MapComplete

MapComplete is an OpenStreetMap viewer and editor. The main goal is to make it trivial to see and update information on OpenStreetMap, also for non-technical users. This is achieved by showing only features related to a single topic on the map. MapComplete contains many thematic maps, each built for a certain community of users, showing data and questions that are highly relevant for this topic. By showing only objects on a single topic, contributors are not distracted by objects that are not relevant to them. Furthermore, this allows to show (and ask for) attributes that are highly specialized (e.g. a widget that determines tree species based on pictures) but also by reusing common attributes and elements (such as showing and adding opening hours or pictures).

The design goals of MapComplete are to be:

• Easy to use, both on web and on mobile
• Easy to deploy (by not having a backend)
• Easy to set up a custom theme
• Easy to fall down the rabbit hole of OSM

The basic functionality is to download some map features from Overpass and then ask certain questions. An answer is sent back to directly to OpenStreetMap.

Furthermore, it shows images present in the image tag or, if a wikidata or wikimedia_commons-tag is present, it follows those to get these images too.

An explicit non-goal of MapComplete is to modify geometries of ways, especially generic geometry-editing. (Splitting roads is possible and in some restricted themes is geometry-conflation possible too). If adding geometry would be supported, we'd also have to show all geometries (to avoid accidental intersections). This would invite to show and map these other geometries as well, resulting in a general-purpose editor. However, we already have an excellent, web-based general purpose editor.