esriFeatureType通常用来表示数据的存储结构，即物理层；
esriGeometryType通常用来表示数据的几何形状，即表现层。
esriGeometryType枚举类型详解
| 常量 | 值 | 对象 |
| esriGeometryNull |
0 | 未知类型（Unknown） |
| esriGeometryPoint | 1 | 点（Point） |
| esriGeometryMultipoint | 2 | 多点（Multipoint） |
| esriGeometryLine | 13 | 线段（Line） |
| esriGeometryCircularArc | 14 | 圆弧（CircularArc） |
| esriGeometryEllipticArc | 16 | 椭圆弧（EllipticArc） |
| esriGeometryBezier3Curve | 15 | 贝兹曲线（BezierCurve） |
| esriGeometryPath | 6 | 路径（Path） |
| esriGeometryPolyline | 3 | 多段线（Polyline） |
| esriGeometryRing | 11 | 环（Ring） |
| esriGeometryPolygon | 4 | 多边形（Polygon） |
| esriGeometryEnvelope | 5 | 外包（Envelope） |
| esriGeometryAny | 7 | 任何类型（Any valid geometry） |
| esriGeometryBag | 17 | 任意几何类型的集合（GeometryBag） |
| esriGeometryMultiPatch | 9 | 表面几何（MultiPatch） |
| esriGeometryTriangleStrip | 18 | 三角带（TriangleStrip） |
| esriGeometryTriangleFan | 19 | 三角扇形（TriangleFan） |
| esriGeometryRay | 20 | 射线（Ray） |
| esriGeometrySphere | 21 | 球体（Sphere） |
| esriGeometryTriangles | 22 | 三角形（Triangles） |
| esriFeatureType枚举类型详解 | |||
| 常量 | 值 | 描述 | 对象 |
| 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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