Add overlay for snow plowing information at Konnerudgata

[leonardehrenfried]

Konnerrudgata is a street that leads from Drammen to Konnerud. It will serve as the pilot street for displaying snow plowing information.

In order to build a visualisation we have to take two questions into account:

• Is it currently snowing?
• When was the last time there was a snow plow on this street?

We want to visualise the answer these questions on the following color scale:

• White: it's currently covered in snow
• Green: has been plowed in the last 3 hours
• Red: Has been plowed more than 3 hours ago
• No overlay: not snowing

Mockup

Data sources

The data will be made available as two files in GeoJSON format - I will provide examples very soon.

Test mode

In order to see an example when it isn't snowing, we need to add a test mode which uses fake data.

Questions to be answered

• Should we use a backend or compute everything in the browser?

[leonardehrenfried]

First steps:

• [x] Write Java service to consume snow plowing Geojson
• [x] Filter out anything that is not inside of defined polygon around Konnerudgata
• [x] Take all remaining linestrings and look at start_data in properties
• [x] Put linestrings into two categories: older/younger than 3 hours old
• [x] Send Geojson to client
• [x] Visualise 2 types of linestrings in client