Invention Grant
US09099056B2 Method of labelling a highly curved path on a map rendered on a wireless communications device
有权
在无线通信设备上呈现的地图上标记高度曲线的路径的方法
- Patent Title: Method of labelling a highly curved path on a map rendered on a wireless communications device
- Patent Title (中): 在无线通信设备上呈现的地图上标记高度曲线的路径的方法
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Application No.: US11685912Application Date: 2007-03-14
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Publication No.: US09099056B2Publication Date: 2015-08-04
- Inventor: Gordon Gregory Bowman
- Applicant: Gordon Gregory Bowman
- Applicant Address: US CA Waterloo
- Assignee: BlackBerry Limited
- Current Assignee: BlackBerry Limited
- Current Assignee Address: US CA Waterloo
- Agency: Moffat & Co.
- Main IPC: G09G5/377
- IPC: G09G5/377 ; G06F17/21 ; G06T11/60 ; G06T17/05 ; G06F3/147 ; G01C21/36 ; G06F3/0481 ; G06F17/30 ; G06T19/00 ; G08G1/0968 ; G08G1/0969 ; G09B29/10

Abstract:
In displaying a map on a wireless communications device, a method is provided that resolves labelling of sharp curves. The method entails a determination of whether a curvature of a map element associated with the map feature exceeds a predetermined threshold (e.g. whether a rate of change in slope of a path or the change in angular orientation of each successive character in the label exceeds a threshold that is a function of zoom level. If the curvature exceeds the threshold, the label is rendered on the map in a new map location that avoids the map location where the curvature exceeds the threshold.
Public/Granted literature
- US20070229513A1 METHOD OF LABELLING A HIGHLY CURVED PATH ON A MAP RENDERED ON A WIRELESS COMMUNICATIONS DEVICE Public/Granted day:2007-10-04
Information query
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