Standalone component to reproduce

Oct 13, 2025 by wbrum.org 32 views

Introduction

Mapbox GL is a popular library for rendering interactive maps in web and mobile applications. The @rnmapbox/maps library provides a React Native wrapper for Mapbox GL, allowing developers to easily integrate Mapbox maps into their React Native applications. However, some users have reported issues with the querySourceFeatures method when used with VectorSource in rnmapbox. In this article, we will explore the issue and provide a solution.

Mapbox Implementation

The Mapbox implementation used in this example is Mapbox GL. The version of Mapbox GL used is the default version.

Mapbox Version

The version of Mapbox used in this example is the default version.

React Native Version

The version of React Native used in this example is 0.75.3.

Platform

The platform used in this example is iOS.

`@rnmapbox/maps` version

The version of @rnmapbox/maps used in this example is 10.1.35.

Standalone component to reproduce

The following code snippet demonstrates a standalone component that reproduces the issue:

import React, { useRef } from 'react';
import MapboxGL from '@rnmapbox/maps';
import { View } from 'react-native';

const MapComponent = () => {
  const mapRef = useRef<MapboxGL.MapView>(null);

  const handlePress = async () => {
    try {
      const features = await mapRef.current?.querySourceFeatures(
        'dwr_wd', // ID of the source
        ['==', 'agencyname', 'Alameda County Flood Control District Zone 7'], // Filter
        ['dwr_wd_layer'] // ID of the layer
      );
      console.log('Features:', features);
    } catch (error) {
      console.error('Error fetching features:', error);
    }
  };

  return (
    <View style={{ flex: 1 }}>
      <MapboxGL.MapView
        ref={mapRef}
        style={{ flex: 1 }}
        onPress={handlePress}
      >
        <MapboxGL.Camera
          zoomLevel={10}
          centerCoordinate={[-121.8853, 37.3382]}
        />
        <MapboxGL.VectorSource
          id="dwr_wd"
          url="https://tiles.hydrascore.com/dwr_wd"
        >
          <MapboxGL.FillLayer
            id="dwr_wd_layer"
            sourceLayerID="dwr_wd"
            style={{
              fillColor: '#088',
              fillOpacity: 0.5,
            }}
          />
        </MapboxGL.VectorSource>
      </MapboxGL.MapView>
    </View>
  );
};

export default MapComponent;

Observed behavior and steps to reproduce

To reproduce the issue, follow these steps:

Create a VectorSource and FillLayer as shown in the code snippet above.
Ensure that the data is loading and rendering correctly on the map.
Try calling querySourceFeatures to get the features within the layer.
The function returns an empty array.

Expected behavior

The expected behavior is that the querySourceFeatures method should return the features within the layer.

Notes / preliminary analysis

No notes or preliminary analysis are available at this time.

Additional links and references

No additional links or references are available at this time.

Solution

After investigating the issue, it appears that the problem is caused by the fact that the querySourceFeatures method is not designed to work with VectorSource. The method is intended for use with GeoJSON sources, not VectorSource.

To fix the issue, you can use the querySourceFeatures method with a GeoJSON source instead of a VectorSource. Here is an updated code snippet that demonstrates how to use a GeoJSON source:

import React, { useRef } from 'react';
import MapboxGL from '@rnmapbox/maps';
import { View } from 'react-native';

const MapComponent = () => {
  const mapRef = useRef<MapboxGL.MapView>(null);

  const handlePress = async () => {
    try {
      const features = await mapRef.current?.querySourceFeatures(
        'geojson_source', // ID of the source
        ['==', 'agencyname', 'Alameda County Flood Control District Zone 7'], // Filter
        ['geojson_layer'] // ID of the layer
      );
      console.log('Features:', features);
    } catch (error) {
      console.error('Error fetching features:', error);
    }
  };

  return (
    <View style={{ flex: 1 }}>
      <MapboxGL.MapView
        ref={mapRef}
        style={{ flex: 1 }}
        onPress={handlePress}
      >
        <MapboxGL.Camera
          zoomLevel={10}
          centerCoordinate={[-121.8853, 37.3382]}
        />
        <MapboxGL.GeoJSONSource
          id="geojson_source"
          url="https://example.com/geojson.json"
        >
          <MapboxGL.FillLayer
            id="geojson_layer"
            sourceLayerID="geojson_source"
            style={{
              fillColor: '#088',
              fillOpacity: 0.5,
            }}
          />
        </MapboxGL.GeoJSONSource>
      </MapboxGL.MapView>
    </View>
  );
};

export default MapComponent;

In this updated code snippet, we use a GeoJSON source instead of a VectorSource. We also update the querySourceFeatures method to use the ID of the GeoJSON source and the ID of the layer.

Conclusion

Q: What is the issue with querySourceFeatures and VectorSource in rnmapbox?

A: The issue is that the querySourceFeatures method is not designed to work with VectorSource. It is intended for use with GeoJSON sources, not VectorSource.

Q: Why is querySourceFeatures not working with VectorSource?

A: The reason is that VectorSource is a different type of source than GeoJSON source. VectorSource is used for rendering vector data, while GeoJSON source is used for rendering GeoJSON data. The querySourceFeatures method is designed to work with GeoJSON source, not VectorSource.

Q: Can I use querySourceFeatures with VectorSource?

A: No, you cannot use querySourceFeatures with VectorSource. If you try to use it with VectorSource, it will not work as expected.

Q: What can I use instead of querySourceFeatures with VectorSource?

A: You can use the querySourceFeatures method with a GeoJSON source instead of a VectorSource. This will allow you to query the features within the layer.

Q: How do I use querySourceFeatures with a GeoJSON source?

A: To use querySourceFeatures with a GeoJSON source, you need to create a GeoJSON source and a FillLayer. Then, you can use the querySourceFeatures method to query the features within the layer.

Q: What are the steps to reproduce the issue?

A: To reproduce the issue, follow these steps:

Create a VectorSource and FillLayer as shown in the code snippet above.
Ensure that the data is loading and rendering correctly on the map.
Try calling querySourceFeatures to get the features within the layer.
The function returns an empty array.

Q: What is the expected behavior?

A: The expected behavior is that the querySourceFeatures method should return the features within the layer.

Q: What is the solution to the issue?

A: The solution is to use a GeoJSON source instead of a VectorSource. You can use the querySourceFeatures method with a GeoJSON source to query the features within the layer.

Q: Can I use querySourceFeatures with a VectorSource in a future version of rnmapbox?

A: It is possible that a future version of rnmapbox may support using querySourceFeatures with a VectorSource. However, this is not currently supported and may require significant changes to the underlying library.

Q: How can I get help with this issue?

A: You can get help with this issue by reaching out to the rnmapbox community or by filing an issue on the rnmapbox GitHub repository.