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.

ArcGIS AE/AO中esriFeatureType与esriGeometryType详解