A Method of Fast Positioning in Map Data
A map data and map technology, applied in the field of geospatial information, can solve problems such as affecting experience, increasing map service pressure, poor click positioning performance, etc., to avoid inability to locate, narrow the retrieval range, and reduce round-trip time.
Active Publication Date: 2019-02-05
HANGZHOU HIKVISION SYST TECH
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The WMS method can realize dynamic drawing according to the user's request, and then realize the map display of big data, which can bypass the limitation caused by drawing on the browser side. However, each resource point in the WMS method does not have a node dom( Document Object Model (Document Object Model), the performance of click positioning is poor, and it needs to cooperate with map service query, which increases the pressure of map service, making the waiting time process of click positioning affect the experience
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
[0058] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0059] Such as figure 1 As shown, the method for fast positioning in map data of the present invention includes:
[0060] Step 1. When displaying the big data layer of the map, the browser obtains at least one map cache file in the current map field of view from the background of the map data server, and executes the following process on the browser:
[0061] Step 2, generating each of the map cache files as a cache object in the form of key-value pairs;
[0062] Step 3. When the mouse hovers over the displayed map, obtain the current latitude and longitude of the mouse location;
[0063] Step 4, according to the current latitude and longitude of the mouse location, determine the cache object of the mouse location;
[0064] Step 5, converting the...
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 rapid positioning in map data. The method comprises following steps: obtaining multiple map cache files in a current map view field from a map data server background; at a browser end, executing the following process: generating each map cache file into a cache object in a key value mode; when a mouse hovers on a displayed map, obtaining the longitude and the latitude of the location at which the mouse is located, thus determining the cache object of the location at which the mouse is located; converting the longitude and the latitude of each data point in the cache object into a browser coordinate; generating a specific range of each data point in the browser; when the mouse is located in the specific range of a certain data point, brightly displaying the icon and the name of the data point; and adding the click event and the mouse shift out event of the data point. According to the method of the invention, the map data are only positioned at the browser end; the time for the network communication and the database query roundtrip of the foreground and the background is reduced; the user response waiting time is reduced; the user experience is improved; and the pressure of a back end server is reduced.
Description
technical field [0001] The invention relates to the field of geospatial information, in particular to a method for fast positioning in map data. Background technique [0002] At present, map data has been widely used in various applications of the Internet. Representative basic applications such as Google Earth, Baidu Map, Gaode Map, etc., and based on these basic applications, a large number of targeted applications have been developed, such as car and ship navigation applications, geographic information applications for leisure shopping, etc. Wait. In recent years, with the vigorous development of the mobile Internet, map applications based on mobile positioning services have been widely developed, for example, by locating the current location on the map and then searching and pushing nearby services (such as pushing dining locations, shopping locations, etc.) , entertainment location, financial service location, etc.), which brings great convenience to mobile phone user...
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): G06F16/29G06F3/0487
Inventor 蒋文平张乐天林圣拿胡佳妮
Owner HANGZHOU HIKVISION SYST TECH