https://github.com/trailbehind/changegen

Generation of OSM changefiles from PostGIS database tables and Planet files.
https://github.com/trailbehind/changegen

Last synced: 3 days ago
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Generation of OSM changefiles from PostGIS database tables and Planet files.

• Host: GitHub
• URL: https://github.com/trailbehind/changegen
• Owner: trailbehind
• License: mit
• Created: 2020-12-15T20:56:43.000Z (almost 4 years ago)
• Default Branch: master
• Last Pushed: 2022-10-27T16:34:41.000Z (about 2 years ago)
• Last Synced: 2023-04-21T10:26:32.458Z (over 1 year ago)
• Language: Python
• Homepage: https://trailbehind.github.io/changegen/
• Size: 1.8 MB
• Stars: 3
• Watchers: 6
• Forks: 0
• Open Issues: 8
• Metadata Files:
  • Readme: README.md
  • Changelog: changegen/.dockerignore
  • License: MIT-LICENSE.txt

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README

        
# OSM Changefile Generator (`changegen`)

[![Codeship Status for trailbehind/changegen](https://app.codeship.com/projects/824fe25d-68b7-4dde-9ec9-638b52ae0859/status?branch=master)](https://app.codeship.com/projects/452582)

_more info on testing in_ [_`test/README`_](./test/README.md)

Changegen is a command-line application for generating OpenStreeMap [changefiles](https://wiki.openstreetmap.org/wiki/OsmChange) from database tables and their source extract. This software is designed to support PostGIS/Imposm-based workflows for conflation of third-party data with OSM. The resulting changefiles can be used post-conflation to enable the updating of the source Planet file (or any other extract) with newly-conflated data via software such as [Osmosis](https://wiki.openstreetmap.org/wiki/Osmosis).

The primary output of this software are `.osc` files, described in detail [here](https://wiki.openstreetmap.org/wiki/OsmChange). (_It is important to note that `.osc` change files are distinct from [OSM Change Sets](https://wiki.openstreetmap.org/wiki/Changeset)_)

Main Features:

- Ensures properly noded junctions (e.g. intersecting Ways always share a Node).

- Preserves topology of existing OSM network.

- Configurable ID generation (negative IDs, arbitrary offsets)

- Use of GDAL for efficient geodata processing

This software is currently in an alpha release, and will change rapidly.

## Contributing

We welcome pull requests for consideration. This repository uses pre-commit hooks to validate contributions for style. Please [install and enable `pre-commit`](https://pre-commit.com/#quick-start).