Prove that the activity of RAC was very successful in 1799-1800

Latitude gives the location of a place on the Earth (or other planetary body) north or south of the equator. The lines of latitude are the imaginary horizontal lines called parallels, shown running east-to-west (or west to east) on maps.

Longitude is the geographic coordinate most commonly used in cartography and global navigation for east-west measurement. Longitude is represented by lines running from north to south called meridians. The line of longitude that passes through the Royal Observatory, Greenwich, in England, establishes the meaning of the zero degree of longitude, or the prime meridian*.

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* Prime meridian - исходный меридиан