CN102147257A - Geographic information search and navigation system based on visual field of users - Google Patents
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Abstract
The invention discloses a geographic information search and navigation system based on a visual field of users, which comprises a data center server, a navigation module and a mobile client side, wherein the data center server is used for storing control programs of the system and extracting GIS (geographic information system) data from internet or self-stored data according to current GPS (global positioning system) coordinates and displaying to the users; the navigation processing module is used for collecting orientation data of the users and displaying the collected data according to the GIS data display of the navigation module; and the data center server comprises a GIS data acquisition module, a GIS data storage and buffer module and a user module, wherein the GIS data acquisition module is used for extracting the GIS data through internet or the GIS data storage and buffer module. The system can directly calculate the scenery related information and navigation information in the visual field of the users through spatial projection and overlay and display on the visual field of an equipment screen, so that the users can obtain the information visually and efficiently.
Description
Technical field
The present invention relates to navigational system, be meant a kind of geographic information retrieval and navigational system especially based on the user visual field.
Background technology
Present navigational system, application product mainly comprise personal navigation equipment, electronic chart and various specialized information website, estimate class website etc. as food and drink.Along with popularizing of internet, various navigator can insert the internet, and upload or download electronic data.
The present electronic product of application navigation, as the products such as mobile phone, computing machine, auto navigation of electronic chart are housed, these products exist problems such as the information integration degree is low, experience inconvenience in various degree.For example, in electronic chart, can only visit geography information, and all not high at other information of the ground spot correlation in the electronic chart (service that provides as the place, sight spot photo etc.) integrated level.In addition, the mobile navigation series products only provides single navigation information, promptly when navigation, show relevant information, can't provide the information that needs when carrying out other main activities immediately according to user's current location, show relevant information, if the user wishes to obtain extend information, need to stop navigation operation separately, or need obtain relevant information by the internet by other equipment.This experience can't satisfy the demand that user's needs in time obtain information.
Existing navigational system can't realize the instant screening of information and present, need the user input query condition just can filter out the information that the user may need, and can not select these information and be shown to the user according to user's present located orientation Automatic sieve.
Summary of the invention
In view of this, the invention reside in provides a kind of geographic information retrieval and navigational system based on the user visual field, to solve the above-mentioned problem that can not select these information according to user's present located orientation Automatic sieve.
For addressing the above problem, the invention provides a kind of geographic information retrieval and navigational system based on the user visual field, system of the present invention automatically the perception user the present position and towards, information data by generalized information system, the information via that interconnected user on the network may be needed screens, integrates, in the real-time visual field that is presented at device screen; Perhaps position, scene information are informed the user with speech form.
System of the present invention mainly is divided into data center server, real-time navigation module and multi-platform client three parts.
Described data center server comprises: GIS data acquisition module, GIS data storage and cache module and line module;
Described GIS data acquisition module, the GIS data acquisition module mainly is responsible for collecting on the internet the geography information raw data that various geographic information datas source provides, and be converted into intrasystem intermediate form, the geographic information data form that final formation can directly directly be used for other parts in the system.
Described GIS data storage and cache module are used for storage and uniform geography information, geographical relevant information, user data;
Described line module has been stored user data important in the system, and the logic such as maintain secrecy of user's management, user profile is provided simultaneously.
Described navigation processing module comprises: user's attitude acquisition module, virtual information laminating module and navigation module;
Described user's attitude acquisition module obtains the residing location of equipment, direction and the angle of pitch by GPS, electronic compass, geomagnetic sensor, makes equipment have perceived position and attitude, i.e. the ability of user's field range.
Described virtual information laminating module, be used for obtaining GIS data in the middle of the user visual field from described data center server, with the building information in the described GIS data, synthetic with current geographic position image information from camera collection, and show according to the data type of described navigation module be provided with, the keyword setting, be shown to the user.
Described navigation module is used to retrieve specific objective information and the navigation indication information is provided.
Describe system of the present invention above in detail, system of the present invention has following advantage:
The user can be real-time acquisition and the information of environmental correclation of living in, do not need or only need seldom input, system just can select the information that the user may need by Automatic sieve;
The mode of user's acquired information is directly efficient, and information is directly superposeed to be presented in user's the visual field, and the object that the user does not need to change concern just can obtain relevant information;
Extensibility is higher, easily the source of extend information, kind.
Use GPS to gather the residing latitude and longitude information of user, as the locator data of obtaining GIS information;
Obtain information datas such as user's current location periphery geography, building, facility by generalized information system;
Go out the active user towards field range by electronic compass and geomagnetic sensor data computation, and according to user's field range screening geographic information data, and obtain relevant information on the internet automatically, comprise geography information growth data, building information, business data, picture concerned and even video etc.;
Scenery relevant information in the user visual field and navigation information are directly calculated by space projection, and stack is presented on the device screen visual field, makes the user can intuitive and efficiently know these information;
If be under the speech pattern, equipment can also be automatically according to voice informing position, the user visual field, build data message within sweep of the eye.
Description of drawings
Fig. 1 is the system construction drawing among the embodiment;
Fig. 2 is the image transitions synoptic diagram among the embodiment;
Fig. 3 is the synoptic diagram of the system architecture layer among the embodiment;
Fig. 4 is the system architecture diagram among the embodiment;
Fig. 5 is the data processing synoptic diagram of the system among the embodiment;
Fig. 6 is the logical diagram of interior each resume module data of server among the embodiment;
Fig. 7 is the logical diagram of interior each resume module data of client among the embodiment.
Embodiment
For clearly demonstrating the scheme among the present invention, provide preferred embodiment below and be described with reference to the accompanying drawings.
Referring to Fig. 1, system of the present invention mainly comprises GIS data acquisition module, GIS data storage and cache module, line module, user's attitude acquisition module, virtual information laminating module and navigation module composition.
These modules are integrated in respectively in data center server, the navigation processing module, also can be partially integrated in the mobile client.For example, GIS data acquisition module, GIS data storage and cache module, line module are integrated in the data center server, user's attitude acquisition module, virtual information laminating module and navigation module are integrated in the navigation processing module.Describe the function of each module below in detail.
1, GIS data acquisition module
The GIS data acquisition module mainly is responsible for collecting on the internet the geography information raw data that various geographic information datas source provides, and be converted into intrasystem intermediate form, through putting, merge sequence of operations such as redundant landmark point, conversion terrestrial coordinates and terrestrial coordinate in order, the geographic information data form that final formation can directly directly be used for other parts in the system.
The GIS data acquisition module also is responsible for grasping on the internet geographical related data simultaneously, for example comprise pictorial information that obtains from Panoramio and the video information of obtaining from video website, module is responsible for these data acquisitions and is sorted out, be buffered in GIS data storage and the cache module the geographical related data that final formation can be retrieved according to user's current location.
2, GIS data storage and cache module
GIS data storage and cache module mainly provide the storage system of significant datas such as the geography information in the system, geographical relevant information, user data, and according to the statistics of the actual use of system, have designed caching system efficiently targetedly.
For the characteristics of the intermediate form that uses with the characteristics of geography information and native system are complementary, when the database structure of design and realization GIS data storage part, integrality and accuracy that lot of data base relation/key comes the compulsory maintenance data have been used, and widely applied interim buffer memory in database level persistence buffer memory and the internal memory to improve the performance of entire system, also expansion and the maintenance for system provides the good data basis.
Because the source of geographical related data is more, the data item quantity of various geographical related data, meaning also have nothing in common with each other, therefore, in system, designed different storage organizations for different geographical related data (as video, picture) etc., database storing related data structures, crucial metadata have comprehensively been used, and use the real geographical related data entity of disk file system storage, be convenient to the expansion and the maintenance of storage space.
3, line module
Line module has been stored user data important in the system, and the logic such as maintain secrecy of user's management, user profile is provided simultaneously.And the data of system, be used to control the software that other each module is moved.For the ease of system's expansion and secondary development after this, so most of function of line module all additionally provides Web Service as second kind of application means.
In native system, user's the real-time and system data server interaction of present position information meeting, and owing to provide according to task intelligence in customer location and the schedule route of user is made the position intelligent function of suggestion, the importance of line module data carried by data amount, data encryption etc. all is the factor that needs consideration.
4, user's attitude acquisition module
Position and attitude sensing module obtain the residing position of equipment, direction and the angle of pitch to determine the buildings in forward view, by bluetooth and client communication, make client have the ability of perceived position and attitude.
Position and attitude awareness apparatus are formed by combining by GPS module, electrical compass module.Each device height is integrated, communicates by letter with client is unified by bluetooth or serial ports.According to the platform difference of carrying client, can select the original equipment of part client (as GPS) to reduce equipment cost.
5, virtual information stack display module
The data of client assembling position and attitude awareness apparatus (electronic compass in user's attitude acquisition module) are submitted to server, ask the information in forward view, show through the image stack in forward view of calculating back and camera collection.Along with moving of camera, the information that real-time update shows reaches the information of virtual world and the purpose of true environment seamless link.
Each building node on user's screen, all superposeing has shown relevant geography information, comprises building name, photo, brief introduction etc., and lists around this node and build other relevant coordinate indexing speech therewith for the further retrieving information of user.This directly mode of stack virtual information in the user visual field has improved efficient and accuracy that information shows greatly.
6, navigation module
In navigation module, native system provides surrounding buildings thing systematic searching, and the user can select classification (as amusement, food, body-building etc.) to inquire about.If the classification of listing can not be satisfied user's demand, then can carry out key search, the result of retrieval sorts by distance, in the tabulation on screen next door, mark, point to nearest destination in the mode of arrow in scene, along with the change of position, the position of arrow also can be upgraded at any time.
In the intelligent function of the position of navigation module, the task of interpolation not only has time attribute, also has space and task type attribute.Set and need withdraw the money in certain time period as the user, in the time period, the position intelligent object can remind the user to withdraw the money through near the time cash dispenser the user.The task that the position intelligent object is set can be finished to guarantee task in a plurality of clients of user synchronously.
By data center server, navigation processing module and mobile client among Fig. 1, can realize real-time navigation, obtain current position coordinates by the GPS module in the position and attitude acquisition module, go out the active user towards field range by the data computation in the position and attitude acquisition module again according to electronic compass and geomagnetic sensor, and the geographic information data that screening is stored according to user's field range, and obtain relevant information on the internet automatically, comprise geography information growth data, building information, business data, picture concerned and even video etc.
By data center server, navigation processing module and mobile client, the data processing that describes in detail between each module below by embodiment concerns.
View data after virtual information stack display module will superpose is shown to the user in real time, these view data, come from GIS data acquisition module, GIS data storage and cache module, GIS data storage and cache module are used to preserve the building information on every side under each gps coordinate point, the GIS data acquisition module is used for the data under the internet search Current GPS coordinate points, and offers virtual information stack display module.Virtual information stack display module also can connect camera or camera, gathers real scene image.
Navigation module is used for according to user's setting or search key, extracts relevant geographic position data from GIS data acquisition module, GIS data storage and cache module, and control virtual information stack display module demonstration corresponding geographical position data.
The user is after starting navigational system, by the position and attitude acquisition module obtain current coordinate position and current position towards after, by the virtual information laminating module with geography information real-time with customer location towards visual field information superimposed, as the user towards various building informations, building information on every side, user's the visual field can be simulated by camera, by three-dimension varying the most basic in the computer graphics, be geometric transformation, projective transformation, cutting conversion, the viewport transform, the geographic position projection in the three dimensions can be become the planimetric coordinates in user's eye.
In real world, all objects all have three-dimensional feature, but computing machine itself can only be handled numeral, show the figure of two dimension, and unique tie that three-dimensional body and 2-D data are linked together is exactly a coordinate.
In order to make the three-dimensional body digitizing that is shown, in the space at the object place that is shown, define a coordinate system.The long measure of this coordinate system and the direction of coordinate axis will be fit to being shown the description of object, and this coordinate system is called world coordinate system.World coordinate system is changeless all the time.
Computing machine will show on graphic alphanumeric display that this will define a two-dimentional rectangular coordinate system on the graphic alphanumeric display screen after digitized demonstration object has been done the processing processing, and this coordinate system is called screen coordinate system.The direction of this coordinate system coordinate axis is got the edge that becomes to be parallel to screen usually, and true origin is taken at the lower left corner, and long measure is often got into a pixel.
For three-dimensional coordinate being converted to the screen coordinate of two dimension, virtual information stack display module needs following several conversion:
Viewpoint change
Viewpoint change has been determined the viewpoint position and the direction of object in the scene, the shooting process of analogy camera, and it similarly is to have placed a camera in scene, allows camera aim at the object that will take.Really save time, camera (being viewpoint) is positioned at the initial point (the camera inceptive direction all points to the negative axle of Z) of coordinate system, and the default position of its jljl phantom type is consistent, and obviously, if do not carry out viewpoint change, camera and object overlap.
It is identical carrying out the order of viewpoint change and the order of execution model conversion, and with the camera shot object time, we can keep the position of object motionless, and camera is moved apart object, and this just is equivalent to viewpoint change; In addition, we also can keep the fixed position of camera, and object is moved apart camera, and this just is equivalent to model conversion.Like this, during the three-dimensional portion programming realizes, just be equivalent to the camera that turns clockwise to be rotated counterclockwise object.Therefore, we must be the consideration that combines of viewpoint conversion and model conversion, and these two kinds of conversions are considered it is skimble-skamble separately.
Usually, the viewpoint conversion operations sent before the model conversion operation, so that model conversion is had an effect to object earlier.The summit of object is through moving to desirable position after the model conversion in the scene, and then scene carried out operation such as viewpoint location.Model conversion and viewpoint are changed common component model what comes into a driver's matrix.
Model transferring
Model transferring carries out in world coordinate system.When default, therefore the center that is centrally located in coordinate system of object model in native system, does not need landmark point is carried out model transferring.
Projective transformation
Referring to Fig. 2, after the conversion through the model what comes into a driver's, object in the scene has been placed on the desirable position, but because display can only show three-dimensional body with two-dimensional image, therefore will reduce dimension (projective transformation is similar to the camera lens of selecting camera) by projection, just realize so-called usually " near big and far smaller " effect.
In fact, the purpose of projective transformation defines a what comes into a driver's body exactly, makes the external unnecessary part of what comes into a driver's crop, and finally enters the interior relative section of just what comes into a driver's body of image.
We have selected the perspective projection mode for use, meet people's mental habit, and promptly big from the near object of viewpoint, the object far away from viewpoint is little, is disappearance as far as limit, becomes vanishing point.Its what comes into a driver's body is similar to a top and the bottom all is carried out the rib vertebra that cut, just terrace with edge.This projection is generally used for animation, visual simulation and other many aspects with authenticity reflection.
In native system, user's real time position and visual field information are placed in the virtual three dimensions, simultaneously, landmark point around the user is also placed this space, like this, just can access these landmark point and whether can " be seen " and arrive by user's visual field institute, and can the two-dimensional coordinate of descried landmark point in the visual field.Like this, just virtual information can be projected in the user visual field.
After the landmark point in the user visual field is determined, the two-dimensional coordinate of landmark point in the user visual field be determined, these information and user's visual field stack is just shown relatively easily to get up, only need to use the first-class video acquisition instrument of shooting, will be coaxial when forward view with the user, with the image collection of angle, then draw the stack demonstration that the relevant information of landmark point can be finished geography information and the user visual field at the correct position of the video that collects.
By these virtual informations and user's the visual field is superimposed, say narrowly, the user can be efficiently real-time obtain geography information, expanded the scope that human vision is observed technically, the virtual information on the internet is included within the observable scope in the human visual field in the lump.
Describe the data processing relation of each module above in detail, describe the project organization of system of the present invention below in detail, referring to Fig. 3, Fig. 3 is the design diagram of cache layer, in the system architecture design drawing, embodied quantity, position and the importance of the metadata cache layer in the system.Because in native system, mass data is by Network Transmission, the height real-time of simultaneity factor also requires data to have certain continuity, therefore, sets up the metadata cache layer just to seem particularly important in each level of system.
In native system, the metadata cache layer mainly contains two kinds of forms:
The buffer memory of data base persistenceization
At data storage layer, geographic information data has used the data base persistence buffer memory, after being about to the geographic information data that data server collects and merging, be converted to intermediate form, structure is buffered in the database.Because it is bigger original geographic information data to be converted to the operand of intermediate data, the time cycle that the while geographic information data changes is also relatively grown (for the pace of change of data in EMS memory), therefore, this part data persistence is buffered in the database, can reduce the time cost of data server conversion, retrieval geographic information data greatly, accelerate the operational efficiency of system greatly.
Interim buffer memory in the internal memory
At Business Logic and contact bed, the more data of coming from the data server transmission are arranged, these data have certain unchangeability (the geography information yet relative fixed at short notice in moving in a big way, the user's peripheral extent generally can not take place the short time customer location) at short notice, therefore, these data are buffered in the internal memory temporarily.
Owing in internal memory, obtain tens thousand of/one that the needed time of data only is Network Transmission, therefore add the metadata cache layer in these positions, can enhanced system the real-time of operation, shorten system response time, thereby reach the purpose that improves user's experience.
Fig. 4 is a configuration diagram of the present invention, comprises the process of each layered data processing, and Fig. 5 is the flow process of data processing in the navigation procedure.Fig. 6, Fig. 7 are respectively the synoptic diagram of server and client side's deal with data.
Describe system of the present invention above in detail, system of the present invention has following advantage:
The user can be real-time acquisition and the information of environmental correclation of living in, do not need or only need seldom input, system just can select the information that the user may need by Automatic sieve;
The mode of user's acquired information is directly efficient, and information is directly superposeed to be presented in user's the visual field, and the object that the user does not need to change concern just can obtain relevant information;
Extensibility is higher, easily the source of extend information, kind.
Use GPS to gather the residing latitude and longitude information of user, as the locator data of obtaining GIS information;
Obtain information datas such as user's current location periphery geography, building, facility by generalized information system;
Go out the active user towards field range by electronic compass and geomagnetic sensor data computation, and according to user's field range screening geographic information data, and obtain relevant information on the internet automatically, comprise geography information growth data, building information, business data, picture concerned and even video etc.;
Scenery relevant information in the user visual field and navigation information are directly calculated by space projection, and stack is presented on the device screen visual field, makes the user can intuitive and efficiently know these information;
If be under the speech pattern, equipment can also be automatically according to voice informing position, the user visual field, build data message within sweep of the eye.
For the navigational system of being set forth among each embodiment of the present invention, within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. geographic information retrieval and navigational system based on a user visual field, it is characterized in that, system of the present invention can pass through GPS chip, electronic compass and the automatic perception user of geomagnetic sensor the present position and towards, information data by generalized information system, the information via that interconnected user on the network is needed screens, integrates, in the real-time visual field that is presented at device screen; Perhaps position, scene information are informed the user with speech form;
System of the present invention mainly is divided into data center server, real-time navigation module and multi-platform client three parts; Wherein data center server is responsible for carrying out data collection and storage; Implement navigation module and be responsible for obtaining customer location, attitude information, the computing of the line data of going forward side by side output; Multi-platform client is used for carrying out information interaction with the user.
2. navigational system according to claim 1 is characterized in that, described data center server comprises: GIS data acquisition module, GIS data storage and cache module and line module;
Described GIS data acquisition module, the GIS data acquisition module mainly is responsible for collecting on the internet the geography information raw data that various geographic information datas source provides, and be converted into intrasystem intermediate form, the geographic information data form that final formation can directly directly be used for other parts in the system;
Described GIS data storage and cache module are used for storage and uniform geography information, geographical relevant information, user data;
Described line module has been stored user data important in the system, and user's the maintaining secrecy of management, user profile is provided simultaneously.
3. navigational system according to claim 1 is characterized in that, described navigation processing module comprises: user's attitude acquisition module, virtual information laminating module and navigation module;
Described user's attitude acquisition module obtains the residing location of equipment, direction and the angle of pitch by GPS, electronic compass, geomagnetic sensor, makes equipment have perceived position and attitude, i.e. the ability of user's field range;
Described virtual information laminating module, be used for obtaining GIS data in the middle of the user visual field from described data center server, with the building information in the described GIS data, synthetic with current geographic position image information from camera collection, and show according to the data type of described navigation module be provided with, the keyword setting, be shown to the user;
Described navigation module is used to retrieve specific objective information and the navigation indication information is provided.
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