1 Triangulated Irregular Network Node Edge Face. 2 3D Structure of a TIN.

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Presentation transcript:

1 Triangulated Irregular Network Node Edge Face

2 3D Structure of a TIN

Real TIN in 3D!

TIN with Surface Features Classroom Waller Creek UT Football Stadium

A Portion of the TIN

Input Data for this Portion Mass Points Soft Breaklines Hard Breaklines

TIN Vertices and Triangles

TIN Surface Model Waller Creek Street and Bridge

3-D Scene

3-D Scene with Buildings

11 TIN as a source of cross-sections

12 CrossSections

13 Channel and Cross-Section Direction of Flow Cross-Section Channel

14 HEC GeoRAS A set of ArcGIS tools for processing of geospatial data for – Export of geometry HEC-RAS – Import of HEC-RAS output for display in GIS Available from HEC at An old tutorial on using GeoRAS for Waller Creek with ArcView 3.x is available at: eoras.html eoras.html

15 Hydraulic Modeling with Geo-RAS GIS data HEC-RAS Geometry HEC-RAS Flood Profiles Flood display in GIS

Hydraulic Modeling with HEC-RAS RAS stream geometry. Cross-section extracted from the TIN.

Hydraulic Modeling with HEC-RAS Resulting water elevations.

Floodplain Mapping Floodplain for 500 cfs.

Floodplain Mapping 2-D floodplain animation (500 – 5,000 cfs).

Floodplain Mapping 3-D floodplain animation.