A very robust mapping (non latitude and longitude manner, using a screen pixel mode), zoom, refresh double buffer programming function, which uses the data layer structure, it is worth reference for beginners.

TMAP
....\Delmp.bat
....\Mapdata
....\.......\China.Ini
....\.......\Count.txt
....\.......\Mainland.Ini
....\.......\River.Ini
....\.......\skfhainan.txt
....\.......\skfmainland.txt
....\.......\skftaiwan.txt
....\.......\skfyellowriver.txt
....\TGIS.cfg
....\TGIS.dof
....\TGIS.dpr
....\TGIS.exe
....\TGIS.res
....\Unit_Main.dcu
....\Unit_Main.ddp
....\Unit_Main.dfm
....\Unit_Main.pas
....\Unit_Main.res

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