Method for searching interest point along guiding route and navigation system adopting the same
A technology for guiding paths and navigation systems, applied in the field of navigation systems, can solve problems such as low operating efficiency and low effective grid reading hit rate, and achieve the effects of reducing consumption, reducing waiting time, and improving execution efficiency
Active Publication Date: 2011-09-21
SHENZHEN CARELAND TECH
View PDF1 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0027] And if the matching point of interest is not found, the CPU unit will expand the preset range to search, and the more the search range is expanded (such as 1500m), because it always searches with the current driving position as the center point, the larger the search range , the lower the effective read hit rate of the grid
Due to the essential features of the technical solution disclosed in Patent Document 1, even in other general situations, there will be low operating efficiency caused by this reason
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0060] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.
[0061] The main concept of the present invention is as follows: first calculate the retrieval range of the POI according to the guidance path generated by the current navigation system; and then retrieve the POI within the calculated POI retrieval range. After determining the effective interest point retrieval range, the interest point retrieval is carried out, which effectively improves the retrieval hit rate and accelerates the calculation speed.
[0062] Wherein, the point of interest retrieval range includes a left search extension range and a right search extension range; Figure 6 The range covered by len1) in Figure 6 The range covered by len2) in . For the points of interest within the search extension range on the left, the shortest distance between them and the planned route will be less than the preset left search extension dista...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for searching points of interest along a guidance path, and a navigation system using the method; the method for searching points of interest along the guidance path includes the following steps: receiving the property information of the points of interest inputted by a user; calculating the searching scope of the points of interest according to the guidance path generated by the current navigation system; acquiring the points of interest which are searched within the searching scope of the points of interest calculated in step B according to the property information of the points of interest inputted by the user in step A. The method first determines the searching scope of the points of interest to be searched according to the navigation path generated bythe navigation system and then searches the points of interest by reading the points of interest within the searching scope, without searching the areas outside the searching scope of the points of interest. Therefore, the method significantly reduces the consumption of system resources, greatly increases the executive efficiency of peripheral search and reduces the waiting time of the user.
Description
technical field [0001] The invention relates to the technical field of GPS navigation, more specifically, to a method for retrieving points of interest along a guiding path and a navigation system using the method. Background technique [0002] At present, the global positioning system (Global Positioning System, GPS) for vehicles is one of the important application directions of GPS navigation. The GPS antenna of the car GPS navigation system receives the data information transmitted by at least 3 of the 24 GPS satellites around the earth, combined with the electronic map stored in the car navigation terminal, the position coordinates determined by the GPS satellite signal and this match to determine the exact position of the navigation object in the electronic map. [0003] figure 1 Shows the structural composition of the existing navigation system: [0004] Described navigation system comprises: loudspeaker 1, storage device 2, input device 3, sound output device 4, di...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G01C21/26G01C21/34G01C21/36
Inventor 张文星
Owner SHENZHEN CARELAND TECH