alexmclarty/alexmclarty.github.io

Kayapp

Hacky POC experimenting with GeoJSON.

Rough Idea

• Use OSM data for countries, regions, rivers
• Add own data about RiverSections, RiverFeatures, Hazards and store as geojson.
• Feed data back to OSM. Maybe using whitewater properties?

Rough process

• Get river data from OSM/https://overpass-turbo.eu
• Load into https://geojson.io
• Remove features
• Add Feature properties to GeoJSON
• Add into array (currently hardcoded)

Getting data

https://overpass-turbo.eu has cryptic syntax.

This Python script uses Nomanatim to get a boundary:

https://github.com/KaartGroup/localModelScripts/tree/master/get_country_boundary

TODO

• Data
  • Country (UK)
  • All Regions
  • Two Rivers
  • RiverSections
  • RiverFeatures (added as GeoJSON properties?)
• UI
  • Display
    • Country
    • Region
    • River
    • RiverSection
    • Features
  • Click RiverFeature and see properties
  • Click River and see RiverFeatures
  • Click RiverSection and see RiverFeatures
  • Search for RiverFeatures by properties
    • grade
    • name?
    • FeatureType?
    • river
  • associations between RiverFeature, River and RiverSection
    • @relations?
  • Icons for RiverFeatures
    • Rapid
    • Waterfall
    • Access
    • Egress
    • Hazard

Longer term TODO

• River levels
  • Poll EA API to get river levels
  • Store somewhere (time series?)
  • Use CEH catchment area data, overlay for river
  • Display weather information for catchment area
  • User journal
  • Check-in
    • Duration
    • Difficulty
    • River level calibration
• Weather
• Catchment
  • si

Assumptions

• Most users won't want to add features.
• Most users will want to view Rivers, RiverSections and RiverFeatures.
• You'd need an approval process for adding features if users wanted to do this:
  • duplicates
  • mistakes
  • spam

Useful resources

• https://stackoverflow.com/questions/38483868/leaflet-js-draw-line-along-rivers-between-two-points
• https://leafletjs.com/examples/quick-start/
• https://leafletjs.com/examples/geojson/
• https://geojson.io/ or https://geojson.net