What is Scale?

SIS Desktop 9 uses the concept of scale to influence the way your spatial data (graphics), text and symbology are displayed.

Scales are used in these different areas to varying effects:

1. Display Scale
2. Dataset Scale
3. Overlay Scale

To save storage space, all scales are stored as logarithmic values between 0 and 255. It is not possible to specify certain scale numbers precisely in numbers we normally use. For example, the nearest scale to 1250 is 1276. As this is solely the screen magnification scale and has no bearing on the actual scale at which data is printed, these approximations are not important.