Guess the word
I am the professional who carries out measurements of land for construction. Who am I?
land surveyor
The chainman reads the measurement through the theodolite. (Incorrect - who actually does this?)
The surveyor (not the chainman) reads the measurement.
A __________ survey is used when the area is small and the Earth’s curvature can be ignored.
plane
Tenir en compte
to take something into account
Name one device that has replaced the optical theodolite.
total station
This is the curved shape of the Earth that must be considered in large-scale surveys. What is it?
curvature
A plane survey is used for large areas that require curvature correction. (What's wrong?)
A geodetic survey (not plane) is for large areas with curvature.
Contour __________ show the relief or elevation of land on a map.
lines
concevoir
to design
What kind of lines connect points of equal elevation on a map?
contour lines
I am a red-and-white measuring stick held vertically during a survey. What am I?
rod
Cross hairs are used to draw contour lines. (What’s incorrect?)
Cross hairs are for aiming—not for drawing contour lines.
A __________ is used to measure horizontal and vertical angles.
theodolite
to bore
forer
What is commonly used as a vertical reference point for determining elevations in land surveying?
Mean sea level
This tool sends a laser to a target to measure distance. What is it?
laser rangefinder
Bench marks are used to measure the depth of bedrock. (What’s the error?)
Bench marks are used for height reference, not for bedrock depth.
The __________ of the map determines how detailed the elevation lines are.
scale
to plot a point
tracer un point
What instrument is used to detect underground rock density?
gravimeter
I’m the point used as a reference for calculating elevations. What am I?
bench mark
Seismographs are used to detect magnetic fields. (Correct this!)
Magnetometers detect magnetic fields, not seismographs.
__________ photography involves taking images from directly above the site.
aerial
soustraire
to subtract
What is the main difference between a map and a chart in surveying context?
A map shows land features; a chart often shows navigational/sea information.