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madmat

Manitoba Mesh problems

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Hi all,I have had a bit of success creating some LOD8 and 9 meshes for western Canada but I am having a bear of a time with the Manitoba data. Every time I try to create anything, either using srtm to bgl or even by hand, I wind up with very odd results.For example, I have the CDED 1:250,000 data and I mergerd 6 dems using Microdem latest build. I then converted this to a bsq and created an ini for resample. So far, so good. I notice Microdem said it was decim data so I set the scaleinmeters=.1 and I created a bgl that looks fairly representative of the data I fed it.I then tried the next 6 dems and this is where it got wierd. Same data source, programs and ini but a blank bgl, nothing to see in bglviewer. I tried using SRTM 3 arc second data from the USGS server but wind up with a totally flat landscape and wierdness. Just with the Manitoba data it seems.I am open to any sugestions or help. I even deleted the data and redownloaded it just to see what would happen, no luck.Thanks,Dwayne

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Dwayne: Something basically wrong is happening.Your explanation is not objective. Better if you sendback a copy of your Manitoba's INF (or ini?) file.Some questions:1) Did you check the size of your final dem file?2) During resampling and (or) compiling process, didyou observe if it was all right? The compressing process,for example? I'll happy if can help you.Cheers, Celso.

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Hi Dwayne,Set your ScaleInMeters to 1 and see what happens. The Decimal is just the system used to designate coordinates, not anything to do with the Scale in meters of your source data.----Justinhttp://www.fsgenesis.netHigh Quality Scenery for FS200x

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Hi Justin,With the CDED, the decim value is important. With my Nunavut mesh, this was important to respect the elev units. Here is an example of the result when I change the ScaleInMeterd to 1 (m) to (0.1) decim.http://forums.avsim.net/user_files/61212.jpgThis example is localized in Manitoba.Salut Gilles

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I Dunno, I've also used the CDED data quite extensively and have always used the ScaleInMeters=1 with no ill effects.The Scale in Meters is basically there in case you have some source elevation data in feet instead of meters, in which case you'd want to change the value to .3028.-------Justinhttp://www.fsgenesis.netHigh Quality Scenery for FS200x

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Howdy:Justin, the ScaleInMeters=0.1 setting was necessary when using MicroDEM for pre-processing because it didn't read the CDED header correctly. Seems like Manifold wins again ;-)I think this issue has been addressed in the latest version of MicroDEM. The other option was to edit the header of the MicroDEM .dem file.Cheers, Holger

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HI Holger and all,Ah, that would explain it. To my knowledge, all CDED elevations are in meters. But if Microdem changes or otherwise interprets that differently, the change would be needed.I haven't used Microdem since the beta of Manifold 5.5 sp2 came out, so I wasn't aware of that limitation.Thanks for the clarification-------Justinhttp://www.fsgenesis.netHigh Quality Scenery for FS200x

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Hi Justin and Holger,Clarification : I use Microdem to merge some CDED files to made a new large DEM.Salut Gilles

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