NTS numbers are used to index National Topographic System maps.  93G/15 is an example. The first part of the number, “93G,” references the 1:250 000 map  sheet. The “/15″ references a specific 1:50 000 map sheet within the coverage of the 93G 1:250 000 map.

Use one of the following methods to find the NTS number that you need:

Online Tool

  • TOPORAMA — Zoom in to the desired area of the map, and click on Download Maps and Data

Use Index Maps

These are located in the first drawer of the Canada topographic map collection in the map cabinets.