@111000@reddthat.com to Cool Guides@lemmy.caEnglish • 7 months agoHow to read topographic mapsreddthat.comimagemessage-square49fedilinkarrow-up1395arrow-down131
arrow-up1364arrow-down1imageHow to read topographic mapsreddthat.com@111000@reddthat.com to Cool Guides@lemmy.caEnglish • 7 months agomessage-square49fedilink
minus-square@meyotch@slrpnk.netlinkfedilinkEnglish37•7 months agoIf it were a local depression instead of a hill, the lines would be hatch-marked on the side pointing into to depression.
minus-square@BCsven@lemmy.calinkfedilinkEnglish19•7 months agoDo you have an example, I either never have seen this or never had a depression on a map
minus-square@misterdoctor@lemmy.worldlinkfedilinkEnglish28•7 months agoYou want an example of local depression just swing by my place anytime
minus-squareIlliterate DominelinkEnglish18•7 months 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-square@BCsven@lemmy.calinkfedilinkEnglish6•7 months 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-square@Jessica@discuss.tchncs.delinkfedilinkEnglish3•7 months agoPage 2 under contours: https://pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf
minus-square@meyotch@slrpnk.netlinkfedilinkEnglish1•7 months 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-square@sixCats@lemmy.dbzer0.comlinkfedilinkEnglish2•7 months 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
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