pyrosm 0.9.1

A Python tool to parse OSM data from Protobuf format into GeoDataFrame.

Pyrosm – Python’s Rapid OSM Parser

Pyrosm is a Python library for reading OpenStreetMap data from Protocolbuffer Binary Format -files (*.osm.pbf) into Geopandas GeoDataFrames. Pyrosm makes it easy to extract various datasets from OpenStreetMap pbf-dumps including e.g. road networks, buildings, Points of Interest (POI), landuse and natural elements. Also fully customized queries are supported which makes it possible to parse the data from OSM with more specific filters.

Pyrosm is easy to use and it provides a somewhat similar user interface as OSMnx. The main difference between pyrosm and OSMnx is that OSMnx reads the data over internet using OverPass API, whereas pyrosm reads the data from local OSM data dumps that can be downloaded e.g. from GeoFabrik's website. This makes it possible to read data faster thus allowing e.g. parsing street networks for the whole country fairly efficiently (however, see caveats).

The library has been developed by keeping performance in mind, hence, it is mainly written in Cython (Python with C-like performance) which makes it fast to parse OpenStreetMap data from PBF files. Pyrosm decodes the PBF data with Google's Protocol Buffers library (using its fast upb C backend). Protocol Buffers is a commonly used and efficient method to serialize and compress structured data which is also used by OpenStreetMap contributors to distribute the OSM data in PBF format (Protocolbuffer Binary Format).

Backend change. Since v0.8.0, the backend used to parse the protocol-buffer messages is Google's Protobuf (its fast C upb backend) instead of the previously used Pyrobuf. The switch was made for maintainability and installation reliability: Pyrobuf is no longer maintained and its source build fails with modern setuptools, which broke pip install pyrosm, whereas Google's Protobuf is actively maintained and ships prebuilt wheels and conda-forge packages for Python 3.10–3.14. The change does not slow down parsing — see the backend benchmark. v0.7.0 was the last release that used Pyrobuf.

Documentation is available at https://pyrosm.readthedocs.io.

Current features

• download PBF data easily from any location in the world
• find and download the right extract for a bounding box or a place name
• read street networks (separately for driving, cycling, walking and all-combined)
• read buildings from PBF
• read Points of Interest (POI) from PBF
• read landuse from PBF
• read "natural" from PBF
• read boundaries from PBF (such as administrative borders)
• read any other data from PBF by using a custom user-defined filter
• filter data based on bounding box
• control which OSM tags are parsed into columns
• crop a PBF to a smaller area and write modified OSM data back to PBF
• export networks as a directed graph to igraph, networkx and pandarm

Install

Pyrosm is distributed via PyPI and conda-forge.

The recommended way to install pyrosm is from conda-forge with mamba (or its standalone variant micromamba), a fast drop-in replacement for conda. If you don't have it yet, download and install mamba via Miniforge from the conda-forge download page — it ships mamba preconfigured with the conda-forge channel. Then install pyrosm with:

$ mamba install -c conda-forge pyrosm

or, with micromamba:

$ micromamba install -c conda-forge pyrosm

(the same command works with conda if you have it). You can also install the package with pip:

$ pip install pyrosm

Troubleshooting

Notice that pyrosm requires geopandas to work. On Linux and Mac installing geopandas with pip should work without a problem, which is handled automatically when installing pyrosm.

However, on Windows installing geopandas with pip is likely to cause issues, hence, it is recommended to install Geopandas before installing pyrosm. See instructions from Geopandas website.

When should I use Pyrosm?

Pyrosm can of course be used whenever you need to parse data from OSM into geopandas GeoDataFrames. However, pyrosm is better suited for situations where you want to fetch data for whole city or larger regions (even whole country).

If you are interested to fetch OSM data for smaller areas such as neighborhoods, or search data around a specific location/address, we recommend using OSMnx which is more flexible in terms of specifying the area of interest. That being said, it is also possible to extract neighborhood level information with pyrosm and filter data based on a bounding box (see docs).

How to use?

Using pyrosm is straightforward. See docs for instructions how to use the library.

Get in touch + contributions

If you find a bug from the tool, have question, or would like to suggest a new feature to it, you can make a new issue here.

We warmly welcome contributions to pyrosm to make it better. If you are interested in contributing to the library, please check the contribution guidelines.

Development

You can install a local development version of the tool by 1) creating an environment with the necessary packages using mamba/micromamba and 2) building pyrosm from source:

1. create an environment for one of the supported Python versions (3.10–3.14) by:

   • e.g. Python 3.14 (you might want to modify the env-name which is test by default): $ mamba env create -f ci/314-conda.yaml (or $ micromamba create -f ci/314-conda.yaml)
   • environment files for other versions are available under ci/ (e.g. ci/312-conda.yaml)

2. build pyrosm development version from master (activate the environment first):

   • pip install -e . --no-build-isolation
   • (--no-build-isolation builds the Cython extensions against the build dependencies provided by the environment, i.e. Cython and cykhash, instead of refetching and recompiling them in an isolated build environment)

You can run tests with pytest by executing:

$ pytest . -v

License and copyright

Pyrosm is licensed under MIT (see license).

The OSM data is downloaded from two sources:

Data © Geofabrik GmbH, BBBike and OpenStreetMap Contributors

All data from the OpenStreetMap is licensed under the OpenStreetMap License.

Caveats

Filtering large files by bounding box

Although pyrosm provides possibility to filter even larger data files based on bounding box, this process can slow down the reading process significantly (1.5-3x longer) due to necessary lookups when parsing the data. This might not be an issue with smaller files (up to ~100MB) but with larger data dumps this can take longer than necessary.

Hence, a recommended approach with large data files is to first filter the protobuf file based on bounding box into a smaller subset by using a dedicated open source Java tool called Osmosis which is available for all operating systems. Detailed installation instructions are here, and instructions how to filter data based on bounding box are here.