An OpenStreetMap Quality Assurance Tool
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Osmoscope is an OpenStreetMap quality assurance tool. It runs in the web browser displaying problems with OSM data and gives you access to the OSM editors to fix those issues. Additional layers can be added by anyone.


At the moment this software is only barely usable, more a proof-of-concept.

To run the web application

To run this yourself, simply serve the contents of the site directory through a webserver and access that site in your browser. No server side components are necessary besides a web server that can server static pages.

Here are some ways to start a simple web server for development using only Python2/3 or Ruby. All will serve the current directory on port 8000.

cd site
python2 -m SimpleHTTPServer 8000


cd site
python3 -m http.server --bind 8000


cd site
ruby -run -ehttpd . -p8000 --bind-address=

A test server is available at .

To add your own layers

For each layer you need to write a JSON file describing this layer. Several layers can be combined into a data source which is also described in a JSON file. Look at the example for some idea about the format. You must put these JSON files somewhere on the web. You can access the layers by typing the data source URL into the config dialog box.

The actual data of the layers has to be in GeoJSON or Mapbox Vector Tile format and must be put online somewhere also.

For a more detailed description read this.

Javascript libraries used


Copyright (C) 2018 Jochen Topf (

This program is available under the GNU GENERAL PUBLIC LICENSE Version 3. See the file LICENSE.txt for the complete text of the license.


This program was written and is maintained by Jochen Topf (