mirror of
https://github.com/wassname/PyCRS.git
synced 2026-06-27 16:10:29 +08:00
Karim Bahgat
71 lines
1.7 KiB
Python
71 lines
1.7 KiB
Python
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def find(datumname, crstype, strict=False):
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if not strict:
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datumname = datumname.lower()
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for itemname,item in globals().items():
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if itemname.startswith("_"):
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continue
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try:
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if hasattr(item, crstype):
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itemname = getattr(item, crstype)
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if not strict:
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itemname = itemname.lower()
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if datumname == itemname:
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return item
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except:
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pass
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else:
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return None
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class WGS84:
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proj4 = "WGS84"
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ogc_wkt = "WGS_1984"
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esri_wkt = "D_WGS_1984"
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ellipsdef = "" # ellipsoids.WGS84()
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to_wgs84 = None
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class WGS72_BE:
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proj4 = "" # no datum name, just ellips + towgs84 params...
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ogc_wkt = "WGS_1972_Transit_Broadcast_Ephemeris"
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esri_wkt = "D_WGS_1972_BE"
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ellipsdef = "" # ellipsoids.WGS72()
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to_wgs84 = 0,0,1.9,0,0,0.814,-0.38
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class NAD83:
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proj4 = "NAD83" # no datum name, just ellips + towgs84 params...
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ogc_wkt = "North_American_Datum_1983"
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esri_wkt = "D_North_American_1983"
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ellipsdef = "" # ellipsoids.WGS72()
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to_wgs84 = None
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class NAD27:
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proj4 = "NAD27"
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ogc_wkt = "D_North_American_1927"
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esri_wkt = "D_North_American_1927"
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ellipsdef = "" # ellipsoids...
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to_wgs84 = None
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class SphereArcInfo:
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proj4 = "" # no name
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ogc_wkt = "D_Sphere_ARC_INFO" # confirmed but odd that uses D_
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esri_wkt = "D_Sphere_ARC_INFO"
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semimaj_ax = 6370997.0
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inv_flat = 0.0
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class Unknown:
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proj4 = "unknown" # no datum name, just ellips + towgs84 params...
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ogc_wkt = "Unknown"
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esri_wkt = "Unknown"
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ellipsdef = "" # ellipsoids.WGS72()
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to_wgs84 = None,None
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