CN103500115A - Three-dimensional GIS data rapid loading method and device - Google Patents
Three-dimensional GIS data rapid loading method and device Download PDFInfo
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Abstract
The invention discloses a three-dimensional GIS data rapid loading method and device. The three-dimensional GIS data rapid loading method and device can improve the loading speed of three-dimensional GIS data from the local to the memory, and effectively solve the problem of stopping of a screen. The three-dimensional GIS data rapid loading method comprises the steps that the three-dimensional GIS data are divided into a plurality of three-dimensional GIS data units according to a preset splitting rule, a thread is distributed for each three-dimensional GIS data unit, and each three-dimensional GIS data unit is loaded to a memory block through the respective thread, and all the three-dimensional GIS data units are integrated into a complete three-dimensional scene. Due to the fact that the original three-dimensional GIS data are divided into the three-dimensional GIS data units and the threads load the three-dimensional GIS data units respectively, loading speed is improved compared with the speed of the single thread loading in the prior art. Finally, due to the fact that all the three-dimensional GIS data units are integrated into the complete three-dimensional scene, the problem of stopping of the screen is solved.
Description
Technical field
The present invention relates to technical field of data processing, relate in particular to a kind of three-dimension GIS data rapid loading method and device.
Background technology
Geographic Information System (GIS, Geographic Information System), to take geospatial database as basis, under the support of computer software and hardware, use the theory of systems engineering and information science, scientific management and analysis-by-synthesis have the geodata of space intension, so that the technological system of the information needed such as management, decision-making to be provided.Briefly, GIS is overall treatment and a kind of technological system of analyzing geographical spatial data, is to survey and draw to be measured as basis, usings database as the data source of data storing and use, the instant technology of global space analysis that the computer programming of take is platform.
General, server is loaded into the GIS data internal memory from this locality, then transfers above-mentioned GIS data to client, such as being deployed into to spell on wall system, is shown.
But above-mentioned loading procedure is loaded into whole GIS data in internal memory by single-threaded often, loading velocity is very slow, causes transferring data and is affected to spelling the step shown on wall system.Produce card screen problem.
Summary of the invention
The embodiment of the present invention provides a kind of three-dimension GIS data rapid loading method and device, can improve the loading velocity of three-dimension GIS data from this locality to the internal memory, effectively solves card screen problem.
A kind of three-dimension GIS data rapid loading method that the embodiment of the present invention provides comprises:
According to preset fractionation rule, by the three-dimension GIS Data Division, be several three-dimension GIS data cells;
For each three-dimension GIS data cell is distributed a thread, the thread by each three-dimension GIS data cell by separately is loaded into memory block;
Whole three-dimension GIS data cells are integrated into to complete three-dimensional scenic.
Optionally,
The three-dimension GIS data comprise image data or three-dimensional modeling data.
Optionally,
According to preset fractionation rule, the three-dimension GIS Data Division is comprised for several three-dimension GIS data cells:
Build image pyramid by image data, obtain tile data;
Tile data is carried out to zone and divide, obtain the tile data unit.
Optionally,
According to preset fractionation rule, the three-dimension GIS Data Division is comprised for several three-dimension GIS data cells:
Three-dimensional modeling data is classified, obtained geometric data and/or data texturing;
Geometric data is used to the first decomposition method, obtain geometry data elements, data texturing is used to the second decomposition method, obtain texture data unit.
Optionally,
For each three-dimension GIS data cell is distributed a thread, the thread by each three-dimension GIS data cell by separately is loaded into memory block and comprises:
For each tile data unit distributes a thread, use the first loading method, the thread by each tile piece by separately is loaded into memory block.
Optionally,
For each three-dimension GIS data cell is distributed a thread, the thread by each three-dimension GIS data cell by separately is loaded into memory block and comprises:
For each how much piece distributes a thread, use the second loading method, thread by each geometry data elements by separately is loaded into memory block, for each texture block is distributed a thread, use the 3rd loading method, the thread by each texture data unit by separately is loaded into memory block.
Optionally,
For each three-dimension GIS data cell is distributed a thread, after the thread by each three-dimension GIS data cell by separately is loaded into the memory block step, before being integrated into to complete three-dimensional scenic step, whole three-dimension GIS data cells also comprise:
Set up the buffer zone queue in memory block;
The three-dimension GIS data cell is stored in the buffer zone queue;
The three-dimension GIS data cell is managed.
The embodiment of the present invention also provides a kind of three-dimension GIS data rapid loading device, specifically comprises:
Split module, for being several three-dimension GIS data cells according to preset fractionation rule by the three-dimension GIS Data Division;
Distribution module, be used to each three-dimension GIS data cell to distribute a thread;
Load-on module, for by each three-dimension GIS data cell, the thread by separately is loaded into memory block;
Integrate module, for being integrated into complete three-dimensional scenic by whole three-dimension GIS data cells.
Optionally,
Set up module, for set up the buffer zone queue at memory block;
Storage module, for being stored into the buffer zone queue by the three-dimension GIS data cell;
Administration module, manage for the three-dimension GIS data cell.
As can be seen from the above technical solutions, the embodiment of the present invention has the following advantages:
The inventive method comprises: according to preset fractionation rule, by the three-dimension GIS Data Division, be several three-dimension GIS data cells; For each three-dimension GIS data cell is distributed a thread, the thread by each three-dimension GIS data cell by separately is loaded into memory block; Whole three-dimension GIS data cells are integrated into to complete three-dimensional scenic.Owing to being several three-dimension GIS data cells by former three-dimension GIS Data Division, load respectively the three-dimension GIS data cell by a plurality of threads, load to compare with the prior art single thread and improved loading velocity.Finally integrating whole three-dimension GIS data cells is complete three-dimensional scenic, thereby has solved card screen problem.
The accompanying drawing explanation
The first embodiment process flow diagram that Fig. 1 is a kind of three-dimension GIS data rapid loading method in the embodiment of the present invention;
The second embodiment process flow diagram that Fig. 2 is a kind of three-dimension GIS data rapid loading method in the embodiment of the present invention;
Fig. 3 is a kind of three-dimension GIS data rapid loading device example structure schematic diagram in the embodiment of the present invention.
Embodiment
The full name of OSG is that Open Scene Graph is used the OpenGL technological development, is a set of application programming interfaces (API) based on the C++ platform, and it allows the programmer can create more fast, easily high-performance, cross-platform interactive graphics program.It provides the various senior characteristics of playing up as middleware (middleware) for application software, IO, and space structure is organized function; And more the OpenGL hardware abstraction layer (HAL) of low level has been realized the driving that bottom hardware shows.
The embodiment of the present invention provides a kind of three-dimension GIS data rapid loading method and device, can improve the loading velocity of three-dimension GIS data from this locality to the memory block, effectively solves card screen problem.The embodiment of the present invention is loaded as example with the three-dimension GIS data and launches explanation, but the content loaded is not limited to the three-dimension GIS data, can also be other data types.
Refer to Fig. 1, a kind of three-dimension GIS data rapid loading embodiment of the method that the embodiment of the present invention provides comprises:
101, according to preset fractionation rule, by the three-dimension GIS Data Division, be several three-dimension GIS data cells;
In the present embodiment, when server starts to carry out three-dimension GIS data loading tasks, at first by this three-dimension GIS Data Division, be several three-dimension GIS data cells, the three-dimension GIS data can comprise numerous types of data, different data types can adapt to different fractionation rules, split resulting three-dimension GIS data cell and can be understood as the different pieces of information group, and memory block is as being loaded into the front data type conversion of internal memory step.At this, concrete three-dimension GIS data, three-dimension GIS data cell and preset fractionation rule are not limited, particular content will launch explanation in subsequent embodiment.
102, be that each three-dimension GIS data cell is distributed a thread, the thread by each three-dimension GIS data cell by separately is loaded into memory block;
In the present embodiment, use OSG to support multithreading to load, for the multithreading loading method provides technical support.Server is that each three-dimension GIS data cell to be loaded is distributed a thread, then by each three-dimension GIS data cell respectively the thread by separately be loaded in memory block.
103, whole three-dimension GIS data cells are integrated into to complete three-dimensional scenic.
In the present embodiment, the three-dimension GIS data cell that server will be loaded in memory block is integrated, and obtains complete three-dimensional scenic, after this, can be shown it.
In the present embodiment, at first server is several three-dimension GIS data cells according to preset fractionation rule by the three-dimension GIS Data Division, then be that each three-dimension GIS data cell is distributed a thread, thread by each three-dimension GIS data cell by separately is loaded into memory block, finally, whole three-dimension GIS data cells are integrated into to complete three-dimensional scenic.Owing to being several three-dimension GIS data cells by former three-dimension GIS Data Division, load respectively the three-dimension GIS data cell by a plurality of threads, load to compare with the prior art single thread and improved loading velocity.Finally integrating whole three-dimension GIS data cells is complete three-dimensional scenic, thereby has solved card screen problem.
Below specifically describe the process that the three-dimension GIS Data Division is the three-dimension GIS data cell, at first it should be noted that the three-dimension GIS data comprise image data or three-dimensional modeling data.
Below the split process to image data:
At first, by image data, build image pyramid, obtain tile data;
For example, this image pyramid has 8 layers, and so every one deck can be used as a tile data unit, namely 8 tile data unit.
Then, tile data is carried out to zone and divide, obtain the tile data unit.
Below the split process to three-dimensional modeling data:
At first it should be noted that the three-dimension GIS model data comprises geometric data and/or data texturing.
At first, three-dimensional modeling data is classified, obtained geometric data and/or data texturing; The possibility of result obtained is to only have geometric data or only have data texturing, or both has.
Then, geometric data is used to the first decomposition method, obtain geometry data elements, data texturing is used to the second decomposition method, obtain texture data unit.Here the first decomposition method of mentioning and the second decomposition method are to be diverse ways in order to distinguish both, in concrete application, can use different decomposition methods with regard to different data types.It should be noted that, it can also be compressed after decomposition.
Below the process that the three-dimension GIS data cell is loaded:
Because the data cell load mode to different is different.
Can use the first loading method for each tile data unit distributes a thread, the thread by each tile data unit by separately is loaded into memory block.
Can distribute a thread for each geometry data elements, use the second loading method, thread by each geometry data elements by separately is loaded into memory block, for each texture data unit is distributed a thread, use the 3rd loading method, the thread by each texture data unit by separately is loaded into memory block.
Three-dimension GIS data rapid loading method the first embodiment that the above provides the embodiment of the present invention is described, and below refers to Fig. 2, and the second embodiment of a kind of three-dimension GIS data rapid loading method of the present invention specifically comprises:
201, according to preset fractionation rule, by the three-dimension GIS Data Division, be several three-dimension GIS data cells;
202, be that each three-dimension GIS data cell is distributed a thread, the thread by each three-dimension GIS data cell by separately is loaded into memory block;
In above-mentioned steps 201 and step 202 and the first embodiment, step 101 and step 102 are in full accord, do not do and repeat.
203, set up the buffer zone queue in memory block;
In the present embodiment, step 203, also can be before step 201 or step 202 before step 204, and owing to directly data cell being placed in memory block, memory block is controlled poor effect to the data unit, therefore need to set up the buffer zone queue.Data to memory block are carried out organization and administration, have solved the three-dimension GIS data and have loaded and show unmatched problem.
204, the three-dimension GIS data cell is stored in the buffer zone queue;
205, the three-dimension GIS data cell is managed;
In the present embodiment, server is sorted to all kinds of three-dimension GIS data cells in the buffer zone queue, the operations such as release.
206, whole three-dimension GIS data cells are integrated into to complete three-dimensional scenic.
In the present embodiment, the three-dimension GIS data cell that server will be loaded in memory block is integrated, and obtains complete three-dimensional scenic, after this, can be shown it.
A kind of three-dimension GIS data load method embodiment that the above provides the embodiment of the present invention is illustrated, and below refers to Fig. 3, a kind of three-dimension GIS data rapid loading device that the embodiment of the present invention also provides, and embodiment specifically comprises:
Load-on module 303, for by each three-dimension GIS data cell, the thread by separately is loaded into memory block;
Integrate module 304, for being integrated into complete three-dimensional scenic by whole three-dimension GIS data cells.
Correspondence between a kind of each module of three-dimension GIS data rapid loading device below provided with the explanation of the example in the practicality embodiment of the present invention:
In the present embodiment, when server starts to carry out three-dimension GIS data loading tasks, at first splitting module 301 is several three-dimension GIS data cells by the three-dimension GIS Data Division, the three-dimension GIS data can comprise numerous types of data, different data types can adapt to different fractionation rules, split resulting three-dimension GIS data cell and can be understood as the different pieces of information group, and memory block is as being loaded into the front data type conversion of internal memory step.At this, concrete three-dimension GIS data, three-dimension GIS data cell and preset fractionation rule are not limited, particular content will launch explanation in subsequent embodiment.
In the present embodiment, use OSG to support multithreading to load, for the multithreading loading method provides technical support.Distribution module 302 is that each three-dimension GIS data cell to be loaded is distributed a thread, then load-on module 303 by each three-dimension GIS data cell respectively the thread by separately be loaded in memory block.
Finally, integrate module 304 is integrated into complete three-dimensional scenic by whole three-dimension GIS data cells.
In the present embodiment, the three-dimension GIS data cell that server will be loaded in memory block is integrated, and obtains complete three-dimensional scenic, after this, can be shown it.
In the present embodiment, at first splitting module 301 is several three-dimension GIS data cells according to preset fractionation rule by the three-dimension GIS Data Division, then distribution module 302 is that each three-dimension GIS data cell is distributed a thread, by each three-dimension GIS data cell, the thread by separately is loaded into memory block to load-on module 303, finally, integrate module 304 is integrated into complete three-dimensional scenic by whole three-dimension GIS data cells.Owing to being several three-dimension GIS data cells by former three-dimension GIS Data Division, load respectively the three-dimension GIS data cell by a plurality of threads, load to compare with the prior art single thread and improved loading velocity.Finally integrating whole three-dimension GIS data cells is complete three-dimensional scenic, thereby has solved card screen problem.
A kind of three-dimension GIS data loading device that the embodiment of the present invention provides further comprises:
Set up module 305, for set up the buffer zone queue at memory block;
The those skilled in the art can be well understood to, for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
In the several embodiment that provide in the application, should be understood that, disclosed system, apparatus and method, can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual the realization, other dividing mode can be arranged, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as the separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed on a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the purpose of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, also can adopt the form of SFU software functional unit to realize.
If the form of SFU software functional unit of usining described integrated unit realizes and during as production marketing independently or use, can be stored in a computer read/write memory medium.Understanding based on such, the all or part of of the part that technical scheme of the present invention contributes to prior art in essence in other words or this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) carry out all or part of step of the described method of each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, ROM (read-only memory) (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disc or CDs.
The above, above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: its technical scheme that still can put down in writing aforementioned each embodiment is modified, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a three-dimension GIS data rapid loading method, is characterized in that, comprising:
According to preset fractionation rule, by the three-dimension GIS Data Division, be several three-dimension GIS data cells;
For each three-dimension GIS data cell is distributed a thread, the thread by each three-dimension GIS data cell by separately is loaded into memory block;
Whole three-dimension GIS data cells are integrated into to complete three-dimensional scenic.
2. three-dimension GIS data rapid loading method according to claim 1, is characterized in that,
Described three-dimension GIS data comprise image data or three-dimensional modeling data.
3. three-dimension GIS data rapid loading method according to claim 2, is characterized in that,
Describedly according to preset fractionation rule, the three-dimension GIS Data Division is comprised for several three-dimension GIS data cells:
Build image pyramid by image data, obtain tile data;
Described tile data is carried out to zone and divide, obtain the tile data unit.
4. three-dimension GIS data rapid loading method according to claim 2, is characterized in that,
Describedly according to preset fractionation rule, the three-dimension GIS Data Division is comprised for several three-dimension GIS data cells:
Three-dimensional modeling data is classified, obtained geometric data and/or data texturing;
Described geometric data is used to the first decomposition method, obtain geometry data elements, described data texturing is used to the second decomposition method, obtain texture data unit.
5. three-dimension GIS data rapid loading method according to claim 3, is characterized in that,
Described is that each three-dimension GIS data cell is distributed a thread, and the thread by each three-dimension GIS data cell by separately is loaded into memory block and comprises:
For each tile data unit distributes a thread, use the first loading method, the thread by each tile data unit by separately is loaded into memory block.
6. three-dimension GIS data rapid loading method according to claim 4, is characterized in that,
Described is that each three-dimension GIS data cell is distributed a thread, and the thread by each three-dimension GIS data cell by separately is loaded into memory block and comprises:
For each geometry data elements is distributed a thread, use the second loading method, thread by each geometry data elements by separately is loaded into memory block, for each texture data unit is distributed a thread, use the 3rd loading method, the thread by each texture block by separately is loaded into memory block.
7. according to the described three-dimension GIS data of any one in claim 1 to 6 rapid loading method, it is characterized in that,
Described is that each three-dimension GIS data cell is distributed a thread, after the thread by each three-dimension GIS data cell by separately is loaded into the memory block step, describedly also comprises before whole three-dimension GIS data cells are integrated into to complete three-dimensional scenic step:
Set up the buffer zone queue in memory block;
Described three-dimension GIS data cell is stored in the buffer zone queue;
Described GIS data cell is managed.
8. a three-dimension GIS data rapid loading device, is characterized in that, comprising:
Split module, for being several three-dimension GIS data cells according to preset fractionation rule by the three-dimension GIS Data Division;
Distribution module, be used to each three-dimension GIS data cell to distribute a thread;
Load-on module, for by each three-dimension GIS data cell, the thread by separately is loaded into memory block;
Integrate module, for being integrated into complete three-dimensional scenic by whole three-dimension GIS data cells.
9. three-dimension GIS data rapid loading device according to claim 8, is characterized in that,
Described device also comprises:
Set up module, for set up the buffer zone queue at memory block;
Storage module, for being stored into the buffer area queue by the three-dimension GIS data cell;
Administration module, manage for all kinds of three-dimension GIS data cells.
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