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Imposm parser for OpenStreetMap QA tiles

Project Description

An [imposm parser]( for [OSM QA tiles]( osmqa-parser was written for use with [tile-reduce-py]( and [osmgraph](


The parser should be used with an imposm importer such as the one found in osmgraph.

Data Model Caveats

OSM QA tiles are delivered as [Mapbox Vector Tiles]( It is impossible to exactly reconstruct the original OSM data from a vector tile.

Because ways in a QA tile contain a coordinate sequence instead of a node sequence, we can’t distinguish different nodes that have the same tile coordinate. osmqa-parser assigns unique node IDs based on tile coordinate. As a result, it’s possible we introduce false intersections which arise when two ways have different nodes that have the same coordinates. Also, different nodes that fall on the same tile coordinate will have identical node IDs, which usually means their tags are merged together as one.

Release History

This version
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Supported By

Elastic Elastic Search Pingdom Pingdom Monitoring Dyn Dyn DNS Sentry Sentry Error Logging CloudAMQP CloudAMQP RabbitMQ Heroku Heroku PaaS Kabu Creative Kabu Creative UX & Design Fastly Fastly CDN DigiCert DigiCert EV Certificate Google Google Cloud Servers