CN107943883A - The Fast rendering method of huge VectorLayer - Google Patents
The Fast rendering method of huge VectorLayer Download PDFInfo
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- CN107943883A CN107943883A CN201711131521.0A CN201711131521A CN107943883A CN 107943883 A CN107943883 A CN 107943883A CN 201711131521 A CN201711131521 A CN 201711131521A CN 107943883 A CN107943883 A CN 107943883A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/904—Browsing; Visualisation therefor
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/005—General purpose rendering architectures
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- Databases & Information Systems (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of Fast rendering method of huge VectorLayer, including obtaining in huge VectorLayer needs the scope of show layers and needs to render the active principle of display；Corresponding effectively figure layer data is filtered out in the storage database of huge VectorLayer；Establish a new virtual figure layer；The effectively figure layer data in the virtual figure layer of foundation is required to be rendered according to display, so as to complete the Fast rendering of huge VectorLayer.The method of the present invention by caching the new virtual figure layer of foundation in memory, and the mode that required target data is individually carried out to rendering display in the virtual figure layer completes the Fast rendering method of huge VectorLayer, and the data source obtained is user's data source of concern and has abandoned other unrelated mass data, therefore the figure layer rendering speed of the method for the present invention will be significantly faster than the figure layer rendering speed of the prior art, to also it accelerate the service speeds such as follow-up refreshing and amplification at the same time, and method is quick and easy, securely and reliably.
Description
Technical field
Present invention relates particularly to a kind of Fast rendering method of huge VectorLayer.
Background technology
With the development and the improvement of people's living standards of national economy technology, basic science has been obtained for widely weight
Depending on also having obtained significant progress.
GIS-Geographic Information System (Geographic Information System, abbreviation GIS) is a kind of spatial information system
System, it is under the support of computer hardware and software system, to related in earth top layer (including atmosphere) space all or in part
Geographic distribution data is acquired, stores, managing, computing, the technological system analyzed, be shown and described.Thus, GIS technology handle
This unique visualization effect of map and geography-analysis function and general database manipulation (such as inquiry and statistical analysis
Deng) integrate.
Visualization technique is the technology for showing, expressing geography information with forms such as numeral, image, forms.In generalized information system
In, VectorLayer is widely used to realize visualization.Spatial data and attribute data are usually stored in computer by GIS software
In file.For ease of processing, huge VectorLayer data can be stored in a database, thus ensure data integrality and
Security.
At present, in generalized information system, some data in some region are inquired about if desired, then the region are amplified and shown.
At this time, in the backstage of generalized information system, automatically all data in the region can be carried out rendering display.But due in generalized information system
The VectorLayer data of magnanimity are stored, therefore during the display in the region, reading, processing that can be there is mass data
Or render process, so as to cause the display in the region more slow, seriously affect the effect of visualization of figure layer.In addition, it is directed to
When the data of generalized information system are inquired about, any once-through operation all can be by all data in query region all from database
Read and rendered；Therefore, the inquiry each time carried out at present for the data of generalized information system, can all undergo " database lookup
Data-reading data-render display " process, even adjacent inquiry operation twice is directed to same partial data.
The content of the invention
It is an object of the invention to provide one kind GIS figure layers can be rapidly completed to render, thus accelerate figure layer show it is huge
The Fast rendering method of big VectorLayer.
The Fast rendering method of this huge VectorLayer provided by the invention, includes the following steps：
S1. obtaining needs the scope of show layers in huge VectorLayer, and needs to render the active principle of display；
S2. according to step S1 obtain need render the active principle of display, in the storage database of huge VectorLayer
In filter out corresponding effectively figure layer data；
S3. a new virtual figure layer is established according to the effectively figure layer data obtained in step S2；
S4. according to display require, step S3 establish virtual figure layer in step S2 obtain effectively figure layer data into
Row renders, so as to complete the Fast rendering of huge VectorLayer.
The Fast rendering method of the huge VectorLayer is used for generalized information system.
The scope of show layers is needed in the huge VectorLayer of acquisition described in step S1, is specially sat according to current reference
Mark system and indication range determine to be currently needed for the scope of show layers.
Corresponding effectively figure layer data is filtered out in the storage database of huge VectorLayer described in step S2, specifically
To filter out corresponding effectively figure layer data in database is stored using spatial database query sentence.
A new virtual figure layer is established according to effectively figure layer data described in step S3, specially in Installed System Memory
A new virtual figure layer is built in caching.
Require to render effectively figure layer data in the virtual figure layer of foundation according to display described in step S4, specifically
To be rendered according to the display of generalized information system requirement, calling system in virtual figure layer to effectively figure layer data.
The Fast rendering method of this huge VectorLayer provided by the invention, by caching the virtual of foundation in memory
Figure layer, and required target data individually in the virtual figure layer render to the mode of display, complete huge vector
The Fast rendering method of figure layer；In addition, it is that data source is obtained in the caching of system that the figure layer of the method for the present invention, which renders, and obtain
The data source taken is system user data source of concern and abandoned the unconcerned mass data source of other users, therefore
The figure layer rendering speed of the method for the present invention will be significantly faster than the figure layer rendering speed of the prior art, while will also accelerate follow-up brush
The service speeds such as new and amplification；And the method for the present invention is quick and easy, securely and reliably.
Brief description of the drawings
Fig. 1 is the method flow diagram of the method for the present invention.
Embodiment
It is the method flow diagram of the method for the present invention as shown in Figure 1：It is provided by the invention this huge by taking generalized information system as an example
The Fast rendering method of VectorLayer, includes the following steps：
S1. determined to need the scope of show layers in huge VectorLayer according to current reference coordinates system and indication range,
And need to render the active principle of display；
S2. according to step S1 obtain need render the active principle of display, in the storage database of huge VectorLayer
In filter out corresponding effectively figure layer data；In the specific implementation, corresponding retrieval or searching algorithm can be used to obtain phase
The effectively figure layer data answered, for example corresponding effective figure layer is filtered out in database is stored using spatial database query sentence
Data；
S3. according to the effectively figure layer data obtained in step S2, a new void is built in the caching in Installed System Memory
Intend figure layer；
S4. step S2 is obtained in the virtual figure layer that step S3 is established according to the display requirement of generalized information system, calling system
Effectively figure layer data rendered, so as to complete the Fast rendering of huge VectorLayer；Later for the operation of above-mentioned data
(for example refresh, amplify etc.) directly data can be obtained from the virtual figure layer of caching.
The render process of the method for the present invention, virtual figure layer, which is postponed, deposits middle acquisition data source, and the data source obtained is
System user part data of concern, and filtered out the number that other users are indifferent to or need not show or render
According to, thus the present invention render process, its processing speed ratio from original database much faster；In addition, the method for the present invention, for
The data of same part, it is only necessary to when for the partial data operate for the first time, read related in storage database
Data source and form virtual figure layer in the buffer；After operating first, if being operated (ratio again for the partial data
Such as refresh operation, amplifieroperation etc.), then system can obtain data from the virtual figure layer in caching automatically and render；Compared to biography
Being obtained from storage database for data are rendered again for system, data and the speed rendered are obtained from the virtual figure layer in caching
Degree, which will be significantly faster than, to be obtained data from storage database and is rendered.Therefore the method for the present invention is not only extracting data first
When can accelerate extraction and the rendering speed of data, for the system operatio in later stage, especially subsequently for the number of the same area
According to operation, the method for the present invention can greatly improve the efficiency and speed rendered.
Claims (6)
1. a kind of Fast rendering method of huge VectorLayer, includes the following steps：
S1. obtaining needs the scope of show layers in huge VectorLayer, and needs to render the active principle of display；
S2. according to step S1 obtain need render the active principle of display, the mistake in the storage database of huge VectorLayer
Filter out corresponding effectively figure layer data；
S3. a new virtual figure layer is established according to the effectively figure layer data obtained in step S2；
S4. required according to display, wash with watercolours is carried out to the effectively figure layer data that step S2 is obtained in the virtual figure layer that step S3 is established
Dye, so as to complete the Fast rendering of huge VectorLayer.
2. the Fast rendering method of huge VectorLayer according to claim 1, it is characterised in that the Fast rendering method
Suitable for generalized information system.
3. the Fast rendering method of huge VectorLayer according to claim 2, it is characterised in that obtaining described in step S1
Taking needs the scope of show layers in huge VectorLayer, specially determined currently according to current reference coordinates system and indication range
Need the scope of show layers.
4. the Fast rendering method of huge VectorLayer according to claim 2, it is characterised in that described in step S2
Corresponding effectively figure layer data is filtered out in the storage database of huge VectorLayer, specially using spatial database query language
Sentence filters out corresponding effectively figure layer data in database is stored.
5. the Fast rendering method of the huge VectorLayer according to one of Claims 1 to 4, it is characterised in that step S3 institutes
That states establishes a new virtual figure layer according to effectively figure layer data, and structure one is new in the caching specially in Installed System Memory
Virtual figure layer.
6. the Fast rendering method of huge VectorLayer according to claim 2, it is characterised in that pressing described in step S4
Require to render effectively figure layer data in the virtual figure layer of foundation according to display, specially will according to the display of generalized information system
Ask, calling system renders effectively figure layer data in virtual figure layer.
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| CN201711131521.0A CN107943883A (en) | 2017-11-15 | 2017-11-15 | The Fast rendering method of huge VectorLayer |
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| CN201711131521.0A CN107943883A (en) | 2017-11-15 | 2017-11-15 | The Fast rendering method of huge VectorLayer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112084284A (en) * | 2020-09-11 | 2020-12-15 | 广州南方智能技术有限公司 | Efficient rendering method for realizing real-time symbolization of data by virtual display list |
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| US20060026170A1 (en) * | 2003-05-20 | 2006-02-02 | Jeremy Kreitler | Mapping method and system |
| CN103136767A (en) * | 2011-11-24 | 2013-06-05 | 北京图盟科技有限公司 | Vector diagram drawing method and device |
| CN103412863A (en) * | 2013-06-05 | 2013-11-27 | 东南大学 | Embedded-device-oriented method for achieving rapid visualization of high-capacity vector map |
| CN104200506A (en) * | 2014-08-04 | 2014-12-10 | 广东威创视讯科技股份有限公司 | Method and device for rendering three-dimensional GIS mass vector data |
| CN104268145A (en) * | 2014-08-21 | 2015-01-07 | 中国科学院遥感与数字地球研究所 | Quick map drawing method of complex vector data |
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2017
- 2017-11-15 CN CN201711131521.0A patent/CN107943883A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060026170A1 (en) * | 2003-05-20 | 2006-02-02 | Jeremy Kreitler | Mapping method and system |
| CN103136767A (en) * | 2011-11-24 | 2013-06-05 | 北京图盟科技有限公司 | Vector diagram drawing method and device |
| CN103412863A (en) * | 2013-06-05 | 2013-11-27 | 东南大学 | Embedded-device-oriented method for achieving rapid visualization of high-capacity vector map |
| CN104200506A (en) * | 2014-08-04 | 2014-12-10 | 广东威创视讯科技股份有限公司 | Method and device for rendering three-dimensional GIS mass vector data |
| CN104268145A (en) * | 2014-08-21 | 2015-01-07 | 中国科学院遥感与数字地球研究所 | Quick map drawing method of complex vector data |
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| CN112084284A (en) * | 2020-09-11 | 2020-12-15 | 广州南方智能技术有限公司 | Efficient rendering method for realizing real-time symbolization of data by virtual display list |
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