Planetside Software Forums

General => File Sharing => Topic started by: bigben on May 29, 2007, 02:47:30 AM

Title: Glacier N.P. TERs
Post by: bigben on May 29, 2007, 02:47:30 AM
I'm in the process of updating my DEM data so if download time is a problem for you then I suggest waiting a bit.  I'm going to replace as much SRTM data as my RAM will allow with 1/3" NED from USGS. I'll also release a set of images for use in creating additional masks for each of my terrain sets.
  • GlobalMapper Slope shader (for lakes and rivers)
  • NLCD 2001 Landcover
  • NLCD 2001 Canopy

The last two look really useful for creating masks for different vegetation cover (esp. farms) and tree distributions and are indexed colour :)

Here's a second set of TERs. Only 5 coverage this time (I forgot to check how wide I made the Grand Canyon terrains) but it's still plenty of padding around the central area of 10m DEMs. I've done plenty of renders around this area in TG0.9 so I can certainly appreciate just how much of an improvement you can get with TG2 using this method.

InnerOuter
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Terrains: http://www.path.unimelb.edu.au/~bernardk/terragen/files/bb_glacier_composite.exe (http://www.path.unimelb.edu.au/~bernardk/terragen/files/bb_glacier_composite.exe) 71Mb, self-extracting RAR
Slope map: http://www.path.unimelb.edu.au/~bernardk/terragen/files/bb_glacier_composite_slope_map.exe (http://www.path.unimelb.edu.au/~bernardk/terragen/files/bb_glacier_composite_slope_map.exe) 43Mb, self-extracting RAR

The slope map is a 10,000x10,000 pixel greyscale image using GlobalMapper's slope shader. I find this really useful for selecting lakes. With DEM data they're white and if surrounded by even the faintest of grey it's enough to use the magic wand in Photoshop to quickly select them... and there's a lot of lakes here. It also makes drawing rivers manually easier, as you can usually see when you're going up the side of a bank.

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There's a clip file with the slope map to correctly size any images derived from it. The slope map only covers the middle 3 TERs as I normally only render around the middle and extending it further makes the image too big or cuts down the resolution.
Title: Re: Glacier N.P. TERs
Post by: dhavalmistry on May 29, 2007, 04:00:58 PM
WOW!! thanx
Title: Re: Glacier N.P. TERs
Post by: bigben on May 29, 2007, 09:33:40 PM
You're welcome.

For those using the slope map for generating lakes:

It's been ages since I logged on to Geocommunity and I found you now need a Premium account to download data. I'll try and update my data from USGS seamless to improve these TERs at a later date.
Title: Re: Glacier N.P. TERs
Post by: bigben on May 29, 2007, 10:32:07 PM
OK I'm getting some odd scaling effects on this so you may want to wait before downloading while I check things out.
Title: Re: Glacier N.P. TERs
Post by: bigben on May 30, 2007, 05:14:00 AM
I'm in the process of updating my DEM data so if download time is a problem for you then I suggest waiting a bit.  I'm going to replace as much SRTM data as my RAM will allow with 1/3" NED from USGS. I'll also release a set of images for use in creating additional masks for each of my terrain sets.

The last two look really useful for creating masks for different vegetation cover (esp. farms) and tree distributions and are indexed colour :)
Title: Re: Glacier N.P. TERs
Post by: rcallicotte on June 03, 2007, 01:36:15 PM
Thank you!