US6233521B1
Expired / Lapsed
US
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Map database apparatus
Assignee: Faurecia Clarion Electronics Co Ltd
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Filing: 1999-06-18
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Granted: 2001-05-15
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Expires: 2019-06-18
Abstract
Abstract A map database apparatus is provided in which: meshes that are achieved by dividing a map into a plurality of portions are used as management units; sets of data related to the meshes are stored in a specific order; a management table that manages the sets of data related to the meshes is provided; and the management table has a parameter that makes it possible to determine an access address of a set of data related to a mesh present in a surrounding area of a specific mesh through calculation based upon the specific mesh.
Inventors
- 👤 Takashi Nomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:11
CPC Classifications
G; G09; G09B; G09B29/00; G09B29/10; G09B29/106; G01; G01C; G01C21/00; G01C21/38; G01C21/3863; G01C21/387; G01C21/3878; G01C21/3881; G09B29/003
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A map database apparatus in which meshes that are achieved by dividing a map into a plurality of portions are used as management units, comprising: sets of data related to said meshes that are stored in a specific order; and a management table that manages said sets of data related to said meshes and has a parameter that makes it possible to determine an access address of a set of data related to a mesh present in a surrounding area of a specific mesh through calculation based upon said specific mesh.
Claim 2
Dependent Claim
91 words
A map database apparatus in which meshes that are achieved by dividing a map into a plurality of portions are used as management units, comprising: sets of data related to said meshes that are stored in a specific order; and a management table that manages said sets of data related to said meshes and has a parameter that makes it possible to determine an access address of a set of data related to a mesh present in a surrounding area of a specific mesh through calculation based upon said specific mesh.
Claim 3
Dependent Claim
25 words
A map database apparatus according to claim 1 , wherein: said parameter corresponds to data sizes of said sets of data related to said meshes.
Claim 4
Dependent Claim
80 words
A map database apparatus according to claim 1 , wherein: said map is divided longitudinally and laterally into a matrix; said sets of data related to said meshes are stored in an order in which said sets of data related to said meshes are arranged in a row direction; and said parameter comprises an address of a mesh positioned at a front end of a row and data sizes of sets of data related to meshes arranged in said row.
Claim 5
Dependent Claim
96 words
A recording medium recording a map database in which: meshes that are achieved by dividing a map into a plurality of portions are used as management units; sets of data related to said meshes are stored in a specific order; a management table that manages said sets of data related to said meshes is provided; and said management table has a parameter that makes it possible to determine an access address of a set of data related to a mesh present in a surrounding area of a specific mesh through calculation based upon said specific mesh.
Claim 6
Dependent Claim
96 words
A recording medium recording a map database in which: meshes that are achieved by dividing a map into a plurality of portions are used as management units; sets of data related to said meshes are stored in a specific order; a management table that manages said sets of data related to said meshes is provided; and said management table has a parameter that makes it possible to determine an access address of a set of data related to a mesh present in a surrounding area of a specific mesh through calculation based upon said specific mesh.
Claim 7
Dependent Claim
128 words
A navigation apparatus, comprising: a map database device in which meshes that are achieved by dividing a map into a plurality of portions are used as management units, sets of data related to said meshes are stored in a specific order, a management table that manages said sets of data related to said meshes is provided, and said management table has a parameter that makes it possible to determine an access address of a set of data related to a mesh present in a surrounding area of a specific mesh through calculation based upon said specific mesh; and a control device that performs route searching and controls a monitor to display a road map and a result of route searching by using database in said map database device.
Claim 8
Dependent Claim
128 words
A navigation apparatus, comprising: a map database device in which meshes that are achieved by dividing a map into a plurality of portions are used as management units, sets of data related to said meshes are stored in a specific order, a management table that manages said sets of data related to said meshes is provided, and said management table has a parameter that makes it possible to determine an access address of a set of data related to a mesh present in a surrounding area of a specific mesh through calculation based upon said specific mesh; and a control device that performs route searching and controls a monitor to display a road map and a result of route searching by using database in said map database device.
Claim 9
Dependent Claim
66 words
A map database apparatus according to claim 1 , wherein: said map is divided longitudinally and laterally into a matrix; said management table is constructed so that said management table corresponds to said matrix of meshes divided longitudinally and laterally and a mesh present in a surrounding area of a specific mesh can be recognized based upon information related to said matrix in said management table.
Claim 10
Dependent Claim
120 words
A navigation apparatus according to claim 5 , wherein: said map is divided longitudinally and laterally into a matrix; said management table is constructed so that said management table corresponds to said matrix of meshes divided longitudinally and laterally and a mesh present in a surrounding area of a specific mesh can be recognized based upon information related to said matrix in said management table; and said control device recognizes the mesh present in a surrounding area of said specific mesh based upon said information related to said matrix in said management table, obtains a parameter of said recognized mesh from said management table, and determines an access address of a set of data related to said recognized through calculation.
References Cited (Backward Citations)
JPS63136272A
Cited
JPH04313786A
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JPH04353680A
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JPH0728980A
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JPH0737073A
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JPH07271966A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-05-14 | 2004-11-13 | 2005-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-05-14 | 2008-11-13 | 2009-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-05-14 | 2012-11-13 | 2013-05-15 | $7700.00 | Window Closed / Lapsed |