8/3/2019 Lect 1_CDS Introduction

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Masayu Hj. Norman Computer Application II 

Department of Surveying Science And Geomatics

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OBJECTIVES

INTRODUCTION

BASIC SURVEY DATA ENTRY

COORDINATES CALCULATIONS

PROCESSING SURVEY DATAEXPORTING

PLOTTING SURVEY DATA

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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Students able to implement CDS and AutoCAD software

Generate survey plan using both software

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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A suite of civil design and survey software for Cogo (CoordinateGeOmetry), contouring, subdivision and roadway design.

There are several tools can be used for the CDS implementation:

i. Open Jobii. Zoomiii. Paniv. Modes –Displayv. Modes Inputvi. Layersvii. Queryviii. Joinsix. Multiple Windows

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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i) OPEN JOB

This option is used to open the existing files by single or multiplewindows. The format of file using by CDS is .db (db.job).

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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ii) Zoom

Function: control the size of the job, or more correctly, how much of your current jobis displayed on the screen at any given time.

Two methods of zoom functions i.e. i) using icon given as below and ii) press the “Z” key on the keyboard.

For Zoom Extent, user be able to press “E” key to show all the images displayed.

To enlarge the image, zoom in with the “+” icons while to reduce the size, click “-” 

icons. 

ZOOM

OUT

ZOOM

IN

ZOOM

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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Cont… 

To drag the images at your right side, press the mouse and hold. Then,drag to the right side as given below:

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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iv) Modes Display

Modes function represents a screen display controlling how the job willappear. Display is controlled by Modes and Layers.

MODES

Modes appeared after pressing the icons or “F9” on the keyboard.

MODES

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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Cont… 

Modes function also can be defined by pressing the key on the keyboard as

given below:

F1 : HelpF2 : Point NumbersF3 : StringsF4 : String Names

F5 : HeightsF6 : CodesF7: ContoursF8: Triangle ModelF9: Modes ScreenF10:Layers Screen

Modes can only displayed one attribute data at a time, the layers areneeded for showing all attribute selected.

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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v) Modes Input 

Makes it easy to convert old title plans to newer units, or to simply merge

together surveys done in different units.

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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DegreesEntered as DDD.MMSS where D is the degrees, M is the minutes andS is the seconds. So, 125degrees 15minutes 35seconds would be

entered as 125.1535

GradsHere the circle is divided into 400 units instead of 360 with degreesentered as GGG.ggg

Mills Used mainly by the military - a circle is divided into 6400 units.

Quadrants

 A system where the base reference is a quarter of a circle, rather thanthe whole circle. Entered as QDD.MMSS: where Q is the Quadrant - 1is North East (NE), 2 is South East (SE), 3 is South West (SW), 4 isNorth West (NW). Note that the degrees field must be between zeroand 90, and any values less than 10 must have a leading zero.So, North 5 degrees 25 minutes 35 seconds East would be entered as

N5.2535E and South 55 degrees 38 minutes 44 seconds West wouldbe entered as S55.3844E.

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics

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Metres Standard decimal metres entered as MMM.mmm

Feet (decimal

feet)Feet and hundredths of a foot Entered as FFF.ff where 1 foot = 0.3048metres exactly

Feet & Inches

Entered as FFF'IIN/D where F is the feet, I is the inches , and N& D arethe fractions of an inch where N is the Numerator and D is theDenominator, or for those who didn't study math, N is the bit on thetop and D is the bit on the bottom. So, twenty seven feet six and fiveeighth inches would be entered as 27'065/8

Linksan original 'decimal' system, though now outdated where there were100 links to a chain. Entered as LLL.ll, and one link is 0.201168 metres

US Survey Feet 

Provides a perfect example of why politicians should not be taken tooseriously, particularly in matters technical. Ignoring the fact that feetwere a British invention and had since the 13th Century beenestablished as the quirky Anglo competitor to the decimal Metre of theFrench where 3.2808399 feet made up one metre, the US Congress in1836 decided that they needed a thing to be known as a US SurveyFoot which would need 3.2808333 feet to make a metre.

Spanish vara not common but still out there - entered in decimal format VVV.vvv.

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vi) Layers

Layers can be assessed by pressing the “F10” or icons as below: 

Choose the attribute by scroll down the pull down menu and select suitabledata should be displayed on the screen 

PULL DOWN

MENU

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vii) Query

Shows by the question mark symbol or by pressing the “?” key.

Used to change and question the particular points.

The “Next” and “Previous” buttons useful to scan the forward and backward throughthe database.

If user wants to change the attribute data, pressing the “ok” button and will be asked

to verify that wish to save and it will change permanently.

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viii) Joins (bearing and distance between two points)

Shows by the J symbol or by pressing the “J” key on the keyboard.

Dialogue Box appears and as seen in the screen and the box is requesting a Firstand Second Points.

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xi) Multiple Windows

To display more than one view of a particular job.

Select the “Window” menu from the menu list. Then, choose “New Window” option.

Horizontal Vertical

Masayu Hj. Norman Computer Application II Department of Surveying Science And Geomatics