DTM Surfaces tutorial

Introduction

Overview

Requirements

Workflow

Surface modelling concepts

Naming conventions

Breaklines and spot heights

Graphical vs file-based options

Setting up for this tutorial

Task: Set the work directory

Creating a DTM

Task: Create a DTM - graphics-based method

Task: Create a DTM - file-based method

Task: Create a DTM from spot height data

Task: Create a DTM using breaklines and spot heights

Task: Create a DTM on the plane of best-fit

Viewing DTMs

Task: Colour a DTM by elevation

Task: Perform graphical animation

Task: Save images of a graphical animation

Transforming DTMs

Task: Transform a DTM to a different coordinate system

Calculating DTM volumes

Task: Create a boundary string using the file-based method

Task: Create a boundary string using the file-based method

Task: Create a boundary string using the graphics-based method

Task: Calculate cut and fill volumes

Task: Calculate cut and fill volumes

Task: Calculate net volume between DTMs

Clipping a DTM

Task: Clip a DTM - file-based method

Task: Clip a DTM - graphics-based method

Sectioning a DTM

Task: Create a DTM section axis line

Task: Create DTM sections

Contour files with annotations

Task: Create DTM contours – file-based

Task: Create DTM contours – graphics-based

Task: Create index contour file with annotations

Draping a string over a DTM

Task: Drape a spot height string over a DTM

Task: Drape a non-spot height string over a DTM

Draping image

Task: Drape an image over a DTM

Creating DTM intersections

Task: Create an upper triangles surface of two DTMs

Task: Create a lower triangles surface of two DTMs

Task: Create solid by intersecting two DTMs