MAP DATA RECORDING DEVICE, MAP DISPLAY, MAP DATA RECORDING METHOD, MAP DISPLAY METHOD, MAP DATA RECORDING PROGRAM, MAP DISPLAY PROGRAM, AND RECORDING MEDIUM

摘要

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).