Same cluster is returned from two tiles #254
Description
I'm guessing this is related to a precision issue, but I wanted to report this anyway to make sure that's the root cause.
In the following example a cluster is requested from two different tiles and is returned from both of them.
This creates a duplication of the cluster (although one can filter by unique ID).
Let me know if you need more information in order to look into it.
This was originally reported here:
I just removed most of the code around it that maplibre/mapbox uses.
<!DOCTYPE html>
<html lang="en">
<head>
<script src="https://unpkg.com/supercluster@8.0.0/dist/supercluster.min.js"></script>
</head>
<body>
<script>
const mountains = [
{
"name": "Ben More",
"height": 966,
"longitude": -6.0152005136723,
"latitude": 56.424106997002,
"description": ""
},
{
"name": "A' Chioch",
"height": 868,
"longitude": -5.9993112842696,
"latitude": 56.427318748488,
"description": ""
},
];
const mountainFeatures = mountains.reduce(
(acc, mountain) => {
acc.features.push({
type: "Feature",
geometry: {
type: "Point",
coordinates: [mountain.longitude, mountain.latitude],
},
properties: {
name: mountain.name,
description: mountain.description,
height: mountain.height,
},
});
return acc;
},
{
type: "FeatureCollection",
features: [],
}
);
try {
const index = new Supercluster({
clusterRadius: 27
});
index.load(mountainFeatures.features);
const a = index.getTile(1, 0, 0);
const b = index.getTile(1, 1, 0);
console.log(a.features.length + (b != null ? b.features.length : 0));
} catch (ex) {
console.log(ex.message);
}
</script>
</body>
</html>