H3-Presto

This library provides Presto bindings for the H3 Core Library via a Presto plugin. For API reference, please see the H3 Documentation.

Usage

You will need to install the plugin on all nodes of your Presto cluster. For convenience of deployment, the plugin is distributed as a shaded Jar with the dependencies such as H3-Java and Guava packaged in.

Once installed, Presto will automatically load the H3Plugin at startup and the functions will then be available from SQL, e.g.:

SELECT h3_latlng_to_cell(lat, lng, 9) AS hex FROM my_table;

Development

Building the library requires a JDK and Maven. To install to your local Maven cache, run:

mvn install

To build the library, run:

mvn package

To build the documentation site, run:

mvn site

To format source code as required by CI, run:

mvn com.spotify.fmt:fmt-maven-plugin:format

Release

Releasing uses a process along the lines of h3-java's release process.

mvn release:prepare
mvn release:perform

(As this library does not have native build steps, we plan to automate this in the future.)

Legal and Licensing

Copyright 2022 Foursquare Labs, Inc. H3-Presto is licensed under the Apache 2.0 License.

H3 Copyright 2016 Uber Technologies, Inc.

DGGRID Copyright (c) 2015 Southern Oregon University