Tile Providers don´t show content in map control Access Form

MapWinGIS
1

Hello everyone:

Years ago, I have been using the MapwinGIS ocx component, in MSAccess forms, with VBA code.
I have been able to load layers, and show them on a provider (OpenStreetMap, GoogleMaps, Googlertain, etc)

For some time, when assigning to my map object the usual code, the content in the viewer is not shown, under the loaded shape.

Map0.TileProvider = tkTileProvider.OpenStreetMap

I can no longer freely load these providers?

Thank you

2

Hello @amarichal.

  1. Have you updated to a recent version of MapWinGIS?
  2. Are you getting an error message or any indication why it cannot be loaded?

Thank you.
Jerry.

3

Thanks, Jerry.

  1. Yes, I updated to a recents versions of MapWinGIS, 5.0 and 5.1

  2. I haven’t received any messages during execution

I thought I could use tile providers in the new versions.

Thanks again
amarichal

4

The OSM tiles are still freely available.
You need at least these lines to get the tiles:

AxMap.Projection = tkMapProjection.PROJECTION_GOOGLE_MERCATOR;
AxMap.TileProvider = tkTileProvider.OpenStreetMap;
AxMap.KnownExtents = tkKnownExtents.keUSA;

Of course KnownExtents can be changed to your needs.
You can also set Tiles.LogFilename and see if you have any traffic or errors.

Here are some more explanations: Tiles class reference

5

Thanks again.

Sorry Paul, I can’t visualize with the lines of code provided OSM tiles, the map control appears empty.

Only OSM tiles are still freely available, none from Google ?

Won’t other tile providers work in previous versions of MapWinGIS activex?

6

Bing is also available, but you need an API key.
Google doesn’t allow access anymore for years now. You could of course create a custom provider and add the urls of Google to see if they still work.

And can you post parts of the tiles logging file?

7

I’ve recently had to update, and I seemed to detect a similar problem.
similar thread: Tile Server for open street map - #3 by pmeems

using the standard code

AxMap.Projection = tkMapProjection.PROJECTION_GOOGLE_MERCATOR;
AxMap.TileProvider = tkTileProvider.OpenStreetMap;
AxMap.KnownExtents = tkKnownExtents.keUSA;

Seems to work, if not VERY slowly. I did have some problems when I’m changing the projection.