Guess the method.
A grid of altimetric points is created (looks like a network of squares) by this method.
surface levelling
It shows the information about the elevation of height points and is placed e.g. onto a side of buildings, usually at their bottom part. (2 words)
a survey mark
The surveying staff usually includes a surveyor, a notetaker and one or two diggers.
not diggers - one or two assistants
SEA L _ _ _ _
LEVEL
The names of two simple instruments which were stretched between two points to count the number of links or markings. One was made of metal - CH _ _ _ _ and the second one of fabric - T _ _ _.
chain and tape
We measure horizontal angles and distances by this method.
polar method
The levelling instrument together with two pieces of levelling staff. (2 words)
a levelling unit
A levelling instrument might be: vertical, electronic or laser.
not vertical - optical
HORIZONTAL P _ _ _ _
HORIZONTAL PLANE
This device is more precise and shows the magnetic north direction, but can have some errors, especially magnetic declination.
a compass
The levelling instrument is set in the middle between two points.
geometric levelling from the centre
Measured data are recorded in it. (2 words)
a field book
We recognize these levelling methods: geometric levelling from the centre, land levelling and trigonometric levelling.
not land - surface levelling
VERTICAL A _ _ _
VERTICAL AXIS
This device is a long pole with markings that indicate the height - it is still used today.
a rod
We measure distances and perpendicular lines by this method.
orthogonal method
It is used especially for the orthogonal method, stationing is measured on it. (2 words)
the initial direction
The main parts of a levelling instrument are: a tripod, a spirit level, a telescope, a crosshair and a levelling screw.
not a tripod - a tribrach
T _ _ _ _ _ _ SPIRIT LEVEL
TUBULAR SPIRIT LEVEL
Global Positioning System (GPS) is a modern, accurate and fast method but depends on the availability and quality of S _ _ _ _ _ _ _ _ S _ _ _ _ _ _ .
satellite signals
We measure both planimetry and altimetry, we determine the location and elevation of the point.
tacheometry
The perimeter of objects is measured by it. (only one word)
bracings
Self-reading levelling staff might be: solid, covering or telescopic.
not covering - folding
R _ _ _ _ _ _ _ _ _ _ COORDINATES
RECTANGULAR COORDINATES
Global Positioning System (GPS) is used to measure D.....s, D.....s, A.....s and E.....s between points.
distances, directions, angles and elevations