GPS tracks, for example, can use the absolute altitude mode to display paths created while flying or diving. This altitude mode is useful in situations where the altitude value is known precisely. Negative values are accepted, to place features below sea level. Portions of a feature can extend underground, as in the example below. In this way, features can be placed underground, and will not be visible. The absolute altitude mode measures altitude relative to sea level, regardless of the actual elevation of the terrain beneath the feature.
Note that the gx-prefixed extension namespace may not be supported by all geo-browsers. Then, substitute for when using either clampToSeaFloor or relativeToSeaFloor. To use them, you must first add the correct namespace URI to the opening element in your KML file: Sea floor-related altitude modes are contained within a set of extensions to the KML standard, using the gx prefix. It can also be ignored ( clampToGround and clampToSeaFloor) SeaFloor altitude modes and the KML extension namespace
#EARTH POINT MEASURE POLYGON HOW TO#
elements also can contain altitude.Īny altitude value should be accompanied by an element, which tells Google Earth how to read the altitude value.
Many KML features can contain an element or coordinate, which specifies a distance above the ground level, sea level, or sea floor for that particular feature.
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