Hydrologic object layers are the geospatial representation of hydrologic objects. Each type of hydrologic object has one corresponding layer as shown in the figure below. These layers have the same name of hydrologic objects and are grouped in the same way as they are grouped in the toolbox. The geometry type (polygon, polyline or point) of each layer is given in Table 7-1.

TABLE 7-1 THE GEOMETRY TYPE OF HYDROLOGIC OBJECT LAYERS

Category Hydrologic object
& Geometry Type
Category Hydrologic object
& Geometry Type
Hydrograph Polygon
Polygon
Polygon
Polygon
Operation Point
Point
Point
Point
Route Polyline
Polyline
Polyline
Polyline
Point
Utility Point
Point
LID Point
Point
Point
Point
LID Point
Point
Point
Point

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