The slow part of this problem is based on:
- The “Tiles” obviously fill in one-by-one (a video would show this better)
- When debugging the App I see quite a few “hill climbing, change max number of threads” calls. There are very few of these calls when I use Bing and I also notice a big difference between the different Google PictureFormats i.e. Jpeg has very few of these calls; Png has very many
The erratic part of this problem can be seen in this screenshot:
And here is the relevant code (also note my comments about the results returned by the different PictureFormats):
Note: I am using a GoogleMaps Layer so that I can attach my API key to the web request.