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Markers

Markers are notes that are used to show some message on the map. Marker can be set to map using the following two ways:

  • Marker and marker template

  • Adding marker objects to map.

Marker and marker template

The markerSettings.dataSource property has a list of objects that contains the data for annotation. By default, it displays the bound data at the specified latitude and longitude. The markerSettings.template property is used for customizing the template for markers.

Note: The markerSettings property is an array property.

tagHelper
markers.cs
@{
    var data = new[]
    {
            new {latitude= 37.0000, longitude= -120.0000, city= "California" },
            new {latitude= 40.7127, longitude= -74.0059, city= "New York" },
            new {latitude= 42.0000, longitude= -93.0000, city= "Iowa" }
       };
    var marker = new List<MapsMarker>
    {
        new MapsMarker{Visible=true, Template="#template", DataSource=data}
    };

    }

@using Syncfusion.EJ2.Maps;
@using Syncfusion.EJ2;
<div id="control-section">
    <ejs-maps id="maps">
        <e-layers>
            <e-layer shapeData="ViewBag.worldmap" markerSettings="marker"></e-layer>
        </e-layers>
    </ejs-maps>
</div>
<div id="template" style="display: none;">
    <div>
        <div style="background-image:url(http://js.syncfusion.com/demos/web/Images/map/pin.png);margin-left:3px;height:40px;width:25px;margin-top:-15px;">
        </div>
    </div>
</div>
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;

namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {
            ViewBag.worldmap = GetWorldMap();
            List<MarkerData> data = new List<MarkerData>
            {
                 new MarkerData {latitude= 37.0000, longitude= -120.0000, city= "California" },
                 new MarkerData {latitude= 40.7127, longitude= -74.0059, city= "New York" },
                 new MarkerData {latitude= 42.0000, longitude= -93.0000, city= "Iowa" }
            };
            ViewBag.markerData = data;
            return View();
        }
        public object GetWorldMap()
        {
            string allText = System.IO.File.ReadAllText("./wwwroot/scripts/MapsData/WorldMap.js");
            return JsonConvert.DeserializeObject(allText);
        }
        public class MarkerData
        {
            public double latitude { get; set; }
            public double longitude { get; set; }
            public string city { get; set; }
        }
    }
}

Adding marker objects to map

The “n” number of markers can be added to shape layers using the markerSettings.dataSource property. Each dataSource object contains the following list of properties:

label: Text that displays some information about the annotation in text format. latitude: Latitude point that determines the y-axis position of annotation. longitude: Longitude point that determine the x-axis position of annotation.

tagHelper
marker-label.cs
@{
    var data = new[]
    {
            new {latitude= 37.0000, longitude= -120.0000, city= "California" },
            new {latitude= 40.7127, longitude= -74.0059, city= "New York" },
            new {latitude= 42.0000, longitude= -93.0000, city= "Iowa" }
       };
    var marker = new List<MapsMarker>
    {
        new MapsMarker{Visible=true, Template="#template", DataSource=data}
    };

    }

@using Syncfusion.EJ2.Maps;
@using Syncfusion.EJ2;
<div id="control-section">
    <ejs-maps id="maps">
        <e-layers>
            <e-layer shapeData="ViewBag.worldmap" markerSettings="marker"></e-layer>
        </e-layers>
    </ejs-maps>
</div>
<div id="template" style="display: none;">
    <div>
        <div style="margin-left:8px;height:45px;width:120px;margin-top:-23px;">
            <label style="color:black;margin-left:15px;font-weight:normal;">\{\{\:city\}\}</label>
        </div>
    </div>
</div>
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;

namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {
            ViewBag.worldmap = GetWorldMap();
            List<MarkerData> data = new List<MarkerData>
            {
                 new MarkerData {latitude= 37.0000, longitude= -120.0000, city= "California" },
                 new MarkerData {latitude= 40.7127, longitude= -74.0059, city= "New York" },
                 new MarkerData {latitude= 42.0000, longitude= -93.0000, city= "Iowa" }
            };
            ViewBag.markerData = data;
            return View();
        }
        public object GetWorldMap()
        {
            string allText = System.IO.File.ReadAllText("./wwwroot/scripts/MapsData/WorldMap.js");
            return JsonConvert.DeserializeObject(allText);
        }
        public class MarkerData
        {
            public double latitude { get; set; }
            public double longitude { get; set; }
            public string city { get; set; }
        }
    }
}

Enable the Legend for map markers

The legend can be enabled for marker by setting the legendSettings.type to Markers and legend visible to true. Refer to the following code sample to enable the legend for the markers:

tagHelper
legend.cs
@{
    var data = new[]
    {
            new {latitude= 37.0000, longitude= -120.0000, city= "California" },
            new {latitude= 40.7127, longitude= -74.0059, city= "New York" },
            new {latitude= 42.0000, longitude= -93.0000, city= "Iowa" }
    };
    var marker = new List<MapsMarker>
    {
        new MapsMarker{Visible=true, Shape=Syncfusion.EJ2.Maps.MarkerType.Diamond, LegendText="city", DataSource=data}
    };

    }
@using Syncfusion.EJ2.Maps;
@using Syncfusion.EJ2;
<div id="control-section">
    <ejs-maps id="maps">
        <e-maps-legendsettings visible="true" type="Markers"></e-maps-legendsettings>
        <e-layers>
            <e-layer shapeData="ViewBag.worldmap" markerSettings="marker"></e-layer>
        </e-layers>
    </ejs-maps>
</div>
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;
using EJ2_Core_Application.Models;
using Newtonsoft.Json;

namespace EJ2_Core_Application.Controllers
{
    public class HomeController : Controller
    {
        public IActionResult Index()
        {
            ViewBag.worldmap = GetWorldMap();
            List<MarkerData> data = new List<MarkerData>
            {
                 new MarkerData {latitude= 37.0000, longitude= -120.0000, city= "California" },
                 new MarkerData {latitude= 40.7127, longitude= -74.0059, city= "New York" },
                 new MarkerData {latitude= 42.0000, longitude= -93.0000, city= "Iowa" }
            };
            ViewBag.markerData = data;
            return View();
        }
        public object GetWorldMap()
        {
            string allText = System.IO.File.ReadAllText("./wwwroot/scripts/MapsData/WorldMap.js");
            return JsonConvert.DeserializeObject(allText);
        }
        public class MarkerData
        {
            public double latitude { get; set; }
            public double longitude { get; set; }
            public string city { get; set; }
        }
    }
}

Refer to the API for marker feature.

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