4 Flashcards
(29 cards)
What is the correction needed for the astronomical azimuth determined at the primary control line?
It shall be corrected for convergency of meridian.
What is the observed angle in differential levelling?
The elevation of a turning point is determined by subtracting the F.S. from H.I.
What is the maximum allowable angular error of closure in a survey?
Square root of the number of primary traverse stations multiplied by two point five seconds.
How should the lot number begin when a cadastral survey is made of unsurveyed portions?
The lot number shall begin from the number next to the highest lot number of previous survey.
What is the true azimuth of the line when the mark observed is on the Southeast and on the left side of the sun?
360 - observed horizontal angle + A.
What are valley lines in topography?
They are lines along the bottom of the valleys where two sides of the valley meet.
What is the number of stations between azimuth checks in primary control traverse?
Not to exceed 25 stations.
What is the compass rule in balancing a survey?
It is the assumption that the effects of error in angular measurements are equal to the effects of error in chaining.
What authority is needed for changes or subdivision of a property covered by a previous survey?
Authority from the Regional Technical Director for Lands.
How can the relative strength of a figure be evaluated quantitatively?
In terms of factor R based on the theory of probability; lower the value of R, the figure is stronger.
What are two extreme stations common to two project controls?
They are the main control of the project connected to the main control of adjoining project.
What must be provided to the Chief Cadastral Project?
Titled and copy of plan.
What is the width of a stream that shall be excluded from the boundaries of the property undergoing survey?
Less than 5 meters.
What is a constant systematic error?
Conditions do not change during a series of measurements.
What are summit and other critical points in a topographic survey?
They are points where spot elevations are taken to show elevation changes.
What is the azimuth error of closure in a secondary traverse?
The difference between the carried azimuth and the azimuth of the primary line where the secondary traverse closes.
Who issues survey authority or order in political boundary surveys?
Regional Executive Director.
What is the preferred distance between location monuments established by pair?
About 300 meters.
What is the acceptable difference for side shots in residential surveys?
Shall be within 15 minutes of arc in latitude and 10 minutes of arc in longitude.
What areas shall municipal base maps comprise?
Areas within a spheroidal quadrangle.
How should portions of patented, leased or decreed land during a cadastral project be surveyed?
As a separate lot.
What should be done for isolated surveys of lands adjoining properties claimed by provincial government?
A notification letter shall be sent to the Lands Management Bureau.
Where can the cadastral survey project number for a municipality be secured?
From the Land Management Sector.
What should the topography of the previously approved and new survey conform to in mineral surveys?
At the common boundary.
