5 Cool Things You Didn’t Know About Topo Maps Feb 7, 2017 ‹ Previous Post Top 7 Maps That Ultimately Explain Map Projections Next Post › ArcGIS Pro: Be Careful When Using Custom Project Templates Related Posts Inspiring stories from GIS Day 2019 NYS ITS Geospatial Services Web Service URLs Changing! Updated NYS Hydrography Web Service Here are five things you may not have known about topo maps (though you’ve likely suspected #5). Article.