Polyline Helper - Swift SDK

This example show how to render LineString/Multiline features with styles options like color, width, dash, and outline.

The vector layer helpers take your data and styling options and create the right source + layers on the current map style with minimal code. Helpers normalize sensible defaults like zoom range, outlines, etc. so you can get results quickly.

Polyline Helper - Swift SDK

Basic flow

This example show how to render LineString/Multiline features with color, width, dash, and outline.

import MapTilerSDK

// Assume you have an MTMapView already on screen
let mapView: MTMapView = ...

Task { @MainActor in
    guard let style = mapView.style else { return }

    let helper = MTPolylineLayerHelper(style)

    let lineGeoJSON = """
    {"type":"FeatureCollection","features":[
      {"type":"Feature","geometry":{"type":"LineString","coordinates":[[-122.48,37.80],[-122.40,37.78],[-122.35,37.76]]}},
      {"type":"Feature","geometry":{"type":"LineString","coordinates":[[-122.50,37.74],[-122.43,37.72],[-122.38,37.70]]}}
    ]}
    """

    let options = MTPolylineLayerOptions(
        data: lineGeoJSON,
        lineColor: "#ff7f50",
        lineWidth: 3.0,
        lineOpacity: 0.95,
        lineDashArray: .pattern("__ __ __ __"),
        outline: true,
        outlineColor: "#202020",
        outlineWidth: 1.0,
        outlineOpacity: 0.8
    )

    await helper.addPolyline(options)
}

Learn more

Check the MTPolylineLayerHelper reference to understand how to create and manage point layers.

Review MTPolylineLayerOptions to explore all available configuration options.

Point Helper Clusters - Swift SDK

Point Helper Clusters

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Heatmap Helper - Swift SDK

Heatmap Helper

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Polygon Helper - Swift SDK

Polygon Helper

Examples

This example showcases how to add polygon features on a map using the polygon layer helper

Point Helper - Swift SDK

Point Helper

Examples

This example showcases how to add points features and clustering on a map using the point layer helper