An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater

http://marsoweb.nas.nasa.gov/landingsites/mer2003/topsites/final/Gusev/vrml/gusev.wrl

- Kurt

http://marsoweb.nas.nasa.gov/landingsites/mer2003/topsites/final/Gusev/vrml/gusev.wrl

What do you have to have to view that? In Blaxxun Contact, nothing shows. Is
it because it's an ElevationGrid?

Is shows with Blaxxun Contact.
It is white material with ground picture as a texture over it.... and the
picture is quite large. You should wait a while untill it loads.

Ah, here we are. In my browser's status bar it tells how much is loaded.
Takes 2 or 3 seconds to load, says End 100%, and does nothing. Then minutes
laters, the model appears. Why does this happen? I guess it takes a while to
calculate the image onto the surface.

It might be. My guess was it's because of size of the picture, but since
grid is comlicated adjusting may take time.

<snip > >

I have corresponded with the web site manager about this. Apparently
it is the size of jpg overlay which is 480kb that is causing the no
display in Cortona and MS IE 6.0, although it seems to load fine in
NN 7.0 and CosmoP. Using a smaller resampled overlay image of 247kb,
it works in Cortona and MS IE 6.0. I have corresponded with the
website manager. They are aware of the problem.

What is the size in pixels ?
Common limits of VRML browsers, graphicsdrivers and graphicscards are
currently about 1024x1024 or 2048x2048.

http://www.vterrain.org/LargeTextures/

I think, currently it is not very wise to use something bigger than
1024x1024.

http://www.geovrml.org/archive/msg00507.html

so long
MUFTI
--
NICHT FRÄULEIN OUT
(aus einer Webseite Stichwort: "Miss")

1280x1021

A lot of browser rescale this to 1024x1024 or 2048x2048.
Rescaling is a lengthly process and often break the quality of the bitmap.

so long
MUFTI
--
! WARNING: Debugging this process may result in loss of data.
Are you sure you wish to attach the debugger ?
Yes No
(aus einer Windows Fehlermeldung)

Hi

yes thats a bad size
1024*1024 would be better because it would avoid the re-scaling.

One can go to higher resolutions e.g. 2k / 4k depending on Card,
in Contact one need to ********ly allow this via Preferences->Performance
or Browser.setOption
For performance improvements (in local setups) I would recommend using DDS
DXT 1 compressed textures with precomputed MIP-MAPS. DDS Images can be
easily created using
the NVIDIA Photopshop DDS plugin.

-- Holger

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1 23rd April 10:18 fisherka External User Posts: 1	An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater http://marsoweb.nas.nasa.gov/landingsites/mer2003/topsites/final/Gusev/vrml/gusev.wrl - Kurt

2 2nd May 19:41 dale External User Posts: 1	An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater http://marsoweb.nas.nasa.gov/landingsites/mer2003/topsites/final/Gusev/vrml/gusev.wrl What do you have to have to view that? In Blaxxun Contact, nothing shows. Is it because it's an ElevationGrid?

3 2nd May 19:41 boris External User Posts: 1	An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater Is shows with Blaxxun Contact. It is white material with ground picture as a texture over it.... and the picture is quite large. You should wait a while untill it loads.

4 2nd May 19:41 dale External User Posts: 1	An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater Ah, here we are. In my browser's status bar it tells how much is loaded. Takes 2 or 3 seconds to load, says End 100%, and does nothing. Then minutes laters, the model appears. Why does this happen? I guess it takes a while to calculate the image onto the surface.

5 2nd May 19:42 boris External User Posts: 1	An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater It might be. My guess was it's because of size of the picture, but since grid is comlicated adjusting may take time.

8 22nd May 17:12 boris External User Posts: 1	An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater 1280x1021

9 22nd May 17:12 joerg scheurich aka mufti External User Posts: 1	An interesting example of a VRML terrain map - Mars Spirit landing site in Gustav Crater A lot of browser rescale this to 1024x1024 or 2048x2048. Rescaling is a lengthly process and often break the quality of the bitmap. so long MUFTI -- ! WARNING: Debugging this process may result in loss of data. Are you sure you wish to attach the debugger ? Yes No (aus einer Windows Fehlermeldung)