)
• resize nodata fix (d1e7f9840ec6d54d33b76242f5c86630b17e6b08)
• coorectly handle NaN nodata in new read_from_geotiffs function (a831d0fc26cd2cc483adae2109f95764a2bd6c66)

• performance: convex hull calculation cythonized and extended for spherical coordinates
• performance: planar length calculations are much faster (~700 x) and geodetic length calculations are somewhat faster (~1.8 x)
• fix: CompressedBand now always returns array when indexed with a slice
• fix: output dimension of grid sampling methods is now always one larger than the input
• raster.merge now works with multiband grids
• efficient algorithm for intersection detection in planar and spherical coordinates
• new read_gtiffs function for reading multiple files as bands
• implement experimental RegularGrid.coordinates() method returning a CoordGenerator object
• implement get_coordinate_lists for Multiline and Multipolygon
• other performance optimizations and fixes