This is a pre-production deployment of Warehouse. Changes made here affect the production instance of PyPI (pypi.python.org).
Help us improve Python packaging - Donate today!

Convert matplotlib contour plots to geojson

Project Description
A Python 3 module to convert matplotlib contour plots to geojson.

Designed to show geographical contour plots, created with matplotlib/pyplot, as vector layer on interactive slippy maps like OpenLayers and Leaflet.

Demo project that uses geojsoncontour: climatemaps.romgens.com

Currently only supports contour lines.

Installation

The recommended way to install is via pip,

$ pip install geojsoncontour

Usage

Contour plot to geojson

import numpy
import matplotlib.pyplot as plt
import geojsoncontour

# Create contour data lon_range, lat_range, Z
<your code here>

# Create a contour plot plot from grid (lat, lon) data
figure = plt.figure()
ax = figure.add_subplot(111)
contour = ax.contour(lon_range, lat_range, Z, levels=levels, cmap=plt.cm.jet)

# Convert matplotlib contour to geojson
geojsoncontour.contour_to_geojson(
    contour=contour,
    geojson_filepath='out.geojson',
    contour_levels=levels,
    ndigits=3,
    unit='m'
)

See example1.py for a basic but complete example.

Show the geojson on a map

An easy way to show the generated geojson on a map is the online geojson renderer geojson.io.

Style properties

Stroke color and width are set as geojson properties following https://github.com/mapbox/simplestyle-spec.

Create geojson tiles

Try geojson-vt or tippecanoe if performance is an issue and you need to tile your geojson contours.

Tests

Run all tests,

python -m unittest discover
Release History

Release History

This version
History Node

0.1.2

History Node

0.1.1

History Node

0.1.0

Download Files

Download Files

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

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
geojsoncontour-0.1.2-py3-none-any.whl (5.5 kB) Copy SHA256 Checksum SHA256 py3 Wheel Apr 2, 2017

Supported By

WebFaction WebFaction Technical Writing Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Rackspace Rackspace Cloud Servers DreamHost DreamHost Log Hosting