> For the complete documentation index, see [llms.txt](https://docs2.stlogic.co.kr/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs2.stlogic.co.kr/4.md).

# 4. OGC 표준

- [공간데이터 종류](https://docs2.stlogic.co.kr/4/1.md)
- [자료 표현방식](https://docs2.stlogic.co.kr/4/2.md): WKT, WKB
- [공간데이터 연산](https://docs2.stlogic.co.kr/4/3.md)
- [웹 기반 서비스 표준](https://docs2.stlogic.co.kr/4/4.md)