Outputs and Naming

This reference describes the GIS products written by the current toolbox. The source HEC-RAS files are opened for reading and are not modified.

Individual-tool geodatabases

The 1D geometry, 2D geometry, and 2D results tools default to Create New Geodatabase = True. For a plan HDF named Model.p01.hdf, the default organization is:

Model.p01.gdb
└── Model_Plan01
    ├── CrossSections
    ├── MeshPerimeters
    ├── MaxWSE
    └── ...

The existing named geodatabase is reused if it already exists. Use a new output name when you need to preserve an earlier extraction unchanged.

If geodatabase output is disabled, individual output parameters default to ArcGIS Pro's in-memory workspace. In-memory layers are temporary and should not be treated as a deliverable.

Batch-tool naming

Organize HEC-RAS Project prefixes feature-class names with project and plan identifiers, for example Model_Plan_01_MeshCellCenters. This makes layers from multiple plans distinguishable in one geodatabase and supports plan group layers in the map.

Plan parsing expects a base name ending in .pNN. Other names fall back to plan 00; use standard HEC-RAS names when predictable plan identification matters.

1D fields

Feature class	Geometry	Fields written by the tool
CrossSections	Polyline	xs_id, River, Reach, RS, LeftBank, RightBank, LenLeft, LenChannel, LenRight, StationElevation, ManningsN
RiverCenterlines	Polyline	river_id, RiverName, ReachName, USType, DSType
BankLines	Polyline	bank_id, BankSide, Length
EdgeLines	Polyline	edge_id, EdgeType, Length
Structures1D	Polyline	struct_id, Type, River, Reach, RS, Description

ArcGIS adds standard fields such as OBJECTID, Shape, and geometry measurements as applicable.

2D fields

Feature class	Geometry	Fields written by the tool
Breaklines2D	Polyline	bl_id, Name, CellSpaceNear, CellSpaceFar, NearRepeats, ProtectRadius
BCLines2D	Polyline	bc_id, Name, Type
MeshPerimeters	Polygon	mesh_name
MeshCellCenters	Point	mesh_name, cell_id
MeshCellFaces	Polyline	mesh_name, face_id
MeshCellPolygons	Polygon	mesh_name, cell_id
PipeConduits	Polyline	Dynamic fields from available HDF conduit attributes
PipeNodes	Point	Dynamic fields from available HDF node attributes
PipeNetworks	Polygon	Dynamic fields from available HDF network attributes

Dynamic pipe field names are normalized for ArcGIS. Spaces and punctuation may become underscores, and names that conflict with ArcGIS fields may be renamed.

Results fields

Feature class	Geometry	Fields written by the tool
MaxWSE	Point	mesh_name, cell_id, max_wse, max_wse_time
MaxVelocity	Point	mesh_name, face_id, max_vel, time_of_max

Result dates are calculated from the HDF simulation start time plus the stored time-of-maximum offset. Result values remain in source-model units.

Coordinate systems

The toolbox assigns the CRS detected from the HEC-RAS project context. If none can be found, the user must provide Override CRS. The override supplies a spatial reference; it is not a coordinate transformation. Confirm alignment before analysis.

Missing data

HEC-RAS HDF content varies by model type, version, and compute state. The toolbox writes an output only when the required HDF group and datasets exist. A selected but unavailable element can produce a message and no feature class or an empty feature class; review geoprocessing messages and counts.