Staffs LUG 14th January 2020
5. OSM - Structure of Data
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XML data
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Server - written in Ruby on Rails
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Elements
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- Id - unique index
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- who created it - user, uid
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- when was it created - timestamp
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- changeset - collection of changes done together which can be rolled back
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Node – longitude/latitude (WGS84)
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Way – ordered list of nodes (polyline)
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Area – closed way
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Relation - Collection of other elements
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Each element can contains any number of Tags
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Tag – key & value
- - OSM Wiki for tag options
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