[Java] 좌표계간 변환 클래스

Daum OpenAPI에 있는 좌표계 변환 javascript 코드를 java로 포팅해 보았습니다...클래스를 jar 형태로 배포합니다...

라이센스는 Daum OpenAPI 라이센스를 따릅니다.

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지원되는 좌표계
tm, ktm, utm, congnamul, wgs84, bessel, wtm, wktm, wcongnamul
[code java]

public static final int COORD_TYPE_TM = 1;
public static final int COORD_TYPE_KTM = 2;
public static final int COORD_TYPE_UTM = 3;
public static final int COORD_TYPE_CONGNAMUL = 4;
public static final int COORD_TYPE_WGS84 = 5;
public static final int COORD_TYPE_BESSEL = 6;
public static final int COORD_TYPE_WTM = 7;
public static final int COORD_TYPE_WKTM = 8;
public static final int COORD_TYPE_WCONGNAMUL = 10;
[/code]

사용법
[code java]
import kr.hyosang.coordinate.*;

........

CoordPoint pt = new CoordPoint(126.97553009053178, 37.56456569639763); //서울시청
CoordPoint ktmPt = TransCoord.getTransCoord(pt, TransCoord.COORD_TYPE_WGS84, TransCoord.COORD_TYPE_KTM);

[/code]



서울 시청 위치를 기준으로 WGS84에서 각 좌표계로 변환 후 다시 WGS84로 변환해서 오차를 확인해 보니,
다음과 같이 결과가 나옵니다. 허용 오차 범위로 생각됩니다..


[TM]
Translate : 197768.4520399699, 451365.13194132084 Retranslate : 126.9755301111964, 37.56456569207776
Diff : 2.0664629118982702E-8, -4.319872459745966E-9

[KTM]
Translate : 309689.5976059905, 551860.9156454466 Retranslate : 126.9755301111964, 37.56456569207774
Diff : 2.0664629118982702E-8, -4.319886670600681E-9

[UTM]
Translate : 321201.5037010669, 4159430.7062740386 Retranslate : 126.9755300905307, 37.564565696397636
Diff : -1.0800249583553523E-12, 7.105427357601002E-15

[CONGNAMUL]
Translate : 494421.0, 1128413.0 Retranslate : 126.97552952196261, 37.56456630514921
Diff : -5.685691633061651E-7, 6.087515771469043E-7

[WGS84]
Translate : 126.97553009053178, 37.56456569639763 Retranslate : 126.97553009053178, 37.56456569639763
Diff : 0.0, 0.0

[BESSEL]
Translate : 126.97762994246017, 37.56176812268042 Retranslate : 126.9755301111964, 37.56456569207776
Diff : 2.0664629118982702E-8, -4.319872459745966E-9

[WTM]
Translate : 197838.10182558166, 451670.3995200698 Retranslate : 126.9755301111964, 37.56456569207776
Diff : 2.0664629118982702E-8, -4.319872459745966E-9

[WKTM]
Translate : 309496.6523318976, 552168.2631194722 Retranslate : 126.9755301111964, 37.56456569207776
Diff : 2.0664629118982702E-8, -4.319872459745966E-9

[WCONGNAMUL]
Translate : 494595.0, 1129176.0 Retranslate : 126.97552895866035, 37.56456569616303
Diff : -1.1318714285835085E-6, -2.345998950659123E-10