CN107403020A - The method for retaining existing road net data and Network extension being carried out using OSM data - Google Patents
The method for retaining existing road net data and Network extension being carried out using OSM data Download PDFInfo
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Abstract
The invention discloses a kind of method for retaining existing road net data and Network extension being carried out using OSM data, this method can allow User Defined to need the road network region extended, and rapidly the road network scope that user needs to extend is connected in legacy network, the data message of former road network is remained simultaneously, finally gives the road net data file after being extended using OSM data.In real work, user can run into the situation for needing to expand research range on the basis of existing road network, the road network scope that the present invention is needed to extend by User Defined selection, automatically merged after OSM extracting datas extension road network information with existing road net data, remain the road network information that original user has safeguarded, the artificial manpower and time cost for adding section one by one and to road network after extension repeat check is saved, while improves the accuracy of extension road network.
Description
Technical field
The present invention relates to Traffic Net computer abstract expression technical field, retains existing road more particularly to one kind
Network data and the method that Network extension is carried out using OSM data.
Background technology
Because traffic system has the characteristics that complexity, can not be experimental, with the continuous development of computer science, traffic
Emulation is increasingly becoming the integrated decision-makings such as traffic planning and design, governmental investment prediction, the consulting of construction scheme overall merit, traffic engineering
Effective tool and means.Traffic simulation is carried out, premise and basis are exactly the road network for establishing survey region in a computer,
And this work is also to spend time and the most step of manpower.
For the designing institute, research institute or colleges and universities of field of traffic, accumulated by work for many years and project, they
Have that many cities or local content be complete, the computer road network data of reliable in quality, these data are to support him
Carry out the key of local project.However, the process developed along with Chinese Fast Urbanization, the scale of Chinese city is increasingly
Greatly, this causes many existing computer road network datas can not include the new Space Scale in city and research range.Cause
This, existing road network data is extended be in traffic simulation one it is important the problem of.
The method of conventional Extension computer road network data needs user's control base map to be added to existing road network one by one
In, not only waste time and energy, the possibility of manual operation error is also add, so as to influence the progress of whole project and transportation network
The accuracy of distribution；And if the road network imported directly from OSM data after expanding, again can be by road that is perfect before, safeguarding
Network data is covered, it is necessary to checked again to former road network, can equally increase the working time.
The content of the invention
In order to solve above-mentioned problem, the present invention is provided a kind of existing road net data of reservation and entered using OSM data
The method of row Network extension, the road network scope for needing to extend by User Defined selection, extends road from OSM extracting datas automatically
Merged after net information with existing road net data, user only need to manually add existing road network and the node for extending road network border and
Section greatly reduces the manpower and time cost of extension road network, improves extension with regard to that can complete computer network extension work
The accuracy of road network, for up to this purpose, the present invention provides a kind of existing road net data of reservation and carries out road network expansion using OSM data
The method of exhibition, comprises the following steps, it is characterised in that：
Step (1) download package is containing the OSM map datums for needing extension road network region, if in the OSM rectangle map areas
Minimum latitude value is minlat, maximum latitude value maxlat, minimum longitude minlon, maximum longitude maxlon, A point longitudes and latitudes
Degree coordinate (minlon, minlat), B point latitude and longitude coordinates (minlon, maxlat), C points latitude and longitude coordinates (maxlon,
Minlat), D points latitude and longitude coordinates (maxlon, maxlat), by the latitude and longitude coordinates of OSM data interior joints, A points, B points, C points
UTM coordinate system coordinates are converted to the latitude and longitude coordinates of D points and the node coordinate of existing road net data；
Step (2) is set under UTM coordinate systems, A point coordinates (xa, ya), B point coordinates (xb, yb), C point coordinates (xc, yc), D points are sat
Mark (xd, yd)；With A points position origin, vectorial AB is y-axis, and vectorial AD is that x-axis establishes plane right-angle coordinate R, the A under the coordinate system
Point coordinates is changed into (0,0), and B point coordinates is changed into (0, xb-xa), C point coordinates is changed into (xc-xa, 0), D point coordinates is changed into (xd-xa,yd-
ya)；
The OSM rectangle map area pictures that step (3) interception is downloaded are used as base map, and longitude is minimum in picture, latitude minimum
The A points that are placed in coordinate system R of point, the B points that the point that longitude is minimum, latitude is maximum in picture is placed in coordinate system R, pass through in picture
The C points that the point that degree is maximum, latitude is minimum is placed in coordinate system R；User can in the coordinate system R for having base map self-defined polygon
Region as need carry out Network extension region, if the vertex set of this polygonal region is S, the number of vertices in S is i,
S is empty set under original state, i 1；
Step (4) user chooses i-th of the summit Ti, Ti of self-defined polygonal region in the coordinate system R containing base map
Have to be with A, B, C and D summit rectangular extent in, and can be on this square boundary；If coordinates of the Ti in R is
(xi, yi), then coordinates of the Ti under UTM coordinate systems is (xi+xa, yi+ya), by (xi+xa, yi+ya) be put into set S；In base map
On be highlighted point Ti position；
Step (5) is if i overlaps more than 4 and Ti with T1, then it is assumed that user selectes polygon and terminated, into step (6)；It is no
I+1 is then assigned to i, return to step (4)；
Step (6) forms user-defined closed polygon P by the node of the coordinate representation in set S, in UTM coordinates
Under system, the beginning and end in each section in OSM data is judged successively using ray method whether in polygon P, if risen
Point and terminal then delete the section, otherwise retain the section not in P；
Step (7) sets node serial number maximum in existing road net data as NodeID_max, and section numbering maximum is
WayID_max, the minimum value for ultimately remaining in the node serial number in OSM data is NodeID_min, ultimately remains in OSM data
In section numbering minimum value be WayID_min；If the numbering for i-th of node being retained in OSM data is NodeID_i,
The node serial number is changed into NodeID_i-NodeID_min+NodeID_max+1 after then carrying out Network extension；If it is retained in OSM numbers
The numbering in the j-th strip section in is WayID_j, then section numbering is changed into WayID_i-WayID_ after carrying out Network extension
min+WayID_max+1；
Step (8) imports the OSM data for changing node and section numbering in existing road net data file, and generation retains
Existing road net data and the road net data file being extended using OSM data；User manually adds according to road network actual conditions
Existing road network and node and the section for extending road network border, the road net data file formed after final extension.
Further, in the step 1, using the universal transverse Mercator method in cartography by the warp of corresponding points
Latitude coordinate is converted to UTM coordinate system coordinates.
Further, in the step 6, ray method judges a little whether the process in some polygonal region is：From
Point to be judged calculates the number n of ray and polygon intersection to horizontal direction injection line, if n be even number or for 0 if treat
Point is judged outside polygon, if n is odd number, in polygon；Point in Polygonal Boundary can consider in polygon
It is interior, it is also contemplated that outside polygon.
The invention discloses a kind of method for retaining road net data and Network extension being carried out using OSM data, with showing
There is technology to compare, the present invention has advantages below：
1st, the road network information for needing to extend is imported directly from OSM data, and is merged with existing road network, is saved
The manpower and time cost in section are manually added one by one, improve the speed and accuracy of Network extension；
2nd, while being extended to road network, the road network information that original user has safeguarded is remained, is saved pair
Road network repeat the working time of check after extension.
Brief description of the drawings
Fig. 1 is that the present invention is retained existing road net data and the flow chart of Network extension is carried out using OSM data；
Fig. 2 is one embodiment of the invention download comprising the OSM maps for needing extension road network region；
Fig. 3 is the road network schematic diagram of the existing road net data of one embodiment of the invention；
Fig. 4 is that one embodiment of the invention User Defined needs the Polygon Paths web area that extends in coordinate system R
Schematic diagram；
Fig. 5 is the user-defined road network schematic diagram for needing to extend of one embodiment of the invention；
Fig. 6 is that one embodiment of the invention is retained existing road net data and the net after Network extension is carried out using OSM data
Network schematic diagram.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings：
The present invention provides a kind of method for retaining existing road net data and Network extension being carried out using OSM data, by user
Self-defined selection needs the road network scope extended, automatically with having road net data after OSM extracting datas extension road network information
Merge, user only needs to manually add the node of existing road network and extension road network border and section with regard to that can complete computer network
Work is extended, greatly reduces the manpower and time cost of extension road network, improves the accuracy of extension road network.
A kind of method for retaining existing road net data and Network extension being carried out using OSM data of the present invention, its flow such as Fig. 1
It is shown.
Step (1) download package is containing the OSM map datums for needing extension road network region, if in the OSM rectangle map areas
Minimum latitude value is minlat, maximum latitude value maxlat, minimum longitude minlon, maximum longitude maxlon, A point longitudes and latitudes
Degree coordinate (minlon, minlat), B point latitude and longitude coordinates (minlon, maxlat), C points latitude and longitude coordinates (maxlon,
Minlat), D points latitude and longitude coordinates (maxlon, maxlat), by the latitude and longitude coordinates of OSM data interior joints, A points, B points, C points
UTM coordinate system coordinates are converted to the latitude and longitude coordinates of D points and the node coordinate of existing road net data；
In the present embodiment, including for download needs the OSM maps in extension road network region as shown in Figure 2；Existing road net data
Road network it is as shown in Figure 3；Minimum latitude value in OSM rectangle map areas is 31.9944000, maximum latitude value
32.1166000, minimum longitude 118.7014000, maximum longitude 118.8577000, A points, B points, the longitude and latitude of C points and D points
Spend coordinate and corresponding UTM coordinate systems coordinate is as shown in table 1.
The latitude and longitude coordinates of table 1 A, B, C and D node and corresponding UTM coordinate systems coordinate
| Node | Longitude | Latitude | UTM ordinates | UTM abscissas |
| A | 118.7014000 | 31.9944000 | 3541079.600787386 | 660726.5297759229 |
| B | 118.7014000 | 32.1166000 | 3554627.2953361487 | 660512.949893132 |
| C | 118.8577000 | 31.9944000 | 3541322.6954402537 | 675493.9466581749 |
| D | 118.8577000 | 32.1166000 | 3554870.894885617 | 675260.7241398427 |
Step (2) is set under UTM coordinate systems, A point coordinates (xa, ya), B point coordinates (xb, yb), C point coordinates (xc, yc), D points are sat
Mark (xd, yd)；With A points position origin, vectorial AB is y-axis, and vectorial AD is that x-axis establishes plane right-angle coordinate R, the A under the coordinate system
Point coordinates is changed into (0,0), and B point coordinates is changed into (0, xb-xa), C point coordinates is changed into (xc-xa, 0), D point coordinates is changed into (xd-xa,yd-
ya)；
The OSM rectangle map area pictures that step (3) interception is downloaded are used as base map, and longitude is minimum in picture, latitude minimum
The A points that are placed in coordinate system R of point, the B points that the point that longitude is minimum, latitude is maximum in picture is placed in coordinate system R, pass through in picture
The C points that the point that degree is maximum, latitude is minimum is placed in coordinate system R；User can in the coordinate system R for having base map self-defined polygon
Region as need carry out Network extension region, if the vertex set of this polygonal region is S, the number of vertices in S is i,
S is empty set under original state, i 1；
Step (4) user chooses i-th of the summit Ti, Ti of self-defined polygonal region in the coordinate system R containing base map
Have to be with A, B, C and D summit rectangular extent in, and can be on this square boundary；If coordinates of the Ti in R is
(xi, yi), then coordinates of the Ti under UTM coordinate systems is (xi+xa, yi+ya), by (xi+xa, yi+ya) be put into set S；In base map
On be highlighted point Ti position；
Step (5) is if i overlaps more than 4 and Ti with T1, then it is assumed that user selectes polygon and terminated, into step (6)；It is no
I+1 is then assigned to i, return to step (4)；
In the present embodiment, establish coordinate system R and add base map, user chooses polygon vertex and puts apex coordinate one by one
Enter in set S, the polygonal region that the needs ultimately formed extend is as shown in figure 4, numbering is that user establishes the suitable of summit in figure
Sequence.The region by Yangtze River main road, Ao Ti street, the western line of inner ring, Han Zhonglu, East Zhongshan Road, Xi'an door tunnel, inner ring east line,
Long Pan roads, Jianning road and Zheng He North Road surround, and the coordinate in final set S is as shown in table 2.
Apex coordinate in the set S of table 2
Step (6) forms user-defined closed polygon P by the node of the coordinate representation in set S, in UTM coordinates
Under system, the beginning and end in each section in OSM data is judged successively using ray method whether in polygon P, if risen
Point and terminal then delete the section, otherwise retain the section not in P；
In the present embodiment, by the OSM data not in using set S coordinate as the node outside the polygon P on summit and road
Net is deleted, and it is as shown in Figure 5 to obtain the user-defined road network for needing to extend.
Step (7) sets node serial number maximum in existing road net data as NodeID_max, and section numbering maximum is
WayID_max, the minimum value for ultimately remaining in the node serial number in OSM data is NodeID_min, ultimately remains in OSM data
In section numbering minimum value be WayID_min；If the numbering for i-th of node being retained in OSM data is NodeID_i,
The node serial number is changed into NodeID_i-NodeID_min+NodeID_max+1 after then carrying out Network extension；If it is retained in OSM numbers
The numbering in the j-th strip section in is WayID_j, then section numbering is changed into WayID_i-WayID_ after carrying out Network extension
min+WayID_max+1；
In the present embodiment, the node serial number maximum NodeID_max in existing road net data is 468, and section numbering is maximum
Value WayID_max is 917, and the minimum value NodeID_min for ultimately remaining in the node serial number in OSM data is 4, final to retain
The minimum value WayID_min of section numbering in OSM data is 3；The numbering for i-th of node being then retained in OSM data
It is changed into NodeID_i+465 after Network extension is carried out；The numbering in the j-th strip section being retained in OSM data is after Network extension
It is changed into WayID_i+915；
Step (8) imports the OSM data for changing node and section numbering in existing road net data file, and generation retains
Existing road net data and the road net data file being extended using OSM data；User manually adds according to road network actual conditions
Existing road network and node and the section for extending road network border, the road net data file formed after final extension.
The above described is only a preferred embodiment of the present invention, it is not the limit for making any other form to the present invention
System, and any modification made according to technical spirit of the invention or equivalent variations, still fall within present invention model claimed
Enclose.
Claims (3)
1. the method for retaining existing road net data and Network extension being carried out using OSM data, is comprised the following steps, its feature exists
In：
Step (1) download package is containing the OSM map datums for needing extension road network region, if the minimum in the OSM rectangle map areas
Latitude value is minlat, maximum latitude value maxlat, minimum longitude minlon, maximum longitude maxlon, and A points longitude and latitude is sat
Mark (minlon, minlat), B point latitude and longitude coordinates (minlon, maxlat), C point latitude and longitude coordinates (maxlon, minlat), D
Point latitude and longitude coordinates (maxlon, maxlat), by the latitude and longitude coordinates of OSM data interior joints, A points, B points, the warp of C points and D points
Latitude coordinate and the node coordinate of existing road net data are converted to UTM coordinate system coordinates；
Step (2) is set under UTM coordinate systems, A point coordinates (xa, ya), B point coordinates (xb, yb), C point coordinates (xc, yc), D point coordinates
(xd, yd)；With A points position origin, vectorial AB is y-axis, and vectorial AD is that x-axis establishes plane right-angle coordinate R, the A points under the coordinate system
Coordinate is changed into (0,0), and B point coordinates is changed into (0, xb-xa), C point coordinates is changed into (xc-xa, 0), D point coordinates is changed into (xd-xa,yd-
ya)；
The OSM rectangle map area pictures that step (3) interception is downloaded are used as base map, and longitude is minimum in picture, the point of latitude minimum
The A points being placed in coordinate system R, the B points that the point that longitude is minimum in picture, latitude is maximum is placed in coordinate system R, longitude is most in picture
Greatly, the C points that the minimum point of latitude is placed in coordinate system R；User can in the coordinate system R for having base map self-defined polygonal region
As the region for needing progress Network extension, if the vertex set of this polygonal region is S, the number of vertices in S is i, initially
S is empty set under state, i 1；
Step (4) user chooses i-th of summit T of self-defined polygonal region in the coordinate system R containing base mapi, TiHave to
Be with A, B, C and D summit rectangular extent in, and can be on this square boundary；If TiCoordinate in R is (xi, yi),
Then TiCoordinate under UTM coordinate systems is (xi+xa, yi+ya), by (xi+xa, yi+ya) be put into set S；Highlighted on base map aobvious
Show point Ti position；
Step (5) is if i is more than 4 and TiWith T1Overlap, then it is assumed that user selectes polygon and terminated, into step (6)；Otherwise by i
+ 1 is assigned to i, return to step (4)；
Step (6) forms user-defined closed polygon P by the node of the coordinate representation in set S, in UTM coordinate systems
Under, the beginning and end in each section in OSM data is judged successively using ray method whether in polygon P, if starting point
With terminal not in P, then the section is deleted, otherwise retains the section；
Step (7) sets node serial number maximum in existing road net data as NodeID_max, and section numbering maximum is
WayID_max, the minimum value for ultimately remaining in the node serial number in OSM data is NodeID_min, ultimately remains in OSM data
In section numbering minimum value be WayID_min；If the numbering for i-th of node being retained in OSM data is NodeID_i,
The node serial number is changed into NodeID_i-NodeID_min+NodeID_max+1 after then carrying out Network extension；If it is retained in OSM numbers
The numbering in the j-th strip section in is WayID_j, then section numbering is changed into WayID_i-WayID_ after carrying out Network extension
min+WayID_max+1；
Step (8) imports the OSM data for changing node and section numbering in existing road net data file, and generation retains existing
Road net data and the road net data file being extended using OSM data；User manually adds existing according to road network actual conditions
The node and section on road network and extension road network border, the road net data file formed after final extension.
2. the method according to claim 1 for retaining existing road net data and Network extension being carried out using OSM data, it is special
Sign is：In the step 1, the latitude and longitude coordinates of corresponding points are turned using the universal transverse Mercator method in cartography
It is changed to UTM coordinate system coordinates.
3. the method according to claim 1 for retaining existing road net data and Network extension being carried out using OSM data, it is special
Sign is：In the step 6, ray method judges a little whether the process in some polygonal region is：From point to be judged
To horizontal direction injection line, calculate the number n of ray and polygon intersection, if n be even number or for 0 if wait to judge point more
Outside the shape of side, if n is odd number, in polygon；Point in Polygonal Boundary can consider in polygon, it is also contemplated that
Outside polygon.
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