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Contents
Users Guide and Tutorial
Introduction
Modelling requirements for irregular grids
Computer-based methods of constructing irregular grids
Overview of TRIGRID
TRIGRID flowcharts
Organization of user manual
Proprietary software requirements
Hardware requirements
Computer
Monitor
Mouse
Printers And Plotters
TRIGRID contributors
Acknowledgements
References
Preparation of depth grid - Demonstration Case
Introduction
Representation of depth data
Flowchart Summary of Depth Grid Preparation
Preparation and sampling of depth data - Demonstration Case
Digitised coastline, contour and sounding data
Organisation of input files for SAMPLER program
Running the SAMPLER to obtain nodes for a depth grid
Further notes on the SAMPLER program
Triangulation over selected set of depth grid nodes
Further notes on triangulation program GRIDIT
Checking the depth grid using the EDITOR program
Experimenting with the EDITOR
Preparation of model grid - Demonstration Case
Introduction
Flowchart Summary of Model Grid Preparation
Preparing nodes for model grid - Demonstration Case
Obtaining boundary nodes for the model grid
Depth information needed for creation of model grid nodes
Creation of model interior nodes - formation of clusters
Extent of Depth and Model Grids - Need for trimming
Triangulation of model grid nodes - Demonstration Case
Checking and smoothing the model grid with the editor
Placement of open boundaries - Trimming the model grid
Program Descriptions
DISPLOT - Display and plotting program
EDITOR - Interactive editing program
GRIDIT - Triangulation Program
NODER - Interactive Node Editing Program
OKNODE and OKNEIGH - File Check Programs
PREJOIN - Grid preparation for joining
REDEP - Interpolate Depth
SHIFTDIG - Shift DIGIT file coordinates
SAMPLER - Interactive Sampling Program
SPLITTER - Interactive Split Program
TRISTATS - Compute Grid Statistics
File Descriptions
File Formats
Introduction
NODE (.nod)
NEIGHBOUR (NEIGH) (.ngh)
TRIANGLE (.tri)
POLYGON (.ply)
EXTCRI
COLOUR (.col)
DIGIT (.dig)
Tutorial and description of demodata directory
Demodata
Original data files
Derived files
Colour tables for triangle tests
Other files
Channel Consulting Ltd.