EPSGlide 0.2.2

Efficient great circle computation and projection library with access to EPSG dataset public API

Python epsglide package

This package aims to perform simple requests to EPSG GeoRepository API and use associated geodesic computation or map projections.

EPSG dataset requests and projection

epslide provides several dataset classes to manage parameters and populate the toplevel class ProjectedCoordRefSystem. This toplevel class allow projection and contains other dataset classes to perform geodetic computations.

>>> import math, epsglide
>>> crs = epsglide.ProjectedCoordRefSystem(26730)
>>> crs
<ProjectedCoordRefSystem 26730: NAD27 / Alabama West>
>>> point = epsglide.Geodetic(math.degrees(crs.lambda0), math.degrees(crs.phi0))
>>> crs(point)
<US survey foot:3.281[X=152400.305 Y=0.000] alt=0.000>
>>> crs(crs(point))
<lon=-087d18m0.00000s lat=+030d00m0.00000s alt=0.0>

EPSG dataset conversion

>>> osgb36 = epsglide.ProjectedCoordRefSystem(27700)
>>> lla = osgb36(epsglide.Geographic(400000, -100000, 0))                       
>>> osgb36.GeodeticCoordRefSystem.to_wgs84(lla)
<lon=-002d00m0.00000s lat=+049d00m2.50812s alt=-529.126>
>>> lla
<lon=-002d00m0.00000s lat=+049d00m0.00000s alt=0.0>

Great circle computation

>>> wgs84 = epsglide.dataset.Ellipsoid(7030)
>>> dublin = epsglide.Geodetic(-6.272877, 53.344606, 105.)
>>> london = epsglide.Geodetic(-0.127005, 51.518602, 0.)
>>> dist = wgs84.distance(dublin, london) 
>>> dist
<464.572km initial bearing=113.5° final bearing=118.3°>
>>> wgs84.destination(dublin, dist) 
<lon=-000d07m37.21798s lat=+051d31m6.96719s end bearing=118.3°>
>>> london
<lon=-000d07m37.21800s lat=+051d31m6.96720s alt=0.0>

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