![]() Some database schemas provide native (e.g: PostGIS) geometries, which allows their use in other pieces of software which can read those geometry formats. Geometries Whether the schema has pre-built geometries. However, if you only need a small extract, then re-importing that extract may be a quicker and easier method to keep up-to-date than using the OsmChange diffs. This can be extremely important for keeping world-wide databases up-to-date, as it allows the database to be kept up-to-date without requiring a complete (and space- and time-consuming) full, worldwide re-import. Updatable Whether the schema supports updating with OsmChange format "diffs". OSM uses different database schemas for different applications: The database schema for the main API database () can be found here: Rails port/Database schema. Legacy XAPI applications can leverage the XAPI Compatibility Layer. The Xapi service allowed OSM data to be downloaded in OSM XML format for a given region of the globe, filtered by tag. It is highly recommended to get familiar with various features via overpass turbo, an interactive Web-based frontend. It’s query language is documented at Overpass QL guide/language reference. It acts as a database backend for various services. location, type of objects, tag properties, proximity, or combinations of them. In contrast to the editing API described in the previous API, the Overpass API is optimized for data consumers that need a few elements within a glimpse or up to roughly 10 million elements in some minutes, both selected by search criteria like e.g. The Overpass API is a read-only API that serves up custom selected parts of the OSM map data. Use other methods for rendering, routing or other purposes. This method of obtaining data should therefore be reserved for editing applications.it will only return very small areas The API page provides a link to the specification of the protocol to be used to obtain data. The main API is the method of obtaining OSM data used by editors, as this is the only method of changing the OSM data in the live database. Some sources omit metadata from tag-less nodes to minimize space.ĭifferences between the live OSM data and the planet dump are also published each minute as changeset, so it is possible to maintain an up-to date copy of the OSM dataset. from GeoFabrik (pre-selected regions like by-state) or ProtoMaps (pbf data filtered by bounding polygon provides time-limited link to re-download the same data). Various tools are available to cut the Planet file up into smaller areas if required, but are also available pre-cut e.g. Quite a few people break this file down into smaller files for different regions and make extracts available separately on mirror servers. The format of the data is described in Data Primitives.Įvery week a dump of the entire current OSM dataset is saved in different formats and made available as Planet.osm. ![]() The most of the following methods of obtaining data return the data in the OSM XML format that can be used by other tools to populate the database. ![]() The various sources of OSM data (either the whole world, or a small part of it) are identified below with links to other Wiki pages which provide more detail. See also Downloading data for a run down of the basic options ![]()
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