DE102014014847A1 - Method for operating a navigation system of a motor vehicle and motor vehicle - Google Patents

Abstract

Method for operating a navigation system (8) of a motor vehicle (7), wherein a position specification (3) and metadata comprehensive location information of a destination (2) from a motor vehicle external source, in particular the Internet, is taken into account for determining a current target position of the navigation upon selection of the location information by an operator for determining the destination position a) candidate entries which have a starting position (6) and / or position information which lies within a predetermined radius around the position information (3) of the location information, from a digital map data set of the navigation system ( 8) are determined, b) by comparing partial information of the candidate entries and the location information, in each case a matching information indicating compliance information is determined for each candidate entry, c) if at least one candidate entry satisfies an admissibility criterion evaluating the degree of agreement t, from this at least one candidate entry a destination entry highest match is selected and the starting position (6) of the target entry is selected as the target position, and d) otherwise the position information (3) of the location information is selected as the target position.

Description

The invention relates to a method for operating a navigation system of a motor vehicle, wherein for determining a current target position of the navigation, a position information and metadata comprehensive location information of a destination from a motor vehicle external source, in particular the Internet, is taken into account. In addition, the invention relates to a motor vehicle.

Navigation systems for motor vehicles are already widely known in the art. They are used to guide the driver of the motor vehicle (or in the case of autonomous operation, the motor vehicle directly) from a current position to a destination, which is described by a target position. Navigation systems usually use a digital map data record that is created especially for navigation applications. In particular, it is known for such map data sets that in the case of areas of interest with a larger area (so-called "points of interest" - POI), not only is a general position information included in the digital navigation data, but these additionally have a starting position. Such approach positions can be, for example, driveways, stopping areas for depositing persons, assigned parking spaces or their entrance, and the like, which offer a sensible access point to the destination (POI) that can be reached via the road network. Therefore, the approach positions are often referred to themselves as the access point ("Entrance Point"). If an entry of the digital map data has no additional starting position, the general position information of the corresponding entry is used as the starting position. The general position information, if it decides on the starting position, is usually used to display the destination in the navigation map.

Modern navigation systems have been proposed which provide an interface via which third-party providers, in particular Internet sources, can provide location information for destinations selected there to the navigation system. This location information can be used within the navigation system for route guidance. For this purpose it is known to use a position information contained in the location information as a target position for the navigation system. However, the problem arises that these position information or generally the location information is often allocated relatively arbitrarily and inaccurately. For example, if online maps available on the Internet are considered to be external to the vehicle location information, the location information includes, besides the coordinates describing a geodetic coordinate system, a name of the destination and an address, but the location information is often extended as the center of the location occupied by the destination Terrain is described. If, for example, a sports facility is considered as a possible destination, the navigation system of the motor vehicle would now try to steer the motor vehicle into the sports venue using the position information as the target position, which area is often characterized as an "off-road" area and to completely different access routes may not even touch the ideal access point for motor vehicles to the destination.

The invention is therefore based on the object to improve the route guidance to selected from non-motor vehicle sources destinations in a navigation system of a motor vehicle.

• a) Kandidateneinträge, die eine Anfahrposition und/oder Positionsangabe, die in einem vorbestimmten Umkreis um die Positionsangabe der Ortsinformation liegt, aufweisen, aus einem digitalen Kartendatensatz des Navigationssystems ermittelt werden,
• b) durch Vergleich von Teilinformationen der Kandidateneinträge und der Ortsinformation jeweils eine den Übereinstimmungsgrad angebende Übereinstimmungsinformation für jeden Kandidateneintrag ermittelt wird,
• c) sofern wenigstens ein Kandidateneintrag ein den Übereinstimmungsgrad auswertendes Zulässigkeitskriterium erfüllt, aus diesem wenigstens einen Kandidateneintrag ein Zieleintrag höchster Übereinstimmung ausgewählt wird und die Anfahrposition des Zieleintrags als Zielposition gewählt wird, und
• d) ansonsten die Positionsangabe der Ortsinformation als Zielposition gewählt wird.

To solve this problem, it is provided according to the invention in a method of the type mentioned that, when selecting the location information by an operator to determine the destination position

• a) candidate entries which have a starting position and / or position information which lies within a predetermined radius around the position information of the location information, are determined from a digital map data record of the navigation system,
• b) by matching partial information of the candidate entries and the location information, in each case a matching information indicating match information is determined for each candidate entry,
• c) if at least one candidate entry satisfies an admissibility criterion evaluating the degree of agreement, from this at least one candidate entry a destination entry of highest match is selected and the approach position of the destination entry is selected as target position, and
• d) otherwise the position information of the location information is selected as the target position.

Thus, a possibility is described as intelligently as possible for destinations (POIs), which are also known in the digital map dataset of the navigation database, to use the starting position (access point) stored in the digital map data in order to guide the route, in particular with regard to destinations of large-area extent to improve, for example, in terms of exhibition and exhibition centers, hospitals, shopping centers, sports facilities, especially stadiums, casinos, golf courses, amusement parks and the like, which is often known in the digital map data record of the navigation systems. The location information provided by the external source is thus used to determine the best possible geographical access point of the destination, to guide the driver safely and comfortably to his desired and expected destination. For this purpose, the present invention proposes to convert the location information as intelligently as possible into a target position that can be used for the navigation system of the motor vehicle. Specifically, partial information, in particular metadata, which is present as part of the location information and as part of an entry of the digital data record, is compared in order to also find the correct entry to the destination in the digital map data record.

For this purpose, it is provided to first select all entries of the digital map data record in a defined perimeter around the position information of the location information as candidate entries, which are examined in more detail. In this case, the radius can be defined, for example, as having a radius of 300 m to 1000 m, in particular 500 m. From these entries, the candidate entry most likely to describe the destination described by the location information is selected as a destination entry; if this is not possible, the position information of the location information can still be used, as it were as a fallback solution.

The procedure of the method according to the invention thus makes it possible to map as reliably as possible the position information of the location information to a suitable starting position, which is stored in the digital map data record, in order to guide the driver of the motor vehicle safely and comfortably to a suitable access point to his destination. In order to ensure that the driver is actually guided to his destination, the eligibility criterion specifies a minimum degree of agreement so that the destination of a candidate entry and the destination of a location information can still be assumed to be identical. This ensures that, if the destination described by the location information is not actually contained in the digital map data record, then no route guidance to the wrong destination takes place.

It should also be noted at this point that the position information and positions that are used in the method according to the invention should usually be geodetic positions, and therefore position information in a geodetic coordinate system. It should also be pointed out that options for giving a driver in the motor vehicle access to external sources for location information outside the motor vehicle are already known in the prior art and will not be discussed here in more detail. Thus, it is conceivable that the motor vehicle itself has a connection to the Internet, for example via a mobile radio network, and on the part of the motor vehicle means, in particular software means, are provided in order to obtain access to data from the Internet, for example via a man-machine interface. Interface. However, it is also conceivable for a mobile terminal, for example a smartphone, to be connected to the motor vehicle via a communication link, for example being transmitted via a Bluetooth connection and the location information from this mobile terminal to the motor vehicle.

An advantageous development of the present invention provides that the entries of the digital map dataset at least partially metadata corresponding to at least a portion of the metadata of the location information or in addition to the starting position a metadata corresponding to the position information are assigned or assigned, wherein for determining the agreement information is a comparison of Metadata or the position of the location information with the corresponding metadata of candidate entries is done. Consequently, the comparison can fundamentally be made on the basis of corresponding additional partial information, for example of metadata, and / or on the basis of the respectively contained position information. For this purpose, it is conceivable in principle that digital map data sets are expanded in their entries by metadata, which often correspond to non-motor vehicle sources in location information with transmitted metadata; however, many available digital map data sets already contain such appropriate metadata. Specifically, it can be provided in this context that at least one address specification and / or at least one destination category and / or at least one destination designation are used as metadata. Incidentally, it is possible to prioritize or weight individual comparison results when determining the conformity information. In this case, the designation of the destination, that is to say the destination designation, for example the name of an establishment or a sports facility, can be rated higher. Also, the address or parts of the address information can be weighted higher among individual comparisons, while categories, for example, information such as "inn", "sports venue" and the like, often awarded different or designated.

The candidate entry with the highest degree of agreement does not necessarily always have to correspond to the desired destination described by the location information. This applies, for example, if several destinations with the same destination and similar / same addresses are close to each other, for example in the area of a "donkey forest" the sports stadium "Donkey Forest", the restaurant "Donkey Forest" and the like. After category names between the off-board source and the digital map data set may differ, it may come to a variety of possible candidates, so that a heavier identifiability arises.

Thus, a further development of the invention provides that in the case of a candidate entry of highest degree of agreement that satisfies a uniqueness criterion, a number of candidate entries fulfilling a selection criterion for the matching information and the admissibility criterion is combined into a selection list and displayed to the operator who selects the destination entry. This embodiment therefore provides, in the rare case in which the destination can not be identified with sufficient certainty in the digital map data record, to be interactively selected by the user as to which destination he has meant. Expediently, only candidate entries are available for selection, which also come into question with a certain security as destination, which is actually desired by the operator, which can be determined by the selection criterion. This allows multiple similar candidate entries to guide the operator to the correct destination.

Specifically, it can be provided that the uniqueness criterion is checked as to whether the degree of agreement of the candidate entry with the highest degree of agreement exceeds a first threshold value and / or is spaced from the next highest degree of agreement by a distance exceeding a second threshold value. Both circumstances are preferably reviewed. If it is true that the admissibility criterion is fulfilled but, for example, only extremely narrowly, and that other candidate entries fulfill the criterion of admissibility (extremely scarce), this can be seen as an indication of unclear attributability. However, this also occurs when, for example, a plurality of entries are found with a high, closely matched degree of agreement, as the case presented above illustrates for the example "Donkey Forest".

As a selection criterion, the exceeding of a third threshold for the degree of matching can be used. It may be expedient if the third threshold value can be selected dynamically such that a maximum number of candidate entries in the selection list is not exceeded. Thus, only the most relevant and most likely candidate entries are displayed to the operator in this way, allowing clear, understandable user guidance. Of course, the third threshold value is usually higher than a threshold selected, for example, for the admissibility criterion, or at least corresponds to it.

Appropriately, the position information of the location information can still be used in the context of the operation of the navigation system, even if a target position from the digital map data set is selected. For example, it can be provided that the position information of the location information is used to display the destination on a display device of the motor vehicle. At least for display, for example, in a navigation map, it may be appropriate to use the position information of the location information of the motor vehicle external source, since then the driver is made clear that is actually driven to the destination desired by him.

The location information may be received by a provider of an interactive internet card. Such Internet services are known for example under the name "Gogle maps". The location information supplied as an xml data set often contains a destination name, a category of the destination and a formatted address specification of the destination, in addition to a geodetic position indication. Other metadata which can only be evaluated to a limited extent in the context of the present invention may also be included, for example references to relevant images, references, web pages and the like.

In addition to the method, the invention also relates to a motor vehicle, comprising a navigation system with a control unit designed for carrying out the method according to the invention. All embodiments of the method according to the invention can be analogously transferred to the motor vehicle according to the invention, with which therefore also the already mentioned advantages can be obtained.

Further advantages and details of the present invention will become apparent from the embodiments described below and with reference to the drawing. Showing:

1 a route to a destination when using a position indication in a location information from an external vehicle source,

2 a way to the destination of the 1 when using the starting position,

3 a flow chart of the method according to the invention, and

4 an inventive motor vehicle.

1 and 2 explain the problem solved by the present invention in more detail. An operator in a modern motor vehicle selects a destination by retrieving a position indication containing location information from a motor vehicle external source, in particular an Internet map, and this position is used in a navigation system of the motor vehicle for the route guidance, there may be problems if more extensive destinations ("Points of Interest") to be approached. For Internet maps and the like, the center of the extended area occupied by the destination is often chosen as the representative geodetic position indication, as by 1 should be shown in more detail.

1 shows a highly abstracted and simplified map detail 1 an area around a destination 2 , here for example the exhibition hall with the name "Frankenhalle". The destination 2 obviously comprises a vast area and is available and selectable as a POI in an internet map, with the destination 2 in the Internet map the position information 3 , namely the center of the area, is assigned. Is from a navigation system of a motor vehicle, a route 4 for position indication 3 Planned as the target position, the motor vehicle is attempted to indicate the position 3 should move. This is obviously a section 5 the route 4 on off-road terrain not marked as part of the road network. The driver can in this way the intended, intended for motor vehicles and suitable access point, as the entry of the destination 2 assigned starting position 6 stored in the digital map data record of the navigation system, escape.

However, as in 2 shown, the approach position 6 used as the target position, the modified route would result 4 ' , which are exactly to the appropriate access point, ie the starting position 6 , leads.

Consequently, the method according to the invention provides for an operation of the navigation system in such a way that the location information transmitted from the vehicle-external source together with the position information 3 the same destination 2 assigned destination entry of the digital map data record can be identified, so that the starting position 6 that is included in the destination entry, can be used as a destination location. The inventive method to be carried out here is determined by the flowchart of 3 shown in more detail.

In a step S1, an operator selects the destination 2 selected, that means the position indication 3 Location information of the motor vehicle external source, present in the form of an internet map, containing metadata and information is used by the navigation system to describe the destination 2 provided. Relevant metadata are the position information in the location information 3 in this case, a name of the destination 2 (Destination name), an address of the destination 2 and a category of the destination 2 (in the example "exhibition hall") assigned.

In a step S2 then all the entries of the digital map data set of the navigation system, which are in a defined radius of 500 m to the position information 3 lying position information or starting positions 6 contained, selected as candidate entries. Incidentally, in the present case, positions in a geodesic coordinate system are considered, as is usual.

In a step S3, the candidate entries and the location information are compared, more precisely by comparison of partial information, from which a match information indicating match information is determined for each candidate entry. After each candidate entry in the digital map data record is also assigned a designation, an address and a category, the partial information is compared not only with position information of the location information and the candidate entries, but also with metadata, ie destination names with destination names, address information (in particular broken down by street, house numbers, Places and the like) with address information and destination categories with destination categories.

The comparison of step S3 may be done in basically known manners, for example using algorithms that compare strings and the like.

In a step S4, it is checked whether at least one candidate entry satisfies an admissibility criterion with respect to the matching information, and thus a minimum degree of agreement is given for at least one candidate entry. Other candidate entries are discarded in step S4. If no candidate entry fulfills the admissibility criterion, the process continues with a step S5, in which the position specification 3 the location information is set as a target position.

In a step S6, it is checked whether the candidate entry having the highest coincidence degree satisfies a uniqueness criterion. For this purpose, on the one hand checks whether a threshold for the degree of agreement is exceeded, thus the candidate entry of the location information is very similar, on the other hand, whether the distance of the highest degree of agreement to the next highest degree of agreement exceeds a second threshold, thus the candidate entry clearly enough from other candidate entries settles. If this is the case, in a step S7 the candidate entry with the highest match is selected as the destination entry; the approach position 6 of the destination entry is selected as the destination position (if the destination entry has no explicit approach position, the general position specification of the destination in the destination entry is to be understood as the approach position).

If the uniqueness criterion is not met, in a step S8 the remaining candidate entries are checked against a selection criterion and, if they fulfill this, added to a selection list. In this case, the selection criterion can be the exceeding of a third threshold value by the degree of agreement, wherein the third threshold value in the present case is selected dynamically such that a maximum number of candidate entries in the selection list is not exceeded.

In a step S9, the selection list of an operator is displayed, which selects the destination desired by him. The corresponding candidate entry is selected as the destination entry, and the destination position is defined in accordance with step S7.

Thus, now that in all cases a target position is present, thus a parameterization for the following technical function of the navigation system is present, as usual, the target guidance is performed to this target position by the navigation system in step S10. In step S11, however, when displaying a navigation map, as is generally known, for displaying the destination, the position information 3 the location information used.

4 finally shows a very simplified schematic diagram of a motor vehicle according to the invention 7 , This includes a navigation system 8th with a trained for carrying out the method according to the invention control device 9 , The navigation system 8th can be a display device 10 to control, for example, to display a navigation map and optionally a selection list. The navigation system 8th also has an interface 11 via which location information can be received from non-motor vehicle sources.

Claims (10)

Method for operating a navigation system ( 8th ) of a motor vehicle ( 7 ), wherein for determining a current target position of the navigation, a position indication ( 3 ) and metadata location information of a destination ( 2 ) from an external vehicle source, in particular the Internet, is taken into account, characterized in that when the location information is selected by an operator to determine the destination position e) candidate entries which have a starting position ( 6 ) and / or position information that is within a predetermined radius of the position ( 3 ) of the location information, from a digital map dataset of the navigation system ( 8th g) if at least one candidate entry fulfills an admissibility criterion evaluating the matching degree, from this at least one candidate entry a highest-concordance destination entry is selected and the approach position ( 6 ) of the target entry is selected as the target position, and h) otherwise the position information ( 3 ) of the location information is selected as the target position. A method according to claim 1, characterized in that the entries of the digital map data record at least partially at least a portion of the metadata of the location information corresponding metadata or in addition to the starting position ( 6 ) one of the position information ( 3 ) are added or assigned to the location information corresponding metadata, wherein for the determination of the match information, a comparison of the metadata or the position indication ( 3 ) of the location information with the corresponding metadata of the candidate entries. A method according to claim 2, characterized in that are used as metadata at least one address and / or at least one target category and / or at least one destination designation. Method according to one of the preceding claims, characterized in that in the case of a candidate entry of highest degree of agreement that satisfies a uniqueness criterion, a number of candidate entries fulfilling a selection criterion for the match information and the admissibility criterion is combined to form a selection list and displayed to the operator who selects the destination entry. A method according to claim 4, characterized in that it is checked as a uniqueness criterion, whether the degree of agreement of the candidate entry with the highest degree of agreement exceeds a first threshold and / or spaced by a second threshold exceeding distance from the next highest degree of agreement. A method according to claim 4 or 5, characterized in that as a selection criterion the Exceeding a third threshold is used for the degree of agreement. A method according to claim 6, characterized in that the third threshold is dynamically selectable such that a maximum number of candidate entries in the selection list is not exceeded. Method according to one of the preceding claims, characterized in that the position indication ( 3 ) of the location information for displaying the destination ( 2 ) on a display device ( 10 ) of the motor vehicle ( 7 ) is used. Method according to one of the preceding claims, characterized in that the location information is received from a provider of an interactive Internet card. Motor vehicle ( 7 ), comprising a navigation system ( 8th ) with a control device designed for carrying out a method according to one of the preceding claims ( 9 ).

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