A region contains a bounding box () that describes an area of interest
defined by geographic coordinates and altitudes. In addition, a Region contains
an LOD (level of detail) extent () that defines a validity range of the associated
Region in terms of projected screen size. A Region is said to be "active" when the
bounding box is within the user's view and the LOD requirements are met. Objects
associated with a Region are drawn only when the Region is active. When the
is onRegion, the Link or Icon is loaded only when the Region is active. See the
"Topics in KML" page on Regions for more details. In a Container or NetworkLink
hierarchy, this calculation uses the Region that is the closest ancestor in the
hierarchy.
Features and geometry associated with a Region are drawn only when the Region is
active. See .
(required) Measurement in screen pixels that represents the minimum
limit of the visibility range for a given Region. Google Earth calculates the size
of the Region when projected onto screen space. Then it computes the square root
of the Region's area (if, for example, the Region is square and the viewpoint is
directly above the Region, and the Region is not tilted, this measurement is equal
to the width of the projected Region). If this measurement falls within the limits
defined by and (and if the is in view),
the Region is active. If this limit is not reached, the associated geometry is considered
to be too far from the user's viewpoint to be drawn. Measurement
in screen pixels that represents the maximum limit of the visibility range for a
given Region. A value of −1, the default, indicates "active to infinite size."
Distance over which the geometry fades, from fully opaque to fully transparent.
This ramp value, expressed in screen pixels, is applied at the minimum end of the
LOD (visibility) limits. Distance over which the geometry fades,
from fully transparent to fully opaque. This ramp value, expressed in screen pixels,
is applied at the maximum end of the LOD (visibility) limits.
Creates a new instance of LatLonAltBox and set it to latLonAltBox.
This method is a short version for:
LatLonAltBox latLonAltBox = new LatLonAltBox();
this.setLatLonAltBox(latLonAltBox);