13. The system as claimed in claim 11 wherein the control circuit is configured to: determine a user history based on the navigation route including the passive-navigation portion, a general-navigation portion, or a combination thereof for limiting the guidance communication for one or more locations of the navigation route previously utilized the system user; calculate a guidance weight based on the passive-navigation portion, the general-navigation portion, or a combination thereof according to the user history; and generate the user geographic-knowledge model based on the guidance weight.
11. A navigation system comprising: a control circuit configured to: receive user input regarding a navigation route for controlling guidance communication along the navigation route for a system user wherein the user input corresponds to a passive-navigation portion for representing one or more locations of the navigation route not requiring communication of the guidance communication for the system user; generate a user geographic-knowledge model based on the user input regarding the navigation route; calculate a system route based on the user geographic-knowledge model; communicate the system route for guiding the system user in traversing the system route; and a storage circuit, coupled to the control circuit, configured to store the user geographic-knowledge model.