The world data or any data can be at any scale depending to the zoom level. We have a property of the Map CurrentScale where you can get and set the scale if you want your map to be at a particular scale. For example, if you want you r map to be at the scale 1:25,000:
Map1.CurrentScale = 25000
The map will zoom in or zomm out to be at that scale.
Note that the scale is calculated based on the number of pixel per inch, by default it is 96, but you can change the property PixelPerInch of Map if your device is different.