Python Reprojector
Project description
Python Reprojector
This is a simple python library for coordinate transformations between different projections. It uses the pyproj library as a wrapper for proj.4. The goal is to make transformations as simple as possible.
Usage
Get transformation function
from pyreproj import Reprojector rp = Reprojector() transform = rp.get_transformation_function(from_srs=4326, to_srs='epsg:2056') transform(47.46614, 7.80071) # returns: (2627299.6594659993, 1257325.3550428299)
The arguments from_srs and to_srs can be one of the following:
- Integer: value of the EPSG code, e.g. 2056
- String: EPSG code with leading “epsg:”, e.g. ‘epsg:2056’
- String: proj4 definition string
- Object: instance of pyproj.Proj
The returned function is a functools.partial that can also be used as first argument for shapely.ops.transform.
Transform coordinates directly
from shapely.geometry import Point from pyreproj import Reprojector rp = Reprojector() p1 = Point(47.46614, 7.80071) p2 = rp.transform(p1, from_srs=4326, to_srs=2056) p2.wkt # returns: 'POINT (2627299.659465999 1257325.35504283)' rp.transform([47.46614, 7.80071], from_srs=4326, to_srs=2056) # returns: [2627299.6594659993, 1257325.3550428299] rp.transform((47.46614, 7.80071), from_srs=4326, to_srs=2056) # returns: (2627299.6594659993, 1257325.3550428299)
The arguments from_srs and to_srs can be one of the following:
- Integer: value of the EPSG code, e.g. 2056
- String: EPSG code with leading “epsg:”, e.g. ‘epsg:2056’
- String: proj4 definition string
- Object: instance of pyproj.Proj
Get projection from service
from pyreproj import Reprojector rp = Reprojector() proj = rp.get_projection_from_service(epsg=2056) type(proj) # returns: <class 'pyproj.Proj'>
Changelog
2.0.0
https://gitlab.com/geo-bl-ch/python-reprojector/milestones/2
- Update used version of pyproj (>=2.2.0)
Warning
The order of lon/lat values has changed to lat/lon!
1.0.1
https://gitlab.com/geo-bl-ch/python-reprojector/milestones/1
- Set up deployment
- Lock version of pyproj<2.0.0
1.0.0
- Initial version
- Features:
- define projections by projection object, proj4 definition or EPSG code
- get projection by service (e.g. http://spatialreference.org/)
- get a transformation function from source to target projection
- transform coordinates as list or tuple or a shapely geometry directly
Project details
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