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    Need a way to create contours from gps data

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    • N Offline
      nantax
      last edited by

      It seems that the board will only allow one attachment. I'm zipping the other files from the first post.


      pataan.zip

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      • GaieusG Offline
        Gaieus
        last edited by

        I find it kind of "interesting" that you pay for a work - obviously with the intention to use that data - and they only provide images and such. Here is a plugin called "kml tools" however, you can try this to import geometry:
        http://forums.sketchucation.com/viewtopic.php?t=38009
        This is a "predecessor" of the above plugin - it actually says it can do what you need:
        http://forums.sketchucation.com/viewtopic.php?t=36210

        Gai...

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        • B Offline
          bjornkn
          last edited by

          You might also find GPSBabel useful for converting between different formats:
          http://www.gpsbabel.org/

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          • N Offline
            nantax
            last edited by

            Thank you for the tip Gaieus & bjornkn.

            I have no part with the agreement of the owner and the surveyor. I was plugged in the middle of the survey schedule to "watch and learn". And they are expecting a bit much from half a day of watching the guy walk around the parcel of land with his gps device. πŸ˜’

            Anyway I spent the day tinkering with ArcGIS 9 and was able to create a surface that is quite far from the surface that they have included in the cd. I will just poke around with this and hopefully if I can't get anywhere, they will send me to the firm for training. πŸ˜„

            my messed up tin surface

            I tried the kml plugin but it just outputs nothing to import. I might be doing something wrong and maybe it is because of this line: "SketchUp's current capabilities of KMZ do not go beyond Collada models", and I have no idea what that means either.

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            • N Offline
              nantax
              last edited by

              This is a screen shot of the avi movie that they have included in the cd:

              pataan 3d avi.jpg

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              • N Offline
                nantax
                last edited by

                parcel of pataan lot as seen in google earth

                This is going to be developed into a resort in the future. No actual schedule for it, more like being cooked in the backburner in low fire. πŸ˜„


                kml file of pataan lot

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                • TIGT Offline
                  TIG Moderator
                  last edited by

                  Once you have got the data as some sort of 'points-cloud' they are several tools to turn that into a surface mesh.
                  Once you have that my ContourMaker.rb tool will add grouped contours over the surface...

                  TIG

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                  • N Offline
                    nantax
                    last edited by

                    Thanks Tig, I already downloaded lots of your plugins and I am excited with the actual laying out of roads and putting the proposed huts/cottages than the actual generation of the surface in which I have no idea on how to proceed...

                    Basically I think that i have to extract the data from the kml for the lot boundary, then I have to extract and plot out the gps points + elevation as point cloud and then map out the surface. I will try to do them next week since it is already late here and I am suffering from GIS burnout. It is tough to do something when you have zero knowledge about it. πŸ‘Š

                    Thank you all for the reply.

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                    • TIGT Offline
                      TIG Moderator
                      last edited by

                      Here's a mesh file and what went into making it - scale/dims etc are probably to pot... BUT you can fix that... Capture.PNGpataan_waypointsMESHED.zipFirst I opened the gtm file with GPStrackmaker[free] and saved it in various 'readable' formats [in the zip]. The GoogleEarth kml file was the easiest.
                      [As it turned out the eneormous [??] 'original' kml file that was provided in the thread a bit late[r] would probably have been even easier and contains more data...]
                      http://forums.sketchucation.com/viewtopic.php?p=335779#p335779 Arelieus's KMLtools should import a kml file but it fails [?] with both versions!
                      So I parsed it into its lines of "longitude,latitude,altitude" using Ruby's split on '<coordinates>', then split'<' etc. Then read those lines in and parsed again and used 'pt=model.latlong_point([lon,lat])' on the first two and added the third as a 'pt.z=elv' to that point, then wrote that point data out to a CSV file.
                      Used Didier's tool to import the points cloud. Edited out a few points that were way off in altitude and Triangulated the rest to make a mesh. Used my ContourMaker to add '1m' contours.
                      I suggest you redo the geometry making steps using the CSV and set units/scale etc to suit better...
                      I only did a quick bodge to show it could be done, somehow πŸ˜‰

                      TIG

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                      • P Offline
                        Plex
                        last edited by

                        Amazing Tig!
                        Not bad to have guy like you around. Really! πŸ˜‰

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                        • N Offline
                          nantax
                          last edited by

                          Tig, you are simply amazing!

                          Ruby scripting is way beyond me right now, but I really appreciate the effort you have exerted on this project. There is a big gap from the gathering data from the GPS unit to importing it to SketchUp but you showed us a way. I will try to redo it and learn as much as possible from it.

                          I also appreciate your mentioning of the workflow on how you approached it.

                          Thank you very much!

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                          • N Offline
                            nantax
                            last edited by

                            pataan.jpg

                            Call it dumb luck, but I came across this post:
                            http://groups.google.com/group/Sketchup-Pro/browse_thread/thread/ca7d0ba921af4611

                            Then I tried opening ArcScene, selected the tin surface, then added the face elevation with graduated color ramp from the symbology properties, and exported it in 3d vrml (.wrl). I then imported it in Blender 3d and exported it as collada (.dae). I don't know much about Blender 3d and I can't figure out how to display the imported data but just the same, I when I imported it to SketchUp, the surface was there together with the colors. 😍

                            Not as clean as the surveyor's version, but it is almost there.


                            pataan.rar

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