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December 20, 2020 08:19
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Visualize large CSV file https://github.com/graphhopper/graphhopper/pull/1577
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var lineLayer = L.geoJson().addTo(mapLayer.getMap()); | |
lineLayer.options.style = function (feature) { | |
var p = feature.properties || {}; | |
return {color:p.color||"gray", weight:p.weight||2, opacity:0.5}; | |
} | |
var counter = 0; | |
var timeLimit = 10 * 30; | |
var Papa = require("papaparse"); | |
Papa.parse("http://127.0.0.1:8989/spt?point=51.351201,12.398071&time_limit="+timeLimit+"&columns=prev_longitude,prev_latitude,longitude,latitude,time,road_environment", { | |
download: true, | |
worker: true, // the UI should stay reactive while downloading | |
step: function(results) { | |
var d = results.data; | |
// the root node has null for the previous values and time==0 | |
if(counter > 0 && d[4] > 0) { | |
var properties = {}; | |
if (d[5] === "tunnel") | |
properties = {weight: 3, color: "red"}; | |
else if(d[5] === "bridge") | |
properties = {weight: 3, color: "orange"}; | |
lineLayer.addData({type:"Feature",properties: properties,geometry:{type:"LineString",coordinates:[[d[0],d[1]],[d[2],d[3]]]}}); | |
} | |
counter++; | |
}, | |
complete: function() { | |
console.log("All done for /spt! " + counter); | |
} | |
}); |
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var lineLayer = L.geoJson().addTo(mapLayer.getMap()); | |
lineLayer.options.style = function (feature) { | |
var p = feature.properties || {}; | |
return {color:p.color||"gray", weight:p.weight||2, opacity:0.5}; | |
} | |
var counter = 0; | |
var timeLimit = 10 * 30; | |
var Papa = require("papaparse"); | |
Papa.parse("http://127.0.0.1:8989/spt?point=52.321911,10.393066&time_limit="+timeLimit+"&columns=prev_longitude,prev_latitude,longitude,latitude,time", { | |
download: true, | |
worker: true, // the UI should stay reactive while downloading | |
step: function(results) { | |
var d = results.data; | |
// the root node has null for the previous values and time==0 | |
if(counter > 0 && d[4] > 0) { | |
var r = d[4] / 1000.0 / timeLimit; | |
// TODO can we avoid parsing the Color here? | |
var colorStr = "rgb("+255 * (1 - r)+","+ 128 * r+","+ 255 * r+")"; | |
lineLayer.addData({type:"Feature",properties:{color:colorStr},geometry:{type:"LineString",coordinates:[[d[0],d[1]],[d[2],d[3]]]}}); | |
} | |
counter++; | |
}, | |
complete: function() { | |
console.log("All done for /spt! " + counter); | |
} | |
}); |
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With the help from @karussell, I have been able to create the SPT map. I have tested it with graphhopper/graphhopper@da16984.
Here are the steps. Start with GraphHopper repo clone and create a new branch:
Edit
config.yml
and uncomment the following:Start the web server with
your-area.pbf
:Open another terminal window and go to the same GraphHopper directory that we just clone and started the web server above. Now we will go to
web
directory:edit
main-template.js
file insideweb/src/main/resources/assets/
:Search for
mapLayer.initMap
and put snippet.js below the first occurrence and save themain-template.js
file.Now install
papaparse
and run server:Open GraphHopper web UI at http://127.0.0.1:8989/maps/?point=&layer=Omniscale%20Dev to see the SPT map.