Flat Earth NOT - how to properly measure Earth curvature over land or water - Geodetic Survey
Dear Readers,
Answering the question, "what is the best way to measure Earth curvature over land and water?"
From professional surveyor Jesse Kozlowski...
Well to answer your question right up front, just use 2 carrier phase multi-frequency GPS receivers to measure the dxdydz vector. That's how we have been surveying since the 1990s.
The results you get using high precision GPS will closely match the older pre-GPS methods such as triangulation and electronic distance measuring techniques combined with measuring the vertical angles with high precision theodolites.
For a list and the links to look at the way surveying has been practiced for many many decades resulting in the mapping and charting of everything we see all around us, check this vid I made ... Surveying Standards and Specifications For Guiding Mapping And Construction Video Link - https://youtu.be/MBWnTiTkPos
Published on Oct. 28, 2018 Description: See the pinned comment for the full list of Standards, Specifications and Best Practices Guidelines Related to Surveying Measurements For Mapping And Construction
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From professional surveyor Jesse Kozlowski...
Also, check my video using GPS and theodolite measurements across a lake ... Flat Earth Proof? - Perfectly Flat Level Lake Published on November 18, 2016 Video Description: The smooth calm water of Cooper River Lake was used as a level reference to set 2 spikes at the same elevation. These two level points create an inter-visible line of sight 7,311 feet long across the level water surface. This experiment makes apparently obvious the distinctions between the terms FLAT, LEVEL and HORIZONTAL for anyone with eyes to see and ears to hear. See for yourself.
Video = Perfectly Flat Level Lake - Flat Earth Proof?
https://youtu.be/ZlP3njwf6h0
Perfectly Flat Level Lake - Flat Earth Proof? -
The smooth calm water of Cooper River Lake was used as a level reference to set 2 spikes at the same elevation. These two level points create an inter-visible line of sight 7,311 feet long across the level water surface. This experiment makes apparently obvious the distinctions between the terms FLAT, LEVEL and HORIZONTAL for anyone with eyes to see and ears to hear. See for yourself.
Jesse's Observations and Measurements, data log posting with pictures
https://jessekozlowski.wordpress.com/2016/11/05/looks-perfectly-flat-and-level-to-me/
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Video = Flat Level Lake Measurements - Flat Earth Proof?
https://www.youtube.com/watch?v=y-SEsJLTodc&t=100s
Flat Earth Proof? - Flat Level Lake Measurements
Jesse's Observations and Measurements, data log posting with pictures
https://jessekozlowski.wordpress.com/2016/10/27/flat-level-lake-measurments/
On a calm day, Union Lake served as a level reference to set stakes at the same elevation on opposite sides creating an intervisible line of sight over the water surface. Repeated sets of near real-time reciprocal vertical angle measurements were made between the stakes. The results are presented here.
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Other videos on Jesse Kozlowski's YouTube channel that explain in detail, GPS, Theodolites, GNSS, and more surveying information.
Global Positioning System GPS Fundamentals A Video Lecture
https://www.youtube.com/watch?v=B2yolBN1CCM
GPS / GNSS RINEX Navigation File - Keplerian Orbital Elements Explained
https://www.youtube.com/watch?v=xSlNYKALf44
GPS Explained In An Eastern European Accent
https://www.youtube.com/watch?v=ygdAqxxH98I
GPS ANTENNAS MOUNTED ON BUILDINGS - PROOF
https://www.youtube.com/watch?v=PwR_4WRB5Mw
Chapter 5: Land Surveying and GPS
https://www.e-education.psu.edu/natureofgeoinfo/c5.html
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Bob Measures the Curve, by Bob the Science Guy
https://www.youtube.com/watch?v=aPZ096frjAI
In 2500 feet, the earth curves approximately 1.5 to 2 inches. Can this be measures with inexpensive, but purpose designed tools? Join Bob as he measures the curve of the earth in his backyard.
Details on Bosch GOL 24 Professional https://picclick.com/Bosch-GOL24-Auto...
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References - Standards, Specifications and Best Practices Guidelines Related to Surveying Measurements For Mapping And Construction.
NGS Publications: Alphabetical Listing
https://www.ngs.noaa.gov/PUBS_LIB/pub_alpha_list.shtml
Coast and Geodetic Survey Special Publications
https://library.noaa.gov/Collections/Digital-Collections/USCGS-Special-Pubs
USC&GS Special Publication No 225 Manual of Reconnaissance for Triangulation
https://www.ngs.noaa.gov/PUBS_LIB/ManualOfReconnaissanceForTriangulation_NOS_Special_Pub_225.pdf
USC&GS Special Publication No 247 Manual Of Geodetic Triangulation
http://maps.gis.co.brown.wi.us/web_documents/LIO/PDF/LION/GeographicFrameworks.pdf
A History of Determination of the Figure of the Earth from Arc Measurements by Butterfield 1906
https://archive.org/details/ahistorydetermi00buttgoog/page/n4
HORIZONTAL CONTROL
https://www.ngs.noaa.gov/PUBS_LIB/TRNOS88NGS19.pdf
FGCC Standards and Specifications for Geodetic Control Networks
https://www.ngs.noaa.gov/FGCS/tech_pub/1984-stds-specs-geodetic-control-networks.htm
EM_1110-1-1005 Control & Topographic Surveying
https://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_1110-1-1005.pdf?ver=2014-04-01-094204-880
EM_1110-2-1009 Structural Deformation Surveying
https://www.publications.usace.army.mil/Portals/76/Publications/EngineerManuals/EM_1110-2-1009.pdf?ver=2013-09-04-161052-493
PROPAGATION OF REFRACTION ERRORS IN TRIGONOMETRIC HEIGHT TRAVERSING AND GEODETIC LEVELING
http://www2.unb.ca/gge/Pubs/TR132.pdf
Standards and Specifications for Geodetic Control Networks
https://www.ngs.noaa.gov/FGCS/tech_pub/1984-stds-specs-geodetic-control-networks.htm#3.2
SURVEYOR'S GUIDEBOOK ON RELATIVE ACCURACY
http://file.dnr.wa.gov/publications/eng_plso_relative_accuracy_guidebook.pdf
GEOSPATIAL POSITIONING ACCURACY STANDARDS, PART 2: STANDARDS FOR GEODETIC NETWORKS
https://www.fgdc.gov/standards/projects/FGDC-standards-projects/accuracy/part2/
Standards catalogue - ISO/TC 172/SC 6 - Geodetic and surveying instruments
https://www.iso.org/committee/53732/x/catalogue/
ASPRS Positional Accuracy Standards for Digital Geospatial Data
https://www.asprs.org/news/press-releases/press-release-archives/new-asprs-positional-accuracy-standards-for-digital-geospatial-data-released.html
NOAA Manual NOS NGS 5 State Plane Coordinate System of 1983 James E. Stem
https://www.ngs.noaa.gov/library/pdfs/NOAA_Manual_NOS_NGS_0005.pdf
NOAA Special Publication NOS NGS 13 The State Plane Coordinate System History, Policy,and Future Directions
https://geodesy.noaa.gov/library/pdfs/NOAA_SP_NOS_NGS_0013_v01_2018-03-06.pdf
THE STORY OF NEW JERSEY'S CIVIL BOUNDARIES 1606- 1968, JOHN P SNYDER
https://www.state.nj.us/dep/njgs/enviroed/oldpubs/bulletin67.pdf
Map projections: A working manual Professional Paper 1395 By: John P. Snyder
https://pubs.usgs.gov/pp/1395/report.pdf
Walter Bislin - Eight Inches per Miles squared Formula Derivation
http://walter.bislins.ch/bloge/index.asp?page=Eight+Inches+per+Miles+squared+Formula+Derivation
AZIMUTHS IN CONTROL SURVEYS
http://www.terrasurv.com/azimuths.pdf
Astronomical Observations for Azimuth By: Charles D. Ghilani, Ph.D.
http://www.personal.psu.edu/cdg3/Astro%20Azimuth%20Handbook.pdf
INTRODUCTION TO GEODETIC ASTRONOMY
http://www2.unb.ca/gge/Pubs/LN49.pdf
Solar Observations Using Total Stations - Phenomenal Results
http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.139.9654&rep=rep1&type=pdf
GSN SunShot Procedures Using Internet Solar Position Calculator
https://www.osop.com.pa/wp-content/uploads/2014/02/GSN-SunShot-Using-Internet-Based-Sun-Calculator.pdf
Walter Bislin - Refraction page Flat-Earth: Finding the curvature of the Earth
http://walter.bislins.ch/bloge/index.asp?page=Flat-Earth%3A+Finding+the+curvature+of+the+Earth&q=Refraction#H_Refraction
THE ACCURACY OF THE DETERMINATION OF TERRESTRIAL REFRACTION FROM RECIPROCAL ZENITH ANGLES K. Ramsayer
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0074180900066018
Monitoring of the refraction coefficient in the lower atmosphere using a controlled set-up of simultaneous reciprocal vertical angle measurements
http://ddfe.curtin.edu.au/models/ERTM2160/pdf/Hirt2010_JGR_D21102_refraction_av.pdf
PROPAGATION OF REFRACTION ERRORS IN TRIGONOMETRIC HEIGHT TRAVERSING AND GEODETIC LEVELLING
http://www2.unb.ca/gge/Pubs/TR132.pdf
NOAA Technical Report NOS 92 NGS 22 Results of Leveling Refraction Tests National Geodetic Survey
https://www.ngs.noaa.gov/PUBS_LIB/ResultsOfLevelingRefractionTests_by_NGS_TR_NOS92_NGS22.pdf
PRACTICAL FIELD ACCURACY LIMITS FOR A WILD T-2 THEODOLITE 1966
https://apps.dtic.mil/dtic/tr/fulltext/u2/642295.pdf
Wild T2 Universal Theodolite
http://www.wild-heerbrugg.com/shop/index.php?cPath=1_3_5_25_23&MODsid=a2d6db6787d69eb4494d082cc226e121
TM-5-6675-306-14 WILD T2
http://www.liberatedmanuals.com/TM-5-6675-306-14.pdf
Geodetic Control Diagrams
https://beta.ngs.noaa.gov/gcd/
NGS Historical Geodetic Control Diagrams - Zhanna's SurveyStation
https://thesurveystation.com/NGS/
BLM Manual of Surveying Instructions 2009
https://www.blm.gov/sites/blm.gov/files/Manual_Of_Surveying_Instructions_2009.pdf
BLM Glossery
http://www.dot.ca.gov/hq/row/landsurveys/Study_material/BLM_References/BLMglossery.pdf
BLM Public Land Surveying A Casebook
http://www.dot.ca.gov/hq/row/landsurveys/Study_material/BLM_References/BLM_Case_Book.pdf
BLM Restoration Of Lost Or Obliterated Corners And Subdivision Sections
https://www.blm.gov/or/gis/geoscience/files/lost_oblit.pdf
Solar Compass
https://chestofbooks.com/reference/American-Cyclopaedia-11/Solar-Compass.html
Why Rural Roads Sometimes Have Mysterious Detours
https://www.travelandleisure.com/articles/gerco-de-ruijter-grid-corrections-highways-driving-wichita
This Mountains of Central Asia Digital Dataset (MCADD)
http://pahar.in/
http://pahar.in/books/
http://pahar.in/category/maps/
National Geodetic Survey Data Explorer
https://www.ngs.noaa.gov/NGSDataExplorer/
Map Projections A Working Manual By JOHN P. SNYDER
https://pubs.usgs.gov/pp/1395/report.pdf
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Published on – February 10, 2019
Discussion at - https://www.youtube.com/channel/UC7ipUKERU0tzYFxALJBli4A/discussion
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kind regards, JonahTheScientist