shapely

Pre-release

This release is a pre-release and may not be stable for production use.

Shapely is a Python package for programming with geospatial geometries. It is based on GEOS (http://geos.refractions.net). Shapely 1.0 is ignorant about coordinate and reference systems. Projection responsibility is left to specific applications. For more information, see:

Shapely wiki
Shapely manual

Shapely requires Python 2.4+. (I’ve also begun to port it to Python 3.0: http://zcologia.com/news/564/shapely-for-python-3-0/.)

Dependencies

libgeos_c (2.2.3, also reported to work with 3.0 after small modifications.)
Python ctypes (standard in Python 2.5+)

Installation

Shapely can be installed from the Python package index:

$ sudo easy_install Shapely

with the setup script:

$ sudo python setup.py install

or by using the development buildout, which also provides libgeos_c:

$ svn co http://svn.gispython.org/svn/gispy/buildout/shapely.buildout/trunk shapely.buildout
$ cd shapely.buildout
$ python bootstrap.py
$ ./bin/buildout

Usage

Buffer a point:

>>> from shapely.geometry import Point
>>> point = Point(-106.0, 40.0) # longitude, latitude
>>> point.buffer(10.0)
<shapely.geometry.polygon.Polygon object at ...>

See Operations.txt and Predicates.txt under tests/ for more examples of the spatial operations and predicates provided by Shapely. Also see Point.txt, LineString.txt, etc for examples of the geometry APIs.

Numpy integration

All Shapely geometry instances provide the Numpy array interface:

>>> from numpy import asarray
>>> a = asarray(point)
>>> a.size
3
>>> a.shape
(2,)

Numpy arrays can also be adapted to Shapely points and linestrings:

>>> from shapely.geometry import asLineString
>>> a = array([[1.0, 2.0], [3.0, 4.0]])
>>> line = asLineString(a)
>>> line.wkt
'LINESTRING (1.0000000000000000 2.0000000000000000, 3.0000000000000000 4.0000000000000000)'

Python Geo Interface

Any object that provides the Python geo interface can be adapted to a Shapely geometry with the asShape factory:

>>> d = {"type": "Point", "coordinates": (0.0, 0.0)}
>>> from shapely.geometry import asShape
>>> shape = asShape(d)
>>> shape.geom_type
'Point'
>>> tuple(shape.coords)
((0.0, 0.0),)

>>> class GeoThing(object):
...     def __init__(self, d):
...         self.__geo_interface__ = d
>>> thing = GeoThing({"type": "Point", "coordinates": (0.0, 0.0)})
>>> shape = asShape(thing)
>>> shape.geom_type
'Point'
>>> tuple(shape.coords)
((0.0, 0.0),)

See http://trac.gispython.org/projects/PCL/wiki/PythonGeoInterface for more details on the interface.

Testing

Several of the modules have docstring doctests:

$ cd shapely
$ python point.py

There are also two test runners under tests/. test_doctests.py requires zope.testing. runalldoctests.py does not.

Support

For current information about this project, see the wiki.

If you have questions, please consider joining our community list:

http://trac.gispython.org/projects/PCL/wiki/CommunityList

Release files for shapely 1.0a7

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for shapely 1.0a7
File	Size	Uploaded
Shapely-1.0a7.tar.gz	19.4 kB	Oct 23, 2007	Details

Built distribution (wheel)

Table of built distributions (wheels) for shapely 1.0a7
File	Interpreter	ABI	Platform	Reset
Shapely-1.0a7-py2.4.egg 53.5 kB Oct 23, 2007	Legacy Egg format	-	-	Details

Total release size: 73.0 kB

Release files / Shapely-1.0a7.tar.gz

Download URL	Shapely-1.0a7.tar.gz
Size	19.4 kB
Tags	Source
SHA-256 checksum How to use checksums	`99fd241ea70768cf0755f79b6f3ac8201163f9f3c7df6614cc96531ec22ed6a6`
BLAKE2b-256 checksum How to use checksums	`9450235fb07d3723e7efe18d3d01c8fdc0514c2f4a3f6bcfbaa4d39da717e138`
Upload date	Oct 23, 2007
Uploaded using Trusted Publishing? What is trusted publishing?	No

Release files / Shapely-1.0a7-py2.4.egg

Download URL	Shapely-1.0a7-py2.4.egg
Size	53.5 kB
Tags	Egg
SHA-256 checksum How to use checksums	`25e23fa21c42a1c4cd71133c8819c83728a0c6f76e5c5746cd607068faaf9507`
BLAKE2b-256 checksum How to use checksums	`aa7b604665d0552f5ffc44a99d3bb71208ebca52e799b36b03d6cf4026aba9a4`
Upload date	Oct 23, 2007
Uploaded using Trusted Publishing? What is trusted publishing?	No