What data and readers are you map builders currently using
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Thanks,
StevenB
The ".tar.gz" is a UNIX compression system and I don't know if WinZip will handle them. Get WinImp and unzip them to their final stage, which should yield all the files fully uncompressed.Wooly wrote:I have a DEM question too. I downloaded Microdem, but I am having trouble opening the DEM files I downloaded. Mircrodem V10 that I downloaded came with one DEM file already, Hanging Rock Canyon, CA, and the exact file name is HangRockCanyon_DEM_2.tar.gz. It opens fine in Microdem. I downloaded 2 DEM files from the USGS website (following the tutorial I found here at the forums), but they won't open. They are the same file types though, w140n40.tar.gz and w140n90.tar.gz, respectively. I can't figure out why they won't open. They are in the same folder with the map that works too. I know they are compressed files, but apparently that is the correct format for the maps. Any ideas?
I should add, that in the tutorial, the files in the DEM folder are .hdr files for "header". But it appears to be different in this version of Microderm.
No, there are several data sets that are compatible with MICRODEM. There are some lower resolution data sets, as well as some sets that I think offer 1 meter resolution. I'm not sure what they are, but I think I remember them being some special satellite data. Anything that you can bring into MICRODEM should be suitable for generating a heightmap. Check the MICRODEM documentation for compatible data types. If I get some time (next week is Spring Break) I'll look into it.Hawk wrote:Question Wolvy - is the GTOPO30 the only data we can use for RRT3?
Yeah, Wolverine answered it better than I could. There were several different databases at the USGS website, and I think Microdem can handle several of them. There was one called SRTM, which I think was better than GTOP30, but I think you had to pay to get that data. The GTOP30 was free, and it had a tutorial, so I have never tried anything else. I have been VERY pleased with the GTOP30 data and Microdem though. It was very easy to use and learn, and it gave fantasic results. Sometimes when I have a spare minute, I make a 3d map of someplace just for the fun of it (yea, I am a map nerd). It takes like 15 minutes to make a nice map.Hawk wrote:Question Wolvy - is the GTOPO30 the only data we can use for RRT3?
I'm pretty sure the newest version of Microdem will do this automatically, or at least there is a menu command for merging them when loading.Wooly wrote: Not that I am an expert, but I noticed it was not in the tutorial, and (even thought it's pretty straight forward) someone might find it useful to have step by step instructions for merging data from different GTOP30 map sections.
Oh yeah, it's a menu command, and pretty easy to do. I just thought that an exact step by step guide with a few pointers might be useful to some people.Wolverine@MSU wrote:I'm pretty sure the newest version of Microdem will do this automatically, or at least there is a menu command for merging them when loading.Wooly wrote: Not that I am an expert, but I noticed it was not in the tutorial, and (even thought it's pretty straight forward) someone might find it useful to have step by step instructions for merging data from different GTOP30 map sections.