PROCESS AND APPARATUS FOR GENERATING MAP DATA IN REAL TIME

• US 20090051702A1
• Filed: 08/13/2008
• Published: 02/26/2009
• Est. Priority Date: 08/21/2007
• Status: Abandoned Application

• Current Assignee: Airbus Operations SAS (Airbus SE)
• Original Assignee: Airbus France
• Inventors: Morbey, Joao, Landman, Mathieu
• Application Number:
  US12/191,009
• Publication Number:
  US 20090051702A1
• Time in Patent Office: Days
• US Class Current: 345/629
• CPC Class Codes: G01C 21/3878 Hierarchical structures, e.g. layering
• CPC Class Codes: G09B 29/10 Map spot or coordinate position indicators; Map reading aids optical projection apparatus per se G03B

Abstract

The invention has in particular as an object the generation, in real time, of a background map on the basis of a plurality of electronic maps having different projection parameters and geodesic parameters. After at least two electronic maps have been selected (300, 800), at least part of these maps is converted (315) according to projection parameters and geodesic parameters predetermined as a function of projection parameters and geodesic parameters associated with each of these selected electronic maps. A background map is then constructed (325) on the basis of these converted electronic maps.

Claims

1. A method for constructing at least one background map in real time on the basis of a plurality of electronic maps, projection parameters and geodesic parameters being associated with each of the said electronic maps, this method being characterized in that it comprises the following steps,

selection (300, 800) of at least two electronic maps among the said plurality of electronic maps;

conversion (315, 815) of at least part of the said at least two selected electronic maps according to projection parameters and geodesic parameters predetermined as a function of projection parameters and geodesic parameters associated with each of the said at least two selected electronic maps; and

construction (325, 825) of a background map on the basis of the said at least two converted electronic maps.

2. A method according to claim 1, characterized in that it additionally comprises a step of adaptation of resolution (310, 810) of at least part of one of the said at least two selected electronic maps.

3. A method according to any one of the preceding claims, characterized in that the said conversion step comprises a step of orthographic azimuthal projection of at least part of the said at least two selected electronic maps.

4. A method according to any one of the preceding claims, characterized in that each of the said at least two converted electronic maps is represented on a separate graphic layer.

5. A method according to claim 1 or claim 2, characterized in that the said conversion step comprises the following steps,

projection of at least part of the said at least two selected electronic maps onto a sphere according to the projection parameters and the geodesic parameters associated with the said at least two selected electronic maps, referred to as first projection;

and

projection, onto a plane, of at least part of the said projection of at least part of the said at least two selected electronic maps onto a sphere, referred to as second projection.

6. A method according to the preceding claim, characterized in that the said second projection is an orthographic azimuthal projection.

7. A method according to any one of the preceding claims, characterized in that a priority level is assigned to each of the said at least two selected electronic maps.

8. A method according to any one of the preceding claims, characterized in that it additionally comprises a step of addition of at least one geo-localized datum.

9. A computer program comprising instructions adapted to the implementation of each of the steps of the method according to any one of the preceding claims.

10. A device comprising means adapted to implementation of each of the steps of the method according to any one of claims 1 to 8.