Look for the date of the map first. The date of the survey and compilation is most important. A conspicuous date of revision generally means that the entire map was not redrawn-only spot revisions were made. Step 2 . Note whether the publisher is military, government, or civilian.
Maps published by the government or the military are generally most accurate.
Step 3 . Look at the composition. To a great extent, this will reveal the map's accuracy. Step 4 . Observe the map's color.