The object number may be any in the range of 1 to 32000. The object is then always referred to by this object and trisolation number. String - object Segment trisolation Point - triangle When you define an object you explicitly assign it both an object number and a trisolation number. Naming Conventions The objects you create in Surpac are numbered by a system similar to that of string and string segment numbers. It is not possible to model overhanging or vertical surfaces with a DTM surface. That is, a DTM cannot have multiple Z values for a given X, Y coordinate. That is, a DTM file cannot be opened if the original string file of the same name is not accessible. Consequently DTM files are not valid without the original string files. DTMs are made of triangles, with each point of each triangle matched to a point in the original string file. Almost any surface can be modelled as a DTM, including natural topography, lithological contacts, bedrock/overburden contact, or water tables. Surfaces are used in Surpac for such things as 3D visualisation and for calculating volumes. The result is a set of non-overlapping triangles. Triangles are created between points on the strings. Surface Modelling Concepts Strings and DTMs Digital terrain models (DTMs) are created from strings. There are other ways to achieve a result. This workflow demonstrates the steps in this tutorial. To have Surpac v6.1 or later installed on your computer and the data set accompanying this tutorial. If you are a new Surpac user, you should go through the Introduction to Surpac tutorial before going through this topic. Requirements The DTM Surfaces tutorial assumes that you have a basic knowledge of Surpac. This document introduces the theory behind surface modelling processes and provides detailed examples using the surface modelling functions in Surpac. By working through this tutorial you will gain skills in the construction, use of and modification of DTMs. Introduction Overview Surface Modelling uses triangulation to create two-dimensional models known as Digital Terrain Models (DTMs). Task: Create Solid by Intersecting 2 DTMs Task: Create a Lower Triangles Surface of 2 DTMs Task: Create an Upper Triangles Surface of 2 DTMs Task: Drape a Non-Spot Height String Over a DTMĭraping an Image Task: Drape an Image Over a DTM.
Task: Drape a Spot Height String Over a DTM Task: Create Index Contour File with Annotations Draping a String Over a DTM Draping a String Over a DTM
Task: Create DTM Contours – Graphics Based Task: Create a Boundary String Using the Graphics-based Method Task: Create a Boundary String Using the File-based Method Transforming a DTM Task: Transform a DTM to a Different Coordinate System DTM Volume Calculations Task: Save Images of a Graphical Animation Task: Create a DTM Using Breaklines and Spot Heights Task: Perform File-based Creation of a DTM Task: Perform Graphical Creation of a DTM Task: Set the Work Directory (Windows Vista) Task: Set the Work Directory (Windows XP)
#SURPAC DTM CHANGING COLOR SOFTWARE#
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