points in useClusterer are empty

[Vin-Xi]

Issue

No markers were being rendered on my map. So I logged the points returned by useClusterer hook, it returned an empty array. So I tried using getRandomData from example, even that returned an empty array.

I have tried going into the library and have figured out by logging at various places that, this.cppInstance.getCluster is returning an empty array. There seems to be an issue from there or maybe I am not meeting some requirements for data.

Code

Click to expand

const {width, height} = Dimensions.get('window');
const MAP_DIM = {width, height};


const Map = () => {
  
  const [region, setRegion] = useState({
    latitude: 25.276987,
    longitude: 55.296249,
    latitudeDelta: 0.0922,
    longitudeDelta: 0.0421,
  });

  const [points,supercluster] = useClusterer(
    gen,
    MAP_DIM,
    region
  )
  ......

//MOCKDATA


export const gen = Array.from(new Array(10), (_, index) => (
  {
    type: "Feature" as "Feature",
    properties: {
      title: `${index}`,
      id: index,
    },
    geometry: {
      type: 'Point' as "Point",
      coordinates: [baseLatitude - Math.random(), baseLongitude + Math.random()]
    },
  }
));

Environment

Click to expand

Package version:

react-native:0.70
react-native-clusterer: 1.2.2,
react-native-maps: 1.3.2,

System:
OS: Windows 10 10.0.19044
CPU: (8) x64 Intel(R) Core(TM) i7-6700 CPU @ 3.40GHz
Memory: 14.69 GB / 31.88 GB
Binaries:
Node: 16.15.1 - C:\Program Files\nodejs\node.EXE
Yarn: Not Found
npm: 8.11.0 - C:\Program Files\nodejs\npm.CMD
Watchman: Not Found
SDKs:
Android SDK: Not Found
Windows SDK: Not Found
IDEs:
Android Studio: AI-212.5712.43.2112.8609683
Visual Studio: Not Found
Languages:
Java: 18.0.1.1 - C:\Program Files\Common Files\Oracle\Java\javapath\javac.EXE
npmPackages:
@react-native-community/cli: Not Found
react: 18.1.0 => 18.1.0
react-native: 0.70.0 => 0.70.0
react-native-windows: Not Found
npmGlobalPackages:
react-native: Not Found

[vytautasvargonas]

@Vin-Xi Have you figured out what the problem was?

[Vin-Xi]

No, seeing how this issue is stale. I would say you are better off using some other library for clustering

[endrits079]

@Vin-Xi what did you use?

[riddy6421]

Any luck?

[JiriHoffmann]

Seems like you inverted the coordinates - [lat, lng] instead of the correct [lng, lat]