CN107564098A - A kind of Fast rendering method of big Local Area Network three-dimensional noise map - Google Patents
A kind of Fast rendering method of big Local Area Network three-dimensional noise map Download PDFInfo
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- CN107564098A CN107564098A CN201710711904.9A CN201710711904A CN107564098A CN 107564098 A CN107564098 A CN 107564098A CN 201710711904 A CN201710711904 A CN 201710711904A CN 107564098 A CN107564098 A CN 107564098A
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Abstract
The present invention proposes a kind of Fast rendering method of big Local Area Network three-dimensional noise map.The map in big region is divided into multiple zonule maps by TMS segmentation rule, and the basic data in big region is stored into the data block unit corresponding to zonule according to geographical position.Before rendering, using tile map service function, the basic data that scope loads corresponding tiling area is browsed according to the map.When rendering, according to different noise figure sizes, color value is assigned for each noise Rx point, and the color inside rectangular mesh is filled using the method for interpolation, other grids on same surface are drawn according to same color applying drawing mode.The quick reading and inquiry that are advantageous to data in a manner of map tile form stores basic data that the method uses.The method for the on-demand loading map tile basic data that the method uses can reduce data volume and workload of the color applying drawing within the same time, can quick, color applying drawing Network Three-dimensional Noise map glibly.
Description
Technical field
The present invention relates to Network Three-dimensional Noise map color applying drawing technical field, more particularly, to a kind of big regional network
The Fast rendering method of network three-dimensional noise map.
Background technology
Three-dimensional noise map can not only show the noise profile situation on ground, and be capable of making an uproar for exhibition building thing surface
Sound distribution situation.When the operation such as user zooms in and out to the three-dimensional noise map on browser, translates, browser needs
Again to render map picture, therefore, on a web browser, the three-dimensional noise map in big region render displaying be one frequently simultaneously
The process redrawn in real time.In addition, color applying drawing forward direction data server requests and loading area in all data with
It is irrational for color applying drawing, not only data volume is big, the load time is long, efficiency is low, and can take too many computer
Memory headroom, while very big pressure is also caused to data server.
Current network three-dimensional noise map realizes the Web Publishing of three-dimensional noise map by third party's browser plug-in.Have
The tile Noise map that researcher cuts Cadna/A by Silverlight browser plug-ins generation is published in network, is made
Noise map can be checked by web browser.But this mode requires to pacify in the computer or browser of user
Extra software is filled, also has certain performance requirement to the software and hardware of computer, without versatility.
As can be seen here, rendering for the Network Three-dimensional Noise map in big region shows that method still is so general in the presence of lacking now
Property, it is impossible to glibly, in real time color applying drawing the problem of.
The content of the invention
It is an object of the invention to overcome the existing issue of Network Three-dimensional Noise map color applying drawing, there is provided it is a kind of in real time,
Quickly, the rendering intent of the big Local Area Network three-dimensional noise map with versatility.
In order to realize above-mentioned goal of the invention, the technical solution adopted by the present invention is as follows：
A kind of Fast rendering method of big Local Area Network three-dimensional noise map, comprises the following steps：
A. the basic data in big region is stored in the form of map tile.Advised according to the segmentation of map tile service (TMS)
Then, big area map is divided into multiple zonule map tiles of specific level, and each region is numbered, then
Basic data (road data, building data and noise data) is respectively stored into each zonule map according to geographical position
In data block unit corresponding to tile, each data block unit is named mark with tile number.
Further, each map tile region of segmentation generation is entered using the tile number coordinate-system of network map
Line number.
Further, it is straight by every to form the linear section of road section as unit in terms of road data storage
Part of path is distributed in each map tile region passed through to it；In terms of building data storage, building angle point is utilized
The geometric center of gravity of profile determines the map tile region belonging to building, and building distributed to affiliated map tile region
In；In terms of noise data storage, the data storage in the form of noise Rx lattice array, each node includes its coordinate in array
Attribute and noise value attribute, and surface where it is divided into the net using noise Rx point as node by noise Rx lattice array
Lattice.
Further, the mesh spacing on building noise calculation surface is arranged to 4m.
Further, in the data stored with tile map service mechanism, the size of every map tile corresponds to tile
18th level of Map Services standard.
B. the basic data of scope loading respective regions is browsed according to the map.Work as forward sight using the acquisition provided in Cesium
The function of tile number set in the range of domain, and combine with the basis of tile map service mechanism data storage, rendering
Cheng Zhong, only load current map browse in the range of each tile corresponding to data.
Further, obtain the function of the tile number set in current FOV, be utilize based on WebGL and
The tile map service (TMS) that Javascript browser three-dimensional map engine Cesium is provided, according to the current visual field
Scope and scaling level, the automatic tile number set calculated in the visual field, load map base map and basic data, realize with browsing
The conversion in region and on-demand loading data and draw Noise map.
C. the color inside rectangular mesh is filled using the method for interpolation according to the noise figure of noise Rx point.Root
According to different noise figure sizes, color value is assigned for each noise Rx point, and according to the color value of grid angle point, pass through
WebGL carries out linear interpolation to the color inside each rectangular mesh using the function that video card hardware accelerates and rendered, with this wash with watercolours
Dye draws Network Three-dimensional Noise map.
Compared with prior art, the present invention has advantages below：
The present invention proposes a kind of Fast rendering method of big Local Area Network three-dimensional noise map.This method is with map tile
Form stores the basic data in big region.Based on the rule of tile map service, big area map is divided into specific level
Zonule map, and each region is numbered, basic data is stored to using tiling area as storage according to geographical position
In the data block of unit, when needing to obtain data, then with numeral index into corresponding data block.The data storage of this method
Form can improve the speed of digital independent and inquiry, to improve the efficiency rendered.For the map in big region, this method passes through
Color applying drawing regional extent is controlled, using being carried in the browser three-dimensional map engine Cesium based on WebGL and Javascript
The function of tile number set in the current FOV of acquisition of confession, and combine with tile map service mechanism data storage
Basis, only load current map browse in the range of each tile corresponding to data, can so reduce in same time wash with watercolours
The data volume and workload drawn are contaminated, to reach the effect of Fast rendering.It is each in addition, according to different noise figure sizes
Noise Rx point assigns color value, and according to the color value of grid angle point, the function of being accelerated by WebGL using video card hardware
Linear interpolation is carried out to the color inside each rectangular mesh and is rendered.Browser three-dimensional map engine Cesium is based entirely on
WebGL's and Javascript, browser platform supports WebGL technologies, almost can be in institute using the Cesium systems developed
Have in operating system and run, therefore, the method can be applied to the browser platform of support WebGL technologies used, have very strong lead to
The property used.Meanwhile WebGL to grid render and is greatly improved Network Three-dimensional Noise map using the function that video card hardware accelerates
Color applying drawing efficiency.
The present invention is a kind of Fast rendering method of big Local Area Network three-dimensional noise map, and it is three-dimensional to solve big Local Area Network
Noise map lacks versatility in terms of color applying drawing, it is impossible to it is quick, glibly color applying drawing the problems such as.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the Fast rendering method of big Local Area Network three-dimensional noise map.
In the way of road and building data are split and stored by tiling area by Fig. 2.
Fig. 3 is distributed color applying drawing flow for gridding surface noise in the present invention, and (a) noise figure is converted into color value, (b)
Single grid is rendered, (c) renders single surface.
Embodiment
Accompanying drawing being given for example only property explanation, it is impossible to be interpreted as the limitation to this patent；It is attached in order to more preferably illustrate the present embodiment
Scheme some parts to have omission, zoom in or out, do not represent the size of actual product；
To those skilled in the art, it is to be appreciated that some known features and its explanation, which may be omitted, in accompanying drawing
's.
As shown in figure 1, a kind of Fast rendering method of big Local Area Network three-dimensional noise map proposed by the present invention, main bag
Include 3 parts：The basic data in big region is stored in the form of map tile, scope loading respective area is browsed according to current map
The basic data in domain, according to the noise figure of noise Rx point the color inside rectangular mesh is filled out using the method for interpolation
Fill.Whole network three-dimensional noise map color applying drawing flow is as follows：
Step 1：Before rendering, by the basic data (road data, building data and noise data) in big region with
Tile map service mechanism is stored in data storage server.In terms of the storage of road data, to form road section
Linear section is unit, and every linear section is distributed in each tiling area passed through to it.In depositing for building data
In terms of storage, the tile number that is transformed into according to the geometric center of gravity longitude and latitude of every building angle point profile, assign it to pair
In the tiling area answered.In terms of noise data storage, the data storage in the form of noise Rx lattice array, each tie in array
Point includes its coordinate attributes and noise value attribute, and surface where it is divided into noise Rx point by noise Rx lattice array
For the grid of node.As shown in Fig. 2 road R1 is made up of three linear sections ab, bc, cd, when carrying out road data storage,
Each linear section can be separately dispensed into following tiling area：
Ab linear sections：Tile (1,0), Tile (2,0)
Bc linear sections：Tile (2,0), Tile (3,0)
Cd linear sections：Tile(3,0)
When carrying out building data storage, building A, C are assigned in tiling area (1,2), and building B, D are divided
It is fitted in tiling area (2,2), building E is assigned in tiling area (3,1).
As shown in Fig. 3 (a).Rectangle abcd is made up of noise Rx point a, b, c, d, forms render surfaces ABCD noise Rx
A rectangular mesh in lattice array, wherein, the mesh spacing on building noise calculation surface is arranged to 4m.
Step 2：It is different according to the performance of hardware device, the noise profile scope or current for allowing to draw simultaneously is set
Map view scope.
Step 3：The acquisition provided in browser three-dimensional map engine Cesium based on WebGL and Javascript is provided
The function of tile number set in present scope, initiate to ask to data storage server, according to current field range and
Level is scaled, calculates the tile number set in field range automatically, loads the basis of the map tile included in present scope
Data.
Step 4：The color applying drawing of Noise map is carried out using the noise calculation surface of gridding.Wherein, gridding
Noise calculation surface render process it is as follows：
(1) as shown in Fig. 3 (b), according to different noise figure sizes, color value, a, b, d are assigned for each noise Rx point
The noise figure of three noise Rx points is 80dB, is endowed red, the noise figure of c noise Rx point is 50dB, is endowed yellow；
(2) according to the coordinate attributes of noise Rx point, rectangle abcd is drawn in three-dimensional scenic using WebGL technologies；
(3) rectangle abcd inside is filled using the function that video card hardware accelerates by WebGL technologies as shown in Fig. 3 (c)
It color value, can be rendered inside it according to four angle points a, b, c, d color value automatic interpolation, complete rectangular mesh abcd wash with watercolours
Dye；
(4) rendering for same other grids of surface is completed in the same fashion.
Obviously, the above embodiment of the present invention is only intended to clearly illustrate example of the present invention, and is not pair
The restriction of embodiments of the present invention.For those of ordinary skill in the field, may be used also on the basis of the above description
To make other various forms of changes or variation.There is no need and unable to be exhaustive to all real-time modes.It is all this
All any modification, equivalent and improvement made within the spirit and principle of invention etc., should be included in the claims in the present invention
Protection domain within.
Claims (10)
- A kind of 1. Fast rendering method of big Local Area Network three-dimensional noise map, it is characterised in that methods described includes following step Suddenly：A, the basic data in big region is stored in the form of map tile；B, the basic data of scope loading respective regions is browsed according to current map；C, the color inside rectangular mesh is filled using the method for interpolation according to the noise figure of noise Rx point, with this wash with watercolours Dye draws Network Three-dimensional Noise map.
- 2. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 1, it is characterised in that：It is described It is regular according to the segmentation of map tile service (TMS) in step a, big area map is divided into multiple cells of specific level Domain map tile, and each region is numbered, then basic data is respectively stored into according to geographical position each small In data block unit corresponding to area map tile, each data block unit is named mark with tile number；Wherein base Plinth data include road data, building data and noise data.
- 3. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 2, it is characterised in that：Use Each map tile region of segmentation generation is numbered the tile number coordinate-system of network map.
- 4. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 2, it is characterised in that：For Road data stores, and is to form the linear section of road section as unit, every linear section is distributed to it and passed through Each map tile region in.
- 5. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 2, it is characterised in that：For Building data storage, it is to determine the map tile region belonging to building using the geometric center of gravity of building angle point profile, Building is distributed into affiliated map tile region.
- 6. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 2, it is characterised in that：For Noise data stores, and is the data storage in the form of noise Rx lattice array, in array each node include its coordinate attributes and Surface where it is divided into the grid using noise Rx point as node by noise value attribute, noise Rx lattice array.
- 7. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 6, it is characterised in that：It will build The mesh spacing for building thing noise calculation surface is arranged to 4m；In the data stored with tile map service mechanism, every map The size of tile corresponds to the 18th level of tile map service standard.
- 8. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 1, it is characterised in that：It is described In step b, using the tile number set in the current FOV of acquisition provided in Cesium, and combine and taken with tile map The basis of business mechanism data storage, in render process, only load current map browse in the range of each tile corresponding to Basic data.
- 9. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 8, it is characterised in that：Utilize The tile map service (TMS) that browser three-dimensional map engine Cesium based on WebGL and Javascript is provided, according to Current field range and scaling level, the automatic tile number set calculated in the visual field, loads map base map and basic data, Realize with the conversion of browsing area and on-demand loading data and drafting Noise map.
- 10. the Fast rendering method of big Local Area Network three-dimensional noise map according to claim 1, it is characterised in that：Institute State in step c, the color inside rectangular mesh is filled using the method for interpolation according to the noise figure of noise Rx point, is According to different noise figure sizes, color value is assigned for each noise Rx point, and according to the color value of grid angle point, pass through WebGL carries out linear interpolation to the color inside each rectangular mesh using the function that video card hardware accelerates and rendered.
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| CN110516023A (en) * | 2019-08-26 | 2019-11-29 | 广东石油化工学院 | A kind of Noise map method for drafting based on mobile awareness |
| CN110570506A (en) * | 2019-09-11 | 2019-12-13 | 珠海金山网络游戏科技有限公司 | Map resource management method and device, computing equipment and storage medium |
| CN110580273A (en) * | 2019-09-11 | 2019-12-17 | 四川易利数字城市科技有限公司 | map GIS data processing and storing method and device and readable storage medium |
| CN110990510A (en) * | 2019-11-28 | 2020-04-10 | 北京世纪高通科技有限公司 | Three-dimensional map generation method, terminal and server |
| CN111586360A (en) * | 2020-05-14 | 2020-08-25 | 佳都新太科技股份有限公司 | Unmanned aerial vehicle projection method, device, equipment and storage medium |
| CN111640181A (en) * | 2020-05-14 | 2020-09-08 | 佳都新太科技股份有限公司 | Interactive video projection method, device, equipment and storage medium |
| CN113449162A (en) * | 2021-06-28 | 2021-09-28 | 广州极飞科技股份有限公司 | Point cloud data display system, method and device, storage medium and electronic equipment |
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| CN116383451A (en) * | 2023-06-06 | 2023-07-04 | 北京赛目科技股份有限公司 | Map segmentation method and device, electronic equipment and storage medium |
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| CN109741448A (en) * | 2018-12-12 | 2019-05-10 | 浙江科澜信息技术有限公司 | Method, apparatus and equipment based on dem data drawing three-dimensional relief model |
| CN110516023A (en) * | 2019-08-26 | 2019-11-29 | 广东石油化工学院 | A kind of Noise map method for drafting based on mobile awareness |
| CN110516023B (en) * | 2019-08-26 | 2023-04-25 | 广东石油化工学院 | Noise map drawing method based on mobile perception |
| CN110570506A (en) * | 2019-09-11 | 2019-12-13 | 珠海金山网络游戏科技有限公司 | Map resource management method and device, computing equipment and storage medium |
| CN110580273A (en) * | 2019-09-11 | 2019-12-17 | 四川易利数字城市科技有限公司 | map GIS data processing and storing method and device and readable storage medium |
| CN110570506B (en) * | 2019-09-11 | 2023-09-22 | 珠海金山数字网络科技有限公司 | Map resource management method, device, computing equipment and storage medium |
| CN110990510A (en) * | 2019-11-28 | 2020-04-10 | 北京世纪高通科技有限公司 | Three-dimensional map generation method, terminal and server |
| CN110990510B (en) * | 2019-11-28 | 2024-04-09 | 北京世纪高通科技有限公司 | Three-dimensional map generation method, terminal and server |
| CN111640181A (en) * | 2020-05-14 | 2020-09-08 | 佳都新太科技股份有限公司 | Interactive video projection method, device, equipment and storage medium |
| WO2021227359A1 (en) * | 2020-05-14 | 2021-11-18 | 佳都新太科技股份有限公司 | Unmanned aerial vehicle-based projection method and apparatus, device, and storage medium |
| CN111586360B (en) * | 2020-05-14 | 2021-09-10 | 佳都科技集团股份有限公司 | Unmanned aerial vehicle projection method, device, equipment and storage medium |
| CN111586360A (en) * | 2020-05-14 | 2020-08-25 | 佳都新太科技股份有限公司 | Unmanned aerial vehicle projection method, device, equipment and storage medium |
| WO2022105641A1 (en) * | 2020-11-20 | 2022-05-27 | 华为云计算技术有限公司 | Rendering method, device and system |
| CN113449162A (en) * | 2021-06-28 | 2021-09-28 | 广州极飞科技股份有限公司 | Point cloud data display system, method and device, storage medium and electronic equipment |
| CN116383451B (en) * | 2023-06-06 | 2023-08-18 | 北京赛目科技股份有限公司 | Map segmentation method and device, electronic equipment and storage medium |
| CN116383451A (en) * | 2023-06-06 | 2023-07-04 | 北京赛目科技股份有限公司 | Map segmentation method and device, electronic equipment and storage medium |
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