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title: OpenStreetMap contributions
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---
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As the OpenStreetMap community is pretty active here, the local map is quite
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good and it is very useful to me when doing urban geocaching or just to walk
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around, especially with OsmAnd, a very good map app.
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I had contributed to OSM a while ago while I was in a different region, mainly
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by posting notes and telling other contributors to fix the map for me. Now I
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want to do something a bit better and actually contribute myself.
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I added a public bookcase and tried to look a little deeper into how traffic
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signals are mapped because there was one right new to the bookcase. That got
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me to [start a discussion][traffic-sound] on traffic signals having audio
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signals for blind people being activated using remotes in France.
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I also started looking into two particular things: mapping public drinking
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fountains, which are commonly found in the city center here, and addings tags
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on public places with Wi-Fi access, as there are free Wi-Fi hotspots provided
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by the city among other things.
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## Tagging drinking fountains
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* General tag: `amenity=drinking_water`
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Shown as "Potable water" in OsmAnd
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* Specific tag: `man_made=water_tap`
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Shown as "Water fountain" in OsmAnd
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* Potable water: `drinking_water=yes/no`
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* Drinking is forbidden: `drinking_water:legal=no`
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* Can refill bottles: `bottle=yes/no`
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* Hot/cold water: `cold_water=yes/no`, `hot_water=yes/no`
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* Has a fee: `fee=yes/no`
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* Wheelchair accessible: `wheelchair=yes/no`
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* Operator: `operator=…`
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## Tagging internet access
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* `internet_access`
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* `yes`: Available, not more specific
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* `no`: Not available
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* `wlan`: Wireless hotpost (Wi-Fi)
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* `terminal`: Computers available with Internet access
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* `wired`: Ethernet plugs available
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* `service`: People are available to troubleshoot your connection
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* Specific values can be combined: `wlan;terminal` for example if there are
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both computers and WLAN.
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* `internet_access:fee`
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* `yes`: A fee is required to get access
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* `no`: Free for all
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* `customers`: Only the customers get free access
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* `internet_access:operator`: Operator of the service, if not the operator
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of the building itself (aka the general `operator` key)
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* `internet_access:ssid`: ESSID of the Wi-Fi network.
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Note that hotspots that are strictly restricted to a set of persons, even after
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paying a fee (e.g. Eduroam, company networks, etc.) should not be mapped.
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## Wi-Fi scanning
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Ideally, we need a way to log both the current GPS position and the found
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networks with their signal strength, which would allow us to later do some
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triangulation and guess at where the network is. We also need to see the
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currently detected networks while on the go, as we might be able to guess
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where they are without having to do a mess of triangulation.
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We tried to use an Android app, [WiFi Tracker][wifitracker], but it does
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not work on my phone and is quite power-hungry. Additionally, on Android
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9, Wi-Fi scanning is limited and lifting the restriction is only possible
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in the developer options in Android 10+.
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We might have an ESP32-based scanner soon.
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[wifitracker]: https://play.google.com/store/apps/details?id=org.prowl.wifiscanner
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[traffic-sound]: https://wiki.openstreetmap.org/wiki/Talk:Key:traffic_signals:sound#Remote-operated_signal_sound
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