CN109062917A - A kind of offline map creation of facing area range and localization method - Google Patents
A kind of offline map creation of facing area range and localization method Download PDFInfo
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- CN109062917A CN109062917A CN201810518880.XA CN201810518880A CN109062917A CN 109062917 A CN109062917 A CN 109062917A CN 201810518880 A CN201810518880 A CN 201810518880A CN 109062917 A CN109062917 A CN 109062917A
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- 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
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Abstract
The invention discloses a kind of creation of the offline map of facing area range and localization method, creation and positioning including offline map.Present invention uses the latitude and longitude informations that the plan view of regional scope and mobile equipment GPS acquire, pair warp and weft degree information carries out gauss projection and is converted into plane coordinates first, again by choosing one group of (plane coordinates-plan view pixel coordinate of gauss projection) calibration point, one group of transformation ratio is fitted by least square method, realizes the formulation association of the two.The final association for realizing GPS latitude and longitude coordinates and plan view coordinate, realizes the offline positioning based on plan view.
Description
Technical field
The invention belongs to offline map field, the offline map creation of specifically a kind of facing area range and positioning side
Method.
Background technique
We possess many outstanding third party map companies at present, such as the public affairs that Google, Baidu, Gao De, Tencent are outstanding
Department.They both provide the downloading and positioning of mobile phone version offline map, so that mobile subscriber is in the case where no network accesses
Still latitude and longitude information can be obtained by GPS and realize offline positioning.However they are not provided with for computerized version mostly
Offline map downloading and use approach.
There are many such demands in practice, the operating personnel to work in certain area coverage passes through mobile device
GPS module acquires and saves latitude and longitude information.After the completion of operation, data center is transmitted to by local area network and realizes operation track playback
To facilitate examination and management.Since the data center of many enterprises and institutions is only connected to internal lan, can not pass through
The map API that tripartite map companies provide positions to realize.
Summary of the invention
The present invention proposes a kind of based on plan view and GPS longitude and latitude for the offline orientation problem within the scope of facing area
Information is spent, using gauss projection conversion and Least-square fitting method, carries out latitude and longitude coordinates and flat image element coordinate
Conversion realizes the offline localization method of the map and position location API that provide independent of tripartite map companies.Its particular technique side
Case is as follows:
A kind of offline map creation of facing area range and localization method, creation and positioning including offline map, institute
The creation for stating offline map includes the following steps:
Step 1: calibration
1) the eye-catching location point in several positions is randomly selected on electronic plane figure, records their pixel coordinate；
2) latitude and longitude information that above-mentioned corresponding position is acquired using the terminal device with GPS module, establishes above-mentioned location point
Longitude and latitude and flat image element coordinate corresponding relationship.
Step 2: gauss projection is converted
1) latitude and longitude information of GPS is subjected to gauss projection on the basis of the reference ellipsoid of WGS-84 coordinate system, wherein
WGS-84, that is, World Geodesic Coordinate System 1984；
2) collected GPS latitude and longitude information is converted into the plane coordinates of gauss projection；
Step 3: establishing the plane coordinates of gauss projection and the pixel coordinate transformational relation of plan view.
Further, the step 3 specifically comprises the following steps:
1) establish that affine transformation is polynomial to seek ginseng formulaWherein (x, y) is after gauss projection
Plane coordinates, px,pyFor the pixel coordinate of plan view；
2) data based on known one group of respective coordinates solve unknown parameter using least square method
a0,a1,a2,b0,b1,b2；
3) after finding out unknown parameter, pass through known (x, y) using above-mentioned formula and calculate one group of p'x,p'yAnd with it is known
Px,pyComparison；
4) the biggish coordinate points of error are rejected, step 2 is repeated and obtains new unknown parameter；
5) by new parameter a0,a1,a2,b0,b1,b2Determining conversion formula and plan view collectively constitutes offline map.
Further, the positioning includes the following steps:
1) based on the offline map built up, the latitude and longitude information of the GPS of terminal acquisition is first subjected to Gauss conversion, then
The pixel coordinate of plan view is converted by above-mentioned formula；
2) pixel coordinate of plan view is marked out with patterned mark to complete location requirement.
Present invention uses the latitude and longitude informations that the plan view of regional scope and mobile equipment GPS acquire, first pair warp and weft
Degree information carries out gauss projection and is converted into plane coordinates, then by choosing one group of (plane coordinates-plan view of gauss projection
Pixel coordinate) calibration point, one group of transformation ratio is fitted by least square method, realizes the formulation association of the two.It is final real
The association of existing GPS latitude and longitude coordinates and plan view coordinate, realizes the offline positioning based on plan view.
Detailed description of the invention
Fig. 1 is offline map creation and the localization method flow chart of facing area range of the invention.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As shown in Figure 1, the offline map creation of facing area range of the invention and localization method select one group of calibration point,
That is the GPS latitude and longitude information of the pixel of area planar figure and respective pixel physical location acquisition nearby, have been directed to longitude and latitude letter
The transition problem of breath and plan view, their transformational relation is realized using gauss projection conversion and least square method.
Specific step is as follows:
One, it demarcates
1) the eye-catching location point in several positions is randomly selected on electronic plane figure, records their pixel coordinate；
2) latitude and longitude information that above-mentioned corresponding position is acquired using the terminal device with GPS module, establishes above-mentioned location point
Longitude and latitude and flat image element coordinate corresponding relationship.
Two, gauss projection is converted
1) latitude and longitude information of GPS is subjected to gauss projection on the basis of the reference ellipsoid of WGS-84 coordinate system, wherein
WGS-84, that is, World Geodesic Coordinate System 1984, theoretically 1, using earth centroid as the terrestrial coordinate system of coordinate origin, is grown
Radius mouth is 6387137m, eccentricity 1/298.257223563；
2) collected GPS latitude and longitude information is converted into the plane coordinates of gauss projection；
Three, the plane coordinates of gauss projection and the pixel coordinate transformational relation of plan view are established:
1) establish that affine transformation is polynomial to seek ginseng formulaWherein (x, y) is after gauss projection
Plane coordinates, px,pyFor the pixel coordinate of plan view；
2) data based on known one group of respective coordinates solve unknown parameter using least square method
a0,a1,a2,b0,b1,b2；
3) after finding out unknown parameter, pass through known (x, y) using above-mentioned formula and calculate one group of p'x,p'yAnd with it is known
Px,pyComparison；
4) the biggish coordinate points of error are rejected, step 2 is repeated and obtains new unknown parameter；
5) by new parameter a0,a1,a2,b0,b1,b2Determining conversion formula and plan view collectively constitutes offline map.
Four, it positions
1) based on the offline map built up, the latitude and longitude information of the GPS of terminal acquisition is first subjected to Gauss conversion, then
The pixel coordinate of plan view is converted by above-mentioned formula；
2) pixel coordinate of plan view is marked out with patterned mark to complete location requirement.
Claims (3)
1. a kind of offline map of facing area range creates and localization method, creation and positioning including offline map, special
Sign is: the creation of the offline map includes the following steps:
Step 1: calibration
1) the eye-catching location point in several positions is randomly selected on electronic plane figure, records their pixel coordinate；
2) latitude and longitude information that above-mentioned corresponding position is acquired using the terminal device with GPS module, establishes the warp of above-mentioned location point
The corresponding relationship of latitude and flat image element coordinate.
Step 2: gauss projection is converted
1) latitude and longitude information of GPS is subjected to gauss projection on the basis of the reference ellipsoid of WGS-84 coordinate system, wherein WGS-84
That is World Geodesic Coordinate System 1984；
2) collected GPS latitude and longitude information is converted into the plane coordinates of gauss projection；
Step 3: establishing the plane coordinates of gauss projection and the pixel coordinate transformational relation of plan view.
2. the offline map of facing area range as described in claim 1 creates and localization method, it is characterised in that: the step
Rapid three specifically comprise the following steps:
1) establish that affine transformation is polynomial to seek ginseng formulaWherein (x, y) is flat after gauss projection
Areal coordinate, px,pyFor the pixel coordinate of plan view；
2) data based on known one group of respective coordinates solve unknown parameter a using least square method0,a1,a2,b0,b1,b2；
3) after finding out unknown parameter, pass through known (x, y) using above-mentioned formula and calculate one group of p'x,p'yAnd with known px,
pyComparison；
4) the biggish coordinate points of error are rejected, step 2 is repeated and obtains new unknown parameter；
5) by new parameter a0,a1,a2,b0,b1,b2Determining conversion formula and plan view collectively constitutes offline map.
3. the offline map of facing area range as claimed in claim 2 creates and localization method, it is characterised in that: described fixed
Position includes the following steps:
1) based on the offline map built up, the latitude and longitude information of the GPS of terminal acquisition is first subjected to Gauss conversion, then pass through
Above-mentioned formula is converted into the pixel coordinate of plan view；
2) pixel coordinate of plan view is marked out with patterned mark to complete location requirement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810518880.XA CN109062917A (en) | 2018-05-25 | 2018-05-25 | A kind of offline map creation of facing area range and localization method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810518880.XA CN109062917A (en) | 2018-05-25 | 2018-05-25 | A kind of offline map creation of facing area range and localization method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112241016A (en) * | 2019-07-19 | 2021-01-19 | 北京初速度科技有限公司 | Method and device for determining geographic coordinates of parking map |
| CN114608563A (en) * | 2022-05-11 | 2022-06-10 | 成都瑞讯物联科技有限公司 | Navigation map generation method and fusion positioning navigation method |
Citations (3)
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| CN101441075A (en) * | 2008-12-04 | 2009-05-27 | 上海交通大学 | Map projection method using remote sense map tool |
| CN107845060A (en) * | 2017-10-31 | 2018-03-27 | 广东中星电子有限公司 | Geographical position and corresponding image position coordinates conversion method and system |
| CN107945229A (en) * | 2017-10-24 | 2018-04-20 | 国家卫星气象中心 | Fixed star barycenter extracting method for stationary orbit earth observation satellite face battle array instrument |
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| CN101441075A (en) * | 2008-12-04 | 2009-05-27 | 上海交通大学 | Map projection method using remote sense map tool |
| CN107945229A (en) * | 2017-10-24 | 2018-04-20 | 国家卫星气象中心 | Fixed star barycenter extracting method for stationary orbit earth observation satellite face battle array instrument |
| CN107845060A (en) * | 2017-10-31 | 2018-03-27 | 广东中星电子有限公司 | Geographical position and corresponding image position coordinates conversion method and system |
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| 卢亮喜 等: "浅议中小城市ITS电子地图坐标转换问题", 《测绘与空间地理信息》 * |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112241016A (en) * | 2019-07-19 | 2021-01-19 | 北京初速度科技有限公司 | Method and device for determining geographic coordinates of parking map |
| CN114608563A (en) * | 2022-05-11 | 2022-06-10 | 成都瑞讯物联科技有限公司 | Navigation map generation method and fusion positioning navigation method |
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