Question: How often are USGS topographic maps updated? How often are USGS topographic maps updated? Once every 10 years. Once every 5 years. Once every 3
How often are USGS topographic maps updated? How often are USGS topographic maps updated? Once every 10 years. Once every 5 years. Once every 3 years. Every year. There is no fixed schedule, they are updated only when the area mapped experiences significant changes
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