EP2914933A1

EP2914933A1 - Apparatus, method and computer program for spatially representing a digital map section

Info

Publication number: EP2914933A1
Application number: EP13742613.6A
Authority: EP
Inventors: Indra-Lena KÖGLER; Benjamin Gross; Markus Hübner
Original assignee: Volkswagen AG
Current assignee: Volkswagen AG
Priority date: 2012-10-30
Filing date: 2013-07-24
Publication date: 2015-09-09
Also published as: KR101755134B1; US9500496B2; CN104736971B; CN104736971A; KR20150070240A; DE102012023481A1; US20150285654A1; WO2014067677A1

Abstract

Exemplary embodiments relate to a navigation apparatus (100) for spatially representing a digital map section around a geographical position on the earth's surface on the basis of digital geodata, wherein the digital geodata have height information, having the following features: a first input interface (110) for the digital geodata; a second input interface (120) for coordinates of the geographical position; a third input interface (130) for a perspective stipulation variable corresponding to a desired viewing direction of the position; a processor module (150) which is coupled to the first, second and third input interfaces and is adapted to determine a coordinate transformation of the geodata which corresponds to the desired viewing direction on the basis of the perspective stipulation variable and the geographical position and to assign different visual perception values to the geodata for different topological height values in order to obtain a projection of the geodata which can be visually perceived in different ways and corresponds to the height information; and an output interface (160) which is coupled to the processor module (150) and is intended to output output data corresponding to the projection of the geodata which can be visually perceived in different ways and corresponds to the height information.

Description

description

Apparatus, method and computer program for the spatial representation of a digital map section

Embodiments of the present invention are concerned with a

Navigation device for the spatial representation of a digital map section around a geographical position on the earth's surface based on digital geodesics, wherein the digital geodesics comprise altitude information.

Navigation devices for displaying travel or flight routes are known. Such navigation devices generally comprise a display device in the form of a display, on which a section of a road map can be displayed based on digital geodesics or topographical data. Usually, the display essentially shows the course of the roads and paths within the map section shown and features of the environment, such as outlines of adjacent buildings, urban areas or wooded areas. Conventionally, three-dimensional geodesics can be displayed two-dimensionally with navigation systems, but such known representations give no impression of a spatial plasticity.

There is thus a need to provide a navigation device with an improved display that provides the user with a sophisticated, spatially realistic

Perception of the displayed map section mediated.

This need is taken into account by a device, a method and a computer program for the spatial representation of a digital map section having the features of the independent patent claims.

Advantageous embodiments and further developments are the subject of the dependent claims.

According to a first aspect of the present invention, a navigation device is provided for the spatial representation of a digital map section around a geographical position on the earth's surface based on digital geodesics. Here are the digital geodetic or topographical data in addition to two-dimensional coordinates or position information in addition also height information. The navigation device comprises, according to embodiments, a first input interface for the digital geodesics, a second input interface for coordinates of the geographical position and a third input interface for one to a desired one

Viewing direction to the position corresponding perspective determination size. Furthermore, the navigation device comprises one with the first, second and third

Input interface coupled processor module. In this case, the processor module is set up or adapted to determine or calculate, based on the perspective setting variable and the geographical position, a coordinate transformation of the geodesics corresponding to the desired viewing direction. Furthermore, the processor module is set up or adapted to assign different visual perception values to the geodesics for different topological height values in order to obtain a visually differently perceptible or plastically acting projection of the geodesics corresponding to the height information. Furthermore, the

Navigation device an output interface coupled to the processor module for outputting output data corresponding to the visually different perceptible projection of the geodesics corresponding to the height information.

In other words, the processor module can be embodied, for example, by means of suitable programming and / or electrical circuitry, in order to modify or supplement the digital geodesics based on the input data obtained via the first, second and third input interfaces, such that one for a viewer of a display perceptible spatial plasticity of an electronic navigation map based on the output data.

According to embodiments, the first input interface can be realized, for example, as an access device to an electronic storage medium, in particular a CD-ROM, DVDROM or a hard disk storage on which the digital geodesics are stored. The coordinates of the geographical position of interest can be read in via the second input interface. This refers to the

geographic position, for example, to a current position of a vehicle in which the navigation device may be embedded. The geographical position as current vehicle position can be determined for example via a GPS device (GPS = Global Positioning System) and the second input interface to the

Processor module are passed. The geographical position can also be a represent desired user-specified target position. About the third

Input interface, the user can enter a desired viewing direction or a desired virtual viewing height, ie specify a perspective from which the user wants to view the geographical position on the electronic or digital map. Thus, the user may choose to view roads and their surroundings from a desired virtual altitude, for example, 100 meters above the vehicle. Based on the established perspective and the geographical position, the processor module determines a coordinate transformation or projection of the digital geodesics corresponding to the desired viewing direction. In this case, the digital geodesics by the processor module using

Scaling, rotating and moving image rendering techniques into a 2D or 3D perspective view, depending on the format of the original digital geodesics. The transformed due to the established perspective or

projected geodesics are further assigned by the processor module different visual perception values for different topological altitude values. In this way, the output data which encode a visually differently perceptible projection of the geodesics corresponding to the height information is obtained. The thus obtained output data can via an output interface to a

Display device for displaying the processed geodesics in the form of a plastically acting card output.

With the mentioned navigation device for the spatial representation of a digital

Map section may be provided to a user on a display device, in particular on a navigation display, a plastic representation of the surrounding streets and buildings and the surrounding railing relief, thereby allowing the user an improved assessment of its environment. Such a representation is particularly helpful when the vehicle is traveling at high speed or when visibility is poor.

According to some embodiments, in a navigation device for the spatial representation of a digital map section, the digital geodesics

have two-dimensional geodesics plus associated altitude values. This may be so-called 2Y ₂ D or 2.5D data in which each point in the map section shown has a height indication in addition to two-dimensional x- and y- or latitude and longitude coordinates. The 2.5D representation is particularly suitable for a perspective or plastic quasi-3D map display of the map section realize. However, vertical walls and overhangs are not modelable in this way. In the case of 2 ^_1/2 D geodesics the processor module can be set up and

to be adjusted based on the perspective setting size, e.g. the virtual altitude, and the geographical position, one to the desired

Viewing direction corresponding two-dimensional coordinate transformation or projection of the two-dimensional geodesics to determine, and the two-dimensional geodesics for different topographical height values different visual

Assign perceptual values, which despite a still two-dimensional representation of the transformed geodesics lead to the plastic viewing effect.

According to some embodiments, the digital geodesics can also be real

three-dimensional, i. with three-dimensional x, y, and z coordinates. In such cases, the navigation device may also include a fourth input interface for at least one corresponding to a desired virtual light source

Have light source setting size. The processor module may, in such cases, be arranged to adjust to the desired viewing direction based on the perspective setting amount and the geographical position

Corresponding three-dimensional coordinate transformation or projection of the

To determine geodesics. Further, the processor module may be arranged to associate different visual perceptual values with the three-dimensional geodesics for different topographical height values, and, depending on the resulting three-dimensional projection of the geodesics

Assign light source setting variable different light and shadow areas.

Via the fourth input interface of the navigation device input data can be read in, which model a virtual light source. These are

Input data is represented as a light source setting quantity, for example in the form of a vector. The light source setting quantity may include information about the height, the angle and / or the direction of the light source relative to the geographical position. Through a combination of the quantities obtained via the four input interface, in particular the height information, the perspective setting variable, predetermined visual perception values for the plasticity and the light source setting variable, a spatially realistic perception developed for the user can be generated.

Optionally, in a navigation device for the spatial representation of a digital map section according to an exemplary embodiment, the processor module is formed or be arranged to provide, in a viewing direction corresponding to an observation point behind and above the geographical position, a virtual horizon area in a region of the digital map which is defined by the

Coordinate transformation or perspective tilting of the original

Geodesics in a display area of geodesics is free. This is to be understood as meaning a display area that corresponds to one of the coordinate transformations

Tilting or twisting the original geodesics out of a pure plan view out. A pure plan view in particular on two-dimensional geodesics does not allow a plastically acting representation. According to embodiments, therefore, the geodesics are tilted, e.g. through a central projection. The tilting then results in a vacant image area that is no longer needed to display the tilted data. In this image area, therefore, a horizon area can be provided to reinforce the plastic impression, for example by appropriate coloring. By providing a horizon area in the digital map, it is possible to achieve a natural and realistic representation of the horizon, which gives an optical appearance of a curvature of the earth.

In order to generate the plastic impression, in a navigation apparatus for the spatial representation of the digital map section, the processor module may be adapted or adapted to associate the digital geodesics with a first digital color code for a first topological altitude value, and the digital geodesics for a second , If necessary, assign a second digital color code to adjacent height value, which preferably differs only slightly from the first digital color code. Thus, for different topological height values, different color codes may be provided as visual perceptual values which, in combination with the established perspective setting amount, produce perceptible plasticity of a navigation map. In this case, color codes associated with adjacent discrete height values may differ only slightly according to preferred embodiments to provide a "smooth" transition between adjacent ones

To get altitude values. This makes it possible to convey the overall impression of a possibly only two-dimensional navigation map with height differences without the complex technical implementation of an actual three-dimensional elevation model. By a combination of the color gradations defined by the color code for the representation of the different topological heights and possibly with the

Light source setting quantity can additionally play a light and shadow Elevation models and 3 D building models are generated, whereby a spatially realistic perception of the navigation map is taught.

The color code used can be, for example, an RGB color space, which as an additive color space reproduces the color perceptions by additive mixing of three primary colors, red, green and blue. Other color codes, such as the CMYK color model, can also be used to color different elevation values.

As an alternative to color codes can also be defined by means of a texture code

Textures, d. H. used on the surface of the images to be imaged images or patterns. In this case, in a navigation apparatus for spatially displaying a digital map section according to an embodiment, the processor module may be adapted to associate a first digital texture code with the digital geodesics for a first height value, and a second digital texture map for the second geographic area assign digital texture code. Using different textures to represent different topological height values is particularly beneficial for users with color weakness.

Since the calculation of the visual perception values for different topological height values by the processor module can result in a high computation effort, according to some embodiments, statically defined lookup tables can be used, into which digital visual fields corresponding to different height values

Perceptions stored are used. Therefore, optionally one

Navigation device for the spatial representation of a digital map section according to an embodiment, an electronic memory area with a therein

stored lookup table, in which at different height values corresponding digital visual perception values are stored.

By statically depositing visual perception values corresponding to different height values, in the course of determining the visually differently perceptible projection of the geodesics corresponding to the height information, complex calculations and thus a high memory consumption are made

avoided. Using lookup tables proves to be particularly advantageous in a rapidly changing environment, such as high travel speed, when updating the map section should be fast. Optionally, in a navigation device for the spatial representation of a digital map section according to an embodiment in the look-up table

be associated with different height values corresponding color codes, wherein an assignment for a tag representation of the digital map section with two-dimensional (or 2.5D) geodesics can be done according to the following assignment of RGB values to topological altitude values:

The height indication can be, for example, metric information, such as mm, cm, dm, m, or km. Other sizes, such as Yards, miles, etc. are also possible. The value "50 ± 50" means that the corresponding altitude value can be between 0 and 100 height units. "100 ± 50" means that the corresponding altitude value can be between 50 and 150 height units, etc. The color values can only be used as an example unsigned 8-bit values are displayed. In each case, the indication "± 30%" means that the corresponding color value may deviate upwards or downwards from the indicated mean value by up to 30% of the colorant value, and preferably the color values deviate by less than 20% and more preferably by less than 10%. of the color mean value from the specified average up or down.

Optionally, in a navigation device for the spatial representation of a digital map section according to an embodiment in the look-up table

be assigned to different height values corresponding color codes, so that an assignment for a night-time representation of the digital map section with two-dimensional geodesics according to the following assignment of RGB values to topological altitude values takes place: Height RGB

50 ± 50 26 ± 30% 31 ± 30% 24 ± 30%

100 ± 50 38 ± 30% 47 ± 30% 36 ± 30%

200 ± 100 57 ± 30% 67 ± 30% 56 ± 30%

500 ± 200 64 ± 30% 79 ± 30% 65 ± 30%

1000 ± 500 72 ± 30% 89 ± 30% 75 ± 30%

1500 ± 500 84 ± 30% 104 ± 30% 83 ± 30%

2000 ± 500 95 ± 30% 1 19 ± 30% 94 ± 30%

3000 ± 500 120 ± 30% 148 ± 30% 129 ± 30%

4000 ± 500 158 ± 30% 180 ± 30% 163 ± 30%

Optionally, in a navigation device for the spatial representation of a digital map section according to an embodiment in the lookup table to different height values corresponding color codes are stored, wherein an assignment for a tag representation of the digital map section with three-dimensional geodesics according to the following assignment of RGB values to topological Height values are:

8000 ± 500 193 ± 30% 198 ± 30% 171 ± 30%

Optionally, in a navigation device for the spatial representation of a digital map section according to an exemplary embodiment in the look-up table

be assigned to different height values corresponding color codes, wherein an assignment for a night representation of the digital map section with three-dimensional geodesics according to the following assignment of RGB values to topological altitude values is carried out:

In other words, such lookup tables provide a parameterization of the topological heights taking into account a day / night representation of the digital map section. The height-color assignments defined via the look-up tables can, according to some embodiments, be made available to a software and / or hardware-implemented graphics processor, for example in the context of a so-called application programming interface (API) application programming ").

In all previous height-color assignments, it can be seen that the color codes (RGB values) associated with the neighboring height values are so little different from one another that the viewer experiences a "flowing" color gradient impression (eg R, G, B values) of adjacent highs (which can be up to 1000 height units can not differ by more than 30% from each other. That is, 0.7 <(X [h ± 1] / X [h]) <1.3, where X [h ± 1] stands for a color value (eg R, G or B value) corresponding to a color value

Height index h adjacent height index h ± 1 corresponds.

Optionally, in a navigation device for the spatial representation of a digital map section according to an exemplary embodiment, the desired viewer perspective can be adjusted over an altered or variable perspective setting variable. The perspective setting variable can therefore be adjustable, for example by means of a human-machine interface of the navigation device. Optionally, the

Perspective setting size of a (virtual) height above the surface of the earth over which a viewing angle between the viewing direction and the earth's surface can be adjusted. In other words, the perspective setting quantity can be modeled as a zoom level of a (virtual) camera arranged in three-dimensional space, with the camera angle being set as the angle of view of the camera through the viewing angle.

Optionally, a navigation device for the spatial representation of a digital map section according to an exemplary embodiment in the electronic memory area can have a further look-up table stored therein, in which viewing angles corresponding to different height values are stored according to the following table:

175 km 69 ± 10%

200 km 72 ± 10%

300 km 78 ± 10%

400 km 81 ± 10%

500 km 84 ± 10%

600 km 87 ± 10%

1000 km 90 - 10%

1500 km 90 - 10%

2000 km 90 - 10%

2500 km 90 - 10%

Here too, according to some exemplary embodiments, height-angle assignment defined via the look-up table can be made available to a software and / or hardware-implemented graphics processor, for example as part of a so-called

Application Programming Interface (API),

German: "Application programming interface"), such as the OpenGL (Open Graphics Library), which is a specification for a platform and

programming language-independent programming interface for the development of 2D and 3D computer graphics. The indication "± 10%" in the above table each means that the corresponding viewing angle may deviate upwards or downwards by up to 10% of the mean angle of the indicated average, and preferably, the viewing angles are each less than 5% and more preferably about less than 2% of the angular mean value from the specified average up or down.

Thus, it becomes possible to define a perspective view of a map section at a viewing angle (determined by the user) relative to the earth. Of the

Viewing angle can be increased to show the map detail from above, which shows a larger area map. The increased viewing angle in the case of displaying a larger area map can improve the user's understanding of the geographic location environment.

In one development of the invention, a vehicle is further provided which comprises a navigation device for spatially displaying a digital map section around a geographic position on the earth's surface based on digital geodesics according to an exemplary embodiment, wherein the geographical position represents a current or a desired vehicle position. According to a further aspect, a method for the spatial representation of a digital map section around a geographic position on the earth's surface based on digital geodesics is provided, wherein the digital geodesics also comprise altitude information: The method comprises the following steps:

• reading the digital geodesics;

• reading the coordinates of the geographical position;

• Reading in to a desired viewing direction on the position

corresponding perspective setting variable;

• Determine one corresponding to the desired viewing direction, based on the perspective setting size and the geographical position

Coordinate transformation of the geodesics;

• Assign different visual perceptions to different ones

topographic height values of the geodesics in order to obtain a visually differently perceptible projection of the geodesics corresponding to the height information; and

• Output of output data, which is the height information

corresponding visually differently perceivable projection of the geodesics.

As has already been explained in connection with the navigation device, a navigation method according to an exemplary embodiment can also provide a user with a visual representation of the surrounding streets and buildings and of the surrounding railing relief to a user on a display device, in particular on a navigation display, thereby improving the driver's comfort Assessment of his environment can be made possible. Such a representation is particularly helpful when the vehicle is traveling at high speed or when visibility is poor.

Further, optionally, a computer program may be provided with a program code suitable for performing a method according to an embodiment when the computer program is executed on a programmable hardware component.

Embodiments of the present invention thus provide a sophisticated spatial elevation representation on a navigation map formed by combining

Height model, color gradation and the influence of light conveys a realistic spatial perception. In the process, a parameterization of viewing angles is decisive Viewing levels, in other words, a parameterization of camera angles on zoom levels, the color gradations for the representation of different topological heights and the light sources to create a play of light and shadow

Elevation models and three-dimensional objects on the spatially realistic

Perception of the navigation map.

Embodiments of the present invention will be explained below with reference to the accompanying figures.

Fig. 1 shows a schematic representation of a navigation device for spatial

Representation of a digital map section according to a

Embodiment;

Fig. 2 shows a schematic flow diagram of a method for spatial

Representation of a digital map section according to a

Embodiment;

Fig. 3a shows a look-up table, the different altitude values

assigning corresponding RGB values for a tag display of the digital map section with two-dimensional geodesics;

3b shows a look-up table, the different height values

assigning corresponding RG B values for a night representation of the digital map with two-dimensional geodesics;

Figures 3c-3d show color diagrams illustrating a color gradient between adjacent ones

Specify elevation sections in day / night representation for two-dimensional geodesics;

4a shows a plastic representation of a 21 D map section for a day

Representation with color gradations according to the lookup table of Fig. 3a;

FIG. 4b shows a three dimensional representation of a 2 ^_1/2 D card portion for a night view, with color shades corresponding to the lookup table of Figure 3b. shows a lookup table, the different elevation values

corresponding RG assigns B values for a tag display of the digital map section with three-dimensional geodesics; shows a lookup table, the different elevation values

assigns corresponding RGB values for a night display of the digital map section with three-dimensional geodesics; shows a look-up table in which corresponding viewing angles are stored at different elevation values; show color diagrams indicating a color gradient between adjacent height sections in day / night representation for three-dimensional geodesics; schematically shows a virtual light source; shows a look-up table for parameterization of a viewing direction; show a further embodiment of spatially plastic

Representations of a map section with three-dimensional geodesics; shows a plan view of a three-dimensional representation of a

Map detail with 2 ^_1/2 D geodesics; shows a plastic representation of a vehicle symbol and a section of a map with a plastic illustrated thereon

Vehicle icon; shows a plastic representation of a map section with a realistic horizon behavior; shows a lookup table for parameterizing horizons settings; Fig. 1 1 shows a map section, which by a combined use of

Colors, road widths, crowding and fading was generated;

FIGS. 12a-12f show clear navigation maps in all scales

combined use of colors, road widths, crowding and fading in and out;

Fig. 13 shows a plastic representation of large distances at the earth's surface; and

Fig. 14 shows an optical highlight of one-way streets on one

Note section.

In the following description of the accompanying drawings, like reference characters designate like or similar components. Further will be

use summary labels for components and objects that occur multiple times in one embodiment or in a representation, but are described together in terms of one or more features. Component or objects that are described by the same or in the same way with reference numerals may be identical in terms of individual, several or all features, for example their dimensions, but possibly also different, unless the description explicitly or implicitly results from the description.

1 shows a basic structure of a navigation device 100 for the spatial representation of a digital map section according to an embodiment in a schematic representation.

The navigation apparatus 100 comprises a first input interface 110, via which digital geodesics, that is to say information relating to locations or areas of the earth, are obtained. In particular, height information or values of the region of the earth's surface represented in the digital map section are also read in via the first input interface 110. According to exemplary embodiments, the digital geodesics are thus at least so-called 21 D or 2.5D data. Compared with pure 2-D data, where each point of the object in question requires two figures for its position at 2 ^_1/2 D is the third coordinate (ie the height) verspeichert only as an attribute, and not in a spatial structure. Typical examples of the 2 ^_1/2 D structures For example, rectangular coordinates plus a metric scalar (eg, height) are attributes to the point, or latitude / longitude plus any attribute (eg, terrain slope, gravity, vegetation, elevation, etc.). While it is in 2D point to data on a (flat or curved) surface, a quasi-space model can be constructed from 2 ^_1/2-D data, with the height z. B. a digital terrain model. Of course, the elevation information can also be part of a true 3D model, ie 3D geodesics. In contrast to 21 D, a true 3 D model also allows spatial correlations of all attributes or intersections of lines and surfaces in space. Examples of the latter are the

Solar radiation (as a function of slope and direction) or the intersection of geological layers with the terrain. For example, the first

Input interface 1 10 as a read drive for a digital 2Y ₂ D or 3D geodesics contained CD-ROM.

Via a second input interface 120 of the navigation device 100 can

Coordinates (e.g., latitude / longitude) of the geographic location, such as the current vehicle location, are read into the navigation system. The second

Input interface 120 may be used, for example, as a communication interface with a GPS locator (not shown) for determining the current one

Vehicle position to be executed.

A third input interface 130 of the navigation device 100 may be used to input a desired viewing direction or viewing height by the user to determine a perspective from which the user wishes to view the geographic location on a display device. Thus, the user may choose to view the roads and the environment from a desired (virtual) altitude, for example 100 meters above the vehicle or the earth's surface. In some embodiments, the virtual viewpoint may not only be above but always behind the vehicle position as well. The desired viewing height can then be converted to a viewing angle understood, for example, by a rendering program.

Via a fourth input interface 140 of the navigation device 100, optionally further input data can be read in, which model a (virtual) light source. In this case, these input data are represented as at least one light source setting variable, for example in the form of a vector. The light source setting size can give information about include the height, angle, intensity and / or direction of the light source relative to the geographic location to be displayed.

Furthermore, the navigation device 100 comprises a processor module 150, which can process the data entered via the four input interfaces 110, 120, 130, 140 electronically. Based on the perspective set size

Perspective and the geographic position, the processor module 150 may determine a corresponding to the desired viewing direction coordinate transformation or projection of the digital 2D or 3D geodata. The digital

Geodesics are converted by the processor module using image rendering techniques by scaling, rotation and translation into a perspective acting quasi-3D or SD view, for example by means of a central projection. This is an image that depicts points of three-dimensional space on points of a given plane. In order to enhance the resulting perspective or plastic effect, the geodesics transformed by the fixed perspective can also be given different visual perception values by the processor module 150, e.g. different colors, for different topological height values of digital 2.5D or 3D geodesics are assigned. In this case, for example, special predefined color tables can be used which provide a soft or flowing

Define color gradient between adjacent discrete height values. In this way, processor output data encoding a visually differently perceptible (perspective) projection of the geodesics corresponding to the height information is obtained. The output data thus obtained are output via an output interface 160 to a display device 170 of the navigation apparatus 100.

2 shows a flowchart of a method for the spatial representation of a digital map section according to an exemplary embodiment. The method may be a computer-implemented or -implementable method, the method steps of which can be performed by a computer or a programmable hardware component.

After a start of the method in step S200, first in step S201, the digital 2.5D or 3D geodesics are sent via the first input interface 110 of FIG

Navigation device 100 read. In step S202, the coordinates of the geographical position are read in via the second input interface 120. In this case, the steps S201 and S202 can be performed sequentially but also in parallel. In step S203 becomes at least one via the third input interface 130

Perspective setting variable that corresponds to a desired viewing direction on the geographical position. In one embodiment, the

Perspective setting variable represents a viewing height entered by the user. The viewing height indicates from which virtual height the user wants to view the environment around the geographical position. In other words, the viewing height corresponds to a zoom level of a virtual camera located in the room - the lower the viewing height the greater the zoom or magnification level. The input of the zoom level, for example, via input means (not shown) of the

Navigation device 100 take place. Conceivable is a realization by means of a

Rotary switch or by means of control panels on a touchscreen, via which the user can adjust the zoom level. A direct input of numeric values,

For example, via a keyboard and / or a touch screen, are also possible. In step S204, based on the perspective setting amount and the geographical position, one corresponding to the desired viewing direction

Coordinate transformation or projection of the 2D or 3D geodata determined. In step S205, different visual perception values (e.g., colors, textures, hatches, etc.) are assigned to different topographic height values of the geodesics to obtain a visually different perceptible transformation of the geodesics corresponding to the height information. In step S206, the processor module 150 outputs output data corresponding thereto, which correspond to the visually different perceivable projection of the geodesics corresponding to the different height information, to the display device 170 to obtain a graphic display of the processed geodesics.

In the case of 2D or 2 ^_1/2 D geodesics as input data in step S104 may be a predetermined viewing angle, that is, a camera angle, for example 30 ± 10, on all zoom levels are determined. In the case of 3D geodata as input data, different viewing angles depending on different

Zoom levels are taken into account, as will be explained below in connection with FIG. 6.

Figures 3a and 3b show lookup tables (LUT) 300 and 350, respectively

Assign corresponding RG B values as visual perceptual values to different height values for a tag display (see FIG. 3 a) or for one Night-view (see FIG. 3b) of the digital map section with only 2D or 2 ^_1/2 D geodesics.

The first or left column 302 of the tag representation 300 contains different altitude values in a predetermined altitude unit. This can represent a metric unit, such as m or km, or even Anglo-American units of measure, for example, yards or miles. The second column 304 of the look-up table in FIG. 3a shows color reproductions of the RGB color codes associated with the respective height values 302. The third, fourth and fifth columns 306, 308, 310 indicate the red, green and blue values of the color code used as RGB values. The last column 312 contains a

Transparency value (A value). The RGB values 306, 308, 310 and the transparency value 312 are given as integer values in a range between 0 and 255, corresponding to an exemplary 8-bit encoding.

Correspondingly, the first or left column 352 of the night display 350 contains different height values of the height unit. The second column 354 of the look-up table in FIG. 3b shows color reproductions of the RGB color codes assigned to the respective height values 352. The third, fourth and fifth columns 356, 358, 360 indicate the red, green and blue values of the color code used as RGB values. The last column 362 again contains a transparency value (A-value).

The individual color values (R, G, B) can each deviate upwards or downwards from the specified mean value by up to 30% of the colorant value shown in the tables. Preferably, the R, G, B color values even deviate upwards or downwards by less than 20% and more preferably by less than 10% of the colorant value from the indicated average. The height differences between adjacent altitude values are between 10 and 1000 height units.

FIG. 3 c shows the flowing color gradient 370 between neighboring height sections or values in the day representation according to FIG. 3 a for 2D and 21 D geodesics, respectively, as a function of height value versus checksum of the corresponding RGB value, ie one Sum over the individual R, G, B values. The abscissa axis indicates the adjacent discrete height values and the ordinate axis the cross sum of the associated color code value. As can be seen from the diagram in FIG. 3c, a flowing color gradient results between adjacent height sections, with a slight difference between the adjacent color tones. Also the cross sums In terms of height, adjacent color values preferably do not differ from each other by more than 30% of a cross sum.

FIG. 3d shows a corresponding flowing color gradient 380 for the night representation according to FIG. 3b. Neighboring altitude values are even lower here

Color difference on, as in the daytime presentation. That is to say, the transversal sums of color values adjacent to one another here preferably do not differ from each other by more than 20% of one of the adjacent color value transversal sums. This allows a realistic representation of the map section, which is aimed at the respective day / night conditions.

In the height-color relationships shown in FIGS. 3a and 3b, it can be seen that color codes (RGB values) associated with adjacent height values are so little different from one another that the viewer experiences a "flowing" color gradient impression. According to some embodiments, individual color values (eg R, G, B values) of adjacent higher values do not differ by more than 30% from one another, ie, 0.7 <(X [h ± 1] / X [h]) <1.3, where X [h ± 1] stands for a color value (eg R, G or B value) which corresponds to a height index h ± 1 adjacent to the height index h According to other embodiments, the cross sums of the differences No more than 30% of the color values of adjacent higher values, ie, 0.7 <(X [h ± 1] / X [h]) <1.3, where X [h ± 1] is a cross sum of a color value that corresponds to the height index h adjacent height index h ± 1

corresponds. Preferably, the difference is even less than 20%. In this case, according to one exemplary embodiment, the height values differ by at least 50 (meters) and at most by 1000 (meters).

FIG. 4a shows a plastic image resulting from the color table 300 of FIG. 3a

Representation of a map section 400 for a day representation, with color gradations according to the height-color assignment table of Fig. 3a. The card 400 shows differently colored areas. A dark area B2 corresponds to a higher environment, for example a mountain, like the Alps. The areas B1 and B3

on the other hand, indicate geographical environments of lesser topological heights and are shown lighter than the area B2 according to the first lines of the table shown in Fig. 3a. The area B4 at the upper edge of the picture represents a special color gradient, which serves to represent an artificial or virtual horizon, as will be described below in connection with FIG. 9. FIG. 4b shows a plastic representation of a map section 410 for a night display, with color gradations corresponding to the lookup table from FIG. 3b. Again, the flowing color gradient is clearly visible, but the differences between adjacent color areas B1, B2, B3 and B4 are even lower than in the day view of Fig. 4a, which corresponds to a realistic night-time perception. In addition, here higher areas B2 are shown brighter than in contrast lower areas B1 and B3.

If the digital geodesics are present as real 3D geodata, appropriately adapted lookup tables can be used for the parameterization of different topological height values, as shown in FIGS. 5a and 5b. Again, be here

differently differentiated color gradations for different height values in

Dependence of the day / resp. Night illustration used.

The first or left column 502 of the 3D tag representation 500 again contains different elevation values in a defined height unit. The second column 504 of the look-up table in FIG. 5a shows color reproductions of the RGB color codes associated with the respective height values 502. The third, fourth and fifth columns 506, 508, 510 respectively indicate the red, green and blue values of the color code used as RG B values. The last column 512 contains a transparency value (A value). The RG B values 506, 508, 510 as well as the

Transparency value 512 is again indicated as integer values in a range between 0 and 255, corresponding to an exemplary 8-bit encoding.

Accordingly, the first or left column 552 of the 3D night view 550 contains fewer elevation values than in the 3D day view 500. The second column 554 of the look-up table in FIG. 5 b shows color reproductions of the respective elevation values 552

associated RGB color codes. The third, fourth and fifth columns 556, 558, 560 respectively indicate the red, green and blue values of the color code used as RG B values. The last column 562 again contains a transparency value (A-value) which is maximum to also indicate the road network.

As in the case of 2D or 2 ^_1/2 D surveyors of the gradient between adjacent height values is also fluent in real 3D surveyors, so no hard edges on the

Navigation map arise in the transition between adjacent areas. Here, too, individual color values (eg R, G, B values) of adjacent higher values preferably differ by no more than 30% from one another. That is, 0.7 <(X [h ± 1] / X [h]) <1.3, where X [h ± 1] stands for a color value (eg R, G or B value) which corresponds to a height index h ± 1 which is adjacent to the height index h. In particular, the differ

Crossing the color values of adjacent highs by no more than 30% from each other. That is, 0.7 <(X [h ± 1] / X [h]) <1 .3, where X [h ± 1] is a cross sum of a color value corresponding to a height index h ± 1 adjacent to the height index h. Preferably, the color difference between adjacent height values is even less than 20%. In this case, according to one exemplary embodiment, the height values differ by at least 50 (meters) and at most by 1000 (meters). This is shown in FIGS. 5c and 5d, which correspond to FIGS. 3c and 3d and will therefore not be explained in any more detail.

In addition to the color gradations for the representation of the different topological heights, in the case of 3D geodata the viewing direction or the camera angle can be parameterized via zoom levels, as well as a virtual light source for generating a light and shadow play can be considered. This is shown schematically in FIG. 5e, which represents a virtual light source 590 and objects 592 illuminated therefrom. Depending on where the light source 590 is, there are places of light and shadow that give a plastic impression.

An example of a parameterization of the camera or observer angle over zoom levels is shown in the table 600 of FIG.

An angle of 90 corresponds to a viewing perspective of directly or very far above the geographical position, e.g. for viewer heights above 1000 km.

On the other hand, an angle of 0 corresponds to a viewing perspective from the geographical position, that is, in this case, the camera position coincides with the geographical position. A virtual viewer height of 30 m to 5 km may correspond to an angle of 34 °. From a height of 6 km to 1000 km, the

Gradually increase observer angle from 34 to 90. In other words, the camera can move around a fictional circle around the geographical position, the lower the viewing height, the flatter the camera angle.

FIG. 7a shows a plastic representation of a map section 700 for a tag display, with the parameterization of camera angles shown in FIG. 6 over the zoom levels and the color gradations corresponding to the lookup table from FIG. 5a. A plastic representation of a map section 710 for a night display, with the in Fig. 6, the parameterization of camera angles over the zoom levels as well as the color gradations corresponding to the lookup table from FIG. 5b is shown in FIG. 7b.

Compared with the exemplary embodiment shown in FIGS. 4 a and 4 b, in the case of the map sections 700 and 710 shown in FIGS

In addition, realistic perception of the navigation map is additionally enhanced by the use of a virtual light source, since objects which have a topological height are not only displayed in different colors, but also with a corresponding one

Shading. Thus, the map section in FIGS. 7a and 7b shows differently shaded areas B5 and B6 which point to mountains of different heights and thus can further improve a plastic representation.

For example, the virtual light source for a 3D rendering unit may be parameterized according to the following settings, e.g. may be specified as Extensible Markup Language (XML) code:

<lig tmode = "head" type = "directional" azimuth = "- 20" tilt = "30" ambient = "0.6"

squarebrightness- 'false' usage- 'defaulV />

Here, the parameter "light mode = head" means that the light source is fixed in space, regardless of the position of the virtual camera.The attribute "type = directional" describes that the light source has a mathematically infinite distance from the geometry and thus each Object of the rendering scene is illuminated from the same direction depending on azimuth and tilt (simulation of the sun), "azimuth" represents a rotation angle of the light source to a virtual zero point of the map display. "Tilt" determines a tilt angle of the light source, "ambient" describes The squarebrightness parameter is irrelevant because it is not used The usage parameter describes whether the light source described illuminates the general scenery or the Carsor (vehicle symbol) separately.

Another embodiment of a three-dimensional representation of a

Map section 720 shows Fig. 7c. In contrast to FIGS. 7a and 7b, a bird's eye view (ie observer angle 90) which appears vivid on the basis of color shades and possibly additional light / shadow effects is shown here. FIG. 8 shows, as a development of the present invention, a plastic representation 800 of a vehicle symbol 810 and a detail 830 of a map with a plastic vehicle symbol 810 shown thereon. The three-dimensional vehicle symbol 810 can be used to indicate the current vehicle position on the electronic vehicle

To mark navigation map. The vehicle icon 810 may be rendered as a 3-D model with a special inside bow offset from the navigation map.

Underneath, a semi-transparent gray bitmap 820 adapted to the 3-D vehicle model 810 may be drawn. In addition, a virtual light source is defined (not shown), which in the 3 D vehicle model 810, in particular in a virtual

Movement of the map creates a play of light and shadow. The combination of these three elements gives the impression of a plastic floating over the map

Vehicle symbol generated by the influence of the light and the underlying gray shadow 820 a special kind of depth effect.

In the plastic representation 800 of the vehicle symbol 810 shown in FIG. 8, the light source has been parameterized as an example according to the following settings:

<light mode = "head" type = "directional" azimuth = "80" tilt = "60" ambient = "0.5"

squarebrigh tness- 'false' usage = "carsor" l>

FIG. 9 shows a plastic representation of a map section 900 with a realistic-looking horizon behavior. The OpenGL rendering engine used to generate the map section 900 is capable of using a so-called FarPlane parameter or clipping plane parameter to locate a trailing edge 902 of the

Define the rendering area and enter it using predefined colors

Create horizon behavior. The mechanisms of the 3D engine can be combined to provide a natural and realistic representation of the horizon 904 by defining the far plane over all zoom levels and a gradient of the horizon 904, which gives the visual appearance of a curvature of the earth. The

Thus, according to some embodiments, processor module 150 is configured to provide, in a viewing direction corresponding to an observation point behind and above the geographical position, a horizon area 904 in a region of the digital map section that is freed by the coordinate transformation of the original geodesics. This can be seen in particular in the lower part of FIG. 9, in the left, the original untransformed geodesics are shown in a plan view and centrally and right different steep viewing directions, ie perspectives, by a Tilting of the spanned by the two-dimensional geodesics Erdorberfläche result.

In this case, the horizonteinstellungen according to the table shown in Fig. 10

be parameterized. Slight deviations, for example up to 10% from the values shown in FIG. 10, are possible. The parameters used are, in addition to zoom level 1002, scale factor 1004 and sky offset 1006. The parameter, scale factor 1004, sets a shift factor relative to that shown on the display

Map section stuck. The second parameter "sky offset" 1006 describes an absolute distance to a beginning of a fog, which is displayed below a horizon line, from the beginning of the screen edge.

Fig. 1 1 shows a map section 1 100 according to an embodiment, which was generated by a combined use of colors, road widths, crowding and fading in and out. According to some embodiments, a combination of colors, road widths, crowding, and fades is played in such a way that the viewer obtains an optimal map representation at all times, which contains all the information needed, is not overloaded, and which by skilful use of color contrasts always guarantees ideal readability and recognition of all important elements. To create such a representation, different attributes are used as follows.

Color values for elements such as streets and polygons are specified separately after inline and outline as RGBA values, eg. As highways, tunnels, bridges, federal highways, highways, local roads, pedestrian zones, ferry roads, industrial areas, built-up areas, seas, lakes, rivers, canals, parks, forests, cemeteries, borderlines,

Iron rail lines, routes, etc. Inline describes an area of a line object (for example, road), that is, the area that is between the two contour lines. The outline describes the contour line itself.

Visibility of elements such as streets, polygons, and text labels can be defined by the details of zoom scales, e.g. As highways, tunnels, bridges, federal highways, highways, local roads, pedestrian zones, ferry roads, industrial areas, built-up areas, seas, lakes, rivers, canals, parks, forests, cemeteries, borderlines,

Iron Bank routes, routes, one-way arrows, city names, street names,

Checkered flags, inscriptions of forests and waters, etc. Fonts of text labels can be defined by defining the font, font size, font color, thickness and color of the outline. City names, street names,

Road numbers, water names, forest names, tunnel names, island names, etc.

A displacement algorithm and a draw order are executed by establishing a fixed order for all representable elements. A configuration of the character width for streets and polygons is defined separately after inline and outline over all zoom levels by definition of pixel values, eg. As for highways, tunnels, bridges, highways, rural roads, local roads, pedestrian zones, ferry roads, routes, etc.

Figures 12a to 12f show various embodiments according to the attributes described above.

FIG. 12a shows a map section in a night representation, in which waters and city names are represented with a defined font, names of smaller cities are displaced, no roads are displayed, but country borders are indicated. That is, what is visible depends on the zoom level selected. The higher the zoom level, the more details can be seen.

FIG. 12b shows a top view of the map section shown in FIG. 12a in the form of a tag display. Again, waters and city names are represented with a defined font, names of smaller cities displaced, no roads are displayed, but country borders are displayed.

Fig. 12c shows a top view of a map portion in day view and higher zoom level, in which larger cities are represented with defined font, highways and roads in defined width and color are displayed for in and outline, road numbers and borderlines are shown, and all other elements are hidden.

FIG. 12 d shows a top view of a map section, which is still further enlarged in comparison with FIG. 12 c, in a day view, in which larger and smaller neighborhoods are shown with a defined font, motorways are displayed, connecting roads and local streets with defined width and coloring for inline and outline are displayed, built Areas, forests and waters are shown in a defined color, road numbers and points of interest (pole) are shown, and all other elements are hidden.

Fig. 12e shows a plan view of a map section in still further enlarged day representation, in which smaller neighborhoods and street names are represented with a defined font, local roads and side streets in a defined width and color are displayed for in and outline, built-up areas, forests and Waters are shown in a defined color, street numbers are shown, and all other elements are hidden.

12f shows a plastically acting map section in night representation in which street names are represented with a defined font, local streets and side streets are shown in defined width and coloring for in- and outline, built-up areas, forests and waters are shown in a defined color, One-way street arrows are shown according to a defined pattern, textured and untextured 3-D buildings are shown, and all other elements are hidden.

Another application of the present invention is the assessment of large scales and long distance routes. Thus, routes extending over large parts of the earth's surface can also be plastically represented, as shown in FIG. A wide zoom out allows a great overview. It can at

Embodiments of the globe are turned to explore the earth. Both a day and a night presentation or mode are possible.

Fig. 14 shows a mechanism of one-way optical highlighting on a navigation map by arranging grid tiles.

The features disclosed in the foregoing description, the appended claims and the appended figures may be taken to be and effect both individually and in any combination for the realization of an embodiment in its various forms.

Although some aspects have been described in the context of a device, it should be understood that these aspects are also a description of the corresponding device

Represent method, so that a block or a component of a device as a corresponding method step or as a feature of a method step to understand is. Similarly, aspects described in connection with or as a method step also represent a description of a corresponding block or detail or feature of a corresponding device.

Depending on particular implementation requirements, embodiments of the invention may be implemented in hardware or in software. The implementation may be performed using a digital storage medium, such as a floppy disk, a DVD, a Blu-Ray Disc, a CD, a ROM, a PROM, an EPROM, an EEPROM or FLASH memory, a hard disk, or other magnetic disk or optical memory are stored on the electronically readable control signals with a programmable hardware component such

cooperate or work together to carry out the respective procedure.

A programmable hardware component may be implemented by a processor, a

Computer processor (CPU = Central Processing Unit), a graphics processor

(GPU = Graphics Processing Unit), a computer, a computer system, a

application-specific integrated circuit (IC), an integrated circuit (IC), a system on chip (SOC) system, a programmable logic element or a field programmable gate array with a microprocessor (FPGA) = Field Programmable Gate Array).

The digital storage medium may therefore be machine or computer readable. Some embodiments thus comprise a data carrier which is electronically readable

Having control signals capable of interacting with a programmable computer system or a programmable hardware component such that one of the methods described herein is performed. One embodiment is thus a data carrier (or a digital storage medium or a computer-readable medium) upon which the program executes one of the methods described herein

is recorded.

In general, embodiments of the present invention may be described as a program,

Firmware, computer program or computer program product with a program code or be implemented as data, wherein the program code or the data is effective to perform one of the methods when the program on a Processor or a programmable hardware component. The program code or the data can also be stored, for example, on a machine-readable carrier or data carrier. The program code or the data may be present, inter alia, as source code, machine code or bytecode as well as other intermediate code.

A program according to an exemplary embodiment can implement one of the methods during its execution, for example, by reading out of these memory locations or by writing therein one or more data, as required

Switching operations or other processes in transistor structures, in amplifier structures or in other electrical, optical, magnetic or operating according to another functional principle components are caused. Accordingly, by reading a memory location, data, values, sensor values or other information can be detected, determined or measured by a program. A program can therefore by reading out one or more memory locations sizes, values, measurements and others

Collecting, determining or measuring information as well as initiating, initiating or carrying out an action by writing to one or more memory locations and controlling other devices, machines and components.

The embodiments described above are merely illustrative of the principles of the present invention. It will be understood that modifications and variations of the arrangements and details described herein will be apparent to others of ordinary skill in the art. Therefore, it is intended that the invention be limited only by the scope of the appended claims and not by the specific details presented in the description and explanation of the embodiments herein.

Claims

claims

1. Navigation device (100) for the spatial representation of a digital

Map around a geographic location on the surface of the earth based on digital geodesics, the digital geodesics having elevation information, having the following features:

a first input interface (1 10) for the digital geodesics;

a second input interface (120) for coordinates of the geographical

Position;

a third input interface (130) for one to a desired

Viewing direction corresponding to the position

Perspective fixing size;

a processor module (150) coupled to the first, second and third input interfaces and adapted to be based on

Perspective setting variable and the geographical position, to determine a coordinate transformation of the geodesics corresponding to the desired viewing direction and to assign different visual perception values to the geodesics for different topological height values, visually different according to the height information

to obtain a perceptible projection of the geodesics; and

an output interface (160) coupled to the processor module (150) for outputting output data indicative of the altitude information

corresponding visually differently perceivable projection of the geodesics.

The navigation device (100) of claim 1, characterized in that the digital geodesics have two-dimensional geodesics plus associated altitude values, and wherein the processor module (150) is adapted to, based on the perspective setting variable and the geographic position, one to the desired viewing direction corresponding two-dimensional

Coordinate transformation of the two-dimensional geodesics to determine and to assign the two-dimensional geodesics for different topographical height values different visual perception values.

3. Navigation device (100) according to claim 1, characterized in that the digital geodesics are three-dimensional, wherein the navigation device further a fourth input interface (140) for a light source setting quantity corresponding to a desired virtual light source, and wherein the processor module (150) is adapted to use, based on the

Perspective setting variable and the geographical position, corresponding to the desired viewing direction three-dimensional

Coordinate transformation of the geodesics to determine, and to the

attributing different visual perceptual values to three - dimensional geodesics for different topographical height values;

three-dimensional projection of geodesics depending on the

Assign light source setting variable different light and shadow areas.

4. Navigation device (100) according to any one of the preceding claims, characterized in that the processor module (150) is adapted, in a viewing direction corresponding to an observation point behind and above the geographical position, a horizon area (904) in an area of the digital Map section provided by the

Coordinate transformation of the original geodesics is free.

Navigation device (100) according to one of the preceding claims, characterized in that the processor module (200) is adapted to provide to the digital geodesists for a first height value (302; 352; 502; 552) a first digital color code (306; 308; 310; 356; 358; 360; 506; 508; 510; 556; 558; 560), and to provide the digital geodesists for a second altitude value (302; 352; 502; 552) with a second digital color code (306; 308; 310; 356; 358; 360; 506; 508; 510; 556; 558; 560).

6. Navigation device (100) according to claim 5, characterized in that height-wise adjacent discrete height values differ by up to 1000 height units, and in which sums of the color codes associated with the adjacent height values differ by less than 30%, in particular by less than 20%. to get a flowing gradient between adjacent altitude values.

7. Navigation device (100) according to one of the preceding claims, characterized in that the navigation device has an electronic Memory area with a look-up table (300; 350; 500; 550) stored therein in which digital visual perception values corresponding to different height values are stored.

8. Navigation device according to claim 7, characterized in that in the lookup table (300; 350; 500; 550) color codes corresponding to different height values are stored, for a tag display of the digital map section with two-dimensional geodesics according to

and / or for a night presentation of the digital map section with

according to two-dimensional geodesics

for a day view of the digital map section with three-dimensional geodesics according to Height RGB

-1000 ± 500 234 ± 10% 255 ± 10% 217 ± 10%

-200 ± 100 234 ± 10% 255 ± 10% 217 ± 10%

0 ± 50 209 ± 10% 229 ± 10% 197 ± 10%

50 ± 50 209 ± 10% 229 ± 10% 197 ± 10%

100 ± 50 187 ± 10% 206 ± 10% 176 ± 10%

200 ± 100 187 ± 10% 206 ± 10% 176 ± 10%

500 ± 200 149 ± 10% 170 ± 10% 140 ± 10%

1000 ± 500 123 ± 10% 145 ± 10% 1 14 ± 10%

1500 ± 500 102 ± 10% 124 ± 10% 103 ± 10%

2000 ± 500 93 ± 10% 1 12 ± 10% 95 ± 10%

3000 ± 500 1 12 ± 10% 1 17 ± 10% 92 ± 10%

4000 ± 500 134 ± 10% 140 ± 10% 1 10 ± 10%

5000 ± 500 158 ± 10% 165 ± 10% 130 ± 10%

6000 ± 500 193 ± 10% 198 ± 10% 171 ± 10%

7000 ± 500 193 ± 10% 198 ± 10% 171 ± 10%

8000 ± 500 193 ± 10% 198 ± 10% 171 ± 10% and / or for one night representation of the digital map with three-dimensional geodesics according to

9. Navigation device (100) according to any one of the preceding claims, characterized in that the desired viewer perspective is adjustable over an altered perspective setting size.

10. Navigation device (100) according to claim 9, characterized in that the perspective setting quantity corresponds to a height above the earth's surface over which a viewing angle between the viewing direction and the

Earth's surface is adjustable.

1 1. Navigation device (100) according to claim 10, characterized in that the navigation device in the electronic storage area has a further stored therein lookup table, in which at different height values corresponding viewing angles are stored according to the following table:

1500 km 90 - 10%

2000 km 90 - 10%

2500 km 90 - 10%

12. A vehicle comprising a navigation device (100) for the spatial representation of a digital map section around a geographical position on the

Earth surface based on digital geodesics, characterized in that the geographical position represents a current or a desired vehicle position.

13. A method for spatially displaying a digital map around a geographic location on the earth's surface based on digital geodesics, wherein the digital geodesics comprise altitude information, comprising the steps of:

Reading (S201) the digital geodesics;

Reading (S202) the coordinates of the geographical position;

Reading in (S203) a perspective setting amount corresponding to the position to a desired viewing direction;

Determining (S204), based on the perspective setting amount and the geographical position, one to the desired viewing direction

corresponding coordinate transformation of the geodesics;

Associating (S205) different visual perceptual values

different topographic elevation values of the geodesics to one to the

Height information corresponding visually differently perceptible

To obtain projection of the geodesics; and

Outputting (S206) output data corresponding to the visually different perceivable projection corresponding to the height information

Geodesics correspond.

14. The method according to claim 13, wherein the digital geodesics have two-dimensional geodesics plus associated height values and, based on the perspective setting variable and the geographical position, one corresponding to the desired viewing direction

Two-dimensional coordinate transformation of two-dimensional geodesics are determined to the two-dimensional geodesics for different topographic elevation values assign different visual perceptual values.

15. The method according to claim 13, characterized in that the digital geodesics are three-dimensional, one to a desired virtual light source

corresponding light source setting amount is read in, based on the perspective setting amount and the geographical position corresponding to the desired viewing direction three-dimensional

Coordinate transformation of geodesics is determined and to the

To assign three - dimensional geodesics for different topographic height values different visual perception values, and to the three - dimensional projection of the geodesics depending on the

Assign light source setting variable different light and shadow areas.

16. The method according to any one of claims 13 to 15, characterized in that in a viewing direction corresponding to an observation point behind and above the geographical position, a horizon area (904) is provided in a region of the digital map section, which by the

Coordinate transformation of the original geodesics is free.

17. Method according to one of claims 13 to 16, characterized in that the digital geodesists for a first height value (302; 352; 502; 552) have a first digital color code (306; 308; 310; 356; 358; 360; 506; 508; 510; 556; 558; 560) and the digital geodesists for a second altitude value (302; 352; 502; 552) having a second digital color code (306; 308; 310; 356; 358; 360; 506; 508; 510; 556; 558; 560).

18. Method according to claim 17, characterized in that adjacent discrete height values differ in height by up to 1000 height units, transverse sums of the color codes assigned to the adjacent height values differ by less than 30% from one another in order to obtain a flowing color gradient between adjacent height values.

19. The method according to claim 17, characterized in that in terms of height

distinguish adjacent discrete altitude values by up to 1000 height units, Transverse sums of the color codes associated with the adjacent altitude values differ less than 20% from one another to obtain a smooth color gradient between adjacent altitude values.

20. Method according to one of the preceding claims, characterized in that digital visual perception values corresponding to different height values are stored in an electronic memory area with a look-up table (300; 350; 500; 550) stored therein.

21. Method according to claim 20, characterized in that color codes corresponding to different height values are stored in the look-up table (300; 350; 500; 550) for a day representation of the digital map section with two-dimensional geodesics according to FIG

and / or for a night representation of the digital map section with two-dimensional geodesics according to

for a day view of the digital map section with three-dimensional geodesics according to

and / or for a night representation of the digital map section with three-dimensional geodesics according to

2000 ± 500 95 ± 10% 1 19 ± 10% 94 ± 10%

3000 ± 500 120 ± 10% 148 ± 10% 129 ± 10%

10000 ± 5000 158 ± 10% 180 ± 10% 163 ± 10%

22. The method according to any one of the preceding claims 13 to 21, characterized

characterized in that the desired viewer perspective is adjusted over a changed perspective setting size.

23. The method according to claim 22, characterized in that the

Perspective setting height of a height above the surface of the earth over which a viewing angle between the viewing direction and the

Earth's surface is adjusted.

24. Method according to claim 23, characterized in that a further look-up table stored therein is stored in the electronic memory area, in which viewing angles corresponding to different height values are stored according to the following table:

400 km 81 ± 10%

500 km 84 ± 10%

600 km 87 ± 10%

1000 km 90-10%

1500 km 90-10%

2000 km 90-10%

2500 km 90-10%

A computer program comprising program code for performing the method of any one of claims claims 13 to 24 when the computer program is executed on a programmable hardware component.