This website exposes the flat earth deception and proves that the earth is globe shaped.
Geodesy is the science of accurately measuring and understanding three fundamental properties of the Earth: its geometric shape, its orientation in space, and its gravity field— as well as the changes of these properties with time.
How does your airline pilot know which direction to head when he’s over the ocean with no landmarks? How do we know the exact boundaries between parcels of land and between states and countries?
These are questions we answer with geodesy (sometimes known as Geodetics Engineering): the science of how we characterize the shape and size of the earth.
These surveyors have painstakingly taken measurements from point to point, and using geometry and triangulation, have determined the size of continents, and the shape of the earth.
Geodetic surveying reveals that the angles of the measured triangle exceed 180 degrees, proving that the Earth is curved. This is called ‘spherical excess’.
If the Earth was flat, the angles would add up to 180 degrees.
One of the biggest perspective problems is that flat earthers are applying the 8″ per mile squared earth curvature formula to wrong line.
Let’s apply this to a picture to see the difference between the level line and the horizon line.
Flat earthers are looking out to the vanishing Horizon Line which is about 3 miles out, and using that line to apply the formula, which is wrong. Obviously the perspective is exaggerated by the small globe in the image below, but the point is the same.
The curvature formula applies to the Astronomical horizon, which is the line created by looking straight out. In the above image it points out to the sky.
References For Additional Study On Geodetic Study:
Radius of the Earth Radii Used in Geodes http://www.oc.nps.edu/oc2902w/geodesy/radiigeo.pdf
Reference Ellipsoids and Geodetic Datum Transformation Parameters
Geodetic Datum Overview
Geodesy including astronomical observations, gravity measurements, and method of least squares PDF
Determination of the Figure of the Earth from Arc Measurements. Arthur D. Butterfield
As long as there have been maps, cartographers have grappled with the impossibility of portraying the globe earth in two dimensions.
To solve this problem mapmakers have created hundreds of map projections, mathematical methods for drawing the round earth on a flat surface.
Yet of the hundreds of existing projections, and the infinite number that are theoretically possible, none is perfectly accurate.
We Got The Radius Of The Earth! video
You can read about how geodesy proves the globe earth in these free PDF’s