Mapsui VS NetTopologySuite

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.

NetTopologySuite is popular .NET port of the JTS Topology Suite, though I have not used this. SharpMap is another popular mapping library, though it looks like active development on this may have slowed down. Also, not surprisingly, Bing Maps has quite a few .NET libraries.

We already did a lot, but in order to do more we have to introduce dedicated library/package. In dotnet it is NetTopologySuite. You can achieve a lot from the geospatial perspective with this library, here we just want to get centroids for polygons. Additionally I'm getting rid of unwanted properties, keeping only street, number and city.