197 lines
10 KiB
Markdown
197 lines
10 KiB
Markdown
# MapComplete
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> Let a thousand flowers bloom
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[](https://liberapay.com/pietervdvn/) [](https://liberapay.com/pietervdvn/)
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[](https://matrix.to/#/#MapComplete:matrix.org)
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**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.
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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.
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By showing only objects on a single topic, contributors are not distracted by objects that are not relevant to them.
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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).
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**The design goals** of MapComplete are to be:
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- Easy to use, both on web and on mobile
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- Easy to deploy (by not having a backend)
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- Easy to set up a custom theme
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- Easy to fall down the rabbit hole of OSM
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**The basic functionality is** to download some map features from Overpass and then ask certain questions. An answer is
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sent back to directly to OpenStreetMap.
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Furthermore, it shows images present in the `image` tag or, if a `wikidata` or `wikimedia_commons`-tag is present, it
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follows those to get these images too.
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**An explicit non-goal** of MapComplete is to modify geometries of ways, especially generic geometry editing. (Splitting
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roads is possible; in some restricted themes, geometry conflation is also possible). If adding geometry would be supported, we'd also have to show all geometries (to avoid accidental intersections).
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This would invite showing and editing other geometries as well, resulting in a general-purpose editor. However, we already [have an excellent, web-based general purpose editor](https://wiki.openstreetmap.org/wiki/ID).
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**More about
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MapComplete:** [Watch Pieter's talk on the 2021 State Of The Map Conference](https://media.ccc.de/v/sotm2021-9448-introduction-and-review-of-mapcomplete) ([YouTube](https://www.youtube.com/watch?v=zTtMn6fNbYY))
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about the history, vision and future of MapComplete.
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## How is it different from StreetComplete?
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This is the repository of _Map_ Complete. _Street_ Complete is an Android-only application where the contributor is shown some questions to solve, after which the pin will dissappear from the map.
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StreetComplete can thus be seen as a Todo-map for contributors who go on a stroll, whereas MapComplete is a website showing relevant information and which allows adding or updating information.
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The codebases are separate, even though many ideas and some artwork are copied from the StreetComplete app.
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# Documentation
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**All documentation can be found in [the documentation directory](Docs/)**
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## Dev
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To develop or deploy a version of MapComplete, have a look [to the guide](Docs/Development_deployment.md).
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## Creating your own theme
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It is possible to quickly make and distribute your own theme, [please read the documentation on how to do this](Docs/Making_Your_Own_Theme.md).
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The main developer is currently _not_ taking requests for new themes (unless they are commissioned). There are simply too many good thematic maps to make.
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We do however encourage you to try to create your own theme yourself - we'll gladly accept it as an official theme if it meets the criteria.
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## Examples
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- [An overview of all official themes](https://mapcomplete.org).
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- [Buurtnatuur.be](http://buurtnatuur.be), developed for the Belgian [Green party](https://www.groen.be/). They also
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funded the initial development!
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- [Cyclofix](https://mapcomplete.org/cyclofix.html), further development
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on [Open Summer of Code](https://summerofcode.be/) funded
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by [Brussels Mobility](https://mobilite-mobiliteit.brussels/en). Landing page at https://cyclofix.osm.be/
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- [Bookcases](https://mapcomplete.org/bookcases.html) cause I like to collect
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them.
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- [Map of Maps](https://mapcomplete.org/maps.html),
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after a tweet
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- [A build of the develop branch can be found here](https://pietervdvn.github.io/mc/develop)
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There are plenty more. [Discover them in the app](https://mapcomplete.org/index.html).
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### Statistics
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To see statistics,
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consult [OsmCha](https://osmcha.org/?filters=%7B%22comment%22%3A%5B%7B%22label%22%3A%22%23mapcomplete%22%2C%22value%22%3A%22%23mapcomplete%22%7D%5D%2C%22date__gte%22%3A%5B%7B%22label%22%3A%222020-07-05%22%2C%22value%22%3A%222020-07-05%22%7D%5D%7D)
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or the [analytics page](https://pietervdvn.goatcounter.com/
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The first ever (testing) changeset https://www.openstreetmap.org/changeset/85856178 and first _proper_ changeset: https://www.openstreetmap.org/changeset/85903433
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## User journey
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MapComplete is set up to lure people into OpenStreetMap and to teach them while they are on the go, step by step.
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A typical user journey would be:
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1. Oh, this is a cool map of _my specific interest_! There is a lot of data already...
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* The user might discover the explanation about OSM in the second tab
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* The user might share the map and/or embed it in the third tab
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* The user might discover the other themes in the last tab
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2. The user clicks that big tempting button 'login' in order to answer questions - there's enough of these login
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buttons...the user creates an account.
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3. The user answers a question! Hooray! The user is now transformed into a __contributor__.
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* When at least one question is answered (AKA: having one changeset on OSM), adding a new point is unlocked
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4. The user adds a new POI somewhere
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* Note that _all messages_ must be read before being able to add a point.
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* In other words, sending a message to a misbehaving MapComplete user acts as having a **zero-day-block**. This is
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added deliberately to make sure new users _have_ to read feedback from the community.
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5. At 50 changesets, the [personal layout](https://mapcomplete.org/personal.html) is advertised. The
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personal theme is a theme where contributors can pick layers from all the official themes. Note that the personal
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theme is always available.
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6. At 200 changesets, the tags become visible when answering questions and when adding a new point from a preset. This
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is to give more control to power users and to teach new users the tagging scheme.
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7. At 250 changesets, the tags get linked to the wiki.
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8. At 500 changesets, I expect contributors to be power users and to be comfortable with tagging schemes and such. The
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custom theme generator is unlocked.
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## License
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GPLv3.0 + recommended pingback.
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I love it to see where the project ends up. You are free to reuse the software (under GPL) but, when you have made your
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own change and are using it, I would like to know about it. Drop me a line, give a pingback in the issues,...
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## Translating MapComplete
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The core strings and builtin themes of MapComplete are translated
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on [Hosted Weblate](https://hosted.weblate.org/projects/mapcomplete/core/). You can easily make an account and start
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translating in their web-environment - no installation required.
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You can even jump to the right translation string directly from MapComplete:
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[](https://hosted.weblate.org/engage/mapcomplete/)
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## Architecture
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### High-level overview
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The website is purely static. This means that there is no database here, nor one is needed as all the data is kept in
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OpenStreetMap, Wikimedia (for images), Imgur. Settings are saved in the preferences-space of the OSM-website, amended by
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some local-storage if the user is not logged-in.
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When viewing, the data is loaded from Overpass. The data is then converted (in the browser) to GeoJSON, which is
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rendered by Leaflet.
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When a map feature is clicked, a popup shows the information, images and questions that are relevant for that object.
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The answers given by the user are sent (after a few seconds) to OpenStreetMap directly - if the user is logged in. If
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not logged in, the user is prompted to do so.
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The UI-event-source is a class where the entire system is built upon, it acts as an observable object: another object
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can register for changes to update when needed.
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### Searching images
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Images are fetched from:
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- The OSM `image`, `image:0`, `image:1`, ... tags
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- The OSM `wikimedia_commons` tags
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- If wikidata is present, the wikidata `P18` (image) claim and, if a commons link is present, the commons images
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### Uploading images
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Images are uploaded to Imgur, as their API was way easier to handle. The URL is written into the changes.
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The idea is that once in a while, the images are transferred to wikipedia or that we hook up wikimedia directly (but I
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need some help in getting their API working).
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### Uploading changes
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In order to avoid lots of small changesets, a changeset is opened and kept open. The changeset number is saved into the
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users preferences on OSM.
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Whenever a change is made - even adding a single tag - the change is uploaded into this changeset. If that fails, the
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changeset is probably closed and we open a new changeset.
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Note that changesets are closed automatically after one hour of inactivity, so we don't have to worry about closing
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them.
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# Privacy
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Privacy is important, we try to leak as little information as possible. All major personal information is handled by
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OSM. Geolocation is available on mobile only through the device's GPS location (so no geolocation is sent to Google).
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TODO: erase cookies of third party websites and API's
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# Attribution and Copyright
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The code is available under GPL; all map data comes from OpenStreetMap (both foreground and background maps).
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Background layer selection: curated by https://github.com/osmlab/editor-layer-index
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Icons are attributed in various 'license_info.json'-files and can be found in the app.
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