scaleFactorAtCentralMeridian

Given a predicate that represents a relationship or action between entities, generate a one-sentence description explaining its meaning.  
# Instructions
Focus on describing the relationship, not the entities themselves. 
# Response Format
Begin the description with \' Indicates...\'

Predicate: scaleFactorAtCentralMeridian

Indicates the ratio by which distances are scaled along the central meridian of a map projection relative to true ground distances.