Skip to main content

Convert matplotlib contour plots to geojson

Project description

Build Status PyPI version Coverage Status
A Python 3 module to convert matplotlib contour plots to geojson. Supports both contour and contourf plots.

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:


Install with pip,

$ pip install geojsoncontour


Use contour_to_geojson to create a geojson with contour lines from a matplotlib.contour plot (not filled). Use contourf_to_geojson to create a geojson with filled contours from a matplotlib.contourf plot.

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,

# Convert matplotlib contour to geojson
geojson = geojsoncontour.contour_to_geojson(

For filled contour plots (matplotlib.contourf) use contourf_to_geojson. See and for simple but complete examples.

Show the geojson on a map

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

Style properties

Stroke color and width are set as geojson properties following

Create geojson tiles

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


Run all tests,

python -m unittest discover

Project details

Download files

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

Source Distributions

No source distribution files available for this release. See tutorial on generating distribution archives.

Built Distribution

geojsoncontour-0.2.0-py3-none-any.whl (5.8 kB view hashes)

Uploaded py3

Supported by

AWS AWS Cloud computing Datadog Datadog Monitoring Facebook / Instagram Facebook / Instagram PSF Sponsor Fastly Fastly CDN Google Google Object Storage and Download Analytics Huawei Huawei PSF Sponsor Microsoft Microsoft PSF Sponsor NVIDIA NVIDIA PSF Sponsor Pingdom Pingdom Monitoring Salesforce Salesforce PSF Sponsor Sentry Sentry Error logging StatusPage StatusPage Status page