SPRINGFIELD 150 M
N 37° 15.339 W 093° 10.111
15S E 485056 N 4123246
SPRINGFIELD EDM BM DISC 150 M
Waymark Code: WM13HZ
Location: Missouri, United States
Date Posted: 01/03/2007
Views: 19
Springfield Baseline
EDM Calibration Baseline
Greene County, Missouri
Established by
Springfield Chapter of MARLS
and
Land Survey Program
Missouri Department of Natural
Resources
1983
SPRINGFIELD EDM CALIBRATION BASELINE
The baseline is located in Greene County about 4 miles east of Springfield and about 4 miles west of Strafford. It is on
the north side of the north outer road of I-44.
To reach the baseline from I-44 Exit #84 go north on Highway 744 for 0.4 miles to the intersection of Highway 744
with Farm Road #104, go east along Farm Road #104 for 0.9 miles to the intersection of Farm Road #104 with Gault
Road, go south on Gault Road to the intersection with the north outer road and the 0 meter station for the Springfield
Baseline.
The baseline station elevations are as follows:
0 meter - 30.48m
150 meter - 30.74m
400 meter - 31.66m
1275 meter - 37.10m
Electronic Distance Measuring (EDM) Calibration Baselines
in Missouri
The Missouri Department of Natural Resources has established 12 Electronic
Distance Measuring (EDM) calibration baselines in Missouri. Despite the fact that
modern equipment is highly sophisticated and provides a direct readout of the
distance to the nearest hundredth of a foot or millimeter at push of a button, it
can also give an erroneous reading. The EDM baseline will allow the operator to
verify that the instrument is in calibration and the instrument is being operated
properly.
Each EDM baseline consist of 4 monumented stations. The monuments are spaced
nominally at 0 meters, 150 meters, 400 meters and 1100 to 1375 meters. Each station
will be occupied with the EDM equipment and a measurement made to the 3 other
stations. This will give a total of 12 measurements. The results will determine the
scale factor and a system constant for the EDM instrument.
The EDM operator should use the same procedures as in every day fieldwork.
This will not only confirm that the equipment is in good working order, but will
ensure the complete method of collecting data. The measuring system includes not
only the instrument but the tripods, tribrachs, prisms, thermometers and
barometers/altimeters as well.
WHEN TO CALIBRATE YOUR INSTRUMENT?
Upon receipt of a new instrument
Immediately after each servicing
Anytime the operator feels the instrument is not working properly
Before and after DNR or other government agency contracts
BEFORE RUNNING THE BASELINE PERFORM THE FOLLOWING
Check and adjust optical plummets, bulls-eye bubbles and plumbing poles.
Check thermometers and barometers/altimeters
Make sure all tripods are rigid and stable
Clean prisms
Fully charge all batteries
Have an EDM Calibration Report form for the baseline you are running.
When filling out the EDM Calibration Report form, fill in all lines that apply and
add addition information if needed.
IMPORTANT NOTE
Before each measurement, enter the temperature and station pressure or absolute
pressure into the instrument. The barometric pressure given over the radio and at
airports has been reduced to sea level. DO NOT ENTER SEA LEVEL PRESSURE INTO THE
EDM. One method used to find station pressure or absolute pressure is by elevation.
The barometric pressure is reduced 0.1 inches of mercury for every 90 feet of
elevation. So, to correct the sea level pressure obtained from the radio or
airport, pick an average elevation for your area and divide by 90. Example: if the
elevation is 1000 feet, dividing 1000 by 90 equals 11.11. Therefore, subtract 1.11
inches from the sea level pressure to obtain station pressure or absolute pressure.
MO 780-1863 (12-03)
STATE OF MISSOURI
DEPARTMENT OF NATURAL RESOURCES
GEOLOGICAL SURVEY AND RESOURCE ASSESSMENT DIVISION
EDM CALIBRATION REPORT – SPRINGFIELD EDM BASELINE (HORIZONTAL)
DATE COMPANY REFLECTOR SETUP
Tripod with tribrach Prism pole Bipod pole
INSTRUMENT TYPE AND MODEL
NOTE: ALL DISTANCES SUBMITTED SHALL BE HORIZONTAL.
E.D.M. AT 0m
E.D.M. AT 150m
0m 150m 400m 1275m
H 1 = H 2 = H 3 = TEMP
H 1 = H 2 = H 3 = *PRESS
(150.2173m) (399.9825m) (1275.0162m)
H 3
H 2
H 1
0m 150m 400m 1275m
H 4 = H 5 = H 6 = TEMP
H 4 = H 5 = H 6 = *PRESS
(150.2173m) (249.7651m) (1124.7988m)
H 6
H 5
H 4
E.D.M. AT 400m
0m 150m 400m 1275m
H 7 = H 8 = H 9 = TEMP
H 7 = H 8 = H 9 = *PRESS
(399.9825m) (249.7651m) (875.0337m)
H 7
H 8
H 9
E.D.M. AT 1275m
0m 150m 400m 1275m
H 10 = H 11 = H 12 = TEMP
H 10 = H 11 = H 12 = *PRESS
(1275.0162m) (1124.7988m) (875.0337m)
H 10
H 11
H 12
*Barometric pressure for EDM calibration must be station pressure. Do not use barometric pressure reduced to sea level.
MO 780-1864 (12-03)
STATE OF MISSOURI
DEPARTMENT OF NATURAL RESOURCES
GEOLOGICAL SURVEY AND RESOURCE ASSESSMENT DIVISION
EDM CALIBRATION REPORT – SPRINGFIELD EDM BASELINE (SLOPE)
DATE COMPANY REFLECTOR SETUP
Tripod with tribrach Prism pole Bipod pole
INSTRUMENT TYPE AND MODEL
NOTE: ALL DISTANCES SUBMITTED SHALL BE SLOPE.
E.D.M. AT 0m
E.D.M. AT 150m
0m 150m 400m 1275m
HI = S 1 = S 2 = S 3 = TEMP
H 0 = H 0 = H 0 = *PRESS
S 3
S 2
S 1
0m 150m 400m 1275m
S 4 = HI = S 5 = S 6 = TEMP
H 0 = H 0 = H 0 = *PRESS
S 6
S 5
S 4
E.D.M. AT 400m
0m 150m 400m 1275m
S 7 = S 8 = HI = S 9 = TEMP
H 0 = H 0 = H 0 = *PRESS
S 7
S 8
S 9
E.D.M. AT 1275m
0m 150m 400m 1275m
S 10 = S 11 = S 12 = HI = TEMP
H 0 = H 0 = H 0 = *PRESS
S 10
S 11
S 12
Heights or delta elevations between monuments.
0m = 30.48m 150m = 30.74m 400m = 31.66m 1275m = 37.10m
*Barometric pressure for EDM calibration must be station pressure. Do not use barometric pressure reduced to sea level.
Condition: Mark found in good condition
Designation: 15O M
Benchmark Agency: other (not included below)
Benchmark Agency (if other): MISSOURI LAND SURVEY
Monumentation type: Control Monument, Survey Control, Control Survey
County: GREENE
USGS 7.5' Topographic Quadrangle Name (optional): USGS Bassville (MO) Topo Map
Special category (optional): Not listed
Find type: Found by luck/skill/knowledge
Monumentation type (if other): Not listed
Special Category (if other): Not listed
Web address of this benchmark's datasheet (optional): Not listed
NGS PID: Not listed
Local database's URL (optional): Not listed
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Visit Instructions:
- A closeup photo of the mark taken by you is required.
- A 'distant' photo including the mark in the view is highly recommended. Include the compass direction you faced when you took the picture.