Database comprising topographical information on obstacles and method for generating one such database
First Claim
1. A method of generating a database comprising topographical information on obstacles being distributed over a geographic area, said geographic area being subdivided in the database into several geographic region levels, comprising the following steps:
- (a) reading topographical data obtained from heterogeneous data source;
(b) generating by a processor topographical data relating to pointlike obstacles from the data collected in the step (a);
(c) generating by a processor topographical data relating to linear obstacles from the data collected in the step (a);
(d) creating an obstacle database;
each cell containing a link to the obstacles, each coordinate of said obstacles in the geographic area covered by said cell being recorded with an uncertainty value.
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Abstract
The invention relates to a database and a method of generating a database containing topographical information on obstacles distributed over a geographic area subdivided into cells. The method includes reading topographical data obtained from heterogeneous sources. Topographical data are generated which relate to pointlike obstacles from the information collected from the topographical data. Topographical data are generated which relate to linear obstacles from the information collected from the topographical data. The obstacle database is created. Each cell contains a link to the obstacles whose coordinates in the geographic area covered by the cell are recorded with an uncertainty value. In particular, the invention applies to the generation of a database on board an aircraft.
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Citations
13 Claims
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1. A method of generating a database comprising topographical information on obstacles being distributed over a geographic area, said geographic area being subdivided in the database into several geographic region levels, comprising the following steps:
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(a) reading topographical data obtained from heterogeneous data source; (b) generating by a processor topographical data relating to pointlike obstacles from the data collected in the step (a); (c) generating by a processor topographical data relating to linear obstacles from the data collected in the step (a); (d) creating an obstacle database; each cell containing a link to the obstacles, each coordinate of said obstacles in the geographic area covered by said cell being recorded with an uncertainty value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
each node comprising a link to all lower-level nodes included in the same geographic region and comprising at least one obstacle.
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7. The method as claimed in claim 6, wherein each node corresponding to a cell comprises:
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information on the number of pointlike obstacles present in the corresponding cell; information on the number of linear obstacles present in the corresponding cell; pointers to tables comprising information on the obstacles present in the corresponding cell.
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8. The method as claimed in claim 1, comprising a step for generating description tables of the obstacles database, the description tables comprising information relating to the database.
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9. A non-transitory computer-readable medium comprising:
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a processor configured to generate topographical information on obstacles, the obstacles being distributed over a geographic area, said geographic area being subdivided into several geographic region levels comprising cells, the topographical information on obstacles comprising; at least one Cells table comprising a line for each cell of the geographic area; at least one Pointlike obstacles table comprising a line for each pointlike obstacle of the geographic area, said pointlike obstacle table comprising fields for specifying coordinates and height of the pointlike obstacles; at least one Linear obstacles table comprising a line for each linear obstacle of the geographic area, said linear obstacle table comprising fields for specifying coordinates and height of the ends of the linear obstacles, each line of the Linear obstacles table comprising links to at least two lines of the Pointlike obstacles table; each line of the Cells table comprising links to the obstacles present in the corresponding cell. - View Dependent Claims (10, 11, 12, 13)
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Specification