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    • 4. 发明申请
    • SYSTEM AND METHOD FOR IDENTIFYING GEOGRAPHICAL AREAS THAT SIGNIFICANTLY OVERLAP A MAP VIEW
    • 用于识别地理区域的系统和方法,其显着地覆盖地图视图
    • WO2007050343A2
    • 2007-05-03
    • PCT/US2006/040337
    • 2006-10-14
    • GOOGLE INC.JOSEPH, JoshyRAMASWAMY, SridharROSE, Mark
    • JOSEPH, JoshyRAMASWAMY, SridharROSE, Mark
    • G08B1/00
    • G09B29/006G06Q30/02G06Q30/0251
    • A system and method for identifying, from a set of geographical areas, a set of target areas that overlap a map view or view port of a map. Target areas are defined as circles having centers and radii, as sets of geographic cells overlaying the areas, or as other polygons of geographic data. Within a view port served or to be served to a user, multiple points are defined and substantially equally spaced within the view port, such that any target area that may significantly overlap the view port (e.g., at least a threshold percentage of the view port) is likely to overlap a minimum number of the points (e.g., one). Some or all target areas are then tested for intersection with some or all of the points, and calculations may be made to determine how much the intersecting areas actually overlap the view port.
    • 用于从一组地理区域中识别与地图的地图视图或观看端口重叠的一组目标区域的系统和方法。 目标区域被定义为具有中心和半径的圆,作为覆盖区域的地理单元集或者地理数据的其他多边形。 在服务于或将被服务给用户的查看端口内,定义了多个点并且在该查看端口内基本上等距地间隔,使得任何可能与查看端口显着重叠的目标区域(例如,查看端口的至少阈值百分比 )可能重叠最少数量的点(例如一个)。 然后测试一些或所有目标区域与一些或全部点的交叉点,并且可以进行计算以确定相交区域实际上与视口重叠多少。