Map Image Layers

This GeoBlazor sample, written in Blazor for .NET developers, demonstrates the MapImageLayer from the ArcGIS Maps SDK for JavaScript via GeoBlazor's MapImageLayer and Sublayer Razor components. Unlike feature layers, MapImageLayer requests dynamically rendered images from the server rather than vector features. The page shows a 3D scene with a dark gray basemap. Above the scene is a radio group with five options: a static City Pool Permits map, a USA-services layer with toggleable Highways/Cities/Railroads/States sublayers (with click-to-toggle chips below the map), a population-filtered cities sublayer driven by a SliderWidget that updates the layer's DefinitionExpression as the user drags, sublayers with custom SimpleRenderers for state/highway/city symbols, and sublayers with custom Labels including state-name and city-name text symbols at different scale ranges. As the user changes the radio selection the corresponding MapImageLayer configuration is rendered, and the view zooms to the layer's extent or to a Chicago-area view for the labels demo. The sample is intended to demonstrate MapImageLayer sublayer toggling, custom rendering, and dynamic filtering in a Blazor application without writing JavaScript.