문서 보기역링크PDF로 내보내기맨 위로 이 문서는 읽기 전용입니다. 원본을 볼 수는 있지만 바꿀 수는 없습니다. 문제가 있다고 생각하면 관리자에게 문의하세요. # Concepts ## What's ArcSDE ### Storing Geopraphic Features in a SQL database ### Data Access <uml> object "Database\nConnection" as dbconn object "Spatial\nReference" as spr dbconn -* query query - cursor cursor -* value spr o-* Shape value <|--- Shape value <|-- "Type 1" value <|-- "Type 2" Shape <|-- point Shape <|-- linear Shape <|-- area </uml> # Geometry ## Introducing Geometry ### Shape validation #### ArcSDE shape verification rules The points of an area shape are stored counterclockwise although the ArcSDE software can return points in either direction. If you generate an area shape whose coordiantes are clockwise, the ArcSDE software changed the rotation to ensure that the coordinate list follows a counterclockwise direction. ## Operations of Geometry Objects ### Spatial relations #### Predicates The pattern matrix contains the acceptable values for each of the intersection matrix cells. The possible pattern values are * T : An intersection must exist; dim = 0, 1, or 2. * F : An intersection must not exist; dim = -1 * * : It does not matter if an intersection exists or not; dim = -1, 0, 1, or 2. * 0 : An intersection must exist and its maximum dimension must be 0; dim = 0. * 1 : An intersection must exist and its maximum dimension must be 0; dim = 1. * 2 : An intersection must exist and its maximum dimension must be 0; dim = 2. #### Equal | | ^ b ||| | | ^ Interia ^ Boundary ^ Exterior ^ ^ a ^ Interia | T | * | F | | ::: ^ Boundary | * | * | F | | ::: ^ Exterior | F | F | * | ### Representations of Geometry #### Well-known representations of geometry ^ Geometry Representation ^ Specification maintained by: ^ Encoding ^ Supports 2D ^ Supports Elevations ^ | Well-Known Text(WKT) | ISO/OGC | ASCII | Yes | Yes((Additional tags have been added by ESRI to support Elevations and Measures)) | | Well-Known Binary(WKB) | ISO/OGC | Binary | Yes | No | | Shape File | ESRI | Binary | Yes | Yes | | ArcSDE Binary | ESRI | Binary | Yes | Yes | #### The well-known text representation for geometry open/arcsde-8.3-developer-help.txt 마지막으로 수정됨: 2020/06/02 09:25저자 127.0.0.1