UD-Demo-DocGraph

A web application for visualizing multimedia document and 3D city models using RDF semantic graphs:

• UD-Viz a frontend web application for urban data visualization
  • In particular the SPARQL and Workspace modules from UD-Viz is used to visualize semantic urban data in the form of RDF
• Blazegraph an RDF-Store for storing and serving semantic graph data with a SPARQL REST API

Component Diagram

Installation

The following sections detail how to setup the demo.

Pre-requisites

• Install Docker

Component Setup

First, clone this repository

git clone https://github.com/VCityTeam/UD-Demo-DocGraph.git
cd UD-Demo-DocGraph

The following sections will describe how to configure this file for each component.

Build Images and run containers

Then build the Blazegraph docker image and run its container:

docker compose up

Upload RDF-Store Dataset

To upload the graph datafile into Blazegraph run the following command:

curl -X POST --data-binary 'uri=https://raw.githubusercontent.com/VCityTeam/UD-Demo-DocGraph/master/data/GratteCiel_2018_remarkable.ttl' 'http://127.0.0.1:8001/blazegraph/sparql'

Now the UD-Viz demo is ready and can be accessed from localhost:8000 The Blazegraph GUI can also be accessed from localhost:8001

Note

By default, the following ports are used by the following services:

• 8000: UD-Viz
• 8001: Blazegraph

To change these, you must:

1. Update your .env file to use these ports
2. Make sure to set the sparqlModule/url port in the ud-viz-context/assets/config/config.json file to use the new value for the new Blazegraph port.
   • This also may imply rebuilding the udviz container:

     docker compose stop udviz
     docker compose build udviz
     docker compose up udviz

3. Use the new port when uploading the dataset to Blazegraph