isabella232 / flowmap.query

An exploratory visualization tool for the analysis of movements between geographic locations

flowmap.query

An exploratory visualization tool for the analysis of movements between geographic locations (Origin-Destination data with attributes).

Try the LIVE DEMO.

Database

flowmap.query currently only supports ClickHouse as its database backend. ClickHouse is a scalable column-oriented database. It's shows great query performance especially for aggregation queries over large single-table datasets. This makes ClickHouse a great choice for supporting interactive analysis of OD-datasets with attributes.

We plan to add support for BigQuery and Google Sheets in the future.

Running in the cloud

Running flowmap.query on DigitalOcean: Step-by-step guide.

Related reading

• How to install ClickHouse in DigitalOcean.
• How to set up a Node.js app in DigitalOcean.
• A tutorial describing how to load US flight delays dataset containing 166 million rows into ClickHouse.
• Benchmarking ClickHouse on the 1.1 Billion Taxi Rides dataset: on a single machine and in an AWS EC2 cluster. The author also describes in detail how to prepare and ingest the whole dataset.

Running locally

Add a .env file with ClickHouse URL:

CLICKHOUSE_URL=http://localhost:8123?enable_http_compression=1&password=YOUR_CLICKHOUSE_PASSWORD"

Add a client/.env file with the Mapbox access token:

REACT_APP_MapboxAccessToken=...

To build:

npm install
cd client && npm install && npm run build && cd ..

Then, to start in production mode:

npm start      

Running in dev mode

Run in the root folder:

npm run dev

Alternatively, you can run the server and the client separately:

npm run dev:server
npm run dev:client

Credits

Developed by Ilya Boyandin at Teralytics.