Water Utility Benchmarks in Dallas City

1
Water Utility Benchmarksin Dallas City

• Mohammed Alfarhan
• Final project
• GEOS 5482, Spring 2001
• Instructors
• Dr. Carlos Aiken Dr. John Ferguson

2
Introduction

• The city of Dallas and water utility bench marks

3

• How did they locate their benchmarks

Nail as benchmark
Drawn square as benchmark
4
The Objective

• Take the position and the elevation water
  utilities benchmarks.
• Make comparison between the elevation that the
  city of Dallas got and the elevation that I got.

5
The Plan

• First
• Looking for the point

Mapsco map
6
Leica GPS

• Second
• GPS selection

7
Number of satellites
PDOP

• Third
• Time select

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The day of the work

• First time
• on Sunday April 22nd
• Windy
• Second time
• on Wednesday 25th
• Start the work

9
The difficulties

• First
• Finding the points

Nail trace
drawn square
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Taking data beneath the tree

• Second
• The trees
• Third
• The dark

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Data process

• Selecting the core station

Arlington core station
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• Data correction

Base station data before correction
Base station data after correction
13
The results

• Elevation data comparison

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• Water utilities benchmarks
• before and After correction

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• Some water utilities benchmarks

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• 5R benchmark

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• 5K benchmark

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• Thank You