Create a free account and view content that fits your specific interests in civil engineering Learn More
object height surveying trigonometry Calculation Example
Calculation example - Calculate the height of an object when its base is inaccessible
Contents [show]
This calculation is an example problem in structural engineering. This content is sponsored by PPI. For exam preparation courses on FE and PE, see the list offered by PPI
Calculate the height of an object from a baseline when its projected position to the ground is inaccessible. Case scenario when baseline AB is level and collinear with object.
Known values: Baseline distance AB length, height h1 of the observer, vertical angles α and β.
Solution: Height of object above ground at position A.
First, measure horizontal distance AB and vertical angles α and β from observer point A1 and B1 respectively.
Then calculate vertical distance OC1:
Thus:
Finally, calculate height of object above ground at station A:
See a complete list of exam preparation courses on FE and PE with similar examples.
Selected Topics
Calculation example - Calculate the Bearing Angle of any Baseline of a Traverse Network (Third Fundamental Surveying Problem)Calculation example - Three Point ResectionGauss's Area Calculation FormulaCalculation example - Determine the water content within a soil sampleCalculation example - Determine the specific gravity of a soil grain GsCalculation example – Central projection and projective transformation of a planeCalculation example – The intersection methodCalculation example – Elevation Calculation along Profile TangentCalculation example – Elevation calculation and grade along a profile vertical curveCalculation example – Similarity Transformation in 2-D spaceCalculation example – Volume Calculation – Ramp Reaching a Vertical WallCalculation example – Indirect length measurement with basic trigonometryCalculation example – Road design– Circular arc implementationCalculation example – Road design– Circular arc implementation 2Calculation example – Re-establishing an accessible Reference StationCalculation example – Re-establishing an inaccessible Reference StationCalculation example – Calculate the height of a buildingCalculation example – Calculate the height of a building - 2Calculation example - Calculate the height of an object when its base is inaccessible #2Calculation example - Calculate the height of an object when its base is inaccessible #3Calculation example - Calculate the height of an object when its base is inaccessible #4Calculation example - Calculate the height of an object when its top and bottom are visible but inaccessibleCalculation example - Calculate the height of an object when its top and bottom are visible but inaccessible #2Calculation example - ResectionsCalculation example - Calculate the height of an object from three angles of elevationCalculation example - Calculate inclined angle of a bendCalculation example - Find the coordinates of the intersection of two linesCalculation example - Find the coordinates of the intersection of two linesCalculation example - Seam true thickness and gradient calculationCalculation example - Find the apparent dip of a plane or seam in any directionCalculation example - Find the rate of full dip of a plane or seam, given its direction and the rate and direction of an apparent dipCalculation example - Find path gradients in different directions, given the rate and direction of full dipCalculation example - Find the bearing of an apparent dip (two symmetrical to full dip directions), given the rate and direction of full dipCalculation Examples
See Also
The history of the Golden Gate Bridge
Nov, 24, 2023The Golden Gate Bridge opened on May 27, 193...
Professional Examinations Preparation
Jun, 08, 2022
Calculation Examples
Jun, 08, 2022
Calculation example - Find the bearing of an apparent dip (two symmetrical to full dip directions), given the rate and direction of full dip
Nov, 30, 2020Given the rate and direction of full dip of a pla...
Calculation example - Find path gradients in different directions, given the rate and direction of full dip
Nov, 20, 2020Given the rate and direction of full dip of a plan...
