Windows 10 Universal App custom map - geolocation

Question

I want to create an app for airplane navigation. Since for pilots the Bing maps are useless I need to create my own map a texture of an aeronautical map.
I couldn't find any clue how to start on this. Is there an SDK for Bing maps where I can create my own texture/overlay?
Do I need to start from rock bottom and create a picture and change its position so the relevant part is in the visible area of the device?
I need the following features:
Show current position on the map.
Add some custom POIs via coordinates

Answer 1

After quite some research I figured it out myself.
Here is most of the code needed if you have the same scenario
Uri format:
"https://webserver/tiles/{zoomlevel}/{x}/{y}.png";
private void InitMap()
{
_gps = new Geolocator();
pointBuffer = cologne;
image = RandomAccessStreamReference.CreateFromUri(new Uri("ms-appx:///Assets/images/airplane.png"));
MyMap.Style = MapStyle.None;
//Setup Icao Layer
_icaoTileSource = new MapTileSource();
var _tileLayer = new HttpMapTileDataSource();
_tileLayer.UriFormatString = IcaoUri;
_icaoTileSource.DataSource = _tileLayer;
MyMap.TileSources.Add(_icaoTileSource);
//Setup VFR Layer
_vfrTileSource = new MapTileSource();
var _vfrtileLayer = new HttpMapTileDataSource();
_vfrtileLayer.UriFormatString = VfrUri;
_vfrTileSource.DataSource = _vfrtileLayer;
//Setup Low Level Layer
_lowlvlTileSource = new MapTileSource();
var _lowlvltileLayer = new HttpMapTileDataSource();
_lowlvltileLayer.UriFormatString = LowLvlUri;
_lowlvlTileSource.DataSource = _lowlvltileLayer;
airplane = new MapIcon()
{
Title = "My Position",
Image = image,
Visible = true,
Location = cologne,
NormalizedAnchorPoint = new Point(0.5, 0.5)
};
_tileLayer.AllowCaching = true;
MyMap.MapElements.Add(airplane);
systemSetCenter = true;
MyMap.Center = cologne;
MyMap.ZoomLevel = 10;
_vm.ZoomLevel = MyMap.ZoomLevel;
MyMap.ZoomLevelChanged += (s, e) =>
{
if(s.ZoomLevel > maxZoomLevel)
{
s.ZoomLevel = maxZoomLevel;
}
_vm.ZoomLevel = s.ZoomLevel;
};
}