111000@reddthat.com to Cool Guides@lemmy.caEnglish · 1 year agoHow to read topographic mapsreddthat.comimagemessage-square55fedilinkarrow-up1427arrow-down133
arrow-up1394arrow-down1imageHow to read topographic mapsreddthat.com111000@reddthat.com to Cool Guides@lemmy.caEnglish · 1 year agomessage-square55fedilink
minus-squaremeyotch@slrpnk.netlinkfedilinkEnglisharrow-up38·1 year agoIf it were a local depression instead of a hill, the lines would be hatch-marked on the side pointing into to depression.
minus-squareBCsven@lemmy.calinkfedilinkEnglisharrow-up20·1 year agoDo you have an example, I either never have seen this or never had a depression on a map
minus-squaredoctorskull@lemmy.worldlinkfedilinkEnglisharrow-up32·1 year agoYou want an example of local depression just swing by my place anytime
minus-squareIlliterate Domine@infosec.publinkfedilinkEnglisharrow-up19·1 year agoHere’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.
minus-squareBCsven@lemmy.calinkfedilinkEnglisharrow-up6·1 year agoAh, 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
minus-squareJessica@discuss.tchncs.delinkfedilinkEnglisharrow-up3·1 year agoPage 2 under contours: https://pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf
minus-squaremeyotch@slrpnk.netlinkfedilinkEnglisharrow-up1·1 year agoA 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.
minus-squaresixCats@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up2·1 year agoThat’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
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