Prepare for the NGA 21 Locating and Marking of Facilities Test with our study material, flashcards, and multiple-choice questions that offer hints and detailed explanations. Get ready to succeed in your certification!

Multiple Choice

Records of the geographic location of piping and other components of a gas distribution system are always provided on scale maps of the system.

Geographic records of where piping and components sit are kept on scale maps because these maps show actual locations across the service area with accurate distances and relationships. A scale map provides a verifiable basemap that crews can use to locate buried assets, plan digs, and coordinate safety and maintenance. Hand-drawn plans may not be current or precise enough, non-geographic diagrams don’t show real-world locations, and aerial photos alone don’t establish the exact, navigable coordinates needed for locating facilities. So, scale maps are the standard reference for these geographic records.

Geographic records of where piping and components sit are kept on scale maps because these maps show actual locations across the service area with accurate distances and relationships. A scale map provides a verifiable basemap that crews can use to locate buried assets, plan digs, and coordinate safety and maintenance. Hand-drawn plans may not be current or precise enough, non-geographic diagrams don’t show real-world locations, and aerial photos alone don’t establish the exact, navigable coordinates needed for locating facilities. So, scale maps are the standard reference for these geographic records.