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    Finding usable DEMS in this day and age

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    • T Offline
      tspco
      last edited by

      I know this has been discussed before, I have been using Cadmapper to get my DEMS, it works OK but getting exactly what you want is difficult, without a satellite view to go by.
      I just spent the past hour or so trying to find what I want on the USGS site nothing that will work with SU2017 make.
      Ideas for other sources?

      SU make 2017, /Twilight Render Hobby
      Windows 10,64 bit,16GB ram, quad core Athlon 3.6 gHz proc. Anything else you want to know, ask me.

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      • Dave RD Offline
        Dave R
        last edited by

        What is it you actually need and in what area? How will the data get used?

        Etaoin Shrdlu

        %

        (THERE'S NO PLACE LIKE)

        G28 X0.0 Y0.0 Z0.0

        M30

        %

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        • Rich O BrienR Online
          Rich O Brien Moderator
          last edited by

          https://cs.heightmap.skydark.pl/

          I've used this in the past because you can download RAW file that's 32bit. Even the default PNG can give good results depending on how distant you are....

          heightmap.png

          terrain.png

          [mod=:29zjzejc]Fixed my awful spelling πŸ˜›[/mod:29zjzejc]

          Download the free D'oh Book for SketchUp πŸ“–

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          • T Offline
            tspco
            last edited by

            @dave r said:

            What is it you actually need and in what area? How will the data get used?

            Out place in the Nebraska panhandle, I am doing some virtual scenes of what I want to do.

            SU make 2017, /Twilight Render Hobby
            Windows 10,64 bit,16GB ram, quad core Athlon 3.6 gHz proc. Anything else you want to know, ask me.

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            • T Offline
              tspco
              last edited by

              @rich o brien said:

              https://cs.heightmap.skydark.pl/

              I've used this n the past because you can download RAW file that a 32bit. Even to default PNG can give good results depending on how distant you are....

              [attachment=1:2ja2j9wz]<!-- ia1 -->heightmap.png<!-- ia1 -->[/attachment:2ja2j9wz]

              [attachment=0:2ja2j9wz]<!-- ia0 -->terrain.png<!-- ia0 -->[/attachment:2ja2j9wz]

              I downloaded a png, there must be more to this?

              SU make 2017, /Twilight Render Hobby
              Windows 10,64 bit,16GB ram, quad core Athlon 3.6 gHz proc. Anything else you want to know, ask me.

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              • Rich O BrienR Online
                Rich O Brien Moderator
                last edited by

                The PNG has black to white values. Pure black is no height and pure white is highest point.

                Displace a subdivided mesh using this PNG as the driver for the height. Your subdivided mesh should match the pixel density to the PNG to get accurate results.

                Download the free D'oh Book for SketchUp πŸ“–

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