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Make a Great Map of Your Engineering Building Traverse
©Mar. 2008 Dr. B. C. Paul
Note – This presentation contains screen shots from the Mine Sight and Excel Programs, both of which are created by software companies.
What Are We Going To Do
• Now that You Have Surveyed Around the Building
• Exchange notes with other teams– Each team only needs to go part way around the
building – together you have a traverse all around the building
• An Excel Spreadsheet called Traverse Assistant was prepared for this class. You will put your survey data into it and get output suitable for use in –
• MineSight – a 3D graphics program that will create a visual map of your traverse
Take a Look at Traverse Assistant
Traverse assistantHas you followSeveral steps inPutting in your data
You will enter yourData into yellowFields
Answers orCalculation areasAre in green or red.(Don’t mess withThe formulas in theseFields)
Start by Putting in the Location of Your Instrument Station
Put in the coordinatesAnd elevation of yourFirst point(the example has theState Plane CoordinatesOf your first point byThe grate near theCorner of Lincoln andDouglas)
{Yes that mean youWill start by enteringThese very sameCoordinates}
Next Enter Your Height of Instrument
If you used a tapeMeasure in tenths ofFeet you have yourInstrument in decimalFeet – enter it here
In this example IAssumed I hadMeasured my heightOf instrument with aRegular tape in feetInches and fractions ofAn inch
I enter the feetI enter the inches
I enter the fractionOf an inch – in thisCase 3/16 – whichThe spreadsheet converted to decimals
Note that I can only enter my distance in one typeOf unit at a time – if I choose decimal feet it is not feet and inches.
Your height of instrument is uniqueTo your survey work.
Finally I Enter My Backsight Azimuth
I happen to have myBacksight azimuth inDecimal degrees.(For backsighting thePower plant smoke-Stack the azimuth is59.229 degrees)
Note I could have hadThat azimuth in Grads,Mills, or degreesMinutes and seconds.
{This backsight azimuth will be the starting backsightAzimuth for everyone on this project}
I Scroll Down to Start Entering Information About My Foresight
I First Enter the Angle to the Right That I Turned from my Backsight
In this case IAssumed I hadMeasured thatAngle in Degrees, MinutesAnd SecondsBut it could haveBeen in Grads orMills.
Note that theSpreadsheetConverts any ofThe measures toDecimal degrees.
Next You Will Enter the Vertical Angle to Your Foresight
DifferentInstrumentsMeasure verticalAngle differently.
Some measureThe angle fromThe horizontal –This is especiallyTrue of oldTransits
Many newerInstruments useA zenith angleMeasured downFrom vertical
Note that this spreadsheetWill take either a zenith orAn angle from the horizonAnd will take it in grads,Degrees Minutes SecondsOr Mills.
You May Have Measured Your Distance to the Foresight by Stadia
or EDM
If you measured byStadia just enter theUpper, middle, andLower rod readings(all our rods are inDecimal feet)
If You Measured by EDM Skip Step #6 and move to #7
Enter your EDMDistance whichWill already beIn decimal feet
Then enter theHeight of yourReflector – noteYou can enterIn decimal feet ofFeet inches andFractions ofInches dependingOn what kind ofTape you used.
Note that if you have entered something for Stadia you should not also claim to haveDone the shot by EDM
Scroll Down Again to Start Reading Your Answers
We are going to runMinesight by starting atA known point and thenMoving in a specifiedDirection at a givenDirection.
Thus we read the outputFor distance and directionIn this example it is395.73 feet at an azimuthOf 284.179 degrees.
Time to Fire Up Minesight!
Pick the Location You Will Have Your Project Files in
If it’s a new project location (most likely is) it will ask about creating a resource
folder
Say Yes.
Minesight Opens and It Asks for the Coordinate Range for Your Project
Lets Work on a Guess
59.229 degrees
N
The Buidling is down inHere to the South and West
North 381,288East 2,570,639
Our survey stations won’tGo much further northAnd most will be to the south(ie – smaller northing)
One of our stations isOver by the Arena a littleFurther east but mostPoints are to the west(ie – smaller easting)
More Guessing
The building is probably lessThan 1000 feet in eachdirection
So our smallest northing is about 380,400 with a max of about 381,400Our smallest easting is about 2,569,800 with a max of about 2,570,800
Set For Feet and Input My Coordinate Range
Click Ok toMove on
I’m So Excited – Its Getting Ready to Go
I’m Going to Set Up a File to Keep My Drawing in
Start byClicking onUn-named toHighlight it.
I’m Going to Create a New Geometry Object
It Wants Me to Give the Object a Name
I likeEngineeringBuilding onSurface(I could pickAnything)
When I’m doneClick Ok
Click on My New File to Highlight It
I’m getting theFile ready forMe to putStuff in it.
Left Click On My Object to Pop Up A Menu
Pick Edit
Note We Get An Open Pretty Yellow Box Ready for Our Stuff!
Turn on the Point Editor
Tell it You Will Create a Polyline
Enter the Coordinates of Your First Point and Click Apply
You see theFirst prettyDot appear
Next Enter the Distance and Direction to Your First Foresight
I used theDistance andDirection fromTheSpreadsheet
I can then clickPreview orApply
And Bully! My First Line Appears
I’m nowReady to goBack to theSpreadsheetFor my nextpoint
I have two possibilities
• One possibility is that the foresight I just put in was a sideshot to a building corner– I might have taken several more side shots
• Another possibility is that I was foresighting the next point I would move my instrument to.
If I Am Doing Sideshots from One Point
Obviously I won’tBe changing myInstrumentLocationBacksightAzimuth orHeight ofInstrument
I Will Change My Angle Right, My Vertical Angle and My Rod (or EDM) Readings
If I Am Moving My Instrument to the Foresight Point
Here are theNew coordinatesOf theNew instrumentStation
And here is theNew backsightAzimuth
(Copy themDown to use)