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Alert: High Density Library Closure | November 24 - 26

Air Photo Search Guide

This is a guide to finding air photos in the Spatial and Numeric Data Services collection.

Find NTS Map Sheet

Step 1: Air photo sets are organized according to the National Topographic System (NTS) map grid.  Use Toporama to identify the 1:250,000 and 1:50,000 scale numbers. Enter location, use  tool to find NTS grid.

  • 82 J is a 1:250,000 scale map sheet number
  • 82 J 16 is 1:50,000 scale map sheet number  

Note the 1:250,000 and 1:50,000 map grid numbers.