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Refactor figures; get use of Python 3.9 features.

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This commit is contained in:
Sergey Vartanov 2021-08-18 08:38:33 +03:00
parent 053324451a
commit 3bcf026862
36 changed files with 698 additions and 750 deletions
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9
roentgen/flinger.py
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@ -27,10 +27,13 @@ def pseudo_mercator(coordinates: np.array) -> np.array:
return np.array((coordinates[1], y))
def osm_zoom_level_to_pixels_per_meter(zoom_level: float):
def osm_zoom_level_to_pixels_per_meter(zoom_level: float) -> float:
"""
Convert OSM zoom level (see https://wiki.openstreetmap.org/wiki/Zoom_levels)
to pixels per meter on Equator.
Convert OSM zoom level to pixels per meter on Equator. See
https://wiki.openstreetmap.org/wiki/Zoom_levels
:param zoom_level: integer number usually not bigger than 20, but this
function allows any non-negative float value
"""
return 2 ** zoom_level / 156415