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°ø°£ ÂüÁ¶ ½Ã½ºÅÛÀ̶õ Áö¸®Àû (À§µµ-°æµµ), ÇÁ·ÎÁ§Æ®ÈµÈ(X,Y) ¶Ç´Â Áö½É(X,Y,Z) ÁÂÇ¥ ½Ã½ºÅÛÀÔ´Ï´Ù. ÁÂÇ¥ ½Ã½ºÅÛÀº ¿©·¯ °³ÀÇ ¿ÀºêÁ§Æ®·Î ±¸¼ºµË´Ï´Ù. °¢ ¿ÀºêÁ§Æ®´Â DATUM ¶Ç´Â UNIT¿Í °°Àº ´ë¹®ÀÚ Å°¿öµå¸¦ °¡Áö¸ç, °ýÈ£¾È¿¡ ½°Ç¥·Î ±¸ºÐÇÏ¿© Á¤ÀÇÇÑ ¿ÀºêÁ§Æ® ¸Å°³º¯¼öµéÀÌ µû¶ó ³ª¿É´Ï´Ù. ÀϺΠ¿ÀºêÁ§Æ®´Â ´Ù¸¥ ¿ÀºêÁ§Æ®µé·Î ±¸¼ºµÇ¹Ç·Î °á°ú°¡ ÁßøµÈ ±¸Á¶¸¦ °¡Áú ¼ö ÀÖ½À´Ï´Ù.
´ë°ýÈ£¸¦ »ç¿ëÇÏ´Â ÁÂÇ¥ ½Ã½ºÅÛÀÇ ¹®ÀÚ¿ Ç¥Çö½Ä¿¡ ´ëÇÑ EBNF(Extended Backus Naur Form) Á¤ÀÇ´Â ´ÙÀ½°ú °°½À´Ï´Ù(°ýÈ£ »ç¿ë¿¡ °üÇØ¼´Â À§ÀÇ ÁÖ ÂüÁ¶).
<coordinate system> = <projected cs> | <geographic cs> | <geocentric cs> <projected cs> = PROJCS["<name>", <geographic cs>, <projection>, {<parameter>,}* <linear unit>] <projection> = PROJECTION["<name>"] <parameter> = PARAMETER["<name>", <value>] <value> = <number>
µ¥ÀÌÅÍ ¼¼Æ®ÀÇ ÁÂÇ¥ ½Ã½ºÅÛÀº µ¥ÀÌÅͰ¡ ÇÁ·ÎÁ§Æ®ÈµÈ ÁÂÇ¥Àΰæ¿ì¿¡ PROJCS Ű¿öµå·Î ½Äº°µË´Ï´Ù(±âÇÏÇÐ ÁÂÇ¥ÀÎ °æ¿ì¿¡´Â GEOGCS·Î, Áö½É ÁÂÇ¥ÀÎ °æ¿ì¿¡´Â GEOCCS·Î). PROJCS Ű¿öµå µÚ¿¡´Â ÇÁ·ÎÁ§Æ®ÈµÈ ÁÂÇ¥ ½Ã½ºÅÛÀ» Á¤ÀÇÇÏ´Â ¸ðµç "Á¶°¢µé"ÀÌ ¼ö¹ÝµË´Ï´Ù. ¸ðµç ¿ÀºêÁ§Æ®ÀÇ Ã¹¹øÂ° Á¶°¢Àº Ç×»ó À̸§ÀÔ´Ï´Ù. ÇÁ·ÎÁ§Æ®ÈµÈ ÁÂÇ¥ ½Ã½ºÅÛ À̸§ Áï, Áö¸®Àû ÁÂÇ¥ ½Ã½ºÅÛ, ¸Ê °ø°£ ¹æ»ç, Çϳª ÀÌ»óÀÇ ¸Å°³º¯¼ö ¹× ¼±Çü Ä¡¼ö µÚ¿¡ ¿©·¯ ¿ÀºêÁ§Æ®µéÀÌ µû¶ó ³ª¿É´Ï´Ù. ÇÁ·ÎÁ§Æ®ÈµÈ ÁÂÇ¥ ½Ã½ºÅÛµéÀº ¸ðµÎ Áö¸®Àû ÁÂÇ¥ ½Ã½ºÅÛ¿¡ ±Ù°ÅÇϹǷÎ, ÀÌ Àý¿¡¼´Â ÇÁ·ÎÁ§Æ®ÈµÈ ÁÂÇ¥ ½Ã½ºÅÛ¿¡ ƯÁ¤ÀûÀÎ Á¶°¢µéÀ» ¸ÕÀú ¼³¸íÇÕ´Ï´Ù. ¿¹¸¦ µé¾î, NAD83 ±âÁØ»óÀÇ UTM Á¸ 10NÀº ´ÙÀ½°ú °°ÀÌ Á¤Àǵ˴ϴÙ.
PROJCS["NAD_1983_UTM_Zone_10N", <geographic cs>, PROJECTION["Transverse_Mercator"], PARAMETER["False_Easting",500000.0], PARAMETER["False_Northing",0.0], PARAMETER["Central_Meridian",-123.0], PARAMETER["Scale_Factor",0.9996], PARAMETER["Latitude_of_Origin",0.0], UNIT["Meter",1.0]]
À̸§ ¹× ¿©·¯ ¿ÀºêÁ§Æ®µé(±âÁØ, ÀÚ¿À¼± ¹× °¢µµ Ä¡¼ö)ÀÌ Áö¸®Àû ÁÂÇ¥ ½Ã½ºÅÛ ¿ÀºêÁ§Æ®¸¦ Â÷·Ê·Î Á¤ÀÇÇÕ´Ï´Ù.
<geographic cs> = GEOGCS["<name>", <datum>, <prime meridian>, <angular unit>] <datum> = DATUM["<name>", <spheroid>] <spheroid> = SPHEROID["<name>", <semi-major axis>, <inverse flattening>] <semi-major axis> = <number> (semi-major axis is measured in meters and must be > 0.) <inverse flattening> = <number> <prime meridian> = PRIMEM["<name>", <longitude>] <longitude> = <number>
NAD83»óÀÇ UTM Á¸ 10¿¡ ´ëÇÑ Áö¸®Àû ÁÂÇ¥ ½Ã½ºÅÛ ¹®ÀÚ¿.
GEOGCS["GCS_North_American_1983", DATUM["D_North_American_1983", SPHEROID["GRS_1980",6378137,298.257222101]], PRIMEM["Greenwich",0], UNIT["Degree",0.0174532925199433]]
UNIT ¿ÀºêÁ§Æ®´Â °¢µµ ¶Ç´Â ¼±Çü Ä¡¼ö¸¦ ³ªÅ¸³¾ ¼ö ÀÖ½À´Ï´Ù.
<angular unit> = <unit> <linear unit> = <unit> <unit> = UNIT["<name>", <conversion factor>] <conversion factor> = <number>
º¯È¯ Àμö´Â ´ÜÀ§´ç ¹ÌÅͼö(¼±Çü ´ÜÀ§ÀÇ °æ¿ì) ¶Ç´Â ¶óµð¾È ¼ö(°¢µµ ´ÜÀ§ÀÇ °æ¿ì)¸¦ ÁöÁ¤Çϸç ÀÌ´Â 0º¸´Ù Ä¿¾ß ÇÕ´Ï´Ù.
±×·¯¹Ç·Î UTM Á¸ 10NÀÇ Àüü ¹®ÀÚ¿ Ç¥Çö½ÄÀº ´ÙÀ½°ú °°½À´Ï´Ù.
PROJCS["NAD_1983_UTM_Zone_10N", GEOGCS["GCS_North_American_1983", DATUM[ "D_North_American_1983",SPHEROID["GRS_1980",6378137,298.257222101]], PRIMEM["Greenwich",0],UNIT["Degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"],PARAMETER["False_Easting",500000.0], PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",-123.0], PARAMETER["Scale_Factor",0.9996],PARAMETER["Latitude_of_Origin",0.0], UNIT["Meter",1.0]]
Áö½É ÁÂÇ¥ ½Ã½ºÅÛÀº Áö¸®Àû ÁÂÇ¥ ½Ã½ºÅÛ°ú À¯»çÇÕ´Ï´Ù.
<geocentric cs> = GEOCCS["<name>", <datum>, <prime meridian>, <linear unit>]