Surveyors, engineers and architects are never required to factor the supposed curvature of the Earth into their projects, providing another proof the world is a plane, not a planet. Canals and railways, for example, are always cut and laid horizontally, often over hundreds of miles, without any allowance for curvature.
The Suez Canal, for example, which connects the Mediterranean Sea with the Gulf of Suez on the Red Sea is a clear proof of the Earth’s and water’s non-convexity. The canal is 100 miles long and without any locks so the water within is an uninterrupted continuation of the Mediterranean Sea to the Red Sea. When it was constructed, the Earth’s supposed curvature was not taken into account, it was dug along a horizontal datum line 26 feet below sea-level, passing through several lakes from one sea to the other, with the datum line and the water’s surface running perfectly parallel over the 100 miles.
The average level of the Mediterranean is 6 inches above the Red Sea, while the floodtides in the Red Sea rise 4 feet above the highest and drop 3 feet below the lowest in the Mediterranean, making the half-tide level of the Red Sea, the surface of the Mediterranean Sea, and the 100 miles of water in the canal, all a clear continuation of the same horizontal line! Were they instead the supposed curved line of globe-Earthers, the water in the center of the canal would be 1666 feet (502 x 8 inches = 1666 feet 8 inches) above the respective Seas on either side!