definition
strict definition
zoom level
The scale at which an object should ideally appear on a map for optimal viewing.
The geographic zoom level of an object or geographic entity is a number designed to interact with any of various mapping programs, indicating how much of the planetary surface should be shown on the map in order to offer an optimal view of the object or entity.
The value controls the amount of surrounding area visible with the subject. A broad area and a small object can require different viewing scales to be seen usefully.
Latitude and longitude locate a point. Zoom controls the view around that position without changing the point or the object's extent.
Related definitions
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altitude
The height of a point above or below the sea-level reference, expressed in meters with negative values below it. -
boundary
The outline of a region or the footprint of a structure, stored as a polygon of geographic coordinates. -
latitude
The distance of any point north or south of the equator, measured in degrees. -
longitude
The distance of any point east or west of the Greenwich line, measured in degrees. -
pinpoint location
The most central balancing point within a boundary or footprint outline. For buildings, use a 'city' field if coordinates are unknown or unclear.