Project of the week/2011/Jan 26

From OpenStreetMap Wiki
Jump to: navigation, search
Available languages — Project of the week/2011/Jan 26
Afrikaans Alemannisch aragonés asturianu azərbaycanca Bahasa Indonesia Bahasa Melayu Bân-lâm-gú Basa Jawa Baso Minangkabau bosanski brezhoneg català čeština dansk Deutsch eesti English español Esperanto estremeñu euskara français Frysk Gaeilge Gàidhlig galego Hausa hrvatski Igbo interlingua Interlingue isiXhosa isiZulu íslenska italiano Kiswahili Kreyòl ayisyen kréyòl gwadloupéyen kurdî latviešu Lëtzebuergesch lietuvių magyar Malagasy Malti Nederlands Nedersaksies norsk norsk nynorsk occitan Oromoo oʻzbekcha/ўзбекча Plattdüütsch polski português română shqip slovenčina slovenščina Soomaaliga suomi svenska Tiếng Việt Türkçe Vahcuengh vèneto Wolof Yorùbá Zazaki српски / srpski беларуская български қазақша македонски монгол русский тоҷикӣ українська Ελληνικά Հայերեն ქართული नेपाली मराठी हिन्दी অসমীয়া বাংলা ਪੰਜਾਬੀ ગુજરાતી ଓଡ଼ିଆ தமிழ் తెలుగు ಕನ್ನಡ മലയാളം සිංහල ไทย မြန်မာဘာသာ ລາວ ភាសាខ្មែរ ⵜⴰⵎⴰⵣⵉⵖⵜ አማርኛ 한국어 日本語 中文(简体)‎ 吴语 粵語 中文(繁體)‎ ייִדיש עברית اردو العربية پښتو سنڌي فارسی ދިވެހިބަސް


A building in Marburg Germany
A building, in this case a library, as rendered in the mapnik layer

Adding buildings to OpenStreetMap has been difficult in the past. Collecting a GPS trace of a building yields poor results because the building interferes with GPS reception. But buildings can be interesting to have on a map. Large collections of buildings in cities can look very impressive. Lone buildings in remote areas can be important landmarks for navigation. Or a shelter from bad weather.

There are more than 28 million buildings in the OpenStreetMap database. Recent donations to OpenStreetMap contributors of aerial imagery that permits deriving OSM objects without restriction have made mapping buildings practical in more parts of the world.

The Project of the Month is to add local buildings to the map.

Tagging suggestions

Buildings are mapped as areas in OpenStreetMap. As always, OSM contributors are able to provide the best, most-accurate, most-up-to-date data when they contribute data from places they visit every day or every week.

Required tags

The only required tag for a building is

It is acceptable to tag buildings with a more descriptive building tag, such as building=house. Fewer than three percent of OSM buildings use these more-descriptive tags, and it remains unclear what granularity of different values should go into building values as opposed to other tags (existing tags) on the same area. Despite this, a recent Mapnik rendering change (Feb 2011) means we're now showing building=house and building=residential in a lighter shade than other building tags example, so we can expect use of those values to increase. The rendering change is under discussion however.

Recommended tags

Address information for buildings should be added where they are known.

Some buildings have names

If the building has only a single tenant or business that name is often applied to the building.


These graphs show the number of buildings* in the OpenStreetMap database and are updated approximately once per hour.


  • The "recent" line shows the number of objects added recently. It is a rough indication of PotM activity over the last little while, nominally an hour. The "PotM" line indicates the start and end of the project period.

Found typos?