Hit Tests

This GeoBlazor sample, written in Blazor for .NET developers, demonstrates the MapView.HitTest API from the ArcGIS Maps SDK for JavaScript exposed through GeoBlazor's MapView.HitTest method together with FeatureLayerView.Highlight. The page shows a 2D dark-gray basemap centered over the Atlantic with a FeatureLayer of historical hurricane track polylines drawn as semi-transparent thick gray lines (sourced from the Esri Hurricanes sample server). Hovering or clicking a track triggers an OnPointerMove or OnPointerDown handler that calls HitTest with a HitTestOptions filter limited to the hurricane layer's GeoBlazor id; the resulting Graphic's NAME, YEAR, CAT, and WIND_KTS attributes are read in C#. The matching storm is then highlighted in orange (configured via HighlightOptions) by querying the FeatureLayerView for ObjectIds with a where clause on YEAR and NAME and calling Highlight on the returned ids. A small CustomOverlay panel in the upper-right corner of the map displays the hovered storm's name, category, and wind speed in knots. Pointer events are throttled with EventRateLimitInMilliseconds. The sample is intended to demonstrate hit testing and feature highlighting in a Blazor application without writing JavaScript.