AllParcels VS Mapsui

But I think some of this stuff is already handled in Avalonia ecosystem like https://github.com/Mapsui/Mapsui, https://github.com/beto-rodriguez/LiveCharts2 and few others...

Release 4.0.0 · Mapsui/Mapsui (github.com)

You are probably using Xamarin.Maps that use native maps, Google Maps on Android and Apple Maps on iOS, I assume. In Windows there's no native map, so you would need some third party library. I would recommend Mapsui

... private static void MapOnInfo(object? sender, MapInfoEventArgs e) { var calloutStyle = e.MapInfo?.Feature?.Styles.Where(s => s is CalloutStyle).Cast().FirstOrDefault(); if (calloutStyle != null) { calloutlist.Add(calloutStyle); foreach (var callout in calloutlist) { callout.Enabled = false; } calloutStyle.Enabled = !calloutStyle.Enabled; e.MapInfo?.Layer?.DataHasChanged(); // To trigger a refresh of graphics. } if (calloutlist.Count > 1) calloutlist.RemoveRange(0, calloutlist.Count - 1); } private MemoryLayer CreatePointLayer() { return new MemoryLayer { Name = "Points", IsMapInfoLayer = true, Features = new Mapsui.Providers.MemoryProvider(GetPlacesFromList()).Features, Style = SymbolStyles.CreatePinStyle() //<- Reference for custom marker: https://github.com/Mapsui/Mapsui/blob/master/Samples/Mapsui.Samples.Common/Maps/Callouts/CustomCalloutSample.cs#L64 }; } ... private static CalloutStyle CreateCalloutStyle(string? name) { return new CalloutStyle { Title = name, TitleFont = { FontFamily = null, Size = 12, Italic = false, Bold = true }, TitleFontColor = Color.Violet, MaxWidth = 120, RectRadius = 10, ShadowWidth = 4, Enabled = false, SymbolOffset = new Offset(0, SymbolStyle.DefaultHeight * 0.3f) }; }

Looking through their getting started page and their examples on Github (specifically: SingleCalloutSample) I was able to get my list of places to show up on the map and when clicked display certain features.This has led to me only being able to toggle whether the callout is displayed or not. What I am hoping to figure out is how to disable all other callouts once another location is selected, so that only a single callout is displayed at a time.

Json.net, MahApps.Metro, and MapsUI

So I did a quick DDG search and found these two results. Link 1. Link 2. Good luck.