Graffiti

Repository provides a tool for graffiti community to keep track and preserving street artwork in their areas.

Features

Distributed storage

The core of the project are geotagged photos stored in IPFS, meaning they are not stored in a central database, allowing users to only maintain the photos they are interested in. The data will be reachable as long as there is someone sharing them.

Metadata

The maintained graffiti collection can be annotated by the user in metadata, specifying OpenStreetMap node as a surface and tags for photos for better searchability.

Requirements

Getting started

docker-compose up -d --build
docker-compose up

In Docker log you should see the process is waiting for getting IPFS content:

graffiti-collection | 05:12:52.059 main — INFO 001 parsing graffiti metadata JSON file
graffiti-collection | 05:12:52.065 main — DEBU 002 parsed JSON with 545 elements
graffiti-collection | 05:12:52.065 main — INFO 003 getting IPFS content

This could take a few minutes to the fresh IPFS setup to discover the content source and start downloading images. You can monitor your IPFS instance running at https://localhost:4443.

When the downloading starts, you should observe the following log:

graffiti-collection | 05:16:05.238 main — DEBU 004 got metadata of 554 photos from IPFS
graffiti-collection | 05:16:06.207 main — DEBU 005 got raw tar of photos from IPFS: *shell.trailerReader: &{0xc000092120}
graffiti-collection | 05:16:06.209 main — INFO 006 parsing EXIF data from photos
graffiti-collection | 05:16:06.209 main — DEBU 007 parsing EXIF data for photo: IMG_20180216_000759.jpg
graffiti-collection | 05:16:06.211 main — DEBU 008 parsing EXIF data for photo: IMG_20180217_190142.jpg
...
graffiti-collection | 05:58:55.457 main — INFO 25c serving complete content at :8083/api
graffiti-collection | 05:58:55.457 main — INFO 25d serving geotagged content at :8083/geojson

When the data are served, the working map should be available on http://localhost:4567/

Troubleshooting

If the graffiti-collection container is hanging on getting IPFS content, it is probably because the route to content has not been discovered. To help the discovery, run:

docker exec -it graffiti-ipfs sh
ipfs ping QmZCtha6AHsaNRV1LScMXLewjx9M2imPTxKaP2ty2TJ219
exit

If your device is behind NAT, configure port forwarding: https://docs.ipfs.io/how-to/nat-configuration/#port-forwarding.

The graffiti-collection container should now successfully retrieve the photos as blobs from IPFS into data folder, and they should be visible on the map.

GitHub

https://github.com/romanblanco/graffiti