OpenStreetMap for the Semantic Web
LinkedGeoData (LGD) is an effort to add a spatial dimension to the Web of Data / Semantic Web. LinkedGeoData uses the information collected by the OpenStreetMap project and makes it available as an RDF knowledge base according to the Linked Data principles. It interlinks this data with other knowledge bases in the Linking Open Data initiative.
The project web site can be found here. If you are running Ubuntu then this repository contains everything you need to transform OpenStreetMap data to RDF yourself. For other systems please consider contributing adaptions of the existing scripts.
The following commands should get you started with a running Monaco dataset:
git clone https://github.com/GeoKnow/LinkedGeoData.git
cd LinkedGeoData
make clean
make
docker-compose up
# Quirk: Sometimes the nominatim container startup fails
# indicated by an error message that only reverse-only search is available
# In that case restart the container:
docker-compose restart lgd-nominatim-web
Services will run under these ports:
.env
. does not exist then the make
invocation will also create it from env.dist
..env
file by default contains the setting PROJECT_NAME=linkedgeodata
. Make sure that the project name matches the lower-case spelling of the name of the folder containing the git repo.${parent-directory}_${service-name}-vol
. For example linkedgeodata_lgd-osmosis-sync-vol
. You can check existing volumes with docker volume ls
.The architecture shown in the image below. The docker setup is located in the linkedgeodata-docker folder.
.osm.pdf
file.This project requires Make and Apache Maven to build (Java 11+ required). Maven builds are not dockerized. Therefore any built artifacts will be cached in the local repository as usual.
They include the SQL files and mappings that enable rewriting SPARQL queries to SQL ones over an OpenStreetMap (and Nominatim) database. Furthermore, bash scripts are avaiable for helping setting up an LGD database. The mavenization and dockerization re-package these resources.
The following folders contain resources that are copied when building the lgd-tools-resources
jar bundle
The scripts in the bin folder become part of the debian packaging of the cli tools lgd-tools-pkg-deb-cli
There is a pom.xml that creates a jar file from a snapshot of the nominatim git. Especially for development this is much faster than repeated clones of the full git repo.
The docker-based architecture is aimed at making it easy to contribute new or alternative components that can sit side-by-side with the core of the system - which is the a virtual knowledge graph view over an OSM database. Please open issues for discussion.
Examples include but are not limited to:
Dockerfiles for services such as a Linked Data or SPARQL interfaces should be designed to allow configuration of the target SPARQL endpoint(s), ideally via the docker environment.
The content of this project are licensed under the GPL v3 License.