69 lines
2.1 KiB
ReStructuredText
69 lines
2.1 KiB
ReStructuredText
Imposm
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Imposm is an importer for OpenStreetMap data. It reads PBF files and imports the data into PostgreSQL/PostGIS databases.
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It is designed to create databases that are optimized for rendering/tile/map-services.
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It is developed and supported by `Omniscale <http://omniscale.com>`_ and is released as open source under the `Apache Software License 2.0 <http://www.apache.org/licenses/LICENSE-2.0.html>`_. Imposm >=3 is a rewrite of Imposm 2 with even better performance and support for (minutely) diff updates.
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Features
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--------
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Custom database schemas
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It creates separate tables for different feature types. This allows easier styling and better performance for rendering in tile or WMS services.
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Multiple CPU/core support
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Imposm is parallel from the ground up. It distributes parsing and processing to multiple CPUs/cores.
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Unify values
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For example, the boolean values `1`, `on`, `true` and `yes` all become ``TRUE``.
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Filter by tags and values
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It only imports data you are going to render/use.
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Efficient nodes cache
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It is necessary to store all nodes to build ways and relations. Imposm uses a file-based key-value database to cache this data. This reduces the memory usage.
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Generalized tables
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It can automatically create tables with lower spatial resolutions, perfect for rendering large road networks in low resolutions for example.
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Limit to polygons
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It can limit imported geometries to polygons from GeoJSON.
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hstore support
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Don't know which tags you will be needing? Store all tags in an `hstore column <http://www.postgresql.org/docs/9.6/static/hstore.html>`_.
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Support
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-------
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There is a `mailing list at Google Groups <http://groups.google.com/group/imposm>`_ for all questions. You can subscribe by sending an email to: imposm+subscribe@googlegroups.com
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Development
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-----------
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The source code is available at: https://github.com/omniscale/imposm3/
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You can report any issues at: https://github.com/omniscale/imposm3/issues
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Contents
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--------
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.. toctree::
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:maxdepth: 2
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install
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tutorial
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mapping
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relations
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.. Indices and tables
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.. ==================
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..
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.. * :ref:`genindex`
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.. * :ref:`modindex`
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.. * :ref:`search`
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