A more thorough explanation:

Definition: A nomographer is a person who is skilled in nomography, which is the art or science of constructing charts or diagrams that represent mathematical relationships or laws.

For example, a nomographer might create a chart that shows the relationship between temperature, pressure, and volume in a gas. This chart could be used to predict how changes in one variable will affect the others, based on the laws of thermodynamics.

Another example of nomography is the use of slide rules, which are a type of nomogram that allow for quick calculations of mathematical functions. A skilled nomographer could use a slide rule to perform complex calculations without the need for a calculator or computer.

In summary, a nomographer is someone who is skilled in creating charts and diagrams that represent mathematical relationships or laws. This skill can be applied in a variety of fields, from science and engineering to finance and economics.