CN105630967A - Caching method and device based on GIS display data - Google Patents
Caching method and device based on GIS display data Download PDFInfo
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- CN105630967A CN105630967A CN201510989439.6A CN201510989439A CN105630967A CN 105630967 A CN105630967 A CN 105630967A CN 201510989439 A CN201510989439 A CN 201510989439A CN 105630967 A CN105630967 A CN 105630967A
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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
- G06F16/24—Querying
- G06F16/245—Query processing
- G06F16/2455—Query execution
- G06F16/24552—Database cache management
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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
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Abstract
The embodiment of the invention discloses a caching method and device based on GIS display data. The technical scheme for improving data caching on a thematic layer is achieved. The technical problem that when caching data in a caching list exceeds a limit, the data cannot be cached, and accordingly the data processing efficiency is low when caching is performed is solved. The caching method based on GIS display data includes the steps that according to a map display instruction, it is determined that the GIS display data corresponding to the map display instruction is not cached into the caching list; the GIS display data is acquired, whether the GIS display data exceeds a caching limit of the current caching list or not is judged, and if yes, caching data with lowest priority is deleted according to the priority.
Description
Technical field
The present invention relates to technical field of data processing, particularly relate to a kind of caching method based on GIS video data and device.
Background technology
GIS-Geographic Information System (GeographicInformationSystem or Geo-Informationsystem, GIS) is also called " GeoscienceInformation System " sometimes. It is a kind of specific highly important space information system. It is under computer hardware and software system is supported, the relevant geographic distribution data in earth top layer (including atmosphere) space all or in part be acquired, store, manage, computing, the technological system analyzing, be shown and described.
In the prior art; in order to realize the display of map in Distributed GIS; caching technology would generally be adopted; its cache policy is under the premise of the currently displaying range data of buffer memory; its viewing area is expanded in surrounding; namely increase the buffer memory to current display area adjacent area, so directly read when picture up and down or left and right moves and data cached realize performance boost. Relatively very big lifting is had with from disk or network reading map datum in this scheme, but it is limited by the size of buffer zone, is only applicable to the movement (needing when displacement is beyond buffer area to read data from disk or network) of the little scope of map.
On this basis, prior art is it is also proposed that a kind of new scheme, increase the data buffer storage to special layer, namely set up corresponding buffer memory according to special layer, systematic function can be improved when performing special layer search (being probably large range of changes in coordinates). But this kind of scheme customizes in advance, and need to pre-define buffer memory restriction relation (simply just setting up buffer memory when special layer, random mobile operation is invalid). And under normal conditions, different application scenarios is likely to corresponding different map operations.
But, the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory.
Summary of the invention
A kind of caching method based on GIS video data of embodiment of the present invention offer and device, solve the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory.
A kind of caching method based on GIS video data that the embodiment of the present invention provides, including:
Idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction is uncached to cache list;
Obtain described GIS video data, and judge whether described GIS video data exceeds the buffer memory limit of presently described cache list, if so, then according to priority, the data cached of lowest priority is deleted.
Alternatively, idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction uncached to cache list before also includes:
Setting up the structure of data cached bag, described structure includes data cached, operation count and last operation time.
Alternatively, idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction is uncached to be specifically included to cache list:
Get the described map denotation instruction of moving map;
Body of a map or chart to be shown is determined according to described map instructions;
Described GIS video data is calculated according to described body of a map or chart to be shown;
Determine with in described uncached to the described cache list of GIS video data.
Alternatively, obtain described GIS video data, and judge that described GIS video data is whether beyond the buffer memory limit of presently described cache list, if so, then according to priority, lowest priority data cached is carried out deletion and specifically include:
Obtain described GIS video data, and judge whether described GIS video data exceeds the buffer memory limit of presently described cache list, if, then according to the described operation count in described structure and described last operation time, delete that described operation count is little and that described last operation is of long duration is described data cached.
Alternatively, obtain described GIS video data, and judge whether described GIS video data exceeds the buffer memory limit of presently described cache list, if, then according to the described operation count in described structure and described last operation time, delete that described operation count is little and described last operation is of long duration described data cached after also include:
Described GIS video data in described cache list is rendered display.
A kind of buffer storage based on GIS video data that the embodiment of the present invention provides, including:
Determine unit, for idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction is uncached to cache list;
Caching process unit, is used for obtaining described GIS video data, and judges whether described GIS video data exceeds the buffer memory limit of presently described cache list, if so, then deleted by the data cached of lowest priority according to priority.
Alternatively, the described buffer storage based on GIS video data also includes:
Setting up unit, for setting up the structure of data cached bag, described structure includes data cached, operation count and last operation time.
Optionally it is determined that unit specifically includes:
Obtain subelement, get the described map denotation instruction of moving map;
First determines subelement, for determining body of a map or chart to be shown according to described map instructions;
Computation subunit, for calculating described GIS video data according to described body of a map or chart to be shown;
Second determines subelement, be used for determining with in described uncached to the described cache list of GIS video data.
Alternatively, caching process unit specifically includes:
Judgment sub-unit, is used for obtaining described GIS video data, and judges whether described GIS video data exceeds the buffer memory limit of presently described cache list, if so, then triggers caching process subelement;
Described caching process subelement, for according to the described operation count in described structure and described last operation time, deletes that described operation count is little and that described last operation is of long duration is described data cached.
Alternatively, the described buffer storage based on GIS video data also includes:
Rendering unit, for rendering display to the described GIS video data in described cache list.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
A kind of caching method based on GIS video data of embodiment of the present invention offer and device, wherein, caching method based on GIS video data includes: idsplay order according to the map, it is determined that the GIS video data corresponding with map denotation instruction is uncached to cache list, obtain GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if so, then according to priority, the data cached of lowest priority is deleted. in the present embodiment, by idsplay order according to the map, determine that the GIS video data corresponding with map denotation instruction is uncached to cache list, finally obtain GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if, then according to priority, the data cached of lowest priority is deleted, solve the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
The schematic flow sheet of one embodiment of a kind of caching method based on GIS video data that Fig. 1 provides for the embodiment of the present invention;
The schematic flow sheet of another embodiment of a kind of caching method based on GIS video data that Fig. 2 provides for the embodiment of the present invention;
The structural representation of one embodiment of a kind of buffer storage based on GIS video data that Fig. 3 provides for the embodiment of the present invention;
The structural representation of another embodiment of a kind of buffer storage based on GIS video data that Fig. 4 provides for the embodiment of the present invention;
Fig. 5 is the application examples schematic diagram of Fig. 2;
Fig. 6 is data cached bag schematic diagram.
Detailed description of the invention
A kind of caching method based on GIS video data of embodiment of the present invention offer and device, solve the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory.
For making the goal of the invention of the present invention, feature, the advantage can be more obvious and understandable, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, the embodiments described below are only a part of embodiment of the present invention, and not all embodiment. Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
Referring to Fig. 1, an embodiment of a kind of caching method based on GIS video data that the embodiment of the present invention provides includes:
101, idsplay order according to the map, it is determined that the GIS video data corresponding with map denotation instruction is uncached to cache list;
In the present embodiment, it is likely to corresponding different map operations when needing different application scenarios, when carrying out intelligent buffer process according to different operation schemes, it is necessary first to idsplay order according to the map, it is determined that the GIS video data corresponding with map denotation instruction is uncached to cache list.
102, obtain GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if so, then perform step 103;
When idsplay order according to the map, determine the GIS video data corresponding with map denotation instruction uncached to cache list after, it is necessary to obtain GIS video data, and judge that GIS video data is whether beyond the buffer memory limit of current cache list, if so, step 103 is then performed.
103, according to priority, the data cached of lowest priority is deleted.
When judging that GIS video data is above the buffer memory limit of current cache list, then according to priority, the data cached of lowest priority is deleted.
In the present embodiment, by idsplay order according to the map, determine that the GIS video data corresponding with map denotation instruction is uncached to cache list, finally obtain GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if, then according to priority, the data cached of lowest priority is deleted, solve the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory.
The above is that the process to the caching method based on GIS video data is described in detail, the detailed process of each step will be described in detail below, referring to Fig. 2, another embodiment of a kind of caching method based on GIS video data that the embodiment of the present invention provides includes:
201, the structure of data cached bag is set up;
In the present embodiment, it is likely to corresponding different map operations when needing different application scenarios, when carrying out intelligent buffer process according to different operation schemes, it is necessary first to setting up the structure of data cached bag, structure includes data cached, operation count and last operation time.
202, the map denotation instruction of moving map is got;
After setting up the structure of data cached bag, it is necessary to get the map denotation instruction of moving map.
203, body of a map or chart to be shown is determined in instruction according to the map;
After the map denotation instruction getting moving map, it is necessary to body of a map or chart to be shown is determined in instruction according to the map.
204, GIS video data is calculated according to body of a map or chart to be shown;
After body of a map or chart to be shown is determined in instruction according to the map, it is necessary to calculate GIS video data according to body of a map or chart to be shown.
205, determine uncached with GIS video data to cache list;
After calculating GIS video data according to body of a map or chart to be shown, it is thus necessary to determine that uncached with GIS video data to cache list.
206, obtain GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if so, then perform step 207;
Uncached with GIS video data to after in cache list when determining, it is necessary to obtain GIS video data, and judge that GIS video data is whether beyond the buffer memory limit of current cache list, if so, then performs step 207.
207, according to the operation count in structure and last operation time, of long duration data cached of the deletion action little and last operation of counting;
When judging that GIS video data is above the buffer memory limit of current cache list, then according to the operation count in structure and last operation time, of long duration data cached of the deletion action little and last operation of counting.
208, the GIS video data in cache list is rendered display.
When according to the operation count in structure and last operation time, deletion action counting is little and last operation is of long duration data cached after, it is necessary to the GIS video data in cache list is rendered display.
As illustrated in figures 6 and 5, application examples includes:
Step one: set up the structure of data cached bag, except data cached, adds operation count and last operation time, as shown in Figure 5.
Step 2: after receiving moving map instruction, according to indication range calculates which map datum of needs.
Step 3: judge the data that whether there are needs in cache list, if it has, then directly take out, as being absent from, then enter step 4.
Step 4: after obtaining, from Map Services, the map datum needed.
1) judge data cached whether beyond Systematic definition value (artificially agreement);
2) as exceeded, then part is deleted according to cache policy data cached.
Deletion strategy: according to parameters (such as Fig. 6) such as the operation count in buffer memory pack arrangement and last operation times, deletion action counts relatively small and last operation time longer data.
3) again the data taken out from Map Services are joined cache list.
Step 5: obtain needing the data of display and carrying out rendering display.
In the present embodiment, by idsplay order according to the map, determine that the GIS video data corresponding with map denotation instruction is uncached to cache list, finally obtain GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if, then according to priority, the data cached of lowest priority is deleted, solve the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory, and intelligent buffer process can be carried out according to different operation schemes, it is greatly improved the adaptive capacity of system.
Referring to Fig. 3, an embodiment of a kind of buffer storage based on GIS video data provided in the embodiment of the present invention includes:
Determine unit 301, for idsplay order according to the map, it is determined that the GIS video data corresponding with map denotation instruction is uncached to cache list;
Caching process unit 302, is used for obtaining GIS video data, and judges whether GIS video data exceeds the buffer memory limit of current cache list, if so, then deleted by the data cached of lowest priority according to priority.
In the present embodiment, it is determined by unit 301 idsplay order according to the map, determine that the GIS video data corresponding with map denotation instruction is uncached to cache list, last caching process unit 302 obtains GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if, then according to priority, the data cached of lowest priority is deleted, solve the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory.
The above is that each unit to the buffer storage based on GIS video data is described in detail, each subelement will be described in detail below, referring to Fig. 4, another embodiment of a kind of buffer storage based on GIS video data provided in the embodiment of the present invention includes:
Setting up unit 401, for setting up the structure of data cached bag, structure includes data cached, operation count and last operation time.
Determine unit 402, for idsplay order according to the map, it is determined that the GIS video data corresponding with map denotation instruction is uncached to cache list;
Determine that unit 402 specifically includes:
Obtain subelement 4021, get the map denotation instruction of moving map;
First determines subelement 4022, determines body of a map or chart to be shown for instruction according to the map;
Computation subunit 4023, for calculating GIS video data according to body of a map or chart to be shown;
Second determines subelement 4024, is used for determining uncached with GIS video data to cache list.
Caching process unit 403, is used for obtaining GIS video data, and judges whether GIS video data exceeds the buffer memory limit of current cache list, if so, then deleted by the data cached of lowest priority according to priority.
Caching process unit 403 specifically includes:
Judgment sub-unit 4031, is used for obtaining GIS video data, and judges whether GIS video data exceeds the buffer memory limit of current cache list, if so, then triggers caching process subelement 4032;
Caching process subelement 4032, for according to the operation count in structure and last operation time, it is data cached that deletion action counting is little and last operation is of long duration.
Rendering unit 404, for rendering display to the GIS video data in cache list.
In the present embodiment, it is determined by unit 402 idsplay order according to the map, determine that the GIS video data corresponding with map denotation instruction is uncached to cache list, last caching process unit 403 obtains GIS video data, and judge whether GIS video data exceeds the buffer memory limit of current cache list, if, then according to priority, the data cached of lowest priority is deleted, solve the current technical scheme increasing the data buffer storage to special layer, when data cached in cache list breaks bounds, just cannot be data cached, thus the technical problem of the inefficiency that data process when result in buffer memory, and intelligent buffer process can be carried out according to different operation schemes, it is greatly improved the adaptive capacity of system.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description, the specific works process of device and unit, it is possible to reference to the corresponding process in preceding method embodiment, do not repeat them here.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method, it is possible to realize by another way. Such as, device embodiment described above is merely schematic, such as, the division of described unit, being only a kind of logic function to divide, actual can have other dividing mode when realizing, for instance multiple unit or assembly can in conjunction with or be desirably integrated into another system, or some features can ignore, or do not perform. Another point, shown or discussed coupling each other or direct-coupling or communication connection can be through INDIRECT COUPLING or the communication connection of some interfaces, device or unit, it is possible to be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, and the parts shown as unit can be or may not be physical location, namely may be located at a place, or can also be distributed on multiple NE. Some or all of unit therein can be selected according to the actual needs to realize the purpose of the present embodiment scheme.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to be that unit is individually physically present, it is also possible to two or more unit are integrated in a unit. Above-mentioned integrated unit both can adopt the form of hardware to realize, it would however also be possible to employ the form of SFU software functional unit realizes.
If described integrated unit is using the form realization of SFU software functional unit and as independent production marketing or use, it is possible to be stored in a computer read/write memory medium. Based on such understanding, part or all or part of of this technical scheme that prior art is contributed by technical scheme substantially in other words can embody with the form of software product, this computer software product is stored in a storage medium, including some instructions with so that a computer equipment (can be personal computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention. And aforesaid storage medium includes: USB flash disk, portable hard drive, read only memory (ROM, Read-OnlyMemory), the various media that can store program code such as random access memory (RAM, RandomAccessMemory), magnetic disc or CD.
The above, above example only in order to technical scheme to be described, is not intended to limit; Although the present invention being described in detail with reference to previous embodiment, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein portion of techniques feature is carried out equivalent replacement; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.
Claims (10)
1. the caching method based on GIS video data, it is characterised in that including:
Idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction is uncached to cache list;
Obtain described GIS video data, and judge whether described GIS video data exceeds the buffer memory limit of presently described cache list, if so, then according to priority, the data cached of lowest priority is deleted.
2. the caching method based on GIS video data according to claim 1, it is characterised in that idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction is uncached also to be included before to cache list:
Setting up the structure of data cached bag, described structure includes data cached, operation count and last operation time.
3. the caching method based on GIS video data according to claim 2, it is characterised in that idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction is uncached to be specifically included to cache list:
Get the described map denotation instruction of moving map;
Body of a map or chart to be shown is determined according to described map instructions;
Described GIS video data is calculated according to described body of a map or chart to be shown;
Determine with in described uncached to the described cache list of GIS video data.
4. the caching method based on GIS video data according to claim 3, it is characterized in that, obtain described GIS video data, and judge whether described GIS video data exceeds the buffer memory limit of presently described cache list, if so, then according to priority, lowest priority data cached is carried out deletion to specifically include:
Obtain described GIS video data, and judge whether described GIS video data exceeds the buffer memory limit of presently described cache list, if, then according to the described operation count in described structure and described last operation time, delete that described operation count is little and that described last operation is of long duration is described data cached.
5. the caching method based on GIS video data according to claim 4, it is characterized in that, obtain described GIS video data, and judge whether described GIS video data exceeds the buffer memory limit of presently described cache list, if, then according to the described operation count in described structure and described last operation time, delete that described operation count is little and described last operation is of long duration described data cached after also include:
Described GIS video data in described cache list is rendered display.
6. the buffer storage based on GIS video data, it is characterised in that including:
Determine unit, for idsplay order according to the map, it is determined that the GIS video data corresponding with described map denotation instruction is uncached to cache list;
Caching process unit, is used for obtaining described GIS video data, and judges whether described GIS video data exceeds the buffer memory limit of presently described cache list, if so, then deleted by the data cached of lowest priority according to priority.
7. the buffer storage based on GIS video data according to claim 6, it is characterised in that the described buffer storage based on GIS video data also includes:
Setting up unit, for setting up the structure of data cached bag, described structure includes data cached, operation count and last operation time.
8. the buffer storage based on GIS video data according to claim 7, it is characterised in that determine that unit specifically includes:
Obtain subelement, get the described map denotation instruction of moving map;
First determines subelement, for determining body of a map or chart to be shown according to described map instructions;
Computation subunit, for calculating described GIS video data according to described body of a map or chart to be shown;
Second determines subelement, be used for determining with in described uncached to the described cache list of GIS video data.
9. the buffer storage based on GIS video data according to claim 8, it is characterised in that caching process unit specifically includes:
Judgment sub-unit, is used for obtaining described GIS video data, and judges whether described GIS video data exceeds the buffer memory limit of presently described cache list, if so, then triggers caching process subelement;
Described caching process subelement, for according to the described operation count in described structure and described last operation time, deletes that described operation count is little and that described last operation is of long duration is described data cached.
10. the buffer storage based on GIS video data according to claim 9, it is characterised in that the described buffer storage based on GIS video data also includes:
Rendering unit, for rendering display to the described GIS video data in described cache list.
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| CN111953755A (en) * | 2020-07-31 | 2020-11-17 | 中国第一汽车股份有限公司 | Map storage method and device, vehicle and computer storage medium |
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