osm-analytics: data analysis tool frontend

OSM-Analytics lets you analyse interactively how specific OpenStreetMap features are mapped in a specific region.

Say, you'd like to know when most of a specific feature type (e.g. buildings) in a specific country or city were added. This tool lets you select the geographical region of interest and shows a graph of the mapping activity in the region. You can even select a specific time interval to get the number of touched features in that period, and the map will highlight the matching features. Alternatively, one can view the distribution of features by their mapper's user experience. The tool also gives a side by side comparison of the map state at different points in time and lets you view which HOT projects may have included the mapping of a region.

Features

• supported feature types: buildings (any closed osm way with a building tag), roads (any osm way with a highway tag), rivers (any osm way with a waterway tag)
• graphs of feature recency or mapper experience
• highlighting of features by custom date range or user experience interval
• calculated statistics: total number/length of features in selected region and date/experience range, number of contributors
• shows which hot projects influenced the mapping of the selected region
• compare map at different points in time
• data updated daily

Technical Overview & Limitations

See documentation/architecture.md for background information.

Installation and Usage

The frontend is implemented in React/Redux and based on tj/Frontend Boilerplate.

Install dependencies:

$ npm install

Run in development mode:

$ npm start

Generate static build:

$ npm run build

The deploy.sh script can be useful to publish updates on github-pages.

Embedding

This user interface supports a custom UI for embedding on 3rd party websites, using an HTML iframe. It allows generating a time comparison between two points in time for the same region.

The above visualization can be generated using a specific URL structure:

https://osm-analytics.org/#/compare/<region>/<start_year>...<end_year>/<feature_layer>/embed/<theme_name>

• iframe_base_url (http://osm-analytics.org)
• region the area of interest the embedded map is shown for. Can be a bounding box (bbox:110.28050,-7.02687,110.48513,-6.94219), an encoded polyline of a polygon (e.g. polygon:ifv%7BDndwkBx%60%40aYwQev%40sHkPuf%40ss%40%7BfA_%40uq%40xdCn%7D%40%5E)), or a hot project id (e.g. hot:4053) or a link to a github gist that contains a polygon.geojson file (e.g. gist:36ea172ef996a44d36a554383d5fb4fa).
• start_year (2016) represents the start year of an OpenDRI project
• end_year (now) represents the end year of an OpenDRI project. now can also be provided to compare with latest OSM data
• feature_layer (buildings) compare buildings, highways or waterways
• theme_name (default) use the default OSM Analytics visual style, or the opendri theme

The gap detection view can also be used as an embedded map in a very similar way:

https://osm-analytics.org/#/gaps/<region>/buildings-vs-ghs/embed/<theme_name>

The edit recency and user experience views can also be embedded like this:

https://osm-analytics.org/#/show/<region>/<feature_layer>/embed/<theme_name>/recency or https://osm-analytics.org/#/show/<region>/<feature_layer>/embed/<theme_name>/experience

Here, one can optionally supply a time or user experience selection, which triggers highlights respective features or regions on the map that fall into the given time period or user experience range. Just append the respective query parameter to the embed URL: /?timeSelection=<timestamp_from>,<timestamp_to> (timestamps are seconds since epoch) or /?experienceSelection=<experience_from>,<experience_to> (experience values as defined in the respective layer's experience field).

See Also

• lukasmartinelli/osm-activity – similar to OSM-Analytics, but with a simpler, more basic user interface
• OSMatrix by GIScience Heidelberg – "precursor" of OSM-Analytics
• joto/taginfo – aggregate statistics for all OSM tags
• tyrasd/taghistory – tagging history for all OSM tags
• Crowdlens by Sterling Quinn – prototype of interactive mapping history visualization
• mapbox/osm-analysis-collab – misc OSM contributor analyses based on osm-qa-tiles data