Clusters as Pie Charts

This GeoBlazor Pro sample, written in Blazor for .NET developers, demonstrates pie-chart cluster rendering from the ArcGIS Maps SDK for JavaScript exposed through GeoBlazor Pro's PieChartGenerator service together with the FeatureReductionCluster, PieChartRenderer, and PieChartMediaInfo Razor components. The page loads a WebMap of 311 service-call points and aggregates them into clusters; each cluster is drawn as a donut-shaped pie chart whose slices show the proportion of call categories within that cluster, with cluster_count labels in the center. An ExpandWidget in the upper-left corner opens a LegendWidget that explains the slice colors, and a HomeWidget allows the user to reset the view. Clicking a cluster opens a popup containing the cluster total, an embedded pie-chart media element, and a fields list. The sample is intended to demonstrate how to generate rich category-aware cluster visualizations and popups using GeoBlazor Pro's helper services.