MAP DATA RECORDING DEVICE, MAP DISPLAY, MAP DATA RECORDING METHOD, MAP DISPLAY METHOD, MAP DATA RECORDING PROGRAM, MAP DISPLAY PROGRAM, AND RECORDING MEDIUM
1 Assignment
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Accused Products
Abstract
In a map data recording device (100), a setting section (104) sets a group by combining parcel data so that the total amount of data is within the upper limit value acquired by an upper limit data amount acquiring section (102) or the total number of pieces of data is within the upper limit number of pieces acquired by an upper limit number-of-pieces of data acquiring section (103). A compression section (105) then groups the parcel data for compression and a recording control section (106) records it on a recording section (101). Further, in a map display (110), a reading section (112) reads the parcel data in a group unit from the recording section (101) and extends the parcel data read by an extension section (113). A display control section (114) then controls a display section (111) and selects parcel data included in a display range from the extended parcel data to display it on the display section (111).
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Citations
27 Claims
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1-14. -14. (canceled)
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15. A map-data recording device that records map data in a recording unit, wherein the map data are constituted by parcel data divided into meshes, the map-data recording device comprising:
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a maximum-data-amount obtaining unit that obtains a value indicating a maximum data amount; a setting unit that sets a group by combining the parcel data such that a total amount of data is within the maximum data amount; a compressing unit that collectively compresses the parcel data in units of groups; and a recording control unit that controls the recording unit to record thereto, the parcel data compressed by the compressing unit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A map-data recording method for a map-data recording device that records map data in a recording unit, wherein the map data are constituted by parcel data divided into meshes, the map-data recording method comprising:
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obtaining a value indicating a maximum data amount; setting a group by combining the parcel data such that a total amount of data is within the maximum data amount; compressing collectively the parcel data in units of groups; and controlling the recording unit to record thereto, the parcel data compressed at the compressing. - View Dependent Claims (25, 26, 27)
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Specification