esriFeatureType與esriGeometryType的區別與聯絡
esriFeatureType通常用來表示資料的儲存結構,即物理層;
esriGeometryType通常用來表示資料的幾何形狀,即表現層。
esriGeometryType列舉型別詳解
常量 | 值 | 物件 |
esriGeometryNull | 0 | 未知型別(Unknown) |
esriGeometryPoint | 1 | 點(Point) |
esriGeometryMultipoint | 2 | 多點(Multipoint) |
esriGeometryLine | 13 | 線段(Line) |
esriGeometryCircularArc | 14 | 圓弧(CircularArc) |
esriGeometryEllipticArc | 16 | 橢圓弧(EllipticArc) |
esriGeometryBezier3Curve | 15 | 貝茲曲線(BezierCurve) |
esriGeometryPath | 6 | 路徑(Path) |
esriGeometryPolyline | 3 | 多段線(Polyline) |
esriGeometryRing | 11 | 環(Ring) |
esriGeometryPolygon | 4 | 多邊形(Polygon) |
esriGeometryEnvelope | 5 | 外包(Envelope) |
esriGeometryAny | 7 | 任何型別(Any valid geometry) |
esriGeometryBag | 17 | 任意幾何型別的集合(GeometryBag) |
esriGeometryMultiPatch | 9 | 表面幾何(MultiPatch) |
esriGeometryTriangleStrip | 18 | 三角帶(TriangleStrip) |
esriGeometryTriangleFan | 19 | 三角扇形(TriangleFan) |
esriGeometryRay | 20 | 射線(Ray) |
esriGeometrySphere | 21 | 球體(Sphere) |
esriGeometryTriangles | 22 | 三角形(Triangles) |
esriFeatureType列舉型別詳解 | |||
常量 | 值 | 描述 | 物件 |
esriFTSimple | 1 | Polygons, polylines, and points representing objects or places that have area, such as water bodies; linear objects, such as rivers; and localized positions, such as houses or sample sites. | Simple Feature. |
esriFTSimpleJunction | 7 | Simple junction feature in a geometric network representing point objects, such as a fuse, service point, or telephone pole. | Simple Junction Feature. |
esriFTSimpleEdge | 8 | Simple edge feature in a geometric network representing polyline objects, such as primary or secondary overheads. | Simple Edge Feature. |
esriFTComplexJunction | 9 | Complex junction feature in a geometric network, not in general use. | Complex Junction Feature. |
esriFTComplexEdge | 10 | Complex edge feature in a geometric network representing polyline objects such as primary overheads, which have midspan connectivity.Network resources flow through complex edge without interruption by midspan connectivity. | Complex Edge Feature. |
esriFTAnnotation | 11 | Place or object names or identifiers, such as street names, hydrant ID numbers, land values, or elevation. | Annotation Feature. |
esriFTCoverageAnnotation | 12 | Place or object names or identifiers, such as street names, hydrant ID numbers, land values, or elevation. Not supported in geodatabases, only supported in coverage datasets. | Coverage Annotation Feature. |
esriFTDimension | 13 | Measurements, such as distances, lengths, widths, and depths. | Dimension Feature. |
esriFTRasterCatalogItem | 14 | A raster dataset in a raster catalog that has information, such as footprints, names, metadata, and any other user-defined attributes. | Raster Catalog Item. |
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