Image Format OZF
If the GIF / JPG increasingly less clear, the Format OZF may initially confuse. But do not worry there is not: it invented by the developers Ozi Format for storing cards and work with them.
One major difference OZF from the standard is that for a single card contains several identical IMAGES at different scales, from 25% and below, so changing the scale of the map in Ozi is much faster and the result is better quality.
Also, OZF card stores individual rectangular pieces and can work with these pieces separately. Download maps of OZF proisfodit much faster, which is important in the case of navigation of old and infirm laptops.
only drawback OZF Formata is that the file size is obtained in a few times more than the GIF or JPG - it charges for flexibility.