CN105975541A - Device and method for controlling translation of electronic map - Google Patents
Device and method for controlling translation of electronic map Download PDFInfo
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- CN105975541A CN105975541A CN201610282793.XA CN201610282793A CN105975541A CN 105975541 A CN105975541 A CN 105975541A CN 201610282793 A CN201610282793 A CN 201610282793A CN 105975541 A CN105975541 A CN 105975541A
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- tile
- prestrain
- rank
- target
- display level
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Classifications
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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
- G06F16/95—Retrieval from the web
- G06F16/951—Indexing; Web crawling techniques
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B29/00—Maps; Plans; Charts; Diagrams, e.g. route diagram
- G09B29/003—Maps
- G09B29/005—Map projections or methods associated specifically therewith
-
- 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
Abstract
The invention discloses a device and method for controlling translation of an electronic map, wherein the method comprises the following steps of: searching multiple target tiles in need of being displayed in a loaded manner while receiving an instruction for translating a map; on the basis of the current display level, selecting a pre-loading display level, and searching preloaded tiles corresponding to the target tiles in the pre-loading display level; according to the priority, obtaining the preloaded tiles and the target tiles, loading and displaying the pre-loaded tiles in an amplified manner according to the level difference between the pre-loading display level and the current display level; and loading and displaying the target tiles so as to replace the amplified and pre-loaded tiles at the corresponding position after obtaining the target tiles. Fuzzy pre-loaded tiles are rapidly displayed by selecting the pre-loading display level and loading and displaying the pre-loaded tiles in an amplified manner; and thus, the effect that the blank probability in a window of the electronic map when the electronic map is translated is reduced is achieved.
Description
Present patent application is filing date December in 2013 30 days, Application No.
201310745517.9, in entitled " a kind of device controlling electronic chart translation and corresponding method "
The divisional application of state's application for a patent for invention.
Technical field
The present invention relates to electronic map technique field, be specifically related to a kind of device controlling electronic chart translation
With the method controlling electronic chart translation.
Background technology
Electronic map client side at present, the instruction translation map at the translation map according to user (refers to
The electronic chart networking clients such as Baidu's map, Tengxun's map, the most translatable by mouse-click dragging
Electronic chart) time, need to load the multiple target tile being positioned at currently displaying tile periphery, owing to needing
Will be to server request target tile and target tile is carried out image rendering etc. process, so in translation
During electronic chart, since it is desired that expend the more time so some tiles can not be shown in time, electronically
Figure window can exist blank；When network performance is the best, the blank of electronic chart becomes apparent from.
Summary of the invention
In view of the above problems, it is proposed that the present invention is to provide one to overcome the problems referred to above or at least partly
Ground solves the device controlling electronic chart translation of the problems referred to above and the corresponding side controlling electronic chart translation
Method.
According to one aspect of the present invention, it is provided that a kind of device controlling electronic chart translation, this device
Including: target tile arithmetic element, be suitable to, when receiving the instruction of translation map, find out and need to load
Multiple target tile of display；Prestrain tile arithmetic element, is suitable to select in advance based on currently displaying rank
Loaded and displayed rank, finds out prestrain tile corresponding with described target tile in prestrain display level；
Loading unit, is suitable to obtain prestrain tile and target tile according to priority, shows according to prestrain
Rank difference between rank and currently displaying rank loads and amplifies display prestrain tile；And when obtaining
After target tile, load and show that described target tile is to replace the amplification prestrain tile of correspondence position.
Alternatively, described prestrain tile arithmetic element, it is suitably selected for rank higher than currently displaying rank
Prestrain display level, the body of a map or chart represented by described prestrain tile includes the plurality of target tile
Represented body of a map or chart, and the geographic areas corresponding to each prestrain tile is corresponding to each target tile
N times of geographic areas, n=4k, k is natural number, represents prestrain display level and currently displaying level
Rank between Bie is poor.
Alternatively, described loading unit, be suitable to the transverse width of each prestrain tile and longitudinal height
All amplify m times to show, wherein, m=2k, k is natural number, represents that prestrain display level is with current
Rank between display level is poor.
Alternatively, this device also includes: buffer unit, is suitable to arrange local cache, and will show
Tile be saved in local cache.
Alternatively, when the tile shown is saved in local cache by described buffer unit, if local
The off-capacity of caching, the most described buffer unit removes least-recently-used tile from local cache.
Alternatively, described loading unit, be suitable to judge that whether described prestrain tile and target tile are at this
In ground caching, if being judged as YES, then from local cache, read prestrain tile and target tile, if sentencing
It is no for breaking, then download prestrain tile and target tile from server.
Alternatively, described loading unit, be suitable to while loaded targets tile, increase the pre-add amplified
Carry the transparency of tile；When the operation of loaded targets tile completes, remove the prestrain tile of amplification with
And display target tile.
According to a further aspect in the invention, it is provided that a kind of method controlling electronic chart translation, wherein,
The method includes: when receiving the instruction of translation map, find out the multiple targets watt needing loaded and displayed
Sheet；Based on currently displaying rank select prestrain display level, find out in prestrain display level with institute
State the prestrain tile that target tile is corresponding；Prestrain tile and target tile is obtained according to priority,
Load according to the rank difference between prestrain display level and currently displaying rank and amplify display prestrain watt
Sheet；After getting target tile, load and show that described target tile is to replace the amplification of correspondence position
Prestrain tile.
Alternatively, described prestrain display level is higher than currently displaying rank, described prestrain tile institute table
The body of a map or chart shown includes the body of a map or chart represented by the plurality of target tile, and each prestrain tile institute
Corresponding n times that geographic areas is the geographic areas corresponding to each target tile, n=4k, k is natural number,
Represent that the rank between prestrain display level and currently displaying rank is poor.
Alternatively, the described rank difference according between prestrain display level and currently displaying rank loads also
Amplify display prestrain tile, including: by the transverse width of each prestrain tile and longitudinally the most all put
Big m times shows, wherein, and m=2k, k is natural number, represents prestrain display level and currently displaying
Rank between rank is poor.
Alternatively, the method also includes: arrange local cache；The tile shown is saved in local slow
In depositing.
Alternatively, the method also includes: when being saved in local cache by the tile shown, if this
The off-capacity of ground caching, then remove least-recently-used tile from local cache.
Alternatively, described obtain prestrain tile and target tile according to priority and specifically include: judge
Whether described prestrain tile and target tile be in local cache, if being judged as YES, then from local cache
Middle reading prestrain tile and target tile, if being judged as NO, then from server download prestrain tile and
Target tile.
Alternatively, described loading show that described target tile is to replace the prestrain of amplification of correspondence position
Tile, specifically includes: while loaded targets tile, increases the transparency of the prestrain tile amplified；
When the operation of loaded targets tile completes, remove prestrain tile and the display target tile of amplification.
The device controlling electronic chart translation and the method for control electronic chart translation according to the present invention are permissible
By selecting prestrain display level and loading and amplifying display prestrain tile, display obscures rapidly
Prestrain tile, thus solves prior art when translating electronic chart, since it is desired that the more time
So some tiles, the problem that can there is more blank in electronic map window can not be shown in time, reach
Electronic map window exists when reducing translation electronic chart the effect of the probability of blank.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the skill of the present invention
Art means, and can being practiced according to the content of description, and in order to allow, the present invention's is above and other
Objects, features and advantages can become apparent, below especially exemplified by the detailed description of the invention of the present invention.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit for this
Field those of ordinary skill will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation,
And it is not considered as limitation of the present invention.And in whole accompanying drawing, be denoted by the same reference numerals
Identical parts.In the accompanying drawings:
Fig. 1 shows the flow process of the method controlling electronic chart translation according to an embodiment of the invention
Figure；
Fig. 2 shows the detailed flow chart of step S400 as shown in Figure 1；
Fig. 3 shows the block diagram of the device controlling electronic chart translation according to a first embodiment of the present invention；
Fig. 4 shows the block diagram of the device controlling electronic chart translation according to a second embodiment of the present invention；
And
Fig. 5 shows the schematic diagram of the electronic map client side realized according to the present invention.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing shows
The exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and not
Should be limited by embodiments set forth here.On the contrary, it is provided that these embodiments are able to more thoroughly
Understand the disclosure, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
The technology design of the present invention essentially consists in, and when receiving the instruction of translation map, determines prestrain
Display level, finds out the target tile that need to show and (the map model that i.e. represent corresponding with target tile
Enclose correspondence) prestrain tile.Owing to the number of prestrain tile is fewer than the number of target tile (such as
Body of a map or chart represented by one prestrain tile be equivalent to lower level other four or 16 or more multiple
Body of a map or chart represented by target tile), so being downloaded prestrain tile by server and loading prestrain watt
Needed for time required for sheet is than using prior art to be downloaded target tile and loaded targets tile by server
The time wanted is short, by being loaded by prestrain tile and amplifying the prestrain tile that display is fuzzy, Yi Ji
After getting target tile, load and show the target tile amplification prestrain tile with replacement correspondence position,
When reducing enlarged map there is blank probability in electronic map window.By prestrain tile is loaded and puts
The prestrain tile that big display is fuzzy, and after getting target tile, load and show target tile
To replace the amplification prestrain tile of correspondence position, electronic chart shows as clearly showing that by obscuring
Journey.
It should be noted that the picture in electronic chart tile, i.e. grating map, these pictures are by certain
Rule, is spliced into a complete electronic chart, is amplified by electronic chart, can show other watt of lower level
Sheet, the more low-level single tile of the body of a map or chart represented by single tile of higher level in this area
Represented body of a map or chart is big, and such as, in adjacent rank, a tile of higher level is equivalent to lower level
Body of a map or chart represented by other four tiles, rank difference is in two ranks of two, of higher level
Tile is equivalent to the body of a map or chart represented by 16 tiles of relatively low rank.
Fig. 1 shows the flow process of the method controlling electronic chart translation according to an embodiment of the invention
Figure.The method comprises the steps that S100 is to step S400:
S100, receive translation map instruction time, find out the multiple target tile needing loaded and displayed.
Wherein, those skilled in the art it can be appreciated that, described target tile, i.e. under currently displaying rank,
The new tile loaded is needed during translation map.Specifically, during translation map, need new loaded and displayed current
A body of a map or chart outside the body of a map or chart of display, described target tile is i.e. corresponding to needing new loading aobvious
The body of a map or chart shown.
S200, based on currently displaying rank select prestrain display level, find out prestrain display level
In the prestrain tile corresponding with described target tile.
In the present embodiment, prestrain display level is higher than currently displaying rank.Represented by prestrain tile
Body of a map or chart includes the body of a map or chart represented by multiple target tile, and the ground corresponding to each prestrain tile
Reason area is n times of the geographic areas corresponding to each target tile, n=4k, k is natural number, represents pre-
Rank between loaded and displayed rank and currently displaying rank is poor.
It is preferred that in the present embodiment, in order to represent the information on map, electronic chart all sidedly in more detail
Preservation use classification tile mechanism, map is divided into multiple level preserve, under each level, deposits phase
The grating map tile answered, as a example by the tile under two adjacent display levels, the display that display level is low
Four adjacent tiles (four adjacent tiles in sphere of movements for the elephants shape of i.e. 2 × 2) under rank are corresponding to aobvious
Show a tile under the display level that rank is high；As a example by the two layers of tiles that rank difference is two, display
16 adjacent tiles (16 adjacent tiles of i.e. 4 × 4) under the display level that rank is low are corresponding
A tile under the display level that display level is high.In the present embodiment, search prestrain tile
Method, can be to utilize the corresponding relation with target tile to be rounded by division according to the numbering of target tile
Computing obtains the numbering of prestrain tile.In the present embodiment, due to the corresponding multiple mesh of each prestrain tile
Mark tile, so the body of a map or chart represented by described prestrain tile is likely larger than the plurality of target tile
Represented body of a map or chart.
S300, obtain prestrain tile and target tile according to priority, according to prestrain display level
With the rank difference between currently displaying rank loads and amplifies display prestrain tile.By first showing mould
The low amplification prestrain tile of definition stuck with paste, loading velocity is fast, reduces and shows sky on electronic chart
The probability of white tile.
In the present embodiment, load also according to the rank difference between prestrain display level and currently displaying rank
Amplify display prestrain tile, including: by the transverse width of each prestrain tile and longitudinally the most all put
Big m times shows, wherein, and m=2k, k is natural number, represents prestrain display level and currently displaying
Rank between rank is poor.That is, if the rank between prestrain display level and currently displaying rank is poor
It is 1 transverse width by each prestrain tile and is longitudinally the most all enlarged into 2 times and shows；As
Rank difference between really prestrain display level and currently displaying rank be 2 by each prestrain tile
Transverse width and longitudinal direction are the most all enlarged into 4 times and show.
S400, after getting target tile, load and show that described target tile is to replace correspondence position
Amplification prestrain tile.By using target tile clearly to replace corresponding fuzzy amplification prestrain
Tile, it is achieved clear display map and map denotation clearly indicate effect by obscuring.
Summary step S100, S200, S300 and S400, the present embodiment shows by selecting prestrain
Show rank and loading and amplify display prestrain tile, showing fuzzy prestrain tile rapidly, reduce
The probability of the blank tile of electronic chart display.
By performing step S200 and step S300 in the present embodiment, it is possible to select a ratio currently displaying
The high prestrain display level of rank and the amplification prestrain tile shown in this prestrain display level.Logical
Cross repeated execution of steps S200 and step S300, it is also possible to select multiple higher than currently displaying rank pre-
Loaded and displayed rank and show the amplification prestrain tile in multiple prestrain display level, is embodied as
In, can amplification prestrain tile in the higher prestrain display level of first display level, then display level
Amplification prestrain tile in not relatively low prestrain display level, realizes map denotation equally by obscuring
Clearly indicate effect.
Further, the method also includes: arrange local cache；The tile shown is saved in this locality
In caching.More specifically, the present embodiment is by creating local cache, control the request frequency of tile.Put
During big map, it is possible to the tile that preferential display has been cached, reduce user and see the probability of blank, and
And utilize caching can improve loading velocity, in the case of server end does not add caching head, also can keep away
Exempt from repetitive requests tile.Then the method for the present embodiment also includes: the tile shown is being saved in this
Time in ground caching, if the off-capacity of local cache, then remove least-recently-used from local cache
Tile.In other words, the realization of caching uses LRU (Least Recently Used, least recently used)
Strategy, when the tile in caching exceedes the capacity that caching sets, can preferentially eliminate least-recently-used watt
Sheet.
It is preferred that the selection prestrain display level method for distinguishing in above-mentioned steps S200, it is to select ratio to work as
Several ranks that front display level is high, select prestrain display level from described each rank, specifically sentence
Tile corresponding with target tile in disconnected each rank described in the buffer or needs to be downloaded by server, choosing
The rank that selecting needs the tile number downloaded by server minimum is prestrain display level thus accelerates from clothes
The speed of prestrain tile downloaded by business device, if needing the tile number phase downloaded by server further
With, then the rank that prioritizing selection is higher ranked is prestrain display level thus reduces the prestrain that need to process
The number of tile is with speed up processing further.
In the present embodiment, above-mentioned steps S300 obtain prestrain tile and target watt according to priority
Sheet specifically includes: judge prestrain tile and target tile whether in local cache, if being judged as YES,
From local cache, then reading prestrain tile and target tile, if being judged as NO, then downloading from server
Prestrain tile and target tile.By the preferential tile obtained in caching, it is possible to increase loading velocity.
Fig. 2 shows the detailed flow chart of step S400 as shown in Figure 1.The loading of step S400
And show that target tile, to replace the prestrain tile of amplification of correspondence position, specifically includes following steps:
S410, while loaded targets tile, increase the transparency of prestrain tile amplified.Change speech
It, when loaded targets tile, gradually become transparent by the prestrain tile of amplification.
S420, when the operation of loaded targets tile completes, remove prestrain tile and the display of amplification
Target tile.Specifically, the several target tile corresponding to a prestrain tile amplified have loaded
Time, removing the prestrain tile of this amplification, several target tile that display has loaded, electronic chart is more
Clearly.
In the present embodiment, according to different browsers version, it is provided that the different mechanism that renders, improve and render watt
Piece performance, to ensure loading in step S300 and to amplify display prestrain tile operation and step S400
In loading and show the fluency that target tile operates.Such as, for supporting browsing of webgl interface
Device, it is provided that WebglRenderer renders mechanism；For the browser of support HTML5 label C anvas,
CanvasRenderer is provided to render mechanism；For the browser supporting CSS3, it is provided that CSSRenderer
Render mechanism；For lowest version browsers such as IE6, IE7, IE8, it is provided that FlashRendere renders machine
System；For all browsers, it is provided that DivRenderer renders mechanism.
Fig. 3 shows the block diagram of the device controlling electronic chart translation according to a first embodiment of the present invention.
This device includes target tile arithmetic element 100, prestrain tile arithmetic element 200 and loading unit 300.
Target tile arithmetic element 100, is suitable to, when receiving the instruction of translation map, find out and need to add
Carry multiple target tile of display.Wherein, currently displaying rank is higher than target display level.Wherein, originally
Skilled person it can be appreciated that, target display level be according to user input enlarged map
Depending on instruction, in other words, target display level be operated after the display level of electronic chart.
Map is amplified by this area, the other tile of lower level, the ground represented by the tile of higher level can be shown
It is big that figure scope compares the body of a map or chart represented by low level tile, and therefore target display level shows than current
Show that rank is low.
Prestrain tile arithmetic element 200, is suitable to select prestrain display level based on currently displaying rank,
Find out prestrain tile corresponding with described target tile in prestrain display level.
In the present embodiment, prestrain tile arithmetic element 200, it is suitably selected for rank than currently displaying rank
High prestrain display level, the body of a map or chart represented by described prestrain tile includes the plurality of target
Body of a map or chart represented by tile, and the geographic areas corresponding to each prestrain tile is each target tile institute
N times of corresponding geographic areas, n=4k, k is natural number, represents prestrain display level and currently shows
Show that the rank between rank is poor.
In the present embodiment, in order to represent the information on map all sidedly in more detail, the preservation of electronic chart is adopted
By classification tile mechanism, map is divided into multiple level preserve, under each level, deposits corresponding grid
Map tile, as a example by the tile under two adjacent display levels, under the display level that display level is low
Four adjacent tiles (four adjacent tiles in sphere of movements for the elephants shape of i.e. 2 × 2) are high corresponding to display level
A display level under a tile；As a example by the two layers of tiles that rank difference is two, display level is low
16 adjacent tiles (16 adjacent tiles of i.e. 4 × 4) under one display level correspond to display level
A tile under a not high display level.In the present embodiment, prestrain tile arithmetic element 200 is looked into
The method looking for prestrain tile, can be to utilize the corresponding relation with target tile according to the volume of target tile
The numbering of prestrain tile number is obtained by division rounding operation.In the present embodiment, due to each prestrain
The corresponding multiple target tile of tile, so the body of a map or chart represented by described prestrain tile is likely larger than institute
State the body of a map or chart represented by multiple target tile.
Loading unit 300, is suitable to obtain prestrain tile and target tile, according in advance according to priority
Rank difference between loaded and displayed rank and currently displaying rank loads and amplifies display prestrain tile；With
And after getting target tile, load and show that described target tile is pre-with the amplification replacing correspondence position
Load tile.By first showing fuzzy amplification prestrain tile, loading velocity is fast, reduces at electricity
The probability of blank tile is shown on sub-map.Corresponding fuzzy by using target tile clearly to replace
Amplify prestrain tile, it is achieved clear display map and map denotation clearly indicate effect by obscuring.
In the present embodiment, loading unit 300, be suitable to the transverse width of each prestrain tile and longitudinal direction
The most all amplify m times to show, wherein, m=2k, k is natural number, represent prestrain display level and
Rank between currently displaying rank is poor.That is, if between prestrain display level and target display level
Rank difference to be 1 loading unit 300 by the transverse width of each prestrain tile and longitudinally the most all put
Greatly 2 times show；If the rank difference between prestrain display level and target display level is 2
Then the transverse width of each prestrain tile and longitudinal direction are the most all enlarged into 4 times and carry out by loading unit 300
Display.
In the present embodiment, loading unit 300, be suitable to while loaded targets tile, increase amplification
The transparency of prestrain tile；When the operation of loaded targets tile completes, remove the prestrain watt of amplification
Sheet and display target tile.Specifically, when loaded targets tile, by amplify prestrain tile by
Gradual change obtains transparent；When having loaded corresponding to the several target tile of prestrain tile amplified, shifting
Except the prestrain tile of this amplification, several target tile that display has loaded, make electronic chart apparent.
Fig. 4 shows the block diagram of the device controlling electronic chart translation according to a second embodiment of the present invention.
The present embodiment is similar to first embodiment as shown in Figure 3, and difference is, this device also includes:
Buffer unit 400.
Buffer unit 400, is suitable to arrange local cache, and is saved in by the tile shown local slow
In depositing.Create local cache by buffer unit 400, control the request frequency of tile.During translation map,
Can preferentially show the tile being cached, reduce user and see the probability of blank, and utilize caching
Loading velocity can be improved, in the case of server end does not add caching head, be also avoided that repetitive requests
Tile.
Further, when the tile shown is saved in local cache by buffer unit 400, if this
The off-capacity of ground caching, then buffer unit 400 removes least-recently-used tile from local cache.
Further, the loading unit 300 of the present embodiment, be suitable to judge described prestrain tile and target
Whether tile is in local cache, if being judged as YES, then reads prestrain tile and mesh from local cache
Mark tile, if being judged as NO, then downloads prestrain tile and target tile from server.By preferentially obtaining
Take the tile in caching, it is possible to increase loading velocity.
Fig. 5 shows the schematic diagram of the electronic map client side realized according to the present invention.By controlling electricity
The device of sub-map translation and the method for control electronic chart translation, electronic map client side is according to using
When the instruction of person carries out translation, it is little to there is blank probability in electronic map window.
It should be understood that
Algorithm and display be not solid with any certain computer, virtual system or miscellaneous equipment provided herein
Have relevant.Various general-purpose systems can also be used together with based on teaching in this.As described above,
Construct the structure required by this kind of system to be apparent from.Additionally, the present invention is also not for any specific
Programming language.It is understood that, it is possible to use various programming languages realize the content of invention described herein,
And the description done language-specific above is the preferred forms in order to disclose the present invention.
In description mentioned herein, illustrate a large amount of detail.It is to be appreciated, however, that this
Inventive embodiment can be put into practice in the case of not having these details.In some instances, not
It is shown specifically known method, structure and technology, in order to do not obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure and help understand in each inventive aspect one
Or multiple, above in the description of the exemplary embodiment of the present invention, each feature of the present invention is sometimes
It is grouped together in single embodiment, figure or descriptions thereof.But, should be by the disclosure
Method be construed to reflect an intention that i.e. the present invention for required protection require ratio in each claim
The middle more feature of feature be expressly recited.More precisely, as the following claims reflect
As, inventive aspect is all features less than single embodiment disclosed above.Therefore, it then follows
Claims of detailed description of the invention are thus expressly incorporated in this detailed description of the invention, the most each right
Requirement itself is all as the independent embodiment of the present invention.
Those skilled in the art are appreciated that and can carry out the module in the equipment in embodiment certainly
Change adaptively and they are arranged in one or more equipment different from this embodiment.Permissible
Module in embodiment or unit or assembly are combined into a module or unit or assembly, and in addition may be used
To put them into multiple submodule or subelement or sub-component.Except such feature and/or process or
Outside at least some in unit excludes each other, can use any combination that (this specification is included companion
With claim, summary and accompanying drawing) disclosed in all features and so disclosed any method or
All processes of person's equipment or unit are combined.Unless expressly stated otherwise, this specification (includes companion
With claim, summary and accompanying drawing) disclosed in each feature can by provide identical, equivalent or phase
Replace like the alternative features of purpose.
Although additionally, it will be appreciated by those of skill in the art that embodiments more described herein include it
Some feature included in its embodiment rather than further feature, but the group of the feature of different embodiment
Close and mean to be within the scope of the present invention and formed different embodiments.Such as, in following power
In profit claim, one of arbitrarily can mode making in any combination of embodiment required for protection
With.
The all parts embodiment of the present invention can realize with hardware, or to process at one or more
The software module run on device realizes, or realizes with combinations thereof.Those skilled in the art should
Understand, microprocessor or digital signal processor (DSP) can be used in practice to realize basis
Some or all parts in the electronic chart translation device of the embodiment of the present invention some or all
Function.The present invention be also implemented as perform method as described herein part or all
Equipment or device program (such as, computer program and computer program).Such realization is originally
The program of invention can store on a computer-readable medium, or can have one or more signal
Form.Such signal can be downloaded from internet website and obtain, or provides on carrier signal,
Or provide with any other form.
The present invention will be described rather than limits the invention to it should be noted above-described embodiment,
And those skilled in the art can design replacement in fact without departing from the scope of the appended claims
Execute example.In the claims, should not will be located in any reference marks between bracket to be configured to right is wanted
The restriction asked.Word " comprises " and does not excludes the presence of the element or step not arranged in the claims.It is positioned at
Word "a" or "an" before element does not excludes the presence of multiple such element.The present invention is permissible
By means of including the hardware of some different elements and realizing by means of properly programmed computer.?
If listing in the unit claim of equipment for drying, several in these devices can be by same
Hardware branch specifically embodies.Word first, second and third use do not indicate that any order.
Can be title by these word explanations.
Claims (14)
1. controlling a device for electronic chart translation, this device includes:
Target tile arithmetic element, be suitable to receive translation map instruction time, find out need to load aobvious
The multiple target tile shown；
Prestrain tile arithmetic element, is suitable to select prestrain display level based on currently displaying rank, looks into
Find out prestrain tile corresponding with described target tile in prestrain display level；
Loading unit, is suitable to obtain prestrain tile and target tile, according to prestrain according to priority
Rank difference between display level and currently displaying rank loads and amplifies display prestrain tile；And work as
After getting target tile, load and show that described target tile is to replace the amplification prestrain of correspondence position
Tile.
Device the most according to claim 1, wherein,
Described prestrain tile arithmetic element, is suitably selected for the rank prestrain higher than currently displaying rank and shows
Show that rank, the body of a map or chart represented by described prestrain tile include represented by the plurality of target tile
Body of a map or chart, and the geographic areas corresponding to each prestrain tile is the geographical face corresponding to each target tile
Long-pending n times, n=4k, k is natural number, represents between prestrain display level and currently displaying rank
Rank is poor.
Device the most according to claim 1 and 2, wherein, this device also includes:
Buffer unit, is suitable to arrange local cache, and is saved in local cache by the tile shown.
4. according to the device described in any one of claim 1-3, wherein,
Described loading unit, is suitable to the transverse width of each prestrain tile and longitudinally the most all amplifies m
Display again, wherein, m=2k, k is natural number, represent prestrain display level and currently displaying rank it
Between rank poor.
5. according to the device described in any one of claim 1-4, wherein,
When the tile shown is saved in local cache by described buffer unit, if the appearance of local cache
Amount deficiency, the most described buffer unit removes least-recently-used tile from local cache.
6. according to the device described in any one of claim 1-5, wherein,
Described loading unit, be suitable to judge described prestrain tile and target tile whether in local cache,
If being judged as YES, then from local cache, read prestrain tile and target tile, if being judged as NO, then
Prestrain tile and target tile is downloaded from server.
7. according to the device described in any one of claim 1-6, wherein,
Described loading unit, is suitable to while loaded targets tile, increases the prestrain tile of amplification
Transparency；When the operation of loaded targets tile completes, remove prestrain tile and the display mesh of amplification
Mark tile.
8. the method controlling electronic chart translation, wherein, the method includes:
When receiving the instruction of translation map, find out the multiple target tile needing loaded and displayed；
Based on currently displaying rank select prestrain display level, find out in prestrain display level with institute
State the prestrain tile that target tile is corresponding；
Prestrain tile and target tile is obtained, according to prestrain display level with current according to priority
Rank difference between display level loads and amplifies display prestrain tile；
After getting target tile, load and show that described target tile is to replace the amplification of correspondence position
Prestrain tile.
Method the most according to claim 8, wherein,
Described prestrain display level is higher than currently displaying rank, the map represented by described prestrain tile
Scope includes the body of a map or chart represented by the plurality of target tile, and the ground corresponding to each prestrain tile
Reason area is n times of the geographic areas corresponding to each target tile, n=4k, k is natural number, represents pre-
Rank between loaded and displayed rank and currently displaying rank is poor.
Method the most according to claim 8 or claim 9, wherein, described according to prestrain display level
With the rank difference between currently displaying rank loads and amplifies display prestrain tile, including:
The transverse width of each prestrain tile and the most all amplifications m times are shown, wherein,
M=2k, k is natural number, represents that the rank between prestrain display level and currently displaying rank is poor.
11. methods described in-10 any one according to Claim 8, wherein, the method also includes:
Local cache is set；
The tile shown is saved in local cache.
12. methods described in-11 any one according to Claim 8, wherein, the method also includes:
When the tile shown is saved in local cache, if the off-capacity of local cache, then from
Local cache removes least-recently-used tile.
13. methods described in-12 any one according to Claim 8, wherein, described obtain according to priority
Take prestrain tile and target tile specifically include:
Judge described prestrain tile and target tile whether in local cache, if being judged as YES, then from
Local cache reading prestrain tile and target tile, if being judged as NO, then downloading pre-add from server
Carry tile and target tile.
14. methods described in-13 any claim according to Claim 8, wherein, described loading also shows
Show that described target tile, to replace the prestrain tile of the amplification of correspondence position, specifically includes:
While loaded targets tile, increase the transparency of the prestrain tile amplified；Work as loaded targets
When the operation of tile completes, remove prestrain tile and the display target tile of amplification.
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| CN201310745517.9A CN103714164B (en) | 2013-12-30 | 2013-12-30 | A kind of device and corresponding method controlling the translation of electronics map |
| CN201610282793.XA CN105975541A (en) | 2013-12-30 | 2013-12-30 | Device and method for controlling translation of electronic map |
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| CN103714164A (en) | 2014-04-09 |
| CN103714164B (en) | 2016-06-01 |
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