Surveyor Transit

How to judge the distance by estimation?

Does anyone know how to estimate distance when u looking at something far far away?

eg. a boat in the ocean, using ur hand as a ratio and estimating the size of the boat and calculate the distance.????
does this work?

any other good ways?

Comparing size with your hand to determine distance as you suggest requires that you know the height of the object.

Radioshack sells a device to measure distances at the golf course. It assumes that the flag is a standard height so it compares its apparent height to a scale calibrated in yards.

Without knowing such a height for comparison you range measurement will only be as good as your estimate of the object size.

Our eyes measure distance by the angles our eyes make when looking at an object. THis is why your eyes cross when looking at the tip of your nose. Each eye is taking a seperate image from a different horizontal position (the space between your eyes) and the muscles are angling each eyeball so as to provide a smooth image (no overlap) This is how we can tell if something is close or far away.

This concept was used in Artillery of WW1 and prior to electronic ranging. A special set of binoculars with the lenes several feet apart were used to measure range. A set of prisims and mirrors would be adjusted so that the overlapping images would focus on the object of interest (a tank etc) when the images aligned it was easy to compute the range using trigometery as a base distance between left and right lenses was known and measured angles determined. In combat a calibrated scale was provided on the adjustment knob so very quick range measurments could be determined.

A device such as this would be useful on a moving platform such as a ship as it is a quick measurement. If you use a surveyor transit you can determine ranges and elevations of fixed objects quickly by using similar technique by moving the transit a known horizontal distance and measuring angles to a fixed object.

Find Surveyor Transit On eBay Below:

LIETZ SOKKISHA C3A AUTOMATIC LEVEL TRANSIT SURVEYOR SCOPE
LIETZ SOKKISHA C3A AUTOMATIC LEVEL TRANSIT SURVEYOR SCOPE
$79.99
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
$199.00
Antique Vintage Craftsman CL Berger Survey Surveyors Transit Scope
Antique Vintage Craftsman CL Berger Survey Surveyors Transit Scope
$100.00
Dietzgen Surveyors18 inch Transit Level 63110
Dietzgen Surveyors18 inch Transit Level 63110
$249.99
Vintage David White Transit Surveyor Model 8114 with case
Vintage David White Transit Surveyor Model 8114 with case
$35.00
made in Ukraine modern optic surveyor transit level N 3KL BOX h 3kl
made in Ukraine modern optic surveyor transit level N 3KL BOX h 3kl
$35.00
K  E PARAGON SURVEYING TRANSIT KEUFFEL  ESSER COMPASS SURVEYORS THEODOLITE
K E PARAGON SURVEYING TRANSIT KEUFFEL ESSER COMPASS SURVEYORS THEODOLITE
$300.00
Vintage LIETZ Model No200 Survey Surveyors Transit  Case
Vintage LIETZ Model No200 Survey Surveyors Transit Case
$49.99
David White Transit 8114 Surveyors Level Case Theodolite Construction Realistic
David White Transit 8114 Surveyors Level Case Theodolite Construction Realistic
$24.00
SOKKISHA DOUBLE CENTER LIETZ THEODOLITE TM20C TRANSIT LEVEL SURVEYOR SURVEY
SOKKISHA DOUBLE CENTER LIETZ THEODOLITE TM20C TRANSIT LEVEL SURVEYOR SURVEY
$250.00
Vintage surveyor transit level Charvoz Carsen Corp 12 in original wood box
Vintage surveyor transit level Charvoz Carsen Corp 12 in original wood box
$40.00
Vintage Craftsman surveyor transit level in original wood box builders level
Vintage Craftsman surveyor transit level in original wood box builders level
$40.00
David White 8114 Surveyors Transit Level w Case Theodolite Construction Tool
David White 8114 Surveyors Transit Level w Case Theodolite Construction Tool
$5.00
DAVID WHITE SURVEYORS TRANSIT MODEL 8300 W CASE
DAVID WHITE SURVEYORS TRANSIT MODEL 8300 W CASE
$180.00
Brass Theodolite15 Surveyors Transit AlidadeConstruction Surveying Instrument
Brass Theodolite15 Surveyors Transit AlidadeConstruction Surveying Instrument
$249.99
VINTAGE Vesco Transit Wood Surveyors Grade Stick Gradechecker Survey Very Rare
VINTAGE Vesco Transit Wood Surveyors Grade Stick Gradechecker Survey Very Rare
$50.00
SOKKIA MODEL 7401 SURVEYING TRANSITCOMPASS SURVEYORSTHEODOLITEK
SOKKIA MODEL 7401 SURVEYING TRANSITCOMPASS SURVEYORSTHEODOLITEK
$449.00
++ THS SURVEYORS TRANSIT NO 262 31726
++ THS SURVEYORS TRANSIT NO 262 31726
$500.00
Berger Instruments Surveyors Transit Model 300LP
Berger Instruments Surveyors Transit Model 300LP
$99.99
Pentax GT 4B Surveyor Glass Circle Transit Theodolite w Case
Pentax GT 4B Surveyor Glass Circle Transit Theodolite w Case
$119.99
Keuffel  Esser K  E Vintage Wood Surveyor Transit Grade Pole Extendable Stick
Keuffel Esser K E Vintage Wood Surveyor Transit Grade Pole Extendable Stick
$29.53
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
$140.00
Antique Fennel Kassel Surveyors Transit No 132668 with wooden box
Antique Fennel Kassel Surveyors Transit No 132668 with wooden box
$149.95
1900 VINTAGE ANTIQUE TRANSIT SURVEY SURVEYOR COMPASS LEVEL W  EL GURLEY STADIA
1900 VINTAGE ANTIQUE TRANSIT SURVEY SURVEYOR COMPASS LEVEL W EL GURLEY STADIA
$600.00
15 inchs Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
15 inchs Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
$270.00
Vintage 15 Large Brass Optical Surveyors THEODOLITE Transit Surveying Alidad
Vintage 15 Large Brass Optical Surveyors THEODOLITE Transit Surveying Alidad
$199.00
Vintage 15 Large Brass Optical Surveyors THEODOLITE Transit Surveying Alidad
Vintage 15 Large Brass Optical Surveyors THEODOLITE Transit Surveying Alidad
$199.00
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
$199.00
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
15 Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instrument
$359.99
Pentax GT 6B Glass Circle Surveyors Transit Theodolite w Case
Pentax GT 6B Glass Circle Surveyors Transit Theodolite w Case
$395.00
Vintage 15 Large Brass Optical Surveyors THEODOLITE Transit Surveying Alidade
Vintage 15 Large Brass Optical Surveyors THEODOLITE Transit Surveying Alidade
$290.00
Antique Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instruments
Antique Brass Theodolite Transit Surveyors Alidade Vintage Surveying Instruments
$285.00


Recently Purchased Surveyor Transit:


antique brass theodolite transit surveyors surveying instrument scope compass, pentax gt4b surveyor glass circle transittheodolite w case , berger instruments surveyors transit model 300lp, david white surveyors level transit model 8114 1950s with box , k amp; e paragon surveying transit keuffel amp; esser compass surveyors theodolite, vintage brunson model 50 engineers transit mcclellan afb surveyors level rare, vintage lietz model no200 survey surveyors transit amp; case, david white 8114 surveyors transit level wcase theodolite construction tool, vintage craftsman surveyor transit level in original wood box builders level, vintage surveyor transit level charvoz carsen corp 12 in original wood box , antique 19041910 buff amp; buff mfg boston surveyors level transit serial 7224, david white transit 8114 surveyors level case theodolite construction realistic, vintage david white transit surveyor model 8114 with case, antique vintage craftsman cl berger survey surveyors transit scope, lietz sokkisha c3a automatic level transit surveyor scope, antique david white 1946 surveyors transit with box, rare vintage swiss made kern aarau surveyor transit level pre 1950, vintage brass surveyors telescope transit scope with level amp; case, kern aarau gk0 surveyor transit level surveying theodolite portable vintage see, vintage w amp; le gurley transit surveyor 49639 w wood box brass plumb bob, 15 inch vernier transit theodolite for surveying construction surveyor instr, 15 inch brass theodolitetransit surveyors alidade vintage surveying instruments, vernier transit theodolite for surveying construction surveyor instrument, antique brass theodolitetransit surveyors alidade vintage surveying instruments, vintage 15 large brass optical surveyors theodolite transit surveying alidade, pentax gt6b glass circle surveyors transit theodolite w case, 15 inchs brass theodolite transit surveyors alidade vintage surveying instrument, 15 brass theodolitetransit surveyors alidade vintage surveying instrument, keuffel amp; esser k amp; e vintage wood surveyor transit grade pole extendable stick, ths surveyors transit no 26231726, david white surveyors transit model 8300 w case, vintage surveyors engineers transit ths model 7100 japan circa 1950 with case , sokkia model 7401 surveying transitcompass surveyorstheodolitek, vintage wood surveyors survey transit pole extendable stick dietzgen 6500 13, vintage 15 large brass optical surveyors theodolite transit surveying alidad, wild heerbrugg model t1a surveyors transit and tripod, antique fennel kassel surveyors transit no 132668 with wooden box, 1900 vintage antique transit survey surveyor compass level w amp; el gurley stadia, brass theodolite15 surveyors transit alidadeconstruction surveying instrument, dietzgen surveyors18 inch transit level 63110, vernier transit theodolite for surveying construction surveyor instrument , made in ukraine modern optic surveyor transit level n3kl box h3kl, sokkisha double center lietz theodolite tm20c transit level surveyor survey, vintage vesco transit wood surveyors grade stick gradechecker survey very rare, vintage surveyor transit level buff amp; buff co boston 30978 wye level unique 1930, dietzgen surveyors transit level 65403



Comments are closed.