CN104143288A - Method and device for marking electronic map road display text - Google Patents
Method and device for marking electronic map road display text Download PDFInfo
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- CN104143288A CN104143288A CN201310162882.7A CN201310162882A CN104143288A CN 104143288 A CN104143288 A CN 104143288A CN 201310162882 A CN201310162882 A CN 201310162882A CN 104143288 A CN104143288 A CN 104143288A
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Abstract
The invention provides a method and device for marking electronic map road display text. The method comprises the steps that an electronic map at a first display level is obtained; a first text buffer area is established on a first road with display text needing marking; existing display text located in the first text buffer area on the electronic map is obtained, a display area of the existing display text is calculated, and the display area of the existing display text is removed from the first text buffer area to obtain a second text buffer area; a third text buffer area established on a second road with display text needing marking is obtained, the third text buffer area and the second text buffer area have an overlapped area, and the overlapped area is removed from the second text buffer area to obtain a text marking area of the first road at the first display level. By the adoption of the method and device, the work for manually adjusting electronic map marked text can be replaced, marking work of expressway display text is completed with one step, and it can be ensured that different pieces of display text do not overlap one another.
Description
Technical field
The present invention relates to electronic cartography technical field, refer in particular to a kind of method that electronic map road display text is marked and device.
Background technology
Display text is one of important content of electronic chart, and display text can greatly improve ability to express and the intelligibility of map.Display text mask method is one of the underlying issue in drawing field always.
In electronic chart manufacturers produce electronic chart process, can to Background factors such as the road key element newly increasing, facility key element, water system greenery patchess, carry out display text mark at independent process procedure.Wherein, the most important from the display text of advanced road (expressway around city at a high speed) element annotation.Owing to there being every year a large amount of roads to change, so will carry out label character to road newly-increased and that revise every year.
The classic method of high speed label character is to mark low-grade display text by program pre-service, then by manual type, adjusts layout and the position of display text, makes it mark to more high-grade, and guarantees that all grades do not exist word gland phenomenon.After each manual shift is complete, need to carry out the gland mistake of display text gland inspection to find that in adjustment process, artificial careless omission causes, and the mistake of finding is modified, until meet display text under all grades, there is not gland phenomenon.
Yet, adjust the position of display text and grade and be the heavy and work that easily makes mistakes.For electronic map data manufacturing enterprise, mark in process of production and adjust display text, especially to super expressway mark display text, be the process that a difficulty is very large, cost is very high.
Current mark super expressway display text method existent defect following points:
One, workload is large, and efficiency is low.Display text mark need to be considered the display text gland situation under 10,000,20,000,40,000,80,000,160,000 these different display levels simultaneously, the position of display text under display level of every adjustment will affect this display text in the layout of other display levels simultaneously.In the situation that increasing every year and revising a large amount of super expressway, display text mark and the work of adjusting meeting consume a large amount of manpower and materials.
Two, repeated multiple times adjustment causes claim for eot.Display text mark is the link after relatively leaning in electronic chart production technology.In electronic chart production run, due to factors such as road actual conditions in job error, operation process change, inevitably need to repeatedly revise and regulate shape and the attribute information of road, this just causes and need to repeatedly carry out label character and adjusting work.
Three, be difficult to mark high-grade word how as far as possible.The artificial main method of adjusting display text is that the alternative word that program pre-service is generated is upgraded, if the text point that original pre-service generates is put unreasonable, to be difficult to more label character to higher level, this will cause final map products when convergent-divergent, certain road under certain grade very on a large scale in there is no link name word.
Four, easily make mistakes.Manually carrying out display text adjustment is the work that part is very easily made mistakes, and in operation process, need to repeatedly carry out the inspection of display text gland, and the gland mistake of finding is modified, and guarantees that all grades do not exist gland phenomenon.
Summary of the invention
Based on more than, the object of technical solution of the present invention is to provide a kind of method that electronic map road display text is marked and device, can avoid manual work, the mark work that completes electronic chart display text settling at one go, and guarantee not gland of display text.
The invention provides a kind of method that electronic map road display text is marked, described method comprises:
Obtain the electronic chart under the first display level;
On the first road of display text, create the first word buffer zone need to mark;
Obtain the existing display text that is positioned at described the first word buffer zone on described electronic chart, calculate the viewing area of described existing display text, the viewing area of removing described existing display text in described the first word buffer zone, obtains the second word buffer zone;
Obtain the 3rd word buffer zone creating on second road that need to mark display text, described the 3rd word buffer zone and described the second word buffer zone have overlapping region, in described the second word buffer zone, remove described overlapping region, obtain the label character region of described the first road under the first display level.
Preferably, method described above, after obtaining the step of the electronic chart under the first display level, described method also comprises:
On the described electronic chart of described the first display level, create coordinate grid;
Wherein saidly on need to marking the first road of display text, create in the step of the first word buffer zone, described the first word buffer zone is created in a wherein grid of described coordinate grid.
Preferably, method described above, the step that creates the first word buffer zone comprises:
Centered by every bit on described the first road, be created as the reference area of first size; Wherein said first size is according to needing the size that marks word to set under described the first display level;
The reference area that combination creates according to every bit, forms described the first word buffer zone that global shape is corresponding with tendency and described the first road.
Preferably, method described above, the step of calculating the viewing area of described existing display text specifically comprises:
According to title length and the icon size of described existing display text, calculate the housing region of described existing display text;
Along the every bit on the housing region of described existing display text, be created as the reference area of described first size;
Combine the reference area creating according to the every bit on the housing region of described existing display text, form the viewing area of described existing display text.
Preferably, method described above, described method also comprises:
Obtain successively the label character region of described the first road under other display levels, wherein said other display levels comprise the second display level that at least one is different from described the first display level.
Preferably, method described above, also comprises:
Computing is intersected in label character region under each display level, obtain the 4th word buffer zone;
Calculating is in described the 4th word buffer zone, viewing area and described the 3rd word buffer zone distance position farthest with described existing display text, by described set positions, be the labeling position of described the first road display text under described the first display level, wherein said the first display level is the highest display level.
The present invention also provides a kind of device that electronic map road display text is marked, and described device comprises:
Extraction module, for obtaining the electronic chart under the first display level;
Word buffer zone generation module, for creating the first word buffer zone need to mark on the first road of display text;
The first analysis module, for obtaining the existing display text that is positioned at described the first word buffer zone on described electronic chart, calculate the viewing area of described existing display text, the viewing area of removing described existing display text in described the first word buffer zone, obtains the second word buffer zone;
The second analysis module, for obtaining the 3rd word buffer zone creating on second road that need to mark display text, described the 3rd word buffer zone and described the second word buffer zone have overlapping region, in described the second word buffer zone, remove described overlapping region, obtain the label character region of described the first road under the first display level.
Preferably, device described above, also comprises:
Graticule mesh is cut apart module, for the described electronic chart at described the first display level, creates coordinate grid; Wherein said while creating the first word buffer zone on need to marking the first road of display text, described the first word buffer zone is created in a wherein grid of described coordinate grid.
Preferably, device described above, described word buffer zone generation module specifically comprises:
First generates submodule, centered by the every bit on described the first road, is created as the reference area of first size; Wherein said first size is according to needing the size that marks word to set under described the first display level;
Second generates submodule, for combining the reference area creating according to every bit, forms described the first word buffer zone that global shape is corresponding with tendency and described the first road.
Preferably, device described above, described the first analysis module specifically comprises:
First analyzes submodule, for according to title length and the icon size of described existing display text, calculates the housing region of described existing display text;
Second analyzes submodule, for the every bit on the housing region along described existing display text, is created as the reference area of described first size;
The 3rd analyzes submodule, for combining the reference area creating according to the every bit on the housing region of described existing display text, forms the viewing area of described existing display text.
Preferably, device described above, described device also comprises by described extraction module, described word buffer zone, described the first analysis module and described the second analysis module and obtains and obtain successively the label character region of described the first road under other display levels, and wherein said other display levels comprise the second display level that at least one is different from described the first display level.
Preferably, device described above, described device also comprises word generation module, for: computing is intersected in the label character region under each display level, obtain the 4th word buffer zone; Calculating is in described the 4th word buffer zone, viewing area and described the 3rd word buffer zone distance position farthest with described existing display text, by described set positions, be the labeling position of described the first road display text under described the first display level, wherein said the first display level is the highest display level.
At least one in specific embodiment of the invention technique scheme has following beneficial effect:
Adopt described method and apparatus, can replace the work of artificial adjustment electronic map road subscript explanatory notes word, the mark work that completes super expressway display text settling at one go, and guarantee not gland of display text, and display text is mentioned to the high grade of trying one's best;
In addition,, by creating coordinate grid, can guarantee to there will not be the word uniform layout that marks on word road to be marked and dredge and overstocked problem.
Accompanying drawing explanation
Fig. 1 represents the process flow diagram of the method for the invention;
Fig. 2 represents to adopt a kind of embodiment process flow diagram of method described in the specific embodiment of the invention;
The another kind of embodiment process flow diagram of method described in Fig. 3 expression employing specific embodiment of the invention;
Fig. 4 represents the structural representation installing described in the specific embodiment of the invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
As shown in Figure 1, method electronic map road display text being marked described in the specific embodiment of the invention, comprising:
Step S110, obtains the electronic chart under the first display level;
Step S120, creates the first word buffer zone need to mark on the first road of display text;
Step S130, obtain the existing display text that is positioned at described the first word buffer zone on described electronic chart, calculate the viewing area of described existing display text, the viewing area of removing described existing display text in described the first word buffer zone, obtains the second word buffer zone;
Step S140, obtain the 3rd word buffer zone creating on second road that need to mark display text, described the 3rd word buffer zone and described the second word buffer zone have overlapping region, in described the second word buffer zone, remove described overlapping region, obtain the label character region of described the first road under the first display level.
By said method, can replace the work of artificial adjustment electronic map road subscript explanatory notes word, the mark work that completes super expressway display text settling at one go, and guarantee not gland of display text.
Preferably, while adopting specific embodiment of the invention said method, on the electronic chart of place display level, create coordinate grid, make to need to mark the link creation first word buffer zone of word time, coordinate grid based on created creates, and also in step S120, described the first word buffer zone is created in a wherein grid of described coordinate grid.
To the process of method described in the specific embodiment of the invention be described in detail below.As shown in Figure 2, described in the employing specific embodiment of the invention, the flow process of method specifically comprises the following steps:
S210, obtains the electronic chart under the first display level; The display level that it will be understood by those skilled in the art that common electronic chart comprises 10,000,20,000,40,000,80,000 and 160,000 these five kinds.Adopt this step, under a kind of display level, open electronic chart therein, preferably, from the highest display level 160,000, start to process.
S220, obtains new added road or modification road on electronic chart; Described new added road represents the road data that need to mark display text newly increasing after upper version electronic map data issue; Described modification road represents to revise shape after upper version electronic map data issue or attribute changes, and causes again marking the road data of display text.
S230 creates coordinate grid on the electronic chart of the first display level, so that the first road is cut apart; This first road is also by the determined newly-increased or modification road of step S220.The display level of opening according to electronic chart is different, and the sizing grid of the corresponding coordinate grid creating is not identical yet.
S240, under the first display level, to first link creation the first word buffer zone B1 in each grid in coordinate grid; Because the sizing grid of the coordinate grid under different display levels is different, so may have many different roads in each grid under each display level.
Under this step, take the first road as example, the step that creates the first word buffer zone B1 specifically comprises:
Centered by every bit on described the first road, be created as the reference area of first size; Wherein said first size is according to needing the size that marks word to set under described the first display level, this reference area is specifically as follows rectangle, as long, is L, and wide is W;
The reference area that combination creates according to every bit, forms global shape and the tendency described first word buffer zone B1 corresponding with described the first road.
For improving the mark efficiency of display text, preferably, can, only centered by each turning point of the first road, be created as the reference area of first size, the reference area that combination is created according to each turning point, forms global shape and the tendency first word buffer zone B1 corresponding with described the first road.
It will be understood by those skilled in the art that each road that need to mark word is because shape is different, link name length is different, the first word buffer zone B1 of formation is also different.
S250, obtains the existing display text that is positioned at described the first word buffer zone B1 on described electronic chart, the viewing area of calculating described existing display text;
Wherein said existing display text refers to original existing display text in electronic chart, by space, calculate all existing display text that can obtain having with the first word buffer zone B1 of the first road overlapping relation, according to title length and the icon sizes of each existing display text, can calculate rectangle or the polygonal housing region of each existing display text.And by space calculation step, can obtain in each grid of coordinate grid and need to mark with each all existing display text set T{T1 that the first word buffer zone B1 of word road intersects, T2 ..., Tn}.
By below, the step detailed process of calculating the viewing area of described existing display text comprises:
According to title length and the icon size of described existing display text, calculate the housing region of described existing display text;
Along the every bit on the housing region of described existing display text, be created as the reference area of described first size; Reference area size when this reference area also creates with the first word buffer zone B1 is corresponding;
Combine the reference area creating according to the every bit on the housing region of described existing display text, form the viewing area of described existing display text.
Therefore,, in each grid, the viewing area of all existing display text set T forms one and surrounds larger rectangle or the polygonal region of display text set housing.
S260, the viewing area of removing described existing display text in described the first word buffer zone B1, obtains the second word buffer zone B2;
S270, obtain the 3rd word buffer zone creating on second road that need to mark display text, described the 3rd word buffer zone and described the second word buffering B2 district have overlapping region, in described the second word buffer zone B2, remove described overlapping region, obtain the label character region B3 of described the first road under the first display level;
While adopting described in the specific embodiment of the invention method, in each grid due to created coordinate grid, there are many different roads, while creating the word buffer zone of other roads that need to mark word (the second road) according to said method, may there is overlapped part in the word buffer zone creating in the buffer zone of those roads and the first road, therefore must adopt this step S270, in the second word buffer zone B2 of the first road, remove overlapping region, obtain the label character region B3 of the first road under the first display level.
It will be appreciated by those skilled in the art that, described the second road is not limited to a road, because around the first road, except the first road need to mark display text, may also can exist and be not limited to other roads and need to mark display text, utilizing above-mentioned steps S210 to S270, calculating while obtaining the label character region B3 of the first road under the first display level, also can utilize created graticule mesh to calculate simultaneously and obtain the label character region B3 that other need to mark display text road.
Yet, in step S270, in described the second word buffer zone B2, remove and when other need to mark the overlapping region between the buffer zone of display text road, exist other buffer zones that need to mark display text road to cover the situation of the second word buffer zone B2 completely, make in this computation process, the label character region B3 of the first road under the first display level is zero.
Therefore, further, described method also comprises step:
S280, whether the label character region B3 that judgement is this time calculated based on the first road is zero; If the determination result is YES, perform step S320, if the determination result is NO, perform step S290;
S290, obtains the label character region of described the first road under all display levels successively.Also need to calculate the label character region B3 of the first road under the first display level, also need to calculate the label character region of the first road under other display levels, wherein said other display levels comprise the second display level that at least one is different from described the first display level.Common all display levels comprise 10,000,20,000,40,000,80,000 and 160,000 these five kinds;
S310, intersects computing to the label character region B3 under each display level, obtains the 4th word buffer zone B4;
S320, calculating is in described the 4th word buffer zone B4, viewing area and described the 3rd word buffer zone distance position P farthest with described existing display text, described position P is set as to the labeling position of described the first road display text under described the first display level, wherein said the first display level is the highest display level, is also 160,000 display level.It will be appreciated by those skilled in the art that, label character position under common different display level on same road is identical, when determining under the highest display level, the placement location of word and other display texts not mutually gland, with road junction can gland, with existing display text icon not mutually during gland, conventionally under low display level, can there is not above-mentioned gland phenomenon yet, therefore by determining the labeling position of display text under above-mentioned 160,000 grades, can determine the label character position of other lower grades.
S330, when the label character region B3 this time calculating based on the first road is zero, give up this time determining the first road label character region B3, first determine that other need to mark the label character region of display text the second road, and the label character region of determine the second road is set as to the viewing area of existing display text, return to execution step S210, recalculate the label character region B3 of the first road.
According to above-mentioned steps S330, this time calculate and first determine that other need to mark the label character region of display text the second road, in the next computation process of the first road display text, be set as the viewing area of existing display text, dwindle the scope of other road word buffer zones of determine, for calculating next time, further determine that the label character region B3 of the first road provides possibility.
In addition, adopt the repeatedly computing to step S280 through step S210 of method shown in Fig. 2, there is the possibility that still can not obtain the first road label character region B3, also be in actual application, once-through operation process is determined its label character region of word B3 for the road of all words to be marked of electronic chart, through repeatedly computing, under the display level based on current, can have the possibility that some roads cannot be determined label character region.Based on this problem, as shown in Figure 3, on the other hand, after repeatedly performing step S210 and S270, described method also comprises step to the method for the invention:
S410, the label character region of this time calculating based on the first road is zero;
S420, judges whether this computing has other second roads that need to mark display text to determine label character region, and also whether judgement has this time marked word to other roads, if the determination result is YES, perform step S430, if the determination result is NO, perform step S440;
S430, is set as the label character region of determine the second road the viewing area of existing display text, and returns to execution step S210;
S440, further judges that whether current display level has been minimum display level, when not for minimum display level (as 10,000), performs step S450; When being minimum display level, perform step S460;
S450, reduces display level, returns to step S210, take new display level as the first display level, reduces the label character that carries out lower display level, until the display level of current mark is while being minimum display level, the label character process of the first road finishes;
S460, mark process finishes.
The present invention also provides a kind of device that electronic map road display text is marked on the other hand, and as shown in Figure 4, described device 300 comprises:
Extraction module, for obtaining the electronic chart 400 under the first display level;
Word buffer zone generation module, for creating the first word buffer zone need to mark on the first road of display text;
The first analysis module, for obtaining the existing display text that is positioned at described the first word buffer zone on described electronic chart, calculate the viewing area of described existing display text, the viewing area of removing described existing display text in described the first word buffer zone, obtains the second word buffer zone;
The second analysis module, for obtaining the 3rd word buffer zone creating on second road that need to mark display text, described the 3rd word buffer zone and described the second word buffer zone have overlapping region, in described the second word buffer zone, remove described overlapping region, obtain the label character region of described the first road under the first display level.
Preferably, described device also comprises that graticule mesh cuts apart module, for the described electronic chart at described the first display level, creates coordinate grid; Wherein said while creating the first word buffer zone on need to marking the first road of display text, described the first word buffer zone is created in a wherein grid of described coordinate grid.
In addition, described word buffer zone generation module specifically comprises:
First generates submodule, centered by the every bit on described the first road, is created as the reference area of first size; Wherein said first size is according to needing the size that marks word to set under described the first display level;
Second generates submodule, for combining the reference area creating according to every bit, forms described the first word buffer zone that global shape is corresponding with tendency and described the first road.
Described the first analysis module specifically comprises:
First analyzes submodule, for according to title length and the icon size of described existing display text, calculates the housing region of described existing display text;
Second analyzes submodule, for the every bit on the housing region along described existing display text, is created as the reference area of described first size;
The 3rd analyzes submodule, for combining the reference area creating according to the every bit on the housing region of described existing display text, forms the viewing area of described existing display text.
On the other hand, described device also comprises by described extraction module, described word buffer zone, described the first analysis module and described the second analysis module and obtains and obtain successively the label character region of described the first road under other display levels, and wherein said other display levels comprise the second display level that at least one is different from described the first display level.
On the other hand, described device also comprises word generation module, for: computing is intersected in the label character region under each display level, obtain the 4th word buffer zone; Calculating is in described the 4th word buffer zone, viewing area and described the 3rd word buffer zone distance position farthest with described existing display text, by described set positions, be the labeling position of described the first road display text under described the first display level, wherein said the first display level is the highest display level.
Method and apparatus described in the employing specific embodiment of the invention, can replace the work of artificial adjustment electronic map road subscript explanatory notes word, the mark work that completes super expressway display text settling at one go, and guarantee not gland of display text, and display text is mentioned to the high grade of trying one's best.
In addition, method and apparatus described in the specific embodiment of the invention, by creating coordinate grid, can guarantee to there will not be the word uniform layout that marks on word road to be marked and dredge and overstocked problem.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. method electronic map road display text being marked, is characterized in that, described method comprises:
Obtain the electronic chart under the first display level;
On the first road of display text, create the first word buffer zone need to mark;
Obtain the existing display text that is positioned at described the first word buffer zone on described electronic chart, calculate the viewing area of described existing display text, the viewing area of removing described existing display text in described the first word buffer zone, obtains the second word buffer zone;
Obtain the 3rd word buffer zone creating on second road that need to mark display text, described the 3rd word buffer zone and described the second word buffer zone have overlapping region, in described the second word buffer zone, remove described overlapping region, obtain the label character region of described the first road under the first display level.
2. the method for claim 1, is characterized in that, after obtaining the step of the electronic chart under the first display level, described method also comprises:
On the described electronic chart of described the first display level, create coordinate grid;
Wherein saidly on need to marking the first road of display text, create in the step of the first word buffer zone, described the first word buffer zone is created in a wherein grid of described coordinate grid.
3. method as claimed in claim 2, is characterized in that, the step that creates the first word buffer zone comprises:
Centered by every bit on described the first road, be created as the reference area of first size; Wherein said first size is according to needing the size that marks word to set under described the first display level;
The reference area that combination creates according to every bit, forms described the first word buffer zone that global shape is corresponding with tendency and described the first road.
4. method as claimed in claim 3, is characterized in that, the step of calculating the viewing area of described existing display text specifically comprises:
According to title length and the icon size of described existing display text, calculate the housing region of described existing display text;
Along the every bit on the housing region of described existing display text, be created as the reference area of described first size;
Combine the reference area creating according to the every bit on the housing region of described existing display text, form the viewing area of described existing display text.
5. the method as described in claim 1 to 4 any one, is characterized in that, described method also comprises:
Obtain successively the label character region of described the first road under other display levels, wherein said other display levels comprise the second display level that at least one is different from described the first display level.
6. method as claimed in claim 5, is characterized in that, described method also comprises:
Computing is intersected in label character region under each display level, obtain the 4th word buffer zone;
Calculating is in described the 4th word buffer zone, viewing area and described the 3rd word buffer zone distance position farthest with described existing display text, by described set positions, be the labeling position of described the first road display text under described the first display level, wherein said the first display level is the highest display level.
7. device electronic map road display text being marked, is characterized in that, described device comprises:
Extraction module, for obtaining the electronic chart under the first display level;
Word buffer zone generation module, for creating the first word buffer zone need to mark on the first road of display text;
The first analysis module, for obtaining the existing display text that is positioned at described the first word buffer zone on described electronic chart, calculate the viewing area of described existing display text, the viewing area of removing described existing display text in described the first word buffer zone, obtains the second word buffer zone;
The second analysis module, for obtaining the 3rd word buffer zone creating on second road that need to mark display text, described the 3rd word buffer zone and described the second word buffer zone have overlapping region, in described the second word buffer zone, remove described overlapping region, obtain the label character region of described the first road under the first display level.
8. device as claimed in claim 7, is characterized in that, described device also comprises:
Graticule mesh is cut apart module, for the described electronic chart at described the first display level, creates coordinate grid; Wherein said while creating the first word buffer zone on need to marking the first road of display text, described the first word buffer zone is created in a wherein grid of described coordinate grid.
9. device as claimed in claim 8, is characterized in that, described word buffer zone generation module specifically comprises:
First generates submodule, centered by the every bit on described the first road, is created as the reference area of first size; Wherein said first size is according to needing the size that marks word to set under described the first display level;
Second generates submodule, for combining the reference area creating according to every bit, forms described the first word buffer zone that global shape is corresponding with tendency and described the first road.
10. device as claimed in claim 9, is characterized in that, described the first analysis module specifically comprises:
First analyzes submodule, for according to title length and the icon size of described existing display text, calculates the housing region of described existing display text;
Second analyzes submodule, for the every bit on the housing region along described existing display text, is created as the reference area of described first size;
The 3rd analyzes submodule, for combining the reference area creating according to the every bit on the housing region of described existing display text, forms the viewing area of described existing display text.
11. devices as described in claim 7 to 10 any one, it is characterized in that, described device also comprises by described extraction module, described word buffer zone, described the first analysis module and described the second analysis module and obtains and obtain successively the label character region of described the first road under other display levels, and wherein said other display levels comprise the second display level that at least one is different from described the first display level.
12. devices as claimed in claim 11, is characterized in that, described device also comprises word generation module, for: computing is intersected in the label character region under each display level, obtain the 4th word buffer zone; Calculating is in described the 4th word buffer zone, viewing area and described the 3rd word buffer zone distance position farthest with described existing display text, by described set positions, be the labeling position of described the first road display text under described the first display level, wherein said the first display level is the highest display level.
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| CN201310162882.7A CN104143288B (en) | 2013-05-06 | 2013-05-06 | The method and device that electronic map road display word is labeled |
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| CN201310162882.7A CN104143288B (en) | 2013-05-06 | 2013-05-06 | The method and device that electronic map road display word is labeled |
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| Publication number | Priority date | Publication date | Assignee | Title |
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