Unique Value Renderers

This GeoBlazor sample, written in Blazor for .NET developers, demonstrates the UniqueValueRenderer from the ArcGIS Maps SDK for JavaScript exposed through GeoBlazor's UniqueValueRenderer, UniqueValueInfo, SimpleLineSymbol, and OrderByInfo Razor and C# components. The page shows a 2D basemap centered over the Houston, Texas area at a city-block scale, overlaid with an OpenStreetMap North America highways FeatureLayer. The renderer color-codes each road by its highway attribute, mapping motorways and trunks to thick pink and orange lines, primary roads to yellow, secondary to green, tertiary to blue, residential and unclassified streets to neutral grays, and pedestrian, footway, path, track, busway, raceway, construction, and proposed roads to a variety of dashed earth-tone styles; features are drawn in descending maxspeed order. Below the map a Toggle Legend button shows or hides a LegendWidget in the lower-left corner that lists every road type and its symbol under the heading Route Type. The sample is intended to demonstrate building a rich categorical renderer against a hosted FeatureLayer in a Blazor application without writing JavaScript.