System and method for synchronizing raster and vector map images
DCFirst Claim
1. A method for synchronizing map images using a data processing system, comprising the steps of:
- displaying a first map image and a second map image;
responsive to a user input, changing the first map image to display a modified first map image, wherein the modified first map image displays a new region;
determining, in an internal coordinate set, at least one boundary of the modified first map image using a georeferencing function of the first map image;
calculating a geographic coordinate set from the internal coordinate set; and
changing the second map image to display a modified second map image which corresponds to the modified first map image using a georeferencing function of the second map image, the modified second map image having at least one boundary with the same geographic coordinates of the boundary of the modified first map image,whereby the first map image and second map image are simultaneously changed according to the user input.
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Abstract
A system and method for coordinated manipulation of multiple displayed maps, even when the maps use different internal coordinate systems. According to this embodiment, each map image to be displayed is first georeferenced, to provide a set of conversion functions between each map'"'"'s internal coordinate system and a geographic coordinate system, which is latitude/longitude in the preferred embodiment. After this is done, any point on each map can be referenced using the geographic coordinate set. Since this is the case, the maps can now be manipulated, edited, and annotated in a synchronized manner, by defining the manipulations in terms of the geographic coordinate system, and using the georeferencing functions to translate the manipulation to each map'"'"'s internal coordinate system.
144 Citations
12 Claims
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1. A method for synchronizing map images using a data processing system, comprising the steps of:
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displaying a first map image and a second map image; responsive to a user input, changing the first map image to display a modified first map image, wherein the modified first map image displays a new region; determining, in an internal coordinate set, at least one boundary of the modified first map image using a georeferencing function of the first map image; calculating a geographic coordinate set from the internal coordinate set; and changing the second map image to display a modified second map image which corresponds to the modified first map image using a georeferencing function of the second map image, the modified second map image having at least one boundary with the same geographic coordinates of the boundary of the modified first map image, whereby the first map image and second map image are simultaneously changed according to the user input. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for synchronizing map images using a data processing system, comprising:
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means for displaying a first map image and a second map image; means for changing the first map image to display a modified first map image, wherein the modified first map image displays a new region; means for determining, in an internal coordinate set, at least one boundary of the modified first map image using a georeferencing function of the first map image; means for calculating a geographic coordinate set from the internal coordinate set; and means for changing the second map image to display a modified second map image which corresponds to the modified first map image using a georeferencing function of the second map image, the modified second map image having at least one boundary with the same geographic coordinate set of the boundary of the modified first map image, whereby the first map image and second map image are simultaneously changed according to the user input. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification