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Entries from November 2007

A Word About DTMs and TINS

November 26th, 2007 · No Comments

Seems I have gotten ahead of myself, I have started posting about things like DTMs and TINs and I have not attempted to explain what they are. For starters, a DTM is a Digital Terrain Model and a TIN is a Triangulated Irregular Network. For the most part, I often use the terms interchangeably but [...]

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Tags: Modeling

Why Things Like Alignments and Typical Sections Matter

November 25th, 2007 · 2 Comments

Occasionally I encounter a set of grading plans with nothing but contour lines as a guide to building a site. Seldom, if ever, does contour lines provide sufficient data to properly establish an accurate DTM from which to work. Allow me a chance to illustrate:

Looks simple and straightforward does it not, put a little more [...]

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Tags: Modeling

Introduction to Machine Control

November 24th, 2007 · 1 Comment

An area in which I place a great deal of thought these days is in machine control systems. Particularly those systems that are used as grade control for earth moving equipment, such as for dozers, excavators and road graders. This systems function using
1. Some type of positioning systems (usually GPS or Robotics)
2. Device interface (with [...]

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Tags: Machine Control

Least Squares Intro

November 22nd, 2007 · No Comments

There are many ways to approach modeling data and the one I am going to present here I was taught at ETSU in a class called, at the time, Advanced Surveying Mathematics. It is rooted in the realm of Linear Algebra and Calculus and attempts to model data with constraint equations and the minimizing of [...]

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Tags: Least Squares