JPH11258976A - Storing method for raster type map - Google Patents

Abstract

PROBLEM TO BE SOLVED: To store raster type maps which are different in scale at the same time by providing layers corresponding to the raster type maps and storing the number of corresponding raster type maps, the range that the raster type maps correspond to, and the head addresses where the respective raster type maps are present and their dimensions. SOLUTION: In the raster map corresponding layers, the numbers of corresponding raster type maps, the ranges that the raster type maps correspond to in sheets, and the head addresses where the respective raster type maps are present and their dimensions are stored. For example, there are two raster type maps which are a magnified intersection map 101 and a photosensitive map 102. In this case, the read-in position and read-in dimensions of data to be displayed can be specified according to the head addresses where the raster type maps are present and their dimensions. The read-in dimensions can be specified as an area to be secured on a screen by being stored as a longitudinal and a lateral dimension on the screen. A detailed raster type map on a large scale can be displayed by setting the longitudinal and lateral dimensions large.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for storing map data in an on-vehicle navigation system, and more particularly to a method for storing a raster format map in relation to a vector format map.

[0002]

2. Description of the Related Art Conventionally, as a method of storing a vector format map and a raster format map, a method described in Japanese Patent Application Laid-Open No. 8-328524 is known. In an in-vehicle navigation system that displays a map on the screen, not only a vector format map but also a raster format map can be stored on a recording medium, and a system that can select either map on the screen or at the same time There is a system that displays both maps on top of each other or side by side.

FIG. 4 shows a method of storing a vector format map and a raster format map. The vector format map is followed by the leaf management information, followed by leaf 1, leaf 2. . . The map data is arranged in the order as follows. FIG. 5 shows the configuration of the figure. Fig. 1 is from small scale to large scale, Fig. 1, Fig. 2. . . Are numbered in that order. As shown in FIG. 4, the leaves are composed of layers such as a character layer, a background layer, and a raster map-compatible layer.

A raster format map is a series of data obtained by compressing a single bitmap format drawing in a specific format. The range corresponding to each drawing is unilaterally specified by the raster map corresponding layer in the vector format map.

FIG. 3 shows an example of a raster map corresponding layer in a conventional vector format map. In this case, the starting address and size of the raster format map corresponding to the raster map corresponding layer are stored. As a result, a raster road map in the same range as the vector map can be displayed.

[0006]

However, in the conventional method of storing a raster format map, since the size of one leaf of a vector format map corresponds to the size of one raster format map, It could only display a raster format map in the same area as the formal map. Therefore, in addition to a road map of the same scale, a raster-type map expressing complicated intersections and sightseeing spots on a large scale cannot be stored as it is.

Further, in the conventional method of storing a raster format map, only one type of raster format map can be supported in correspondence with a vector format map. Therefore, it was not possible to selectively display different types of raster maps such as a road map in a raster format, an aerial / satellite photograph, an enlarged view of a complicated intersection, and a sightseeing map.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to provide a method of storing a raster format map which can simultaneously store raster maps of different scales and different types of raster format maps. I do.

[0009]

In order to solve the above problem, the present invention provides a layer corresponding to a raster format map in a map leaf of a vector format map, and the number of the corresponding raster format maps. And the range corresponding to the raster format map, and the start address and size where each raster format map exists are stored. As a result, raster maps of different scales and different types of raster maps can be stored at the same time, and a raster map displaying complex intersections and sightseeing spots on a large scale is displayed in correspondence with the vector format map. Or display the position of the vehicle on a raster map.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a navigation system for displaying both a vector format map and a raster format map. A raster format map having a data structure for storing, as one of layers, information on the number of maps, the range in the map corresponding to the raster format map, and the start address and size in which the raster format map is stored, as one of the layers Raster maps with different scales and different types of raster maps can be classified at the same time, and raster maps that represent complex intersections and sightseeing spots on a large scale are displayed in correspondence with vector maps. Or display the position of the vehicle on a raster format map.

The invention according to claim 2 of the present invention has a data structure including a type for distinguishing the type of a raster format map as one layer in a leaf of a vector format map. 2. A method for storing a raster format map according to claim 1, wherein the raster format map is selectively displayed, wherein a map and image data such as a road map, an aerial photograph, a satellite photograph, an intersection enlarged map, and a sightseeing map are used. It has the effect that it can be displayed according to the taste of the person.

According to a third aspect of the present invention, when a plurality of raster-format maps are present in the same area of a vector-format map, the display contents are prioritized. This method has the function of displaying a map such as a road map, an aerial photograph, a satellite photograph, an enlarged intersection map, or a sightseeing map according to the user's preference.

Embodiment 1 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an example of a raster map corresponding layer according to the first embodiment of the present invention. A raster map-compatible layer exists for one leaf 100 in a vector format road map as in the past, but the content is different from the conventional. That is, the raster map corresponding layer in the present invention includes the number of corresponding raster format maps, the range corresponding to the raster format map in the map leaf, the start address and the size where each raster format map exists, and the like. Store it. In the example shown in FIG. 1, there are two raster format maps, an intersection enlarged view 101 and a tourist map 102. The corresponding range in the figure is a region surrounded by the coordinates of the lower left vertex and the coordinates of the upper right vertex. The read position and the read size of the data to be displayed can be specified based on the start address and the size of the raster map. By storing the read size as a vertical size × a horizontal size on the screen, it can be specified as an area to be secured on the screen. , By setting the size of height x width to be large,
A detailed and large-scale raster map can be displayed.

As described above, in the first embodiment, the position of the host vehicle on the raster format map is determined in correspondence with the position of the host vehicle in the vector format by associating the respective ranges and sizes of the vector format map and the raster format map. Can be displayed.

(Embodiment 2) By the way, as a raster format map corresponding to a vector format map, there are various types of data resources other than the above-described intersection enlarged map and sightseeing map. There are image data such as a raster format road map obtained by rasterizing a paper publication map, an aerial photograph, and a satellite photograph by remote sensing technology. Since there are a plurality of raster format data resources corresponding to the vector format map, the present invention provides a code for distinguishing those data resources.

FIG. 2 shows an example of a raster map corresponding layer according to the second embodiment of the present invention. Here, the first embodiment
2 shows an example in which data for a road map 103 and aerial / satellite photographs 104 are stored in addition to the raster format maps 101 and 102 in FIG. Here, A... (Raster format) road map B... Aerial photograph / satellite photograph C... Intersection enlarged view D .. sightseeing map (enlarged view).

As described above, in the second embodiment, by providing the type of the raster map, it is possible to select one type, for example, only the aerial photograph / satellite photograph, according to the user's preference. .

When a plurality of raster maps exist in the same area of the vector map, the display contents are displayed in a sightseeing map (enlarged view)> an intersection enlarged view> aerial photograph / satellite photograph> (raster format) road map. The data stored in the raster map corresponding layer can be configured so as to be selectively displayed in the priority order.

[0019]

As described above, the present invention provides a navigation system for displaying both a vector format map and a raster format map.
Data that stores the number of supported raster format maps, the range in the map corresponding to the raster format map, and the start address and size information where the raster format map is stored as one of the layers It has a structure that displays a raster map that represents complex intersections and sightseeing spots on a large scale, and displays the position of the vehicle on the raster map, corresponding to a vector map. It has the effect of being able to.

A data structure including a type for distinguishing the type of a raster type map (a road map, an aerial photograph, a satellite photograph, an enlarged intersection map, a sightseeing map, etc.) in one layer in a leaf of a vector format map. Has the effect that it is possible to selectively display only a raster type map of a preset type, or to display the type of data resource with a priority.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of a raster map corresponding layer according to the first embodiment of the present invention.

FIG. 2 is a schematic diagram illustrating an example of a raster map corresponding layer according to the second embodiment of the present invention.

FIG. 3 is a schematic diagram showing an example of a conventional raster map corresponding layer.

FIG. 4 is a schematic diagram showing a configuration of a vector format map and a raster format map.

FIG. 5 is a schematic diagram showing a configuration of a leaf of a vector format map.

[Explanation of symbols]

 100 Road Map in Vector Format 101 Enlarged View of Intersection in Raster Format 102 Raster Map in Map (Enlarged View) 103 Road Map in Raster Format 104 Aerial / Satellite Photo in Raster Format

Claims (3)

[Claims] 1. A navigation system for displaying both a vector format map and a raster format map, the number of corresponding raster format maps for each map leaf of the vector format map and the diagram corresponding to the raster format map. A method of storing a raster format map having a data structure for storing information on a range in a leaf, a start address and a size at which a raster format map is stored as one of layers. 2. One of the layers of a vector format map has a data structure including a type for distinguishing the type of the raster format map, and a raster type map of a predetermined type is selectively displayed. 2. The method of storing a raster format map according to claim 1, wherein: 3. A method for storing a raster format map according to claim 2, wherein when a plurality of raster format maps are present in the same area of the vector format map, the display contents are prioritized.