WayPoints from GeoJson

[Didier-W]

Hello,
I want to use the LeafLet Routing Machine solution with a fixed starting point that will be the same as the arrival point whose coordinates I know. For this, no problem.
I want the intermediate WayPoints coordinates to come from a GeoJson structure of the following type:

const sites_culture = {
"type": "FeatureCollection",
"name": "sites_culture",
"crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
"features": [
{ "type": "Feature", "properties": { "name": "MUSEON ARLATEN", "address": "29 Rue de la République", "commune": "13200 ARLES", "tel": "04 13 31 51 79/99", "policy": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.626015921662016, 43.676486873401274 ] } },
{ "type": "Feature", "properties": { "name": "MDAA - ARLES", "address": "29 Rue de la République", "municipality": "13200 ARLES", "tel": "04 13 31 51 03", "politics": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.616614226966669, 43.67205666986852 ] } },
{ "type": "Feature", "properties": { "name": "Etang des Aulnes - SAINT-MARTIN-DE-CRAU", "address": "1676 Chemin d'Istres à l'Etang des Aulnes", "municipality": "13310 SAINT-MARTIN-DE-CRAU", "tel": "04 13 31 63 96", "politics": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.78871613086454, 43.59676153502288 ] } },
{ "type": "Feature", "properties": { "name": "Château d'Avignon - SAINTES-MARIES-DE-LA-MER", "address": "RD 570", "municipality": "13460 SAINTES-MARIES-DE-LA-MER", "tel": "04 13 31 13 13", "politics": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.411424362314144, 43.55804568265447 ] } },
{ "type": "Feature", "properties": { "name": "Archives et Bibliothèque Départementales des Bouches-du Rhône", "adresse": "18 - 20 Rue Mirès", "commune": "13003 MARSEILLE", "tel": "04 13 31 82 00", "politique": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 5.369675449734724, 43.31173470954983 ] } }
]
}

How should I call these coordinates in the intermediate WayPoints?

var control = L.Routing.control({
waypoints: [
L.latLng(43.27493085740852, 5.695082510623004),
L.latLng(?, ?),
...
L.latLng(?, ?),
L.latLng(43.27493085740852, 5.695082510623004)
],
router: new L.Routing.osrmv1({
language: 'en',
profile: 'car'
}),
geocoder: L.Control.Geocoder.nominatim({}),
routeWhileDragging: true,
reverseWaypoints: true,
fitSelectedRoutes: true
}).addTo(map);

Thank you in advance for your help.
Didier

[curtisy1]

Hey @Didier-W
if you know the coordinates beforehand, you can add them as waypoints directly by spreading them after mapping

var control = L.Routing.control({
waypoints: [
L.latLng(43.27493085740852, 5.695082510623004),
...sites_culture.features.map(x => L.latlng(x.geometry.coordinates))
L.latLng(43.27493085740852, 5.695082510623004)
],
router: new L.Routing.osrmv1({
language: 'en',
profile: 'car'
}),
geocoder: L.Control.Geocoder.nominatim({}),
routeWhileDragging: true,
reverseWaypoints: true,
fitSelectedRoutes: true
}).addTo(map);

You might have to do some more manipulation if your GeoJson has other types than points (with more than one coordinate)

If you don't know them when initializing the routing machine, you can call setWaypoints like in this example

const waypoints = control.getWaypoints();
control.setWaypoints([waypoints[0], ...sites_culture.features.map(x => L.latlng(x.geometry.coordinates)), waypoints[waypoints.length - 1]]);

I hope this helps. If you need further help, feel free to let me know

[Didier-W]

Good evening,
Sorry for my English, it's not my native language.
I'm tinkering with Leaflet, GeoJson and JavaScript (I'm more comfortable with PHP and SQL :-)).
Thank you for your answer. I tried, but it doesn't work.
Here is the code of my page:

<title>Leaflet Routing Machine Example</title> <script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet-routing-machine/3.2.5/leaflet-routing-machine.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/perliedman-leaflet-control-geocoder/1.5.5/Control.Geocoder.min.js"></script> <style> .map { position: absolute; width: 100%; height: 100%; } </style>

<script>
  var mymap = L.map('mapid').setView([43.27493085740852, 5.695082510623004], 10);

console.log(mymap);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png').addTo(mymap);

var sites_culture = {
"type": "FeatureCollection",
"name": "sites_culture",
"crs": { "type": "name", "properties": { "name": "urn:ogc:def:crs:OGC:1.3:CRS84" } },
"features": [
{ "type": "Feature", "properties": { "name": "MUSEON ARLATEN", "address": "29 Rue de la République", "commune": "13200 ARLES", "tel": "04 13 31 51 79/99", "policy": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.626015921662016, 43.676486873401274 ] } },
{ "type": "Feature", "properties": { "name": "MDAA - ARLES", "address": "29 Rue de la République", "municipality": "13200 ARLES", "tel": "04 13 31 51 03", "politics": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.616614226966669, 43.67205666986852 ] } },
{ "type": "Feature", "properties": { "name": "Etang des Aulnes - SAINT-MARTIN-DE-CRAU", "address": "1676 Chemin d'Istres à l'Etang des Aulnes", "municipality": "13310 SAINT-MARTIN-DE-CRAU", "tel": "04 13 31 63 96", "politics": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.78871613086454, 43.59676153502288 ] } },
{ "type": "Feature", "properties": { "name": "Château d'Avignon - SAINTES-MARIES-DE-LA-MER", "address": "RD 570", "municipality": "13460 SAINTES-MARIES-DE-LA-MER", "tel": "04 13 31 13 13", "politics": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 4.411424362314144, 43.55804568265447 ] } },
{ "type": "Feature", "properties": { "name": "Archives et Bibliothèque Départementales des Bouches-du Rhône", "adresse": "18 - 20 Rue Mirès", "commune": "13003 MARSEILLE", "tel": "04 13 31 82 00", "politique": "Culture" }, "geometry": { "type": "Point", "coordinates": [ 5.369675449734724, 43.31173470954983 ] } }
]
};

var control = L.Routing.control({
waypoints: [
L.latLng(43.27493085740852, 5.695082510623004),
sites_culture.features.map(x => L.latlng(x.geometry.coordinates)),
L.latLng(43.27493085740852, 5.695082510623004)
],
router: new L.Routing.osrmv1({
language: 'en',
profile: 'car'
}),
geocoder: L.Control.Geocoder.nominatim({}),
routeWhileDragging: true,
reverseWaypoints: true,
fitSelectedRoutes: true
}).addTo(mymap);

</script>

Thanks again for the help you can all give me.
Didier

[Didier-W]

Hello,
ChatGPT gave me the solution below that works. But I have to continue because I now want to sort the stages of my route according to the properties of the GeoJson :

<title>Leaflet Routing Machine Example</title> <script src="https://unpkg.com/leaflet@1.2.0/dist/leaflet.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/leaflet-routing-machine/3.2.5/leaflet-routing-machine.js"></script> <script src="https://cdnjs.cloudflare.com/ajax/libs/perliedman-leaflet-control-geocoder/1.5.5/Control.Geocoder.min.js"></script> <style> .map { position: absolute; width: 100%; height: 100%; } </style>

<!-- Chargement des coordonnées des Sites -->
<script type="text/javascript" src="../zonages/OLD/sites_routes.geojson"></script>

<script>
  var mymap = L.map('mapid').setView([43.27493085740852, 5.695082510623004], 10);
  L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png').addTo(mymap);

  // Point de départ et d'arrivée
  var startEndPoint = L.latLng(43.3159505241721, 5.407132739677479);

  // Extraire les coordonnées des points intermédiaires
  var waypoints = [startEndPoint];
  sites_routes.features.forEach(function(feature) {
      var coords = feature.geometry.coordinates;
      waypoints.push(L.latLng(coords[1], coords[0])); // Inverser latitude et longitude
  });
  waypoints.push(startEndPoint); // Retour au point de départ

  // Créer le contrôle de routage
  L.Routing.control({
      waypoints: waypoints,
      router: new L.Routing.osrmv1({
          language: 'en',
          profile: 'car'
      }),
      geocoder: L.Control.Geocoder.nominatim({}),
      routeWhileDragging: true,
      reverseWaypoints: true,
      fitSelectedRoutes: true
  }).addTo(mymap);
</script>

Is it possible to add a filter like this one :

filter: function(feature, layer) {
if(feature.properties.politique === "Routes") return true
}

Thank you.
Have a nice day.

[curtisy1]

Do you only want to add the waypoints if they are of politique "Routes"?
If so, you can do something like this and it should work:

sites_routes.features.forEach(function(feature) {
	var coords = feature.geometry.coordinates;
	if (feature.properties.politique === "Routes") {
		waypoints.push(L.latLng(coords[1], coords[0])); // Inverser latitude et longitude
	}
});

[Didier-W]

Bonjour,
Merci pour votre aide.
J'ai résolu mon problème et sui même allé un peu plus loin en ajoutant des variables à mon URL qui sont exploitées par le code et permettent de faire un tri dans le fichier sites.geojson :

<!-- Chargement des coordonnées des Sites -->
<script type="text/javascript" src="../zonages/sites.geojson"></script>

<script>

    const urlParams = new URLSearchParams(window.location.search);
    const jour = urlParams.get('jour');
    const passage = urlParams.get('passage');
    const secteur = urlParams.get('secteur');

    var mymap = L.map('mapid').setView([43.27493085740852, 5.695082510623004], 10);
    L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png').addTo(mymap);
  
    // Point de départ et d'arrivée
    var startEndPoint = L.latLng(43.31605078149452, 5.4071400476197224);
  
    // Extraire les coordonnées des points intermédiaires
    var waypoints = [startEndPoint];
    sites.features.forEach(function(feature) {
        var properties = feature.properties;
        var coords = feature.geometry.coordinates;
  
        // Appliquer les filtres
        if (jour === "lundi") {
            if (
              properties.lundi === passage &&
              properties.secteur === secteur
          ) {
              waypoints.push(L.latLng(coords[1], coords[0])); // Ajouter le point correspondant
          }
        }
        if (jour === "mardi") {
            if (
              properties.mardi === passage &&
              properties.secteur === secteur
          ) {
              waypoints.push(L.latLng(coords[1], coords[0])); // Ajouter le point correspondant
          }
        }
        if (jour === "mercredi") {
            if (
              properties.mercredi === passage &&
              properties.secteur === secteur
          ) {
              waypoints.push(L.latLng(coords[1], coords[0])); // Ajouter le point correspondant
          }
        }
        if (jour === "jeudi") {
            if (
              properties.jeudi === passage &&
              properties.secteur === secteur
          ) {
              waypoints.push(L.latLng(coords[1], coords[0])); // Ajouter le point correspondant
          }
        }
        if (jour === "vendredi") {
            if (
              properties.vendredi === passage &&
              properties.secteur === secteur
          ) {
              waypoints.push(L.latLng(coords[1], coords[0])); // Ajouter le point correspondant
          }
        }
    });
    waypoints.push(startEndPoint); // Retour au point de départ
  
    // Créer le contrôle de routage
    L.Routing.control({
        waypoints: waypoints,
        router: new L.Routing.osrmv1({
            language: 'en',
            profile: 'car'
        }),
        geocoder: L.Control.Geocoder.nominatim({}),
        routeWhileDragging: true,
        reverseWaypoints: true,
        fitSelectedRoutes: true
    }).addTo(mymap);

  </script>

Bonne journée.
Didier

[curtisy1]

De rien. Si je peux vous recommander une petite amélioration du code, vous pouvez utiliser la variable jour avec les arrays directement. Avec ce code, vous avez un seul point pour ajouter les coordonnées au array

            if (
              properties[jour] === passage &&
              properties.secteur === secteur
          ) {
              waypoints.push(L.latLng(coords[1], coords[0])); // Ajouter le point correspondant
          }

I hope my French was not too bad 😆 it's been a few years since I've spoken French

[Didier-W]

Bonsoir,
Je vous remercie pour cette suggestion. Je vais la tester.
Pour ce qui concerne votre français, il est parfait : aucune faute d'orthographe, pas d'erreur de style. Bravo !
Passez une excellente soirée.
A bientôt.