CN105865464A - Method and apparatus for searching interest points surrounding path - Google Patents
Method and apparatus for searching interest points surrounding path Download PDFInfo
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- CN105865464A CN105865464A CN201510031724.7A CN201510031724A CN105865464A CN 105865464 A CN105865464 A CN 105865464A CN 201510031724 A CN201510031724 A CN 201510031724A CN 105865464 A CN105865464 A CN 105865464A
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Abstract
The present invention provides a method and apparatus for searching interest points surrounding a path. The method comprises: acquiring a start position and a final position of a path; determining a path straight line between the start position and the final position on an electronic map based on the latitude and longitude corresponding to the start position and the latitude and longitude corresponding to the final position to the position; determining a corresponding searching straight according to the distance of the path straight line; determining the searching distance of an interest point according to the density of distribution of the interest points surrounding the searching straight line on the electronic map; segmenting the searching straight line to obtain a plurality of nodes by using the searching distance as a unit, and acquiring latitude and longitude corresponding to the nodes; determining a search area by using the latitude and longitude corresponding to the nodes as the center of a circle and the searching distance as the radius in the electronic map; and acquiring the interest points included in the search area. The method and apparatus realize searching of interest points surrounding the path.
Description
Technical field
The present invention relates to field of navigation technology, particularly relate to a kind of searching route periphery point of interest method and
Device.
Background technology
Along with the progress of technology, electronic chart can not only provide navigation for the trip of people, and can also pass through
In display electronic chart, the point of interest (Point of Interest POI) of record meets the need of people's daily life
Ask.Such as, all comprising neighbouring look facility in traditional navigation system, people can be obtained by GPS location
Know the geographical position at place, the dining room of this geographical position adnexa, bank, megastore can be viewed simultaneously
And other point of interest such as park.
Traditional interest point search method, is all to search for certain map space model centered by current location
The point of interest comprised in enclosing.But geographical position is not stop conversion in the navigation procedure of people's go off daily,
People need the point of interest that the path periphery knowing traveling comprises.Such as, car owner's startup procedure needs to know
Planning guidance path periphery have how many gas stations, with meet automobile exercise during refuel demand.Pass
The mode of the interest point search method searching for point of interest of system is single, it is impossible to the search to path periphery point of interest.
Summary of the invention
Based on this, it is necessary to for above-mentioned technical problem, it is provided that path periphery point of interest is carried out by a kind of realization
The method and apparatus of the searching route periphery point of interest of search.
A kind of method of searching route periphery point of interest, described method includes:
The start position of acquisition approach and final position；
Starting point on electronic chart is determined according to the longitude and latitude that the longitude and latitude that start position is corresponding is corresponding with final position
Path straight line between position and final position；
Distance according to path straight line determines the search straight line of correspondence；
The detection range of point of interest is determined according to the distribution density searching for rectilinear periphery point of interest on electronic chart；
If described search straight line being carried out cutting in units of described detection range to obtain dry contact, and obtain institute
State the longitude and latitude that node is corresponding；
According on electronic chart using longitude and latitude corresponding to described node as the center of circle using described detection range as half
The region in footpath determines region of search；
The point of interest comprised in obtaining described region of search.
Wherein in an embodiment, the described distance according to path straight line determines the step of the search straight line of correspondence
Suddenly, including:
Judge whether the distance of described path straight line is more than predetermined threshold value, the most then along described path straight line
Direction starts to intercept and described predetermined threshold value equidistant search straight line from start position；
If it is not, the most described path straight line is search straight line.
Wherein in an embodiment, described according on electronic chart using longitude and latitude corresponding to described node as
The center of circle determines the step of region of search using described detection range as the region of radius, including:
Obtain the longitude and latitude so that described node is corresponding successively to obtain as radius as the center of circle using described detection range
Border circular areas；
Region of search is obtained by merging described border circular areas.
Wherein in an embodiment, the step of the point of interest comprised in the described region of search of described acquisition, bag
Include:
According to the mapping relations between default point of interest and longitude and latitude, with described node in extraction region of search
The point of interest that corresponding longitude and latitude distance is corresponding less than or equal to the longitude and latitude of described detection range；
The point of interest extracted is carried out duplicate removal process, the point of interest comprised in obtaining described region of search.
Wherein in an embodiment, after the step of the point of interest comprised in described acquisition region of search, institute
Method of stating also includes:
The weighted value that described point of interest is corresponding is calculated respectively according to default weighted value computation model, and according to power
Described point of interest is ranked up by weight values order from high to low successively.
A kind of device of searching route periphery point of interest, described device includes:
Position acquisition module, for start position and the final position of acquisition approach；
Path straight line determines module, for the warp corresponding with final position according to the longitude and latitude that start position is corresponding
Latitude determines the path straight line on electronic chart between start position and final position；
Search straight line determines module, for determining the search straight line of correspondence according to the distance of path straight line；
Distance determines module, for determining according to the distribution density searching for rectilinear periphery point of interest on electronic chart
The detection range of point of interest；
Longitude and latitude acquisition module, obtains for described search straight line being carried out cutting in units of described detection range
If to dry contact, and obtaining the longitude and latitude that described node is corresponding；
Region of search determines module, for according on electronic chart using longitude and latitude corresponding to described node as circle
The heart determines region of search using described detection range as the region of radius；
Point of interest acquisition module, the point of interest comprised in obtaining described region of search.
Wherein in an embodiment, described path straight line determines that module is additionally operable to judge described path straight line
Whether distance more than predetermined threshold value, the most then starts to intercept along described path rectilinear direction from start position
Search straight line equidistant with described predetermined threshold value；If it is not, the most described path straight line is search straight line.
Wherein in an embodiment, described region of search determines that module includes:
Border circular areas acquisition module, for obtaining successively using longitude and latitude corresponding to described node as the center of circle with institute
State the border circular areas that detection range obtains as radius；
Border circular areas merges module, for obtaining region of search by the described border circular areas of merging.
Wherein in an embodiment, described point of interest acquisition module includes:
Interest point extraction module, for according to the mapping relations between point of interest and the longitude and latitude preset, extracts
Longitude and latitude distance corresponding with described node in region of search is less than or equal to the longitude and latitude pair of described detection range
The point of interest answered；
Point of interest deduplication module, for the point of interest extracted is carried out duplicate removal process, obtains the described field of search
The point of interest comprised in territory.
Wherein in an embodiment, described device also includes:
Order module, for calculating, according to the weighted value computation model preset, the power that described point of interest is corresponding respectively
Weight values, and successively described point of interest is ranked up according to weighted value order from high to low.
The method and apparatus of above-mentioned searching route periphery point of interest, can be by search straight line on electronic chart
Neighboring area is divided into multiple overlapped circular shapes region and determines the region of search of search rectilinear periphery point of interest, from
The point of interest obtained in region of search is the point of interest of path periphery, it is achieved thereby that searching route periphery
Point of interest.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the method for searching route periphery point of interest in an embodiment；
Fig. 2 is the example determining region of search in an embodiment in the method for searching route periphery point of interest
Figure；
Fig. 3 is the schematic diagram obtaining the point of interest comprised in region of search in an embodiment；
Fig. 4 is the application scenarios figure of the method for searching route periphery point of interest in an embodiment；
Fig. 5 is the structural representation of the device of searching route periphery point of interest in an embodiment；
Fig. 6 is the structural representation of region of search computing module in an embodiment；
Fig. 7 is the structural representation of point of interest acquisition module in an embodiment；
Fig. 8 is the structural representation of the device of searching route periphery point of interest in another embodiment.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with accompanying drawing and reality
Execute example, the present invention is further elaborated.Only should be appreciated that specific embodiment described herein
Only in order to explain the present invention, it is not intended to limit the present invention.
As it is shown in figure 1, in one embodiment, it is provided that a kind of method of searching route periphery point of interest,
The method is illustrated in the device with GPS location navigation to apply, and this device includes but do not limits
In vehicle-mounted computer, smart mobile phone, panel computer and personal digital assistant etc., the method includes walking as follows
Rapid:
Step 101, the start position of acquisition approach and final position.
Step 102, determines electronics according to the longitude and latitude that the longitude and latitude that start position is corresponding is corresponding with final position
Path straight line between start position and final position on map.
Start position refers to departure place that user inputs on electronic chart or obtains user institute by location
The geographical position at place, final position refers to that user wants the destination arrived.Longitude and latitude is longitude
(longitude) with latitude (latitude) be collectively referred to as composition coordinate system.It is also called geographic coordinate system
System.Unique geographical position on electronic chart is can determine by longitude and latitude.By start position and terminal position
Put the path straight line that coordinate points (longitude and latitude) i.e. determines between 2 on electronic chart.
Step 103, determines the search straight line of correspondence according to the distance of path straight line.
Path between the distance the longest expression start position position to terminal of path straight line is the most remote, path periphery
The quantity of the point of interest comprised is the most, and user is only concerned and the point of interest oneself having close association, works as road
Footpath straight line is long, there is no need to calculate the point of interest of the path all circumferential distribution of straight line, so increases calculating
Amount, the point of interest major part simultaneously scanned for is skimble-skamble.Therefore search straight line is used to limit search
Path rectilinear periphery point of interest scope.Such as, point of interest is gas station, and automobile fills it up with oil from start position
Set out and need to refuel what institute's driving path determined that, more than the gas station pair of the driving path of automobile next time
To become meaningless in user.
Concrete, step 103 includes: judge whether the distance of path straight line is more than predetermined threshold value, if so,
Then start to intercept and predetermined threshold value equidistant search straight line along path rectilinear direction from start position；If
No, then path straight line is search straight line.
Step 104, the distribution density according to searching for rectilinear periphery point of interest on electronic chart determines point of interest
Detection range.
The point of interest quantity that point of interest density is distributed in referring to path rectilinear periphery unit map area, according to emerging
The distribution density of interest point determines that detection range makes its point of interest be distributed in zone of reasonableness near the rectilinear periphery of path
In, in one embodiment, detection range is the empirical value by obtaining after statistics.Such as, point of interest is
Gas station, the detection range determined according to the distribution density of gas station is 10 kms.
Step 105, if search straight line being carried out cutting in units of detection range to obtain dry contact, and obtains
The longitude and latitude that node is corresponding.
Step 106, according on electronic chart using longitude and latitude corresponding to node as the center of circle using detection range as
The region of radius determines region of search.
Search straight line cutting is that the end points of some sections each section is node, is made by longitude and latitude corresponding for this node
For the center of circle, a border circular areas, border circular areas can be enclosed using detection range on electronic chart as radius
Quantity equal with number of nodes.If the distance of search straight line is less than detection range, then region of search is one
Border circular areas, if the distance great-than search distance of search straight line, region of search is by multiple border circular areas overlap structures
Become.
Such as, as in figure 2 it is shown, longitude and latitude corresponding to start position is S (lon, lat), final position is corresponding
Longitude and latitude E (lon, lat), the path straight line of start position to final position is D, and predetermined threshold value is
(the ultimate range scope of distance start position, exceedes the point of interest of this scope relative to start position to Dmax
Lose meaning).Search straight line be d (if the distance of path straight line is less than or equal to predetermined threshold value, then d=D, if
Path straight line is more than predetermined threshold value, then d=Dmax).Detection range Rmax: emerging according to search rectilinear periphery
The distribution density of interest point, determines the length of detection range so that the point of interest searched is distributed in search straight line
In the zone of reasonableness of periphery.Border circular areas number N: if d is less than Rmax, then N is equal to 1, if d is big
In Rmax, then N=(d/Rmax)+1.Circle of contact radius r=Rmax, circle of contact central coordinate of circle Ci:Ci=S+ir
(E-S)/| E-S |, wherein the value of i is from 1 to N.Wherein (E-S)/| E-S | represent final position relative to
The unit direction of start position.Can calculate shared by each border circular areas according to central coordinate of circle and radius
Geographical position, by merging i.e. available corresponding region of search, the geographical position of multiple border circular areas.
In one embodiment, step 106, according on electronic chart using longitude and latitude corresponding to node as the center of circle with
As the region of radius, detection range determines that region of search includes: obtain the longitude and latitude so that node is corresponding successively and make
The border circular areas obtained using detection range as radius for the center of circle；The field of search is obtained by merging border circular areas
Territory.
Step 107, the point of interest comprised in obtaining region of search.
In one embodiment, according to the mapping relations between default point of interest and longitude and latitude, extract search
The point of interest that longitude and latitude distance corresponding with node in region is corresponding less than or equal to the longitude and latitude of detection range；
The point of interest extracted is carried out duplicate removal process, the point of interest comprised in obtaining region of search.
In the present embodiment, as a reference point with the center of circle (longitude and latitude that node is corresponding), by advance in data
The point of interest Hash table inquiry distance center of circle being interested in less than or equal to radius (detection range) built in storehouse
Point, the point of interest inquired in merging each border circular areas also carries out duplicate removal, the point of interest composition after duplicate removal
The point of interest that set comprises in being region of search, it is preferred that interest point set stores in lists.
As it is shown on figure 3, the region of search between start position S and final position E is a circle
Territory, concrete, according to central coordinate of circle 0 (lon, lat) and radius r, foursquare four seats can be obtained
Mark A (lon-r, lat+r), B (lon+r, lat+r), C (lon-r, lat-r), D (lon+r, lat
-r).According to A, B, C and D tetra-point coordinates determine that the coordinate range of point of interest is lon-
R=< LON≤lon+r, lat-r=< LAT≤lat+r.Obtain coordinate point of interest in this range, enter one
Step, calculates the distance in the point of interest respective coordinates distance center of circle 0, obtains the distance coordinate less than or equal to radius r
Point.And according to mapping relations between default point of interest and longitude and latitude, obtain the distance seat less than or equal to radius r
The point of interest that punctuate (longitude and latitude) is corresponding.
The method of above-mentioned searching route periphery point of interest, can be by the surrounding zone of search straight line on electronic chart
Territory is divided into multiple overlapped circular shapes region and determines the region of search of search rectilinear periphery point of interest, from the field of search
The point of interest obtained in territory is the point of interest of path periphery, it is achieved thereby that the interest of searching route periphery
Point.
By the calculating process of searching route periphery point of interest being reduced to the search multiple circle of straight line periphery
The point of interest comprised in region, greatly reduces the operand of searching for point of interest, improves the search of point of interest
Efficiency.
In one embodiment, after step 107, the point of interest comprised in obtaining region of search, the party
Method also includes:
The weighted value that point of interest is corresponding is calculated respectively according to default weighted value computation model, and according to weighted value
Point of interest is ranked up by order from high to low successively.
In the present embodiment, the point of interest quantity searched is magnanimity, so that user can quickly navigate to
Point of interest of interest.Calculated the high forward arrangement of point of interest of weighted value by weighted value, facilitate user
Check.Comprising default multiple weight parameter in weighted value computation model, such as, point of interest is gas station,
The weight parameter that weighted value computation model includes has gas station's distance, oil price and user's evaluation etc. from starting point
Deng.
In one embodiment, after step 107, the method also includes: receive the interest that user chooses
Point, is calculated by best path algorithm and goes to final position from user geographic location through point of interest
Good path, and the real-time navigation going to point of interest is provided.User is facilitated quickly to arrive point of interest.
As shown in Figure 4, in an actual application scenarios of the present invention, user wants to drive from electronic chart
In S point position leave for E point position, get the distribution of the point of interest of rectilinear periphery between S and E
Figure.Wherein point of interest A is bank, and point of interest B is market, and point of interest C is gas station, and point of interest D is public
Garden.User can select according to demand to want through point of interest, by best path algorithm be user again
Planning arrives the path of E point position, and travels offer real-time navigation for vehicle.
As it is shown in figure 5, in one embodiment, it is provided that the device of a kind of searching route periphery point of interest,
This device includes such as lower module:
Position acquisition module 50, for start position and the final position of acquisition approach.
Path straight line determines module 51, for corresponding with final position according to the longitude and latitude that start position is corresponding
Longitude and latitude determines the path straight line on electronic chart between start position and final position.
Search straight line determines module 52, for determining the search straight line of correspondence according to the distance of path straight line.
Distance determines module 53, for true according to the distribution density searching for rectilinear periphery point of interest on electronic chart
Determine the detection range of point of interest.
Longitude and latitude acquisition module 54, obtains some for search straight line being carried out cutting in units of detection range
Node, and obtain the longitude and latitude that node is corresponding.
Region of search determines module 55, for according on electronic chart using longitude and latitude corresponding to node as the center of circle
Region of search is determined using detection range as the region of radius.
Point of interest acquisition module 56, the point of interest comprised in obtaining region of search.
In one embodiment, path straight line determines whether module 52 is additionally operable to judge the distance of path straight line
More than predetermined threshold value, the most then along path rectilinear direction from start position start intercept with predetermined threshold value away from
From equal search straight line；If it is not, then path straight line is search straight line.
As shown in Figure 6, in one embodiment, region of search determines that module 55 includes:
Border circular areas acquisition module 550, for obtaining successively using longitude and latitude corresponding to node as the center of circle to search
The border circular areas that rope distance obtains as radius.
Border circular areas merges module 551, for obtaining region of search by merging border circular areas.
As it is shown in fig. 7, in one embodiment, point of interest acquisition module 56 includes:
Interest point extraction module 560, according to the mapping relations between default point of interest and longitude and latitude, extracts
The interest that longitude and latitude distance corresponding with node in region of search is corresponding less than or equal to the longitude and latitude of detection range
Point.
Point of interest deduplication module 561, for the point of interest extracted is carried out duplicate removal process, obtains region of search
The point of interest inside comprised.
As shown in Figure 8, in one embodiment, it is provided that a kind of searching route periphery point of interest device also
Including:
Order module 57, for calculating, according to the weighted value computation model preset, the weight that point of interest is corresponding respectively
Value, and successively point of interest is ranked up according to weighted value order from high to low.
Above example only have expressed the several embodiments of the present invention, and it describes more concrete and detailed, but
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that, for this area
For those of ordinary skill, without departing from the inventive concept of the premise, it is also possible to make some deformation and change
Entering, these broadly fall into protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be with appended power
Profit requires to be as the criterion.
Claims (10)
1. a method for searching route periphery point of interest, described method includes:
The start position of acquisition approach and final position；
Starting point on electronic chart is determined according to the longitude and latitude that the longitude and latitude that start position is corresponding is corresponding with final position
Path straight line between position and final position；
Distance according to path straight line determines the search straight line of correspondence；
The detection range of point of interest is determined according to the distribution density searching for rectilinear periphery point of interest on electronic chart；
If described search straight line being carried out cutting in units of described detection range to obtain dry contact, and obtain institute
State the longitude and latitude that node is corresponding；
According on electronic chart using longitude and latitude corresponding to described node as the center of circle using described detection range as half
The region in footpath determines region of search；
The point of interest comprised in obtaining described region of search.
Method the most according to claim 1, its spy is, the described distance according to path straight line is true
The step of fixed corresponding search straight line, including:
Judge whether the distance of described path straight line is more than predetermined threshold value, the most then along described path straight line
Direction starts to intercept and described predetermined threshold value equidistant search straight line from start position；
If it is not, the most described path straight line is search straight line.
3. the method requiring described in 1 according to power, it is characterised in that described according on electronic chart with described
The longitude and latitude that node is corresponding determines the step of region of search as the center of circle using described detection range as the region of radius
Suddenly, including:
Obtain the longitude and latitude so that described node is corresponding successively to obtain as radius as the center of circle using described detection range
Border circular areas；
Region of search is obtained by merging described border circular areas.
Method the most according to claim 1, it is characterised in that in the described region of search of described acquisition
The step of the point of interest comprised, including:
According to the mapping relations between default point of interest and longitude and latitude, with described node in extraction region of search
The point of interest that corresponding longitude and latitude distance is corresponding less than or equal to the longitude and latitude of described detection range；
The point of interest extracted is carried out duplicate removal process, the point of interest comprised in obtaining described region of search.
Method the most according to claim 1, it is characterised in that comprise in described acquisition region of search
Point of interest step after, described method also includes:
The weighted value that described point of interest is corresponding is calculated respectively according to default weighted value computation model, and according to power
Described point of interest is ranked up by weight values order from high to low successively.
6. the device of a searching route periphery point of interest, it is characterised in that described device includes:
Position acquisition module, for start position and the final position of acquisition approach；
Path straight line determines module, for the warp corresponding with final position according to the longitude and latitude that start position is corresponding
Latitude determines the path straight line on electronic chart between start position and final position；
Search straight line determines module, for determining the search straight line of correspondence according to the distance of path straight line；
Distance determines module, for determining according to the distribution density searching for rectilinear periphery point of interest on electronic chart
The detection range of point of interest；
Longitude and latitude acquisition module, obtains for described search straight line being carried out cutting in units of described detection range
If to dry contact, and obtaining the longitude and latitude that described node is corresponding；
Region of search determines module, for according on electronic chart using longitude and latitude corresponding to described node as circle
The heart determines region of search using described detection range as the region of radius；
Point of interest acquisition module, the point of interest comprised in obtaining described region of search.
Device the most according to claim 6, its spy is, described path straight line determines that module is also used
Whether it is more than predetermined threshold value, the most then along described path straight line side in the distance judging described path straight line
Start to intercept and described predetermined threshold value equidistant search straight line to from start position；If it is not, the most described road
Footpath straight line is search straight line.
8. require the device described in 6 according to power, it is characterised in that described region of search determines module bag
Include:
Border circular areas acquisition module, for obtaining successively using longitude and latitude corresponding to described node as the center of circle with institute
State the border circular areas that detection range obtains as radius；
Border circular areas merges module, for obtaining region of search by the described border circular areas of merging.
Device the most according to claim 6, it is characterised in that described point of interest acquisition module bag
Include:
Interest point extraction module, for according to the mapping relations between point of interest and the longitude and latitude preset, extracts
Longitude and latitude distance corresponding with described node in region of search is less than or equal to the longitude and latitude pair of described detection range
The point of interest answered；
Point of interest deduplication module, for the point of interest extracted is carried out duplicate removal process, obtains described region of search
The point of interest inside comprised.
Device the most according to claim 6, it is characterised in that described device also includes:
Order module, for calculating, according to the weighted value computation model preset, the power that described point of interest is corresponding respectively
Weight values, and successively described point of interest is ranked up according to weighted value order from high to low.
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| CN111859714A (en) * | 2020-08-03 | 2020-10-30 | 国网重庆市电力公司电力科学研究院 | Power frequency electric field intensity calculation method and system and power frequency electric field shielding device |
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