The header is bounded by the records "BEGIN HEADER:" and "END HEADER:" and should contain a record to identify the units system used in the imported data set. The units system can be "US CUSTOMARY" or "METRIC". A summary of record that may be used in the Header section are provided in Table B-1.

Table B-1. Header options for the spatial data file.

Keyword

Value Type

Value

UNITS:

String

US CUSTOMARY or METRIC

DTM TYPE:

String

Type of terrain model (TIN or GRID)

DTM:

String

Name of terrain model

STREAM LAYER:

String

Name of Stream Centerline layer used in the CADD or GIS.

NUMBER OF REACHES:

Integer

Number of hydraulic reaches in the SDF file.

CROSS-SECTION LAYER:

String

Name of the Cross-Sectional Cut Lines layer used in the CADD or GIS.

NUMBER OF CROSS-SECTIONS:

Integer

Number of cross sections in the SDF file.

MAP PROJECTION:

String

Projection (coordinate) system used (e.g. Stateplane)

PROJECTION ZONE:

String

Projection zone (if applicable, e.g. 5101)

DATUM:

String

Reference datum for planar coordinates.

VERTICAL DATUM:

String

Reference datum for vertical coordinates.

BEGIN SPATIAL EXTENT:

None

None. Begin of Spatial Extents object.

Xmin:

Float

Minimum easting of geospatial data.

Ymin:

Float

Minimum northing of geospatial data.

Xmax:

Float

Maximum easting of geospatial data.

Ymax:

Float

Maximum northing of geospatial data.

END SPATIAL EXTENT:

None

None. End of Spatial Extents object.

NUMBER OF PROFILES:

Integer

Number of profile exported from HEC-RAS. RAS GIS Export File only.

PROFILE NAMES:

String array

Water surface profile names exported from HEC-RAS. RAS GIS Export File only.