syncfusion_flutter_maps 18.4.46-beta
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A Flutter Maps library for creating beautiful, interactive, and customizable maps from shape files or WMTS services to visualize the geographical area.

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Flutter Maps library #

The Flutter Maps package is a data visualization library for creating beautiful, interactive, and customizable maps from shape files or WMTS services to visualize the geographical area.

Overview #

Create a highly interactive and customizable Flutter Maps that has features set like tile rendering from OpenStreetMaps, Azure Maps API, Bing Maps API, Google Maps Tile API, TomTom, Mapbox, Esri’s ArcGIS, and other tile providers with marker support and shape layer with features like selection, legends, labels, markers, tooltips, bubbles, color mapping, and much more.

Disclaimer: This is a commercial package. To use this package, you need to have either a Syncfusion commercial license or Free Syncfusion Community license. For more details, please check the LICENSE file.

Note: Our packages are now compatible with Flutter for Web. However, this will be in beta until Flutter for web becomes stable.

Table of contents #

Maps features #

Shape layer #

Bubbles - Add information to shapes, such as population density and number of users. Bubbles can be rendered in different colors and sizes based on the data values of that shape.

maps bubble

Markers - Denote a place with built-in symbols or display a custom widget at specific a latitude and longitude on a map.

maps marker

Shape selection - Select a shape in order to highlight that area on a map. You can use the callback for doing any action during shape selection.

maps selection

Legend - Use legends to provide clear information on the data plotted in the map. You can use the legend toggling feature to visualize only the shapes that need to be interpreted. It is also possible to use a bar-style legend with an optional gradient background.

maps legend

Colors - Categorize the shapes on a map by customizing their color based on the underlying value. It is possible to set the shape color for a specific value or for a range of values.

color mapping

Tooltip - Display additional information about the shapes, bubbles, and markers using a customizable tooltip on a map.

maps tooltip

Shape sublayer Add a shape sublayer with GeoJSON data on another shape layer to show more details about a particular region.

Vector layer Add shapes such as polylines, lines, polygons, circles, and arcs as a sublayer in the shape layer.

Zooming and panning - Zoom in shape layer for a closer look at a specific region by pinching, scrolling the mouse wheel or track pad, or using the toolbar on the web. Pan the map to navigate across the regions.

maps zoompan

Tile layer #

Markers - Show markers for the tile layer in the specific latitudes and longitudes. Display additional information about the markers using a customizable tooltip on a map.

tile layer marker

Shape sublayer Add a shape sublayer with GeoJSON data on the tile layer to show more details about a particular region.

tile layer shape sublayer

Vector layer Add shapes such as polylines, lines, polygons, circles, and arcs as a sublayer in the tile layer.

tile layer arc

tile layer polyline

Zooming and panning - Zoom in tile layer for a closer look at a specific region by pinching, scrolling the mouse wheel or track pad, or using the toolbar on the web. Pan the map to navigate across the regions.

Get the demo application #

Explore the full capability of our Flutter widgets on your device by installing our sample browser application from the following app stores. View sample codes in GitHub.

Take a look at the following to learn more about Syncfusion Flutter Maps:

Installation #

Install the latest version from pub.

Flutter map example #

Import the following package.

import 'package:syncfusion_flutter_maps/maps.dart';

Create map #

After importing the package, initialize the maps widget as a child of any widget.

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: Center(
      child: SfMaps(),
    ),
  );
}

Add a GeoJSON file #

The layers in SfMaps contains collection of MapShapeLayer. The actual geographical rendering is done in the each MapShapeLayer. The source property of the MapShapeLayer is of type MapShapeSource. The path of the .json file which contains the GeoJSON data has to be set to the shapeFile property of the MapShapeSource.

The shapeDataField property of the MapShapeSource is used to refer the unique field name in the .json file to identify each shapes. In 'Mapping the data source' section of this document, this shapeDataField will be used to map with respective value returned in primaryValueMapper from the data source.

MapShapeSource _mapSource;

@override
void initState() {
  _mapSource = MapShapeSource.asset(
    'assets/australia.json',
    shapeDataField: 'STATE_NAME',
  );

  super.initState();
}

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: SfMaps(
      layers: [
        MapShapeLayer(
          source: _mapSource,
        ),
      ],
    ),
  );
}

maps basic view

Mapping the data source #

By default, the value specified for the shapeDataField in the GeoJSON file will be used in the elements like data labels, tooltip, and legend for their respective shapes. However, it is possible to keep a data source and customize these elements based on the requirement. As mentioned above, shapeDataField will be used to map with respective value returned in primaryValueMapper from the data source.

List<Model> data;
MapShapeSource _mapSource;

@override
void initState() {
  data = <Model>[
    Model('New South Wales',
     '       New\nSouth Wales'),
    Model('Queensland', 'Queensland'),
    Model('Northern Territory', 'Northern\nTerritory'),
    Model('Victoria', 'Victoria'),
    Model('South Australia', 'South Australia'),
    Model('Western Australia', 'Western Australia'),
    Model('Tasmania', 'Tasmania'),
    Model('Australian Capital Territory', 'ACT')
  ];

  _mapSource = MapShapeSource.asset(
    'assets/australia.json',
    shapeDataField: 'STATE_NAME',
    dataCount: data.length,
    primaryValueMapper: (int index) => data[index].state,
  );

  super.initState();
}

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: SfMaps(
       layers: <MapShapeLayer>[
         MapShapeLayer(
           source: _mapSource,
         ),
       ],
     ),
   );
}

class Model {
  Model(this.state, this.stateCode);

  String state;
  String stateCode;
}

Add maps elements #

Add the basic maps elements such as title, data labels, legend, and tooltip as shown in the below code snippet.

  • Title - You can add a title to the maps to provide a quick information about the data plotted in the map using the title property in the SfMaps.

  • Data label - You can show data labels using the showDataLabels property in the MapShapeLayer and also, it is possible to show data labels only for the particular shapes/or show custom text using the dataLabelMapper property in the MapShapeSource.

  • Legend - You can show legend using the showLegend property in the MapShapeLayer. The icon color of the legend is applied based on the color returned in the shapeColorValueMapper property in the MapShapeSource. It is possible to customize the legend item's color and text using the shapeColorMappers property in the MapShapeSource.

  • Tooltip - You can enable tooltip only for the particular shapes/or show custom text using the shapeTooltipBuilder property in the MapShapeLayer.

List<Model> data;
MapShapeSource _mapSource;

@override
void initState() {
  data = <Model>[
    Model('New South Wales', Color.fromRGBO(255, 215, 0, 1.0),
        '       New\nSouth Wales'),
    Model('Queensland', Color.fromRGBO(72, 209, 204, 1.0), 'Queensland'),
    Model('Northern Territory', Colors.red.withOpacity(0.85),
        'Northern\nTerritory'),
    Model('Victoria', Color.fromRGBO(171, 56, 224, 0.75), 'Victoria'),
    Model('South Australia', Color.fromRGBO(126, 247, 74, 0.75),
        'South Australia'),
    Model('Western Australia', Color.fromRGBO(79, 60, 201, 0.7),
        'Western Australia'),
    Model('Tasmania', Color.fromRGBO(99, 164, 230, 1), 'Tasmania'),
    Model('Australian Capital Territory', Colors.teal, 'ACT')
  ];

  _mapSource = MapShapeSource.asset(
    'assets/australia.json',
    shapeDataField: 'STATE_NAME',
    dataCount: data.length,
    primaryValueMapper: (int index) => data[index].state,
    dataLabelMapper: (int index) => data[index].stateCode,
    shapeColorValueMapper: (int index) => data[index].color,
  );
  super.initState();
}

@override
Widget build(BuildContext context) {
  final ThemeData themeData = Theme.of(context);
  return Scaffold(
    body: Container(
      height: 520,
      child: Center(
        child: SfMaps(
          title: const MapTitle('Australia map'),
          layers: <MapShapeLayer>[
            MapShapeLayer(
              source: _mapSource,
              legend: MapLegend(MapElement.shape),
              showDataLabels: true,
              shapeTooltipBuilder: (BuildContext context, int index) {
                return Padding(
                  padding: const EdgeInsets.all(7),
                  child: Text(data[index].stateCode,
                    style: themeData.textTheme.caption
                      .copyWith(color: themeData.colorScheme.surface)),
                );
              },
              tooltipSettings: MapTooltipSettings(
                  color: Colors.grey[700],
                  strokeColor: Colors.white,
                  strokeWidth: 2),
              strokeColor: Colors.white,
              strokeWidth: 0.5,
              dataLabelSettings: MapDataLabelSettings(
                  textStyle: TextStyle(
                    color: Colors.black,
                    fontWeight: FontWeight.bold,
                    fontSize: themeData.textTheme.caption.fontSize)),
            ),
          ],
        ),
      ),
    ),
  );
}

class Model {
  Model(this.state, this.color, this.stateCode);

  String state;
  Color color;
  String stateCode;
}

The following screenshot illustrates the result of the above code sample.

maps getting started

Support and feedback #

About Syncfusion #

Founded in 2001 and headquartered in Research Triangle Park, N.C., Syncfusion has more than 20,000 customers and more than 1 million users, including large financial institutions, Fortune 500 companies, and global IT consultancies.

Today we provide 1,000+ controls and frameworks for web (ASP.NET Core, ASP.NET MVC, ASP.NET WebForms, JavaScript, Angular, React, Vue, and Blazor), mobile (Xamarin, Flutter, UWP, and JavaScript), and desktop development (WinForms, WPF, and UWP). We provide ready-to-deploy enterprise software for dashboards, reports, data integration, and big data processing. Many customers have saved millions in licensing fees by deploying our software.

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Publisher

syncfusion.com

A Flutter Maps library for creating beautiful, interactive, and customizable maps from shape files or WMTS services to visualize the geographical area.

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License

unknown (LICENSE)

Dependencies

collection, flutter, http, syncfusion_flutter_core

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