Database correlatable chart generation system and method

• US 6,268,858 B1
• Filed: 09/08/1992
• Issued: 07/31/2001
• Est. Priority Date: 09/08/1992
• Status: Expired due to Fees

• Current Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Original Assignee: L-3 Communications Corporation (L3Harris Technologies, Inc.)
• Inventors: Nathman, Cheryl Kay, Whittington, Reed C.
• Primary Examiner(s): ZIMMERMAN, MARK K
• Application Number:
  US07/941,466
• Time in Patent Office: 3,248 Days
• Field of Search: 395/119, 395/135, 395/125, 395/129, 395/130, 395/122, 395/134, 395/127, 345/113, 345/419, 345/422, 345/425, 345/427, 345/429, 345/430, 345/434, 345/435, 364/420, 364/449, 382/157, 701/208, 701/211, 701/217
• US Class Current: 345/419
• CPC Class Codes: G06T 11/203 Drawing of straight lines or curves

Abstract

A method and system (10) for generating database correlatable navigational charts that precisely match the simulated terrain and cultural features of a non-real-world visual database (22). The method includes the steps of reading the visual database into a data structure (102), testing for necessary contour intervals (106), converting the planar locations of each of the areal, contour line, linear and point features of the visual database into a pre-selected scale, and plotting each of these visual database features.

Claims

1. A method of creating a hard copy database correlatable navigational chart from a non-real-world visual database stored as a computer file array which defines the terrain and cultural features of a simulated non-real-world environment, comprising the steps of:

reading said non-real-world visual database into a filtered data structure which includes coplanar polygonal areas, lineal routes, and point types to represent at least one block of terrain in said simulated non-real-world environment;

determining a number of contour intervals for said block of terrain in said simulated non-real-world environment;

testing said block of terrain for combinations of elevation levels to determine the need for and location of any contour lines;

determining shape coordinates for each of said point types;

converting planar locations of said coplanar polygonal areas, said contour lines, said lineal routes and said shape coordinates of said point types to a pre-selected scale; and

generating a hard copy of a navigational chart which is correlated to said non-real-world visual database by plotting each of said coplanar polygonal areas, said contour lines, said lineal routes, and said shape coordinates for each of said point types in accordance with said pre-selected scale.

2. The method according to claim 1, wherein said step of plotting each of said coplanar polygonal areas includes the step of filling the area within the outlines of said coplanar polygonal areas with a color which is indicative of a type of areal feature represented by each respective polygonal area.

3. The method according to claim 1, which further comprises selecting an icon shape from a library of icon shapes, and plotting the selected icon shape at a location defined by at least one of the shape coordinates.

4. The method according to claim 1, wherein said step of determining the shape coordinates for each of said point types includes the step of determining an orientation of said point types relative to a predetermined reference frame.

5. The method according to claim 1, wherein said plotting step includes the steps of plotting said coplanar polygonal areas at a first time, plotting said contour lines at a second time, plotting said lineal routes at a third time, and plotting said shape coordinates of said point types at different time.

6. A method of creating a hard copy database correlatable navigational chart from a non-real-world visual database stored as a computer file array which defines the terrain and cultural features of a simulated non-real-world environment, comprising the steps of:

reading said non-real-world visual database into a filtered data structure which includes coplanar polygonal areas, lineal routes, and point types to represent at least one block of terrain in said simulated non-real-world environment;

converting planar locations of said coplanar polygonal areas into a preselected scale, and creating a portion of the hard copy navigational chart by plotting each of said coplanar polygonal areas in accordance with said pre-selected scale;

determining a number of contour intervals for said block of terrain for said simulated non-real-world environment;

testing said block of terrain for combinations of elevation levels to determine a need for and location of any contour lines;

converting said contour lines into said pre-selected scale, and creating other portions of the hard copy navigational chart by plotting each of said contour lines in accordance with said pre-selected scale;

converting planar locations of said lineal routes into said pre-selected scale, and creating still other portions of the hard copy navigational chart by plotting each of said lineal routes in accordance with said pre-selected scale; and

determining shape coordinates for each of said point types, converting said shape coordinates to said pre-selected scale, and plotting each of said shape coordinates in accordance with said pre-selected scale on the hard copy navigational chart.

7. The method according to claim 6, wherein said step of plotting each of said coplanar polygonal areas includes a step of filling an area within the outlines of said polygonal areas with a color which is indicative of the type of areal feature represented by each respective coplanar polygonal area.

8. The method according to claim 6, wherein said step of determining the number of contour intervals for said block of terrain for said simulated environment includes the step of finding the minimum and maximum elevation in said block of terrain.

9. The method according to claim 6, wherein said step of testing said block of terrain for combinations of elevation levels to determine the need for and location of any contour lines includes the step of finding two points in said coplanar polygonal area that each have matching elevations.

10. The method according to claim 9, wherein said step of finding two points in said coplanar polygonal area that each have matching elevations includes the step of converting said points into said pre-selected scale.

11. The method according to claim 6, wherein said step of plotting each of said lineal routes includes a step of filling an area within the outlines of said lineal routes with a color which is indicative of the type of lineal feature represented by each respective lineal route.

12. The method according to claim 6, wherein said step of plotting each of said lineal routes includes a step of selecting one of a library of line widths which is indicative of a type of lineal feature represented by each respective lineal route.

13. The method according to claim 6, wherein said step of determining the shape coordinates for each of said point types includes a step of determining a orientation of said point types relative to a predetermined frame.

14. The method according to claim 6, wherein said step of plotting each of said shape coordinates includes a step of selecting a corresponding icon shape from a library of icon shapes which is indicative of a type of point feature represented by each respective point.

15. The method according to claim 6, wherein said step of plotting each of said shape coordinates includes the step of filling an area within outlines of said shape coordinates with a color which is indicative of a type of point feature represented by each respective point type.

16. The method according to claim 6, wherein said plotting step includes the steps of plotting said coplanar polygonal areas at a first time, plotting said contour lines at a second time, plotting said lineal routes at a third time, and plotting said shape coordinates of said point types at different time.