https://github.com/graphhopper/isochrone-experiments
Some experiments with isochrones
https://github.com/graphhopper/isochrone-experiments
Last synced: 11 months ago
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Some experiments with isochrones
- Host: GitHub
- URL: https://github.com/graphhopper/isochrone-experiments
- Owner: graphhopper
- Created: 2018-02-27T09:09:55.000Z (over 8 years ago)
- Default Branch: deckgl
- Last Pushed: 2019-08-27T21:24:02.000Z (almost 7 years ago)
- Last Synced: 2025-05-01T19:38:52.364Z (about 1 year ago)
- Language: JavaScript
- Homepage: https://www.graphhopper.com/blog/2018/07/04/high-precision-reachability/
- Size: 49.9 MB
- Stars: 7
- Watchers: 4
- Forks: 4
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# Isochrone Experiments
For these [isochrone](https://en.wikipedia.org/wiki/Isochrone_map) experiments you need a modified GraphHopper core server:
```bash
git clone https://github.com/graphhopper/graphhopper
cd graphhopper
git checkout isochrone-edgelist
./graphhopper.sh web your-area.pbf
```
# Update
A similar endpoint /spt is now available in a stable release via gzipped CSV since 0.13 (not a binary format). See [this PR](https://github.com/graphhopper/graphhopper/pull/1577).
## License
This project stands under the Apache License 2.0.
## Deck.gl Usage
This version uses a binary edgelist returned from the customized graphhopper
server set up above.
```bash
git clone https://github.com/graphhopper/isochrone-experiments
cd isochrone-experiments
git checkout deckgl
cd deckgl
# deck.gl requires a not too old npm version, I installed 10.x via nvm, then do:
npm install
# https://www.maptiler.com/cloud/
export Token=
npm start
```
## Mapbox GL JS
uses the native response via result=edgelist which is 5 times smaller (1) compared to the 'compact' JSON edge list
(mapbox-json folder)
```bash
git clone https://github.com/graphhopper/isochrone-experiments
cd isochrone-experiments
git checkout deckgl
cd mapbox-json
npx http-server
http://127.0.0.1:8081/index.html?key=
```
## Isochone as Vector Tile Source
See mvt folder and result=mvt
Too many problems at the moment:
* couldn't get it display the mvt (size is small but according to vtzero it
is a valid mvt)
* it takes ages to create the mvt with the used Java lib (>10sec)
* mapbox fetches the vector tiles per tile resulting in multiple calls where we would just need one