sphericalmercator | Spherical Mercator math in Javascript | Map library

my intention is to display a gps track and the corresponding trackpoints with Mapsui (wpf) on a map. I tried the following code. The result is that the blue linestring is displayed (ok), the red track points (ok) but for any reason you see white track points which are very large and I do not want them to appear at the map and I do not know where the white dots are coming from. Any idea what I am doing wrong?

I am writing a app where you can show your location on the screen. Everything works fine but the map is just one pixel line high. Is there a solution for this?

I'm still fairly new to Visual Studio/Xamarin but I had a simple OpenStreetMap sample running awhile ago for Android that did display a map but that doesn't seem to display map anymore though I haven't changed the code for this sample in awhile as far as I recall. I'm not sure if some Visual Studio/Xamarin or MacOS update might have caused it to not work anymore.

I'm using Visual Studio for Mac community 8.4.4 (build 91) on macOS Mojava 10.14.6 and the following Packages:

• Mapsui 1.4.8
• OsmSharp 6.2.0
• Xamarin.Android.Support.Core.Utils 28.0.0.1
• Xamarin.Android.Support.CustomTabs 28.0.0.1
• Xamarin.Android.Support.Design 28.0.0.1
• Xamarin.Essentials 1.2.0

My MainActivity.cs file contains the following code:

I am trying to set up a web server in Node.js that serves vector tiles to be displayed in a browser using MapboxGL JS. The data for the vector tiles is stored in a PostGIS database.

I receive a geojson file and process it createing a database with next sentence: CREATE TABLE IF NOT EXISTS countries ( table_id SERIAL, properties jsonb not null, geom geometry(GeometryZ,4326), primary key (table_id));

My current set up seems to going in the right direction, as I can see vector tiles being loaded and displayed in the browser. However the rendered result is incorrect (this is a screenshot of a section of my map):

What is rendering incorrectly???

Here is the code:

How do I create a new transformation class compatible with MapSui.Projections.ITransformation interface using ProjNet4GeoAPI that reads the source coordindate system from a prj file.

From Mapsui source code, there is a MinimalTransformation that implements ITransformation interface to convert between SphericalMercator and WGS84.

From Mapsui documentation : The out of the box Mapsui support for projections is limited. The MinimalProjection class only projects between SphericalMercator (EPSG:3857) and WGS84 (EPSG:4326). It is however possible to create your own Transformation. You need to implement the ITransformation interface. Within this implementation you need to use some other projection library. A recommended one is ProjNet4GeoAPI.

I can create a working the transformation class with ProjNet4GeoAPI but it implements GeoAPI.CoordinateSystems.Transformations.ICoordinateTransformation not Mapsui.Projection.ITransformation

I have an array with some coords

I have a NodeJS application using Hapi on version 17 which consumes a web service which returns an image of a map, however, when run the code below I get the following error:

I am using Australian government map data found here: Victoria, Australia locality data, which is provided in the EPSG4326 projection.

When I try to use the data with leaflet, of course, my data is a bit distorted due to the earth's curvature - so my data is not represented properly on the screen because the maps are using a different projection to my data.

I have tried to force the map to use EPSG4326 by setting it in Map options and also in the TileLayer, as shown here:

I am trying to get the corner of a map with a given width, height and zoom level.

Is there any way to calculate it without using GoogleMaps .getBounds()?

I tried sphericalmercator but couldn't get those marker moved into the corners: