HerePlatform.NET

.NET libraries for the HERE Platform APIs — targeting .NET 8, 9, and 10.

Unofficial project. HerePlatform.NET is an independent community library. It is not affiliated with, endorsed by, or supported by HERE Global B.V. See Trademarks and disclaimer.

Package	Description
HerePlatform.NET.Blazor	Blazor components for HERE Maps JS API (includes RestClient)
HerePlatform.NET.RestClient	Standalone REST client for HERE APIs — usable without Blazor

Prerequisites

• A HERE Developer account and API key
• .NET 8.0, 9.0, or 10.0

Installation

# Blazor app (includes map components + all REST services)
dotnet add package HerePlatform.NET.Blazor

# Non-Blazor app (REST services only — console, API, Worker, etc.)
dotnet add package HerePlatform.NET.RestClient

Quick Start — Blazor

Register services and add a map:

// Program.cs
builder.Services.AddHerePlatformBlazor("YOUR_HERE_API_KEY");

<AdvancedHereMap Id="myMap" Height="400px" Options="@(new MapOptions { Zoom = 12 })">
    <MarkerComponent Lat="52.52" Lng="13.405">
        <b>Hello Berlin!</b>
    </MarkerComponent>
</AdvancedHereMap>

All required JavaScript is loaded automatically — no manual <script> tag needed. Blazor Server and WebAssembly are both supported.

Quick Start — REST Client

Use HERE APIs from any .NET app without Blazor:

// Program.cs
builder.Services.AddHereRestServices(options =>
{
    options.ApiKey = "YOUR_HERE_API_KEY";
});

// Inject and use any service
public class MyService(IRoutingService routing, IGeocodingService geocoding)
{
    public async Task Example()
    {
        var route = await routing.CalculateRouteAsync(new RoutingRequest
        {
            Origin = new LatLngLiteral(52.52, 13.405),
            Destination = new LatLngLiteral(48.8566, 2.3522),
            TransportMode = TransportMode.Car
        });

        var address = await geocoding.GeocodeAsync("Brandenburger Tor, Berlin");
    }
}

REST Services

All services support dependency injection and are available in both the Blazor and standalone RestClient packages.

Service	Methods	HERE API
IRoutingService	CalculateRouteAsync	Routing v8
IIsolineService	CalculateIsolineAsync	Isoline Routing v8
IMatrixRoutingService	CalculateMatrixAsync	Matrix Routing v8
IGeocodingService	GeocodeAsync, ReverseGeocodeAsync	Geocoding & Search v7
IAutosuggestService	SuggestAsync, AutocompleteAsync	Geocoding & Search v7
IPlacesService	DiscoverAsync, BrowseAsync, LookupAsync	Geocoding & Search v7
ITrafficService	GetTrafficIncidentsAsync, GetTrafficFlowAsync	Traffic v7
IPublicTransitService	GetDeparturesAsync, SearchStationsAsync	Public Transit v8
IWaypointSequenceService	OptimizeSequenceAsync	Waypoint Sequence v8
IGeofencingService	CheckPositionAsync	Client-side
IWeatherService	GetWeatherAsync	Destination Weather v3
IRouteMatchingService	MatchRouteAsync	Route Matching v8
IEvChargePointsService	SearchStationsAsync	EV Charge Points v3
IMapImageService	GetImageAsync	Map Image v3
IIntermodalRoutingService	CalculateRouteAsync	Intermodal Routing v8
ITourPlanningService	SolveAsync	Tour Planning v3

Blazor Components

Component	Description
HereMap / AdvancedHereMap	Map with two-way binding (center, zoom, tilt, heading) and rich events
MarkerComponent / DomMarkerComponent	Standard and HTML markers with drag, click, InfoBubbles
PolylineComponent, PolygonComponent, CircleComponent, RectComponent	Shapes — all draggable and styleable
RouteComponent	Declarative route rendering on the map
MarkerClusterComponent	Marker clustering with custom SVG templates
HeatmapComponent	Heatmap visualization
InfoBubbleComponent	Standalone InfoBubbles
GroupComponent	Group map objects, toggle visibility
GeoJsonReaderComponent / KmlReaderComponent	Load GeoJSON/KML data
CustomTileLayerComponent / ImageOverlayComponent	Custom tile layers and image overlays
HereAutosuggest	Address search with keyboard navigation and customizable design
DistanceMeasurementComponent, OverviewMapComponent, ZoomRectangleComponent	UI controls
ContextMenuComponent	Right-click context menu

Utilities

Available in both packages via HerePlatform.Core:

• WktParser — parse WKT geometry strings (Point, LineString, Polygon, MultiPoint)
• GeoJsonExporter — export coordinates to GeoJSON features and collections
• FlexiblePolyline — decode/encode HERE's flexible polyline format

Documentation

Full documentation with interactive demos and API reference: emuuu.github.io/HerePlatform.NET

Trademarks and disclaimer

HerePlatform.NET is an independent, community-maintained open-source project. It is not an official HERE product and is not affiliated with, authorized by, endorsed by, or sponsored by HERE Global B.V.

"HERE", "HERE Technologies", "HERE Maps" and the HERE logo are trademarks or registered trademarks of HERE Global B.V. All other product names, logos and brands are the property of their respective owners. They are used in this project, in its documentation and in its package names solely to identify the third-party APIs this library communicates with; such descriptive use implies no endorsement, sponsorship or business relationship.

The library is provided under the MIT license, as-is and without warranty of any kind. It carries no support agreement or service level of any kind from HERE, and using it does not change your obligations under HERE's own terms of service — you still need your own HERE account and API key. Questions about the APIs themselves belong to their respective providers; questions about this library belong in its issue tracker.

If you hold rights to any of the marks named above and object to their use here, please open an issue and it will be addressed.

License

MIT