EP0473152A2
Expired / Lapsed
EP
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Topographical data construction system
Assignee: Sony Corp
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Filing: 1991-08-28
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Granted: —
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Expires: 2011-08-28
Abstract
Abstract In a topographical data construction system (1) in which altitude data is constructed on the basis of two dimensional topographical data (D2), and three dimensional topographical data (D3) is constructed on the basis of the two dimensional topographical data (D2) as constructed and the altitude data (DH), the altitude data (DH) to a plurality of optional representative points of topography respectively indicated by the two dimensional topographical data (D2) is set, division points is set among adjacent representative points of the plurality of representative points, a deviation is set on the basis of a distance from the division points to the representative points adjacent to the division points, data to indicate the height of the division points is constructed using a random number function on the basis of data indicating the height of the adjacent point and the deviation, the data indicating the height of the adjacent point is corrected on the basis of data (L1) indicating a border among land and sea, thereby the three dimensional topographical data (D3) is instructed.
Inventors
- 👤 Masaaki Oka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 15:32
CPC Classifications
G; G06; G06T; G06T1/00; G06T17/00; G06T17/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
182 words
A topographical data construction system (1) in which altitude data (DH) is constructed on the basis of two dimensional topographical data (D2), and three dimensional topographical data (D3) is constructed on the basis of the two dimensional topographical data (D2) as constructed and the altitude data (DH), comprising: inputting means for inputting altitude data corresponding to a plurality of optional representative points of a topography which is represented by two dimensional topographical data (D2); division point setting means for setting division points among the adjacent representative points of the plurality of representative points; deviation setting means for setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; constructing means for constructing data to indicate the height of the division points using a random number function on the basis of a data representing the height of the adjacent point and the deviation; and correcting means for correcting the data to indicate the height of the division points on the basis of data (L1) representative of a border among land and sea.
Claim 2
Dependent Claim
182 words
A topographical data construction system (1) in which altitude data (DH) is constructed on the basis of two dimensional topographical data (D2), and three dimensional topographical data (D3) is constructed on the basis of the two dimensional topographical data (D2) as constructed and the altitude data (DH), comprising: inputting means for inputting altitude data corresponding to a plurality of optional representative points of a topography which is represented by two dimensional topographical data (D2); division point setting means for setting division points among the adjacent representative points of the plurality of representative points; deviation setting means for setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; constructing means for constructing data to indicate the height of the division points using a random number function on the basis of a data representing the height of the adjacent point and the deviation; and correcting means for correcting the data to indicate the height of the division points on the basis of data (L1) representative of a border among land and sea.
Claim 3
Dependent Claim
31 words
A topographical data construction system according to claim 1, further comprising: two dimensional topographical data construction means for constructing two dimensional topographical data from a picture obtained by imaging a map.
Claim 4
Dependent Claim
33 words
A topographical data construction system according to claim 1, further comprising: coastline pattern data construction means constructing data indicating the border among land and sea from the picture obtained by imaging a map.
Claim 5
Dependent Claim
174 words
A topographical data construction system in which altitude data is constructed on the basis of two dimensional topographical data, and three dimensional topographical data is constructed on the basis of the two dimensional topographical data as constructed and the altitude data, comprising: inputting means for inputting altitude data corresponding to a plurality of optional representative points of a topography which is represented by two dimensional topographical data; division point setting means for setting division points among the adjacent representative points of the plurality of representative points; deviation setting means for setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; constructing means for constructing data to indicate the height of the division points using a random number function on the basis of a data representing the height of the adjacent point and the deviation; and correcting means for correcting the data to indicate the height of the division points on the basis of data representative of a border among land and sea.
Claim 6
Dependent Claim
174 words
A topographical data construction system in which altitude data is constructed on the basis of two dimensional topographical data, and three dimensional topographical data is constructed on the basis of the two dimensional topographical data as constructed and the altitude data, comprising: inputting means for inputting altitude data corresponding to a plurality of optional representative points of a topography which is represented by two dimensional topographical data; division point setting means for setting division points among the adjacent representative points of the plurality of representative points; deviation setting means for setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; constructing means for constructing data to indicate the height of the division points using a random number function on the basis of a data representing the height of the adjacent point and the deviation; and correcting means for correcting the data to indicate the height of the division points on the basis of data representative of a border among land and sea.
Claim 7
Dependent Claim
42 words
A topographical data construction system according to claim 4, wherein said predetermined function is expressed by following equation; where, gauss random represents Gaussian distribution random number, i represents the number of repetition of the division, and k and h represent coefficients predetermined.
Claim 8
Independent Claim
146 words
A method for constructing three dimensional topographical data on the basis of two dimensional topographical data and altitude data which is constructed on the basis of the two dimensional topographical data comprising steps for: (a) setting the altitude data to a plurality of optional representative points respectively indicated by said two dimensional topographical data; (b) setting division points among adjacent representative points of the plurality of representative points; (c) setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; (d) constructing data to indicate the height of the division points using a random number function on the basis of data indicating the height of the adjacent point and the deviation; (e) correcting the data to indicate the height of the division points on the basis of data indicating a border among land and sea.
Claim 9
Independent Claim
146 words
A method for constructing three dimensional topographical data on the basis of two dimensional topographical data and altitude data which is constructed on the basis of the two dimensional topographical data comprising steps for: (a) setting the altitude data to a plurality of optional representative points respectively indicated by said two dimensional topographical data; (b) setting division points among adjacent representative points of the plurality of representative points; (c) setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; (d) constructing data to indicate the height of the division points using a random number function on the basis of data indicating the height of the adjacent point and the deviation; (e) correcting the data to indicate the height of the division points on the basis of data indicating a border among land and sea.
Claim 10
Independent Claim
163 words
A method for constructing three dimensional topographical data on the basis of two dimensional topographical data and altitude data which is constructed on the basis of the two dimensional topographical data comprising steps for: (a) setting the altitude data to a plurality of optional representative points respectively indicated by said two dimensional topographical data; (b) setting division points among adjacent representative points of the plurality of representative points; (c) setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; (d) constructing data to indicate the height of the division points using a random number function on the basis of data indicating the height of the adjacent point and the deviation; (e) correcting the data to indicate the height of the division points on the basis of data indicating a border among land and sea. (f) repeating from said step (b) to step (f) using said division points as said representative points.
Claim 11
Independent Claim
163 words
A method for constructing three dimensional topographical data on the basis of two dimensional topographical data and altitude data which is constructed on the basis of the two dimensional topographical data comprising steps for: (a) setting the altitude data to a plurality of optional representative points respectively indicated by said two dimensional topographical data; (b) setting division points among adjacent representative points of the plurality of representative points; (c) setting a deviation on the basis of a distance from the division points to the representative points adjacent to the division points; (d) constructing data to indicate the height of the division points using a random number function on the basis of data indicating the height of the adjacent point and the deviation; (e) correcting the data to indicate the height of the division points on the basis of data indicating a border among land and sea. (f) repeating from said step (b) to step (f) using said division points as said representative points.
References Cited (Backward Citations)
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