Hi.
Now this building has six corners to it and at every corner, there are two ten foot offsets.
Let's take a look at my computer screen, and see what I'm talking about.
Right here is the building that I'm referring to.
Points and circles here are our control network.
We're just gonna have two control points.
One on one and one on two.
This L shape right here are the corners of our building.
Points five, seven, eleven, twelve, fourteen and eight are the physical corners of the
building.
All the offsets with exception to point number two and point number seventeen are ten feet
away from the point that they're referencing.
So one and four are referencing five.
And they're ten feet away.
Six and nine are ten feet away and referencing seven.
Because L is an inside corner, its offsets are gonna be variable.
Now this is a project where we're going to assume a coordinate system.
Your control points may already have coordinates that you're going to be using.
However, we're just gonna go ahead and assume that the northing of point number 101 is five
thousand and that the easting is ten thousand.
Now, looking at these plans, all we have to do is very simple addition.
We're gonna go ahead and calculate the coordinates of these points and then we're going to input
them into our data collector so that we can begin surveying.
One thing that this map is missing is that there's no north arrow, so I'm go ahead and
make the assumption that north is up.
All right, with that assumption made, we see that we're going north 55 feet but we're not
going east or west anywhere.
So our easting is going to stay the same.
And our northing is gonna go up 55 feet.
So the new northing becomes 5055 and the easting is at ten thousand.
All right we're gonna go ahead and take a look at our points.
We're gonna jump around a little bit but based off of what we're working with, the easiest
way to calculate these coordinates is to go by columns or rows and just work your way
across.
When I look at number three, I can see that again, it's on the same line.
So I'm just gonna say that the easting is also ten thousand.
The building dimension is 35.
There's ten feet to the north and ten feet to the south to get us to 55 between the control
points.
Therefore, the distance between 101 and three is ten feet.
So our northing is going to be 5010.
Now let's take a look at two.
It looks like the dimension between three and two is eleven feet.
So all we're gonna have to do is add eleven feet to the northing of three.
So that puts us at 5021.
Easting is the same.
So we can just keep that at ten thousand.
All right, the distance between two and one is 24 feet so we're just gonna go ahead and
add 24 to the northing of two.
So that gives us 5045.
And the easting is still ten thousand because it's in the same column.
Great.
We got the first column.
Now let's go ahead and calculate the next column.
So when I shift over here, we look at point number 16.
Sixteen is along the same northing line.
We're not going up in any way.
So the northing will be five thousand.
So let's go ahead and write five thousand and this is also shifting at ten feet, so
we can now add the easting at 10,010.
The next point we're gonna look at is point number eight.
It looks like we're going to go up and this is the same easting because we're not going
left to right from sixteen, but we're just going up ten feet so point number eight is
gonna be 5010 and the easting will just be 10,010.
We go all the way up to point number five.
Between eight and five is 35 feet.
So we're going to add 35 feet to the northing of eight so that puts us at 5045.
And that makes sense, because we're in line here with one and it has the same northing
as one.
Easting stays the same as eight, 10,010.
Finally, point number four.
We're ten feet north of point number five so we're just gonna add ten feet.
So that's 5055.
And the easting is the same at 10,010.
All right?
Let's do the third column.
So for point number seventeen, we're along the line of sixteen and 101 so we're gonna
have the same northing of 5000.
So we can write 5000 here.
Now we are moving east 19.67 feet from point number sixteen, so I'm gonna take the easting
of sixteen and add 19.67.
So we're at 10029.67.
So because of the shift in the north of 19.67, that's going to be the easting of point number
seventeen.
Let's go up to number eleven.
Eleven is gonna have the same easting because it's not going left or right of seventeen.
So we can write the easting down 10029.67.
And it looks like we're going north ten feet and then another eleven feet, so we're gonna
be going north 21 and the northing from point number eleven, so that's going to be 5021.
The next point is number seven.
We're gonna add 24 feet to the northing.
So the northing will be 5045.
The easting stays the same -- 10029.67 and point number six, we're gonna add another
ten feet so it's gonna be 5055.
Easting is the same.
We'll come over here to point number 18.
Eighteen, the northing is gonna be 5000 because it's in line with the other points that are
5000.
We're moving over 10.33 so that means that our easting is going to be 10040.
The next point is point fourteen.
We're just literally going north ten feet.
So it's going to be 5010.
Easting stays the same as 18 -- 10040.
Next, we're gonna go north eleven feet to get to point number twelve.
So the northing is going to be 5021.
And the easting stays the same at 10040.
Next we're going to point number ten so you're gonna just add another ten feet and we have
5031, 10040.
The last column -- point number fifteen is already ten feet off of our initial 5000 line
so that means the northing is going to be 5010.
And we're going over ten feet from point number eighteen so the easting will be 10050.
Next point is point number thirteen and it's literally just north eleven feet, so point
number thirteen's coordinates will be 5021 and the easting is the same at 50050.
It looks like we missed number nine.
I think that's just cause it's in its own little line but that's okay.
We can look at point number seven's coordinates and it seems like it's not going up or down
at all so the northing is going to be the same as point number seven, 5045 and we're
moving to the right ten feet because it's an offset so we'll just add ten to the easting
of seven -- 10039.67.
And there you have it.
That is the calculations to figure out the coordinates of all the points for our L-shaped
building.
Now, depending on the type of brand that you use for your total station, and your data
collection, it's gonna depend on how you can export this data.
You could just manually input all this data into a text document.
And differentiate the point numbers, northing, easting, by using a comma, or if you tab over
and use a space.
You could also do this on Excel.
It might be a little bit easier because you have full control of putting in the numbers
yourself.
Once you have gotten your project named, you want to either save this as a text file or
as a .csv file.
Those are the two most common file extensions that most data collectors will understand.
After you have saved it, upload it to your data collector.
Usually you can do this through USB or through the computer.
And once all that's been done, we're gonna go ahead and pack-up all our stuff and head
out to the field.
Hello, and welcome to the field.
We're gonna go ahead and establish our control points so that we can begin our stake out.
Now for point 101, we're gonna be using our infamous blue point.
I have gone ahead and labeled it 101 just so that we know where we are located.
For the purposes of this lab, we're only gonna be using a tape to establish the second point.
Usually in the industry you may set the point first, take an observation and establish a
distance and using that very accurate distance, establish the coordinates of the second point.
But for educational purposes, I'm just gonna go ahead and pull 55 feet and establish point
102.
I'm then getting as close as I can to the point.
I'm gonna go ahead and drive the chaining pin into the ground so that it's aligned with
our point.
Now I'm gonna go ahead and pull this tape 55 feet.
[Tape makes slinky noises as it's pulled] And as we near into here, we can see we're
at 55 feet.
Stretch this out and pull tight on the tape.
I'm gonna pound in this hub.
[Pounding noises] Fifty-five feet.
[Tape makes slinky noises] So I'm gonna put a stake right here.
[Pounding noises] [♫Music♫]
That's number 102.
Now what we're gonna start out by doing is occupying this first point, 101.
If you haven't seen my video on how to set up a total station, I'm gonna recommend that
you click on the video in the top right hand corner.
It highlights the details of what goes on in a survey total station setup.
Watch that video first before you continue with this one.
Then once you have seen that video, come back to this video to see the rest of the stake
out procedure.
I'm gonna go ahead and set up a prism rod here on our point 102.
So that we can backsight to it from our total station and then we can just go ahead and
position this to point towards the total station.
Now, I'm gonna go ahead and sight the prism so that we can get our backsight reading.
Good.
Over to the right.
Up a little bit.
[♫Music♫] [Device beeps]
[♫Music♫] Okay.
I did not expect that.
Wow.
Okay.
So this number usually has some error in it.
Uh, I hit 55 right on.
So I expect about 5/100ths of a foot of error when you use the tape, maybe between 5/100ths
of a foot and a tenth of error.
Or, if you're like me, you'll get it right on.
Remember you're measuring the horizontal distance and not the slope distance.
So, okay.
So 55 feet between point 101 and point 102.
Now just like the traversing video, we're gonna be establishing our point of occupancy
and what point that we're backsighting.
All right so we'll go ahead and start by going into survey and then we're gonna go into stake
points.
Now, we are occupying point 101.
The instrument height is irrelevant since we're not doing any kind of elevation, so
you can just put zero.
The point that we're backsighting is 102.
And once again instrument height -- irrelevant.
So you can just put zero.
Backsight.
And we'll check and go ahead and set our angle and it's gonna set our horizontal angle and
we can check and continue.
Now we're gonna go ahead and start staking out points.
I'm gonna go ahead and start with point number one.
Now, it's good industry practice that if you have a fixed rod with a prism on it at all
times on a point, and you're going to be staking points, that you put this rod down.
That way your robotic total station isn't going to accidentally sight to this prism
and throw off your staking.
If you're using the traditional total station, and you don't have robotics, this isn't really
an issue so you don't have to worry about it.
Okay we're gonna go ahead and lock our instrument to our total station.
If you don't have robotic total station, you're gonna have somebody behind your instrument
sighting your rod at every shot.
I like to raise this above my head so that I don't block it.
But we'll go ahead and search.
Okay.
We're locked in on our total station.
I have prepared a number of stakes that we're going to use to stake out our point building.
Remember, this is how our building looks like with all of its offsets.
So these stakes will be representing the location of that building and the offsets.
All right, to figure out if we're close to the point where it needs to be staked, we're
gonna go ahead and take a reading and see what our total station tells us the distance
is from our current location.
I'm gonna take a reading.
Make sure we're nice and plumb.
Okay so in relation to our total station, point number one is located six feet away
from the total station, which is what out stands for.
And 2.28 feet to the right of the total station.
So you would have to also move right 2.28 feet.
So what I'm gonna do is I'm gonna pace back about six feet.
My pace is a little over two feet per pace.
So I'm gonna do three paces -- one, two, three -- and then I'm gonna pace to the right two
feet.
That's about one pace, which is two feet.
I'm gonna take another reading.
All right, and here is what we've got.
Now we need to go out of the instrument 0.5 feet and go to the right 0.3 feet.
Very minimal movement.
I'm gonna go out .5 and go to the right of the instrument .3.
Let's go ahead and try that.
All right and after doing all that, now it says go in 1/100th of a foot and I'm right
on between right and left, so I'm gonna go ahead and stick this rod into the ground.
Place a stake in this location.
[♫Music♫] [Pounding noises]
All right.
That'll do.
All right so I'm gonna go ahead and ask to stake out point number two.
All right and then it says I need to move in about 23 feet, so let's go ahead and do
that.
All right in about five more feet and to the left of the instrument, one and a half feet.
Okay you go out.
Okay.
Let's try that.
Right of the instrument .4 feet.
Out .16 to the left .04.
All right there we go.
Lift it out of place, put it in here, pull out our hammer.
[Pounds] Go ahead and switch to point number three.
All right, it says I need to move in about eleven feet.
Okay, out two feet and right one foot.
Go out two feet and right of the instrument one foot.
Try right here.
Okay out .7 and left .6 so out .7, right .6.
Out half.
Right .3.
All right.
Right here.
[♫Music♫] Got our hammer.
[Pounds] All right.
Let's do point number four.
[♫Music♫] [Device makes a clicking noise]
[♫Music♫] [Sound effects]
[♫Music♫] All right.
And there you have it.
guys next time.
[♫Music♫]