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111000@reddthat.com to Cool Guides@lemmy.caEnglish · 2 years ago

How to read topographic maps

reddthat.com

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How to read topographic maps

reddthat.com

111000@reddthat.com to Cool Guides@lemmy.caEnglish · 2 years ago
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  • Ulvain@sh.itjust.works
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    2 years ago

    Everything reminds me of her

    • No_Eponym@lemmy.ca
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      2 years ago

      Giggity giggity!

  • Deebster@programming.dev
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    I always found these very intuitive, but I don’t know if that’s just due to having an analytical mind, or just learning this stuff early. Do people struggle to understand topographic maps?

    • DrMango@lemmy.world
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      I think your analytical mind got “typographic” and “topographic” mixed up…

      • Deebster@programming.dev
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        2 years ago

        Ah, was it a typo or topo that got autocorrected? We’ll never know (fixed, ta).

    • stebo@lemmy.dbzer0.com
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      deleted by creator

      • EldritchFeminity@lemmy.blahaj.zone
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        2 years ago

        It gives a basic idea, but I think something like Cities:Skylines where you can create maps using a height map and then get the topography lines in a 3d space where you can actively shift the camera around to see them overlaid from any angle would probably help people grasp the idea.

        Having said that, I’m now imagining drone footage overlaid with the height maps as an additional resource to standard topographical maps. Would be neat if somebody could create software that could calculate and overlay the height maps in real-time using the drone’s altimeter or something.

    • DAMunzy@lemmy.dbzer0.com
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      2 years ago

      In the Land Nav portion of PLDC (US Army training for becoming a Sergeant - is called something else now) there were soooooo many people that failed out/had to do it over again, that I was super worried when I did it. Seemed pretty damn easy to me. 🤷

  • sixCats@lemmy.dbzer0.com
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    2 years ago

    Except all of the hills could be valleys, you need to see the numbers on the contours

    • meyotch@slrpnk.net
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      2 years ago

      If it were a local depression instead of a hill, the lines would be hatch-marked on the side pointing into to depression.

      • BCsven@lemmy.ca
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        2 years ago

        Do you have an example, I either never have seen this or never had a depression on a map

        • misterdoctor@lemmy.world
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          2 years ago

          You want an example of local depression just swing by my place anytime

          • Herbal Gamer@sh.itjust.works
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            2 years ago

            heyoooo!

        • Illiterate Domine@infosec.pub
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          2 years ago

          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.

          • BCsven@lemmy.ca
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            2 years ago

            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

        • Jessica@discuss.tchncs.de
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          2 years ago

          Page 2 under contours: https://pubs.usgs.gov/gip/TopographicMapSymbols/topomapsymbols.pdf

          • BCsven@lemmy.ca
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            2 years ago

            Awesome, thankyou

        • meyotch@slrpnk.net
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          2 years ago

          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.

      • sixCats@lemmy.dbzer0.com
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        2 years ago

        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

  • JoShmoe@lemmy.zip
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    2 years ago

    I was expecting boobs for the last one. They’re almost there too.

    • samus12345@lemmy.world
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      2 years ago

      Yeah, very confusing to see an image like this that isn’t a smart-ass meme.

    • RatsOffToYa@lemmy.world
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      2 years ago

      Nature’s boobs

      • cygnus@lemmy.ca
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        2 years ago

        The Grand Tetons are named after boobs (grands tétons is roughly “big tits” in French)

  • Glimpythegoblin @lemm.ee
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    deleted by creator

    • Herbal Gamer@sh.itjust.works
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      2 years ago

      Thank you for your service o7

  • JustMy2c@lemm.ee
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    2 years ago

    Boobies.

    • Stretch2m@lemm.ee
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      2 years ago

      A couple of those remind me of a different part, from side-view.

  • ubermeisters@lemmy.world
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    deleted by creator

    • Rentlar@lemmy.ca
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      Have you considered the following?

      • EuroNutellaMan@lemmy.world
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        2 years ago

        Number 3 is basically just my chair if it was soft like a sofa instead of wood

        • Potatos_are_not_friends@lemmy.world
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          2 years ago

          Have you seen those chairs with butt imprints?

      • Squirrel@thelemmy.club
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        2 years ago

        There are depression contour lines for that purpose.

        • Pregnenolone@lemmy.world
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          2 years ago

          Depression contour lines are what I call my wrinkles

          • Rentlar@lemmy.ca
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            2 years ago

            I think this is the first time on Lemmy, where in a single thread I had simultaneously learned something interesting and educational and had laughed so hard, it is a rare occurence.

            Thank you and @squirrel@thelemmy.club for that.

        • funkless_eck@sh.itjust.works
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          2 years ago

          blows dust off old website

        • DarkMessiah@lemmy.world
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          2 years ago

          First time I’ve seen that, really don’t think it should’ve been my first time. Thanks!

        • sverit@feddit.de
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          2 years ago

          Holy shit, that website looks like DOS Norton Commander

      • ubermeisters@lemmy.world
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        deleted by creator

      • sbv@sh.itjust.works
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        why you gotta be like that

  • finnspiration@sopuli.xyz
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    I made an improved condensed version of this that still gets the point across drawn graphic a single lonely hill, below it another graphic of high hill with a smaller hill on the right side, below it graphic of two high standing hills beside each other, below it graphic of a high hill with another hill that has fallen and is flat

  • essell@beehaw.org
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    Those all look vaguely sexual to me.

    • cygnus@lemmy.ca
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      2 years ago

      My brother in Rorschach, you are not alone.

      • dmention7@lemm.ee
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        Hey, 111000 is the one who keeps showing us all the sexy pictures!

  • DroneRights [it/its]@lemm.ee
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    Boobs

  • Hikermick@lemmy.world
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    Also it helps to look at water on the map. Water always runs downhill. Runs combine to form creeks, creeks combine to form rivers, rivers pour into oceans and lakes. Water gets bigger on its way downhill. The dead end is a spring, it flows downhill from there

  • AgentGrimstone@lemmy.world
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    For the second one, do you need that many rings? Would using less still be correct?

    • nymwit@lemm.ee
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      Depends on the rest of the map. These are usually set up so the rings mean a certain consistent difference in elevation, say 1ft of 10ft. You don’t normally change the spacing partway through the map. If the intervals were 10ft and this was a 20ft peak then you’d obviously have fewer rings than if the intervals were 1ft.

    • OceanSoap@lemmy.ml
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      The rings are elevation placements. Less would be "correct in that they’d still signify elevations, it’s just less detailed.

      For example, the widest ring might be an elevation of 2470ft while the smallest ring might be 2570ft. If there are no rings in between, it’s still correct, you’re just not getting very detailed. You could easily be looking at a perfect sloap on all sides, like a smooth cone. But place 9 rings in between at 10ft more of elevation each, you’ve got a much more detailed idea of how a mountain or hill is shaped.

      So, correct, but not very useful.

      • emptiestplace@lemmy.ml
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        Utility may be subjective, but sloap perfection is forever.

    • Rai@lemmy.dbzer0.com
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      “Fewer.”

      rip stannus

  • verbalbotanics@beehaw.org
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    2 years ago

    This is pretty helpful for something like Zelda for me

  • MonkderZweite@feddit.ch
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    deleted by creator

  • DreBeast@lemmy.world
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    Throw some height in there and we’ll have a real party going

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