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How to read topographic maps
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this post was submitted on 25 Nov 2023
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If it were a local depression instead of a hill, the lines would be hatch-marked on the side pointing into to depression.
Do you have an example, I either never have seen this or never had a depression on a map
You want an example of local depression just swing by my place anytime
heyoooo!
Here's a slide describing how depressions are represented, and here is a topographical map of a sinkhole showing the hashes.
That said, I had to look pretty hard for a map with those marks. Numbers are much more common.
Ah, awesome. i appreciate you taking the time to put this together. I dont recall these on maps, but as you said numbers are common. And i typically use the topomap with shading, so shading helps with understanding the terrain
Page 2 under contours: https://pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf
Awesome, thankyou
A Wisconsin DNR pdf explaining how to identify local depressions on a topo map
They are an oddity for sure. But sometimes there’s a local divot that would be interpreted as a small mound without the hatch marks.
That’s interesting, ordinance survey (in the UK) don’t do that, so it isn’t a universal standard
In the UK, you have to notice that the heights are reducing