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https://github.com/cfpwastaken/planetiler-openmaptiles.git
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68 lines
3.6 KiB
Markdown
68 lines
3.6 KiB
Markdown
# Planetiler OpenMapTiles Profile
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This OpenMapTiles profile is based on [OpenMapTiles](https://github.com/openmaptiles/openmaptiles).
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See [README.md](https://github.com/onthegomap/planetiler/blob/main/README.md) in the parent repository for instructions on how to run.
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## Differences from OpenMapTiles
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- Road name abbreviations are not implemented yet in the `transportation_name` layer
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- `agg_stop` tag not implemented yet in the `poi` layer
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- `brunnel` tag is excluded from `transportation_name` layer to avoid breaking apart long `transportation_name`
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lines, to revert this behavior set `--transportation-name-brunnel=true`
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- `rank` field on `mountain_peak` linestrings only has 3 levels (1: has wikipedia page and name, 2: has name, 3: no name
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or wikipedia page or name)
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## Code Layout
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[Generate.java](./src/main/java/com/onthegomap/planetiler/openmaptiles/Generate.java) generates code in
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the [generated](./src/main/java/com/onthegomap/planetiler/openmaptiles/generated) package from an OpenMapTiles tag in GitHub:
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- [OpenMapTilesSchema](./src/main/java/com/onthegomap/planetiler/openmaptiles/generated/OpenMapTilesSchema.java)
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contains an interface for each layer with constants for the name, attributes, and allowed values for each tag in that
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layer
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- [Tables](./src/main/java/com/onthegomap/planetiler/openmaptiles/generated/Tables.java)
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contains a record for each table that OpenMapTiles [imposm3](https://github.com/omniscale/imposm3) configuration
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generates (along with the tag-filtering expression) so layers can listen on instances of those records instead of
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doing the tag filtering and parsing themselves
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The [layers](./src/main/java/com/onthegomap/planetiler/openmaptiles/layers) package contains a port of the SQL logic to
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generate each layer from OpenMapTiles. Layers define how source features (or parsed imposm3 table rows) map to vector
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tile features, and logic for post-processing tile geometries.
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[OpenMapTilesProfile](./src/main/java/com/onthegomap/planetiler/openmaptiles/OpenMapTilesProfile.java) dispatches source features to
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layer handlers and merges the results.
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[OpenMapTilesMain](./src/main/java/com/onthegomap/planetiler/openmaptiles/OpenMapTilesMain.java) is the main driver that registers
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source data and output location.
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## Regenerating Code
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To run `Generate.java`, use [scripts/regenerate-openmaptiles.sh](https://github.com/onthegomap/planetiler/blob/main/scripts/regenerate-openmaptiles.sh) script with the
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OpenMapTiles release tag:
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```bash
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./scripts/regenerate-openmaptiles.sh v3.13.1
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```
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Then follow the instructions it prints for reformatting generated code.
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If you want to regenerate from a different repository than the default openmaptiles, you can specify the url like this:
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```bash
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./scripts/regenerate-openmaptiles.sh v3.13.1 https://raw.githubusercontent.com/openmaptiles/openmaptiles/
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```
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## License
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All code in this repository is under the [BSD license](./LICENSE.md) and the cartography decisions encoded in the schema and SQL are licensed under [CC-BY](./LICENSE.md).
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Products or services using maps derived from OpenMapTiles schema need to visibly credit "OpenMapTiles.org" or reference "OpenMapTiles" with a link to https://openmaptiles.org/. Exceptions to attribution requirement can be granted on request.
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For a browsable electronic map based on OpenMapTiles and OpenStreetMap data, the
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credit should appear in the corner of the map. For example:
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[© OpenMapTiles](https://openmaptiles.org/) [© OpenStreetMap contributors](https://www.openstreetmap.org/copyright)
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For printed and static maps a similar attribution should be made in a textual
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description near the image, in the same fashion as if you cite a photograph.
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