OGC:Styled Layer Descriptor
The OpenGIS® Styled Layer Descriptor (SLD) Profile of the OpenGIS® Web Map Service (WMS) Encoding Standard 1 defines an encoding that extends the WMS standard to allow user-defined symbolization and coloring of geographic feature2 and coverage3 data. SLD addresses the need for users and software to be able to control the visual portrayal of the geospatial data. The ability to define styling rules requires a styling language that the client and server can both understand. The OpenGIS® Symbology Encoding Standard (SE) 4 provides this language, while the SLD profile of WMS enables application of SE to WMS layers using extensions of WMS operations. Additionally, SLD defines an operation for standardized access to legend symbols.
SLD는 사용자와 지리공간 데이터의 시각적 묘사를 제어할 수 있는 소프트웨어에 대한 필요성을 해결한다. 스타일 규칙을 정의하는 기능은 클라이언트와 서버가 모두 이해할 수 있는 스타일링 언어를 필요로 한다.
05-078r4_Styled_Layer_Descriptor_Profile_of_the_Web_Map_Service_Implementation_Specification.pdf