CN106227853A - One map generalization method electronically and processing method - Google Patents
One map generalization method electronically and processing method Download PDFInfo
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- CN106227853A CN106227853A CN201610607880.8A CN201610607880A CN106227853A CN 106227853 A CN106227853 A CN 106227853A CN 201610607880 A CN201610607880 A CN 201610607880A CN 106227853 A CN106227853 A CN 106227853A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T11/00—2D [Two Dimensional] image generation
- G06T11/60—Editing figures and text; Combining figures or text
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/29—Geographical information databases
Abstract
The open one map generalization method electronically of the present invention and processing method, generation method includes: obtains the map of each predeterminable area and is stored as map picture, and number M based on default scale grade and scaling multiple corresponding to each scale grade, each map picture is zoomed in and out, obtains M scaling pictures of each map picture；Each map picture is divided into multiple sub-pictures, and determines each sub-pictures figure coordinate in affiliated picture；Each sub-pictures is divided into multiple units picture, and determines each unit picture first coordinate in affiliated sub-pictures；Obtain the solid data in each predeterminable area, based on the entity location information carried in solid data, determine the corresponding relation of entity location information and unit's coordinate, to determine the first picture belonging to each solid data；M scaling pictures based on each map picture, each sub-pictures figure coordinate, each unit's picture first coordinate in affiliated sub-pictures and the first picture belonging to each solid data in affiliated picture, generates electronic chart.
Description
Technical field
The present invention relates to field of computer technology, be specifically related to one map generalization method electronically and processing method.
Background technology
Electronic chart, is to utilize computer technology, the map storing in a digital manner and consulting.Electronic chart storage information
Method generally use vector mode image storage, map can amplify continuously, reduces and rotate in proportion and not affect display effect,
Existing electronic chart software generally uses GIS-Geographic Information System (Geographic Information System, GIS) and deposits
Storage and transmission map datum.
At present, various conventional electronic charts depend on powerful GIS, use view data and the entity of vector mode
Data carry out storing and show map, and its technology is the most ripe.But, in the face of the intelligence of flourish mobile Internet is whole
End, the particularly application of handheld terminal and application development, existing electronic chart there is also following defect:
1, owing to electronic chart relies on GIS and the view data of huge basic data, i.e. vector mode and solid data,
Therefore develop and safeguard that electronic chart needs the biggest input.Little company develops mobile phone based on geographical position application and must use
The api interface that major company's electronic chart provides, by bigger restriction.
2, when user searches certain class entity according to certain geographical position relation, owing to solid data is deposited according to vector mode
Storage, existing electronic chart must calculate or compare each qualified entity, despite the lookup algorithm that many is outstanding, but
Or it is inefficient.
3, existing electronic chart to mobile terminal, particularly mobile phone, it is impossible to meet one-handed performance etc. demand, the most singly
Hands carries out the scaling etc. of map.
Summary of the invention
In view of the above problems, the present invention proposes and overcomes the problems referred to above or solve the one of the problems referred to above at least in part
Map generalization method electronically and processing method.
First aspect, the present invention proposes one map generalization method electronically, including:
Obtain the map of each predeterminable area and be stored as map picture, and number M based on default scale grade and
The scaling multiple that each scale grade is corresponding, zooms in and out each map picture, obtains M scaling pictures of each map picture；
Each map picture is divided into multiple sub-pictures, and determines each sub-pictures figure coordinate in affiliated picture；Described
Figure coordinate is for indicating sub-pictures position in picture belonging to this sub-pictures；
Each sub-pictures is divided into multiple units picture, and determines each unit picture first coordinate in affiliated sub-pictures；Described
Unit's coordinate is for indicating unit picture position in sub-pictures belonging to this yuan of picture；
Obtain the solid data in each predeterminable area, based on the entity location information carried in solid data, determine described
Entity location information and the corresponding relation of unit's coordinate, to determine the first picture belonging to each solid data；
Figure coordinate in affiliated picture of M scaling pictures based on described each map picture, described each sub-pictures, described
The each unit's picture first coordinate in affiliated sub-pictures and the first picture belonging to described each solid data, generate electronic chart.
Optionally, after described generation electronic chart, also include:
Scaling sensor label is set within showing the predeterminable area of display screen of described electronic chart, is used for sensing contact
Touch-control or non-contact type touch control, with the electronic chart that instruction scaling is currently displaying.
Optionally, after described generation electronic chart, also include:
Translation sensor label is set within showing the predeterminable area of display screen of described electronic chart, is used for sensing contact
Touch-control or non-contact type touch control, with the electronic chart that instruction translation is currently displaying.
Optionally, after described generation electronic chart, also include:
Lookup sensor label is set within showing the predeterminable area of display screen of described electronic chart, is used for sensing contact
Touch-control or non-contact type touch control, receive look-up command with ejection operation interface, carry target entity number in described look-up command
According to, described look-up command searches described target entity data for instruction in currently displaying map.
Optionally, described based on the entity location information carried in solid data, determine described entity location information and unit
The corresponding relation of coordinate, including:
If the entity location information carried in described solid data is latitude and longitude information, then based on default longitude and latitude and unit
The transformational rule of coordinate, is converted to described latitude and longitude information unit's coordinate, determines first coordinate that described entity location information is corresponding
The first coordinate changed for described latitude and longitude information.
Second aspect, the present invention also proposes the processing method of a kind of electronic chart, including:
Receive scaling instruction after, based on described scaling instruction instruction scalable manner, by currently displaying electronically
Figure one scale grade of scaling；
Receive translation instruction after, based on described translation instruction instruction translation direction, by currently displaying electronically
Figure translation predeterminable range；Described predeterminable range is the integral multiple of the spacing of first coordinate of adjacent unit picture；
After receiving query statement, based on the target entity data carried in described look-up command, currently displaying
Electronic chart is searched described target entity data, and lookup result is shown in described currently displaying electronic chart
Show.
Optionally, described lookup result is shown in described currently displaying electronic chart, including:
If finding described target entity data, then in described currently displaying electronic chart, mark out described target real
First coordinate of volume data；
If not finding described target entity data, then the default viewing area in described currently displaying electronic chart
Showing information in territory, this information does not find described target entity data for instruction.
Optionally, described after receiving scaling instruction, scalable manner based on described scaling instruction instruction, will currently show
Electronic chart one the scale grade of scaling shown, including:
Detecting that display screen is long pressed or double-clicks, it is determined that receive amplification instruction, by currently displaying electronic chart
Amplify a scale grade；
Or,
After scaling sensor label senses touch-control, scalable manner based on the instruction of described scaling sensor label, will be current
Electronic chart one scale grade of scaling of display；Described scaling sensor label is arranged on the display showing described electronic chart
In the predeterminable area of screen.
Optionally, described after receiving translation instruction, translation direction based on described translation instruction instruction, will currently show
The electronic chart translation predeterminable range shown, including:
Detecting that display screen is by slide, it is determined that receive translation instruction, indicate based on described slide
Translation direction, by currently displaying electronic chart translation predeterminable range；
Or,
After translation sensor label senses touch-control, translation direction based on the instruction of described translation sensor label, will be current
The electronic chart translation predeterminable range of display；Described translation sensor label is arranged on display screen pre-showing described electronic chart
If in region.
Optionally, also include:
Obtain the solid data in each predeterminable area, based on the provider location carried in solid data more fresh information, update
Described solid data and the corresponding relation of unit's coordinate, to update the first picture belonging to each solid data.
Compared to prior art, the map generalization method electronically of present invention proposition and processing method, by entering map
Row secondary divides, and with unit's picture for minimum statistics unit, and determines first coordinate of each unit picture, thus eliminates the reliance on huge
GIS and scale vector data, general mobile phone application developer can be independent of the API of major company and develop location-based clothes
Business；Further, it is provided that more friendly man-machine interaction mode, one hand can complete translation, scaling and major part lookup；Enter again
One step ground, all solid datas no longer store with approach vector, but record unit's picture belonging to it with simple data form, greatly
Big raising condition query speed.
Accompanying drawing explanation
The one map generalization method flow diagram electronically that Fig. 1 provides for first embodiment of the invention；
The process flow figure of a kind of electronic chart that Fig. 2 provides for second embodiment of the invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is explicitly described, it is clear that described embodiment is the present invention
A part of embodiment rather than whole embodiments.
As it is shown in figure 1, the open one map generalization method electronically of the present embodiment, it may include following steps 101～105:
101, obtain the map of each predeterminable area and be stored as map picture, and number based on default scale grade
M and scaling multiple corresponding to each scale grade, zoom in and out each map picture, obtain M scaling figure of each map picture
Sheet；
In the present embodiment, predeterminable area, can be such as with the entitled dividing unit in city divide region, it is also possible to for
Geographic range is the region that dividing unit divides, naturally it is also possible to for the region otherwise divided, the present embodiment is the most detailed
State.
102, each map picture is divided into multiple sub-pictures, and determines each sub-pictures figure coordinate in affiliated picture；
Described figure coordinate is for indicating sub-pictures position in picture belonging to this sub-pictures；
In the present embodiment, each sub-pictures relative position in map picture, indicate with figure coordinate.
103, each sub-pictures is divided into multiple units picture, and determines each unit picture first coordinate in affiliated sub-pictures；
Described unit coordinate is for indicating unit picture position in sub-pictures belonging to this yuan of picture.
104, obtain the solid data in each predeterminable area, based on the entity location information carried in solid data, determine
Described entity location information and the corresponding relation of unit's coordinate, to determine the first picture belonging to each solid data.
105, figure coordinate in affiliated picture of M scaling pictures based on described each map picture, described each sub-pictures,
The described each unit's picture first coordinate in affiliated sub-pictures and the first picture belonging to described each solid data, generate electronically
Figure.
The map generalization method electronically that the present embodiment proposes, by carrying out secondary division by map, with unit's picture for
Little statistic unit, and determine first coordinate of each unit picture, thus eliminate the reliance on huge GIS and scale vector data, typically
Mobile phone application developer can be independent of the API of major company and develop location Based service.
In a specific example, after generating electronic chart described in step 105, may also include the step not shown in Fig. 1
Rapid 106:
106, scaling sensor label is set within showing the predeterminable area of display screen of described electronic chart, connects for sensing
Touch touch-control or non-contact type touch control, with the electronic chart that instruction scaling is currently displaying.
In a specific example, after generating electronic chart described in step 105, may also include the step not shown in Fig. 1
Rapid 107:
107, translation sensor label is set within showing the predeterminable area of display screen of described electronic chart, connects for sensing
Touch touch-control or non-contact type touch control, with the electronic chart that instruction translation is currently displaying.
In a specific example, after generating electronic chart described in step 105, may also include the step not shown in Fig. 1
Rapid 108:
108, lookup sensor label is set within showing the predeterminable area of display screen of described electronic chart, connects for sensing
Touch touch-control or non-contact type touch control, receive look-up command with ejection operation interface, carries target real in described look-up command
Volume data, described look-up command searches described target entity data for instruction in currently displaying map.
The map generalization method electronically that the present embodiment proposes, further, it is provided that more friendly man-machine interaction mode,
One hand can complete translation, scaling and major part and search.
In a specific example, based on the entity location information carried in solid data described in step 104, determine
Described entity location information and the corresponding relation of unit's coordinate, if particularly as follows: the entity location information carried in described solid data
For latitude and longitude information, then transformational rule based on default longitude and latitude with unit's coordinate, described latitude and longitude information is converted to unit's seat
Mark, determines first coordinate that first coordinate is the conversion of described latitude and longitude information that described entity location information is corresponding.
The map generalization method electronically that the present embodiment proposes, yet further, all solid datas no longer use vector side
Formula stores, but records unit's picture belonging to it with simple data form, is greatly improved condition query speed.
For the ease of the understanding to present invention, specific embodiment, by as a example by Beijing, explains in detail and how to generate electronics
Map, and part use scene, detailed process following 1～3:
1, centered by Tian An-men, intercept the map at 27 × 27 kilometers (basic bedding five rings), save as picture, be defined as P
(1)；
2, P (1) is divided into 81 × 81 sub-pictures, " unit's lattice " can be become.With the ratios of 3 times, P (1) is divided into 5
Scale grade, each sub-pictures can be expressed as P (5, the sub-pictures P (5, (0,0)) belonging to (i, j)), such as Tian An-men, Dongdan
Affiliated sub-pictures is P (5, (11,0)), and each sub-pictures is the picture of 333 meters × 333 meters；
3, the sub-pictures of a high scale grade comprises the sub-pictures of 9 next scale grades, as belonging to Tian An-men
4 grades of sub-pictures P (4, (0,0)) comprise P (5, (0,0)), P (5, (1,0)), P (5, (1,1)), P (5, (0,1)), P (5, (-1
1)), P (5, (-1,0)), P (5, (-1 ,-1)), P (5, (0 ,-1)), P (5, (1 ,-1)), 95 grades of sub-pictures altogether；3 grades of subgraphs
Sheet P (3, (0,0)) comprises P (4, (0,0)), P (4, (3,0)) ... P (4, (3 ,-3)), waits 94 grades of sub-pictures.
As in figure 2 it is shown, the present embodiment provides the processing method of a kind of electronic chart, the life of the electronic chart that the method relates to
One-tenth mode can generate based on above-mentioned map generalization embodiment of the method electronically, processing method disclosed in the present embodiment, it may include
Following steps 201～203:
201, after receiving scaling instruction, scalable manner based on described scaling instruction instruction, by currently displaying electricity
Sub-map one scale grade of scaling；
202, after receiving translation instruction, translation direction based on described translation instruction instruction, by currently displaying electricity
Sub-map translation predeterminable range；Described predeterminable range is the integral multiple of the spacing of first coordinate of adjacent unit picture；
203, after receiving query statement, based on the target entity data carried in described look-up command, current aobvious
The electronic chart shown is searched described target entity data, and lookup result is carried out in described currently displaying electronic chart
Display.
In a specific example, described in step 203 by lookup result in described currently displaying electronic chart
Show, specific as follows:
If finding described target entity data, then in described currently displaying electronic chart, mark out described target real
First coordinate of volume data；
If not finding described target entity data, then the default viewing area in described currently displaying electronic chart
Showing information in territory, this information does not find described target entity data for instruction.
In a specific example, described in step 201 after receiving scaling instruction, based on described scaling instruction instruction
Scalable manner, by currently displaying electronic chart one scale grade of scaling, specific as follows:
Detecting that display screen is long pressed or double-clicks, it is determined that receive amplification instruction, by currently displaying electronic chart
Amplify a scale grade；
Or,
After scaling sensor label senses touch-control, scalable manner based on the instruction of described scaling sensor label, will be current
Electronic chart one scale grade of scaling of display；Described scaling sensor label is arranged on the display showing described electronic chart
In the predeterminable area of screen.
In a specific example, described in step 202 after receiving translation instruction, based on described translation instruction instruction
Translation direction, by currently displaying electronic chart translation predeterminable range, specific as follows:
Detecting that display screen is by slide, it is determined that receive translation instruction, indicate based on described slide
Translation direction, by currently displaying electronic chart translation predeterminable range；
Or,
After translation sensor label senses touch-control, translation direction based on the instruction of described translation sensor label, will be current
The electronic chart translation predeterminable range of display；Described translation sensor label is arranged on display screen pre-showing described electronic chart
If in region.
In a specific example, described processing method also includes the step 204 not shown in Fig. 2:
204, the solid data in each predeterminable area is obtained, based on the provider location carried in solid data more fresh information,
Update the corresponding relation of described solid data and unit's coordinate, to update the first picture belonging to each solid data.
Compared to prior art, the map generalization method electronically of embodiment of the present invention proposition and processing method, by inciting somebody to action
Map carries out secondary division, with unit's picture for minimum statistics unit, and determines first coordinate of each unit picture, thus eliminates the reliance on Pang
Big GIS and scale vector data, general mobile phone application developer can be independent of the API of major company and develop based on position
Service；Further, it is provided that more friendly man-machine interaction mode, one hand can complete translation, scaling and major part lookup；
Yet further, all solid datas no longer store with approach vector, but record unit's figure belonging to it with simple data form
Sheet, is greatly improved condition query speed.
It is illustrated below: above-mentioned electronic chart is done as follows by the intelligent terminal of touch screen type:
Translation: when finger slides at screen (oblique can also define according to scene) up and down, program receives life
Order, photo current will be replaced by new picture, and rule is: photo current is P (5), or during P (4) scale grade, picture only moves
A dynamic coordinate, as a example by sliding to the left: P (5, (1,1)) left cunning is P (5, (2,1)), P (4, (1,1)) left cunning be P (4, (2,
1)), P (3) scale grade 3 coordinate: P (3, (1,1)) left cunning of then sliding is P (3, (4,1)), and P (2) scale grade is then slided
Dynamic 9 left cunnings of coordinate: P (3, (1,1)) are P (3, (10,1)), and P (1) can not slide (if extending map, slidably 27 seats
Mark).
Scaling.Indentation: at one indentation key of map picture region peripheral hardware, when user clicks on indentation key, photo current is protected
Stay central point, recall upper level picture such as, click on indentation key at P (4, (1,1)), then recall P (3, (1,1)) and replace artwork.
Amplify: when " long press " or " double-click " a certain region in the drawings, in this example figure be divided into 9 regions (in, left, upper left, on, the right side
On, right, bottom right, under, lower-left), then substitute photo current with subordinate's picture in this region, as double-clicked " upper left " of P (3, (1,1))
Region, is output as P (4, (-2,4)).
Opsition dependent searches entity: whether static entities, such as restaurant, or transaction, such as taxi, its position attribution
All with " unit's lattice " record, when application program searches for certain class entity some region of, belonging to being somebody's turn to do of this region all " unit's lattice "
Class entity finds, and i.e. completes search.
Although it will be appreciated by those of skill in the art that embodiments more described herein include being wrapped in other embodiments
Some feature included rather than further feature, but the combination of the feature of different embodiment mean to be in the scope of the present invention it
In and form different embodiments.
It will be understood by those skilled in the art that the various method steps in embodiment can realize with hardware, or with one
The software module run on individual or multiple processor realizes, or realizes with combinations thereof.Those skilled in the art should
Work as understanding, microprocessor or digital signal processor (DSP) can be used in practice to realize according to embodiments of the present invention
The some or all functions of some or all parts.The present invention is also implemented as performing side as described herein
Part or all equipment of method or device program (such as, computer program and computer program).
Although being described in conjunction with the accompanying embodiments of the present invention, but those skilled in the art can be without departing from this
Making various modifications and variations in the case of bright spirit and scope, such amendment and modification each fall within by claims
Within limited range.
Claims (10)
1. a map generalization method electronically, it is characterised in that including:
Obtain the map of each predeterminable area and be stored as map picture, and number M based on default scale grade and respectively than
The scaling multiple that example chi grade is corresponding, zooms in and out each map picture, obtains M scaling pictures of each map picture；
Each map picture is divided into multiple sub-pictures, and determines each sub-pictures figure coordinate in affiliated picture；Described figure is sat
Mark is for indicating sub-pictures position in picture belonging to this sub-pictures；
Each sub-pictures is divided into multiple units picture, and determines each unit picture first coordinate in affiliated sub-pictures；Described unit sits
Mark is for indicating unit picture position in sub-pictures belonging to this yuan of picture；
Obtain the solid data in each predeterminable area, based on the entity location information carried in solid data, determine described entity
Positional information and the corresponding relation of unit's coordinate, to determine the first picture belonging to each solid data；
Figure coordinate in affiliated picture of M scaling pictures based on described each map picture, described each sub-pictures, described each unit
The picture first coordinate in affiliated sub-pictures and the first picture belonging to described each solid data, generate electronic chart.
Method the most according to claim 1, it is characterised in that after described generation electronic chart, also include:
Scaling sensor label is set within showing the predeterminable area of display screen of described electronic chart, is used for sensing contact touch-control
Or non-contact type touch control, with the electronic chart that instruction scaling is currently displaying.
Method the most according to claim 1, it is characterised in that after described generation electronic chart, also include:
Translation sensor label is set within showing the predeterminable area of display screen of described electronic chart, is used for sensing contact touch-control
Or non-contact type touch control, with the electronic chart that instruction translation is currently displaying.
Method the most according to claim 1, it is characterised in that after described generation electronic chart, also include:
Lookup sensor label is set within showing the predeterminable area of display screen of described electronic chart, is used for sensing contact touch-control
Or non-contact type touch control, receive look-up command with ejection operation interface, described look-up command carries target entity data, institute
State look-up command and in currently displaying map, search described target entity data for instruction.
Method the most according to claim 1, it is characterised in that described based on the provider location letter carried in solid data
Breath, determines the corresponding relation of described entity location information and unit's coordinate, including:
If the entity location information carried in described solid data is latitude and longitude information, then based on default longitude and latitude and unit's coordinate
Transformational rule, described latitude and longitude information is converted to unit's coordinate, determines that first coordinate corresponding to described entity location information is institute
State first coordinate of latitude and longitude information conversion.
6. the processing method of an electronic chart, it is characterised in that including:
After receiving scaling instruction, scalable manner based on described scaling instruction instruction, by currently displaying electronic chart contracting
Put a scale grade；
After receiving translation instruction, translation direction based on described translation instruction instruction, currently displaying electronic chart is put down
Move predeterminable range；Described predeterminable range is the integral multiple of the spacing of first coordinate of adjacent unit picture；
After receiving query statement, based on the target entity data carried in described look-up command, at currently displaying electronics
Map is searched described target entity data, and lookup result is shown in described currently displaying electronic chart.
Method the most according to claim 6, it is characterised in that described by lookup result described currently displaying electronically
Figure shows, including:
If finding described target entity data, then in described currently displaying electronic chart, mark out described target entity number
According to first coordinate；
If not finding described target entity data, then in the default viewing area in described currently displaying electronic chart
Display information, this information does not find described target entity data for instruction.
Method the most according to claim 6, it is characterised in that described after receiving scaling instruction, based on described scaling
The scalable manner of instruction instruction, scales a scale grade by currently displaying electronic chart, including:
Detecting that display screen is long pressed or double-clicks, it is determined that receive amplification instruction, currently displaying electronic chart is being amplified
One scale grade；
Or,
After scaling sensor label senses touch-control, scalable manner based on the instruction of described scaling sensor label, by currently displaying
Electronic chart scaling one scale grade；Described scaling sensor label is arranged on the display screen showing described electronic chart
In predeterminable area.
Method the most according to claim 6, it is characterised in that described after receiving translation instruction, based on described translation
The translation direction of instruction instruction, translates predeterminable range by currently displaying electronic chart, including:
Detecting that display screen is by slide, it is determined that receive translation instruction, the translation indicated based on described slide
Direction, by currently displaying electronic chart translation predeterminable range；
Or,
After translation sensor label senses touch-control, translation direction based on the instruction of described translation sensor label, by currently displaying
Electronic chart translation predeterminable range；Described translation sensor label is arranged on the preset areas of the display screen showing described electronic chart
In territory.
Method the most according to claim 6, it is characterised in that also include:
Obtain the solid data in each predeterminable area, based on the provider location carried in solid data more fresh information, update described
Solid data and the corresponding relation of unit's coordinate, to update the first picture belonging to each solid data.
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| CN106847068A (en) * | 2017-01-22 | 2017-06-13 | 腾云天宇科技（北京）有限公司 | A kind of map conversion method, device and computing device |
| CN107203634A (en) * | 2017-06-06 | 2017-09-26 | 中国人民解放军69081部队防化修理所 | By the method for scheming to advance and the electronic map for realizing this method |
| CN108534830A (en) * | 2018-04-13 | 2018-09-14 | 山东省农业信息中心 | A kind of agricultural technology service station positioning display method and system based on GIS and space-time Internet of Things |
| WO2019100218A1 (en) * | 2017-11-21 | 2019-05-31 | 深圳市大疆创新科技有限公司 | Method and apparatus for presenting maps in superposed manner, and unmanned flight system |
| CN110502705A (en) * | 2019-07-16 | 2019-11-26 | 贝壳技术有限公司 | A kind of method and device of the electronic map search based on intelligent terminal |
| WO2019223618A1 (en) * | 2018-05-21 | 2019-11-28 | 京东方科技集团股份有限公司 | Map drawing method and device for maps engine, terminal device and storage medium |
| CN110516018A (en) * | 2019-08-05 | 2019-11-29 | 山东开创云软件有限公司 | A kind of the electronics method for drafting and device in river |
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