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General => File Sharing => Topic started by: bigben on May 28, 2007, 01:08:05 AM

Title: Grand Canyon TERs
Post by: bigben on May 28, 2007, 01:08:05 AM
Links to this terrain set have been moved to: http://forums.planetside.co.uk/index.php?topic=1762.0 (http://forums.planetside.co.uk/index.php?topic=1762.0)

The last two look really useful for creating masks for different vegetation cover (esp. farms) and tree distributions and are indexed colour :)
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Following on from http://forums.planetside.co.uk/index.php?topic=1574.0 (http://forums.planetside.co.uk/index.php?topic=1574.0) Here is a link to my terrains..

Enjoy

Ben
PS. Almost forgot the demo QTVR:
http://www.path.unimelb.edu.au/~bernardk/tgdemo/big_ditch.mov (http://www.path.unimelb.edu.au/~bernardk/tgdemo/big_ditch.mov) 325kb
Title: Re: Grand Canyon TERs
Post by: Buzzzzz on May 28, 2007, 03:07:41 AM
Thanks Ben! You are a real asset to the Community! And I'll be sure to Credit you if I produce anything I Post with your work included.  :)
Title: Re: Grand Canyon TERs
Post by: Sethren on May 28, 2007, 03:59:20 AM
These are nice, thank you kindly. I see the Great Basin/Range in there to. I am obsessed with the whole fault-block formations in Nevada although the Alluvial Fans are the really hard part to do. This will give me a better understanding on how to re-create these synthetically. The Grand Canyon is nice to of course.     ;D
Title: Re: Grand Canyon TERs
Post by: bigben on May 28, 2007, 08:02:54 AM
These are nice, thank you kindly. I see the Great Basin/Range in there to. I am obsessed with the whole fault-block formations in Nevada although the Alluvial Fans are the really hard part to do. This will give me a better understanding on how to re-create these synthetically. The Grand Canyon is nice to of course.     ;D

I'm not entirely sure which area you're refering to but if you like fault block formations I have another set of DEMs you're going to love based around Bitter Creek (the name from one of the DEMs)

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(from an old TER without the surrounding SRTM data)

I'm going through my other DEM archives as well. Working on Glacier NP at the moment. Having the low res detail for the horizon means I can now render views that I avoided in TG0.9 because of the sudden drop off... (especially Glacier NP near the Canadian border) and you can get a very wide coverage for the "cost" of a single 8193 TER.

Other data I have archived includes Yosemite, Choclate Drop, Monument Valley and of course the Tetons. Still haven't ventured up around Mt Hood, St Clair etc...  maybe later.

Server space is not really an issue for me at the moment so it's quite easy to share
Title: Re: Grand Canyon TERs
Post by: Sethren on May 28, 2007, 09:10:15 AM
I'm not entirely sure which area you're refering to but if you like fault block formations I have another set of DEMs you're going to love based around Bitter Creek (the name from one of the DEMs)

The "outer terrain" DEM in the upper far left corner. That looks like the great basin unless my eyes are playing tricks on me.     ;D

Title: Re: Grand Canyon TERs
Post by: garcia on May 28, 2007, 11:01:31 PM
Thanks Ben,awesome work :o would there be a full sized heightmap of the terrain available for mask work????


Robert..
Title: Re: Grand Canyon TERs
Post by: bigben on May 28, 2007, 11:09:47 PM
Yes... My workaround requires a conversion to GEOTIFF. Do you want just the largest terrain?  I'll also add a slope map which is useful for manually drawing rivers and selecting lakes (not many lakes in this one, but it's a big help in areas like Glacier NP)
Title: Re: Grand Canyon TERs
Post by: bigben on May 28, 2007, 11:26:56 PM
Looks like I deleted them...  I can redo one tonight or you can use Terraconv (http://koti.mbnet.fi/pkl/tg/TerraConv.htm) to convert the TER to TIFF.  I have to load the data again anyway to generate the slope mask.
Title: Re: Grand Canyon TERs
Post by: garcia on May 28, 2007, 11:33:51 PM
I can make one up,just thought you might have had one done...but knowing the order of each .ter in the square would help :)
Title: Re: Grand Canyon TERs
Post by: bigben on May 29, 2007, 12:51:00 AM
Filenames are from highest res (00) to lowest (03). They are loaded lowest to highest res otherwise the low res would flatten the high res. I normally rename my heightfield nodes with the filenames, I got slack this time  ;)
Title: Re: Grand Canyon TERs
Post by: ProjectX on May 29, 2007, 01:56:16 PM
That's a great terrain there, magnificent! Now if only we had a shader to make coloured strata for us. Hmm... I'll have a look at making one.
Title: Re: Grand Canyon TERs
Post by: bigben on May 30, 2007, 05:12:33 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: Grand Canyon TERs
Post by: rcallicotte on June 03, 2007, 01:38:06 PM
Nice!
Title: Re: Grand Canyon TERs
Post by: JDex on June 07, 2007, 09:14:52 AM
How did you accomplish the first attached render in the first post?  It appears to be a down-facing fisheye or dome master.
Title: Re: Grand Canyon TERs
Post by: bigben on June 12, 2007, 08:21:23 AM
It's an equirectangular image remapped to a circular fisheye projection...  360 degree fisheye image. 

Stitching and remapping using Panorama Tools
Title: Re: Grand Canyon TERs
Post by: BPauba on June 13, 2007, 07:22:37 AM
Ben, you are becoming the unofficial DEM provider of these forums! Many thanks man, I donít know if I will use them (I could never get the hang of DEMís) but I really appreciate the additional resources that you are providing for us all!

Title: Re: Grand Canyon TERs
Post by: bigben on June 13, 2007, 10:56:02 PM
It's easy enough for me to share this stuff at the moment (and to get the data) so it's not too much work for me.  It also forces me to document a bit more, so I won't be in such a hole the next time I want to update stuff.  I think it's also good to get people working on real scale terrains so they can help me with my other problems  ;)

I've nearly finished the update for this data set.... My efforts on the train this morning.... ->

This is another image from my composite terrains with 4 surface layers masked by raw images created from the canopy and landcover data (canopy and white, grey and blue colours from land cover). The landcover masks are intended more for controlling the distribution of other surfacing/objects so you still need to sort out the variation within this distribution. Their inclusion here is purely to preview the distribution. The canopy image on the other hand makes a useful density shader, although I'd add in some fractal variation if you were going to use it for surfaces.

I still have one more terrain to create to provide the padding around the  (which is why I chose a lower camera angle) but the 30m NEDs I need for this are hiding on me and I may have to download them again. Once I have that I'll release the updated terrains and supplementary images.  There is still some stepping in flat areas visible here at the bottom of the image so they will need some displacements to disguise them.

All of the terrain within the canyon is at 10m resolution, and the final TER will provide padding to a width of 160km for the same file size as a single 8193 TER.