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OpenStreetMap's free tagging system allows the map to include an unlimited number of attributes describing each feature. The community agrees on certain key and value combinations for the most commonly used tags, which act as informal standards.
Jul 22, 2024 · Keys and values. Tags are applied to elements or changesets (i.e., tagging them) resulting in a collection of tags of any size. However, each collection may only contain a key once. Where a tag is not present, there are often considered to be default values or values inherited from parent elements.
Jul 2, 2024 · The key highway =* is the main key used for identifying any kind of road, street or path. The value of the key helps indicate the importance of the highway within the road network as a whole. See the table below for an ordered list from most important (motorway) to least important (service).
1 day ago · OpenStreetMap uses tags of the form key=value to add meaning to geographic objects. Taginfo collects information about these tags from several sources to help you understand what they mean and how they are used.
Motorway Motorway Motorway Motorway Motorway Main road Main road Main road
Jan 19, 2023 · The recommended key, value pair for tagging shopping mall features in OSM is shop, and mall, respectively. In practice, however, features can be tagged in all sorts of idiosyncratic ways. In this example, the contributor tagged the building correctly using the shop key with the mall value.
The simplest type of database is a key-value store, storing an association between a key, and its value. Thus, an entity can have an very large number of tags: key-value pairs associated with it. This kind of storage is one kind of the NoSQL databases.
