How to adjust zoom levels in latest beta

[G_Vandenboom]

Hello,

For a long time I’ve been using this code to adjust the default zoomlevels (with zoomlevelfactor = 8) to be able to zoom in further then normal.
In the latest beta versions this is not working anymore and it will also be obsolete in the future.

    Me.ZoomLevelSet.ZoomLevel01.Scale = Me.ZoomLevelSet.ZoomLevel01.Scale
    Me.ZoomLevelSet.ZoomLevel02.Scale = Me.ZoomLevelSet.ZoomLevel02.Scale / ZoomlevelFactor
    Me.ZoomLevelSet.ZoomLevel03.Scale = Me.ZoomLevelSet.ZoomLevel03.Scale / ZoomlevelFactor
    Me.ZoomLevelSet.ZoomLevel19.Scale = Me.ZoomLevelSet.ZoomLevel19.Scale / ZoomlevelFactor
    Me.ZoomLevelSet.ZoomLevel20.Scale = Me.ZoomLevelSet.ZoomLevel20.Scale / ZoomlevelFactor

How can I get my default zoom levels back?

The suggestion mapview.ZoomScales = zoomLevelSet.GetScales() is not working and will also be obsolete soon.

Max zoomlevels in latest version (left) and current version (right).

Kind regards,
Guido van den Boom

[Ben]

Hi Guido,

I tested with the latest beta (ThinkGeo.Core Beta140) and the following code works fine:

var ZoomlevelFactor = 8;
MapView.ZoomLevelSet.ZoomLevel01.Scale = MapView.ZoomLevelSet.ZoomLevel01.Scale;
MapView.ZoomLevelSet.ZoomLevel02.Scale = MapView.ZoomLevelSet.ZoomLevel02.Scale / ZoomlevelFactor;
MapView.ZoomLevelSet.ZoomLevel03.Scale = MapView.ZoomLevelSet.ZoomLevel03.Scale / ZoomlevelFactor;
MapView.ZoomLevelSet.ZoomLevel19.Scale = MapView.ZoomLevelSet.ZoomLevel19.Scale / ZoomlevelFactor;
MapView.ZoomLevelSet.ZoomLevel20.Scale = MapView.ZoomLevelSet.ZoomLevel20.Scale / ZoomlevelFactor;

MapView.ZoomScales = MapView.ZoomLevelSet.GetScales();

Also I don’t see MapView.ZoomScales is marked Obsolete, can you get the latest beta and have another try?

Thanks,
Ben

[G_Vandenboom]

Hi Ben,

This picture is what I was refering too.

‘Public Overloads Property Zoomlevelset as Zoomlevelset’ is obsolete and will be remove after v14.6.
As English is not my native language, I have no idea what this means.
To me it seems that this code for changing the default zoom scales will not work after v14.6.

Regards,
Guido van den Boom

[Ben]

Hi Guido,

I see. It means MapView.ZoomLevelSet is obsoleted, but you can use MapView.ZoomScales to set up the custom zooms. Here is some quick demo code:

        var zoomLevelSet = new SphericalMercatorZoomLevelSet();
        var scale0 = zoomLevelSet.ZoomLevel01.Scale;
        var zoomlevelfactor = 8;

        MapView.ZoomScales = new Collection<double>();
        for (int i = 1; i < 20; i++)
        {
            MapView.ZoomScales.Add(MapView.ZoomScales[^1] / zoomlevelfactor);  
        }

ZoomScales is a collection of scale(double) to specify the custom map zooms. It’s lightweight and easier to set up.

And just FYI, v14.3 is now available on Nuget.

Thanks,
Ben