Skip to main content

A tidy Python package for geospatial computation

Project description

Karta is a Leatherman for geographic analyses. Karta provides an interface for solving problems in Python (2 or 3) that works nicely with existing packages. To this end, it provides simple and clean vector and raster data types, a selection of analysis functions, the ability to read and write a small number of useful formats, and interoperability with numpy.

Goals of Karta include providing a simple, lightweight, and fast set of tools useful for “everyday” spatial analysis, as well as a flexible set of abstractions upon which to build more advanced routines.

CONTENTS AT A GLANCE

  • vector
    • guppy: Vector geometry classes (e.g. Point, Multipoint, Line, Polygon)
    • gpx: GPX class for parsing and constructing GPX eXchange files
    • geojson: Classes and functions for reading and writing GeoJSON
    • vtk: XML-based VTK interface
    • shp_funcs: Shapefile-to-guppy conversions based on pyshp
    • stats: Geostatistical functions
    • xyfile: ASCII table functions
  • raster
    • grid: Basic Grid types, including StructuredGrid and RegularGrid
    • aaigrid: Grid subclass specifically for reading, writing, and manipulating ESRI ASCII grids
    • flow: Stream flow functions
    • raster: General purpose raster functions
    • streamline: Streamline calculation
  • tests : unit tests

FORMATS

Karta provides a basic working interface to several of common file formats. Currently partially-supported are:

  • vector
    • ASCII tables (XYZ) (r,w)
    • GeoJSON (r,w)
    • GPS eXchange (GPX) (r,w)
    • VTK (w)
    • ESRI Shapefiles via pyshp (r,w)
  • raster
    • ESRI ASCII Grid (r,w)
    • USGS DEM (WIP)

INSTALLATION

The easiest way to install is to use pip.

cd karta/
pip install .

DEPENDENCIES

Required

  • Python 2.6+ or Python 3.2+
  • numpy

Optional

  • pyproj (required for geodetic calculations)
  • scipy
  • Cython

Cython is an optional dependency used to speed up select functions. In general, enhanced-performance functions will then be called automatically when available, otherwise Karta will fall back to numpy and pure-Python versions.

TESTING

To run all unit tests, execute

python karta/tests/test_runner.py

LICENSE

This software is provided under the MIT license.

The vector module contains a snapshot of the pyshp shapefile module, available at (http://code.google.com/p/pyshp/). This module is also available under the MIT license.

MIT License:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

Project details


Release history Release notifications

History Node

0.9.0

History Node

0.8.3

History Node

0.8.2

History Node

0.8.1

History Node

0.8.0

History Node

0.8b1

History Node

0.7.4

History Node

0.7.3

History Node

0.7.2

History Node

0.7.1

History Node

0.7

History Node

0.7b1

History Node

0.6.1

History Node

0.6

History Node

0.5.4

History Node

0.5.3

History Node

0.5.2

History Node

0.5.1

History Node

0.5.1.dev0

History Node

0.5.0

History Node

0.5.0b1

History Node

0.5.0a0

History Node

0.4.6

History Node

0.4.5

History Node

0.4.4

History Node

0.4.3

History Node

0.4.2.4

History Node

0.4.2.3

History Node

0.4.2.2

History Node

0.4.2.1

History Node

0.4.2

History Node

0.4.1

History Node

0.4.0.2

History Node

0.4.0.1

History Node

0.4.0

History Node

0.4.0b5

History Node

0.4.0b4

History Node

0.4.0b3

History Node

0.4.0b2

History Node

0.4.0b

History Node

0.3.0

History Node

0.2.4

History Node

0.2.3

History Node

0.2.2

History Node

0.2.1

History Node

0.2.0

History Node

0.1.0.2

History Node

0.1.0.1

This version
History Node

0.1

Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
karta-0.1.tar.gz (238.0 kB) Copy SHA256 hash SHA256 Source None May 18, 2014

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging CloudAMQP CloudAMQP RabbitMQ AWS AWS Cloud computing Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page