公开(公告)号：US07400972B2

公开(公告)日：2008-07-15

申请号：US10867545

申请日：2004-06-14

申请人： Frank J. Kozak

发明人： Frank J. Kozak

IPC分类号： G21C21/32 ,  G08G1/123

CPC分类号： B61L29/246 ,  G01C21/3461

摘要： A navigation system provides information about railroad crossing locations. A geographic database used by the navigation system includes data that indicate whether an at-grade railroad crossing is located along a road segment. Using this information, a route calculation function in the navigation system calculates a route to a destination that avoids road segments that have at-grade railroad crossings. In this way, the delays associated with waiting for a train to cross a road are avoided.

摘要翻译： 导航系统提供有关铁路穿越位置的信息。 导航系统使用的地理数据库包括指示一级铁路道口是否位于道路段上的数据。 使用该信息，导航系统中的路线计算功能计算到目的地的路线，以避免具有铁路交叉路口的路段。 这样就避免了等待火车过马路的延误。

公开(公告)号：US07231295B2

公开(公告)日：2007-06-12

申请号：US10819743

申请日：2004-04-07

申请人： Terence D. Pickett ,  Frederick W. Nelson ,  Larry L. Hendrickson

发明人： Terence D. Pickett ,  Frederick W. Nelson ,  Larry L. Hendrickson

IPC分类号： G21C21/32 ,  G08G1/133 ,  G01S5/14

CPC分类号： G01C15/00

摘要： The present invention is directed to a method for acquiring elevation data for an area. The method includes using a GPS receiver to map ground elevations while driving back and forth over an area and periodically recording position, elevation, and time. Then, at least one track is made across the parallel tracks so that the cross track intersects the parallel tracks. The data obtained is processed and elevation data from the cross track is used to adjust elevation data for the parallel tracks, compensating for elevation drift in measurements recorded by the GPS receiver. The adjusted data for the entire area is processed using the method of the present invention to obtain an elevation map for the area.

摘要翻译： 本发明涉及一种用于获取区域的高程数据的方法。 该方法包括使用GPS接收器来在地面上来回移动并周期性地记录位置，高程和时间时映射地面高度。 然后，跨越平行的轨道形成至少一个轨道，使得十字轨道与平行轨道相交。 所获得的数据被处理，并且使用来自交叉轨道的高程数据来调整平行轨道的高程数据，补偿由GPS接收机记录的测量中的高程漂移。 使用本发明的方法处理整个区域的调整数据，以获得该区域的高程图。