OpenSceneGraph Forum Forum Index OpenSceneGraph Forum
Official forum which mirrors the existent OSG mailing lists. Messages posted here are forwarded to the mailing list and vice versa.
 
   FAQFAQ    SearchSearch    MemberlistMemberlist    RulesRules    UsergroupsUsergroups    RegisterRegister 
 Mail2Forum SettingsMail2Forum Settings  ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
   AlbumAlbum  OpenSceneGraph IRC ChatOpenSceneGraph IRC Chat   SmartFeedSmartFeed 

About vpbmaster problem


 
Post new topic   Reply to topic    OpenSceneGraph Forum Forum Index -> General
View previous topic :: View next topic  
Author Message
GuiYe
Guest





PostPosted: Mon May 16, 2011 1:39 pm    Post subject:
About vpbmaster problem
Reply with quote

Hi robert,


when I ran command like:


vpbmaster --bluemarble-west -t land_shallow_topo_west.tif --bluemarble-


east -t land_shallow_topo_east.tif -t N30-E096_ll_cut.tif -d dem.tif --


geocentric -v 1.0 -o earth/earth.ive


The result was as shown in the picture annexed.

Can you tell me how to make terrain smooth?


Thank you!

------------------
Post generated by Mail2Forum
Back to top
Chris 'Xenon' Hanson
Guest





PostPosted: Mon May 16, 2011 3:15 pm    Post subject:
About vpbmaster problem
Reply with quote



------------------
Post generated by Mail2Forum
Back to top
GuiYe
Guest





PostPosted: Mon May 16, 2011 11:38 pm    Post subject:
About vpbmaster problem
Reply with quote

Thank you for your reply!


Yes,I want to use vpbmaster to make earth with some dem and Satellite -Images. How should I do?


Could you give some suggestion?


Thank you!

Quote:
At 2011-05-16 23:15:27,"Chris Xenon Hanson" <> wrote:

Quote:
On 5/16/2011 7:39 AM, GuiYe wrote:
Quote:
 The result was as shown in the picture annexed.
 Can you tell me how to make terrain smooth?

  It is not clear from your request what you want. If you wanted it all 'smooth', don't
load the dem.tif. But I suspect that's not what you really want.

Quote:
 Thank you!

-- 
Chris 'Xenon' Hanson, omo sanza lettere.  http://www.alphapixel.com/
  Digital Imaging. OpenGL. Scene Graphs. GIS. GPS. Training. Consulting. Contracting.
    "There is no Truth. There is only Perception. To Perceive is to Exist." - Xen


------------------
Post generated by Mail2Forum
Back to top
Chris 'Xenon' Hanson
Guest





PostPosted: Tue May 17, 2011 12:00 am    Post subject:
About vpbmaster problem
Reply with quote



------------------
Post generated by Mail2Forum
Back to top
zonk
Appreciator


Joined: 23 May 2009
Posts: 621

PostPosted: Tue May 17, 2011 6:21 am    Post subject:
Reply with quote

Hi GuiYe,

do you want a smooth elevation transition from area with DEM to area without DEM?

Then you have several possibilities:
a) modify your DEM sources to a image format, and at the border of your DEM region blend the gray values smoothly into the null value

b) modify your viewer to perform runtime elevation modifikation to create a smooth transition

c) Modify osgdem to create the transition.


Cheers,
Torben
Back to top
View user's profile Send private message
GuiYe
Guest





PostPosted: Tue May 17, 2011 8:11 am    Post subject:
About vpbmaster problem
Reply with quote

Thank you very much for your reply!


Yes,I want to do a smooth elevation transition from area with DEM to area without DEM.


About this possibility:
Quote:
a) modify your DEM sources to a image format, and at the border of your DEM region blend the gray values smoothly into the null value


Can you give me more information?The dem.tif is some of ASTER 30m Data.How I should do ?


Thank you !


Cheers,
GuiYe



At 2011-05-17 14:21:40,"Torben Dannhauer" <> wrote:


Quote:
Hi GuiYe,

do you want a smooth elevation transition from area with DEM to area without DEM?

Then you have several possibilities:
a) modify your DEM sources to a image format, and at the border of your DEM region blend the gray values smoothly into the null value

b) modify your viewer to perform runtime elevation modifikation to create a smooth transition

c) Modify osgdem to create the transition.

Thank you!

Cheers,
Torben

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=39446#39446








------------------
Post generated by Mail2Forum
Back to top
zonk
Appreciator


Joined: 23 May 2009
Posts: 621

PostPosted: Tue May 17, 2011 9:35 am    Post subject:
Reply with quote

Hi,

You use ASTER data? Am I right that ASTER is public available? I played 2 years ago with the ASTER data as it was initially released. It has great resolution, but it had also lots of artefacts. Do you use raw or somehow corrected ASTER data? - As you can see, I'm on the never ending quest for public available DEM and texture data Smile

Well, in the DEM raster data, some value represents zero meters elevation. To achieve a smooth transition, you should blend at the border of your source images from your original value to that null value.

In a geotiff, this would be a blending of the grey value (which represents the elevation). You can perform this blending in a graphical software like gimp. Your blending zone has to be a "frame" at the border of your DEM region. You have to blend from the original elevation value to the 0 meters elevation value -for example with a alpha value ramp (inside your blending zone 100% elevation and 0% 0-meters-color, at the outer border of your DEM-Data 0% elevation and 100% 0-meters-color)

Sorry for that bad explanation.. Smile

Cheers,
Torben
Back to top
View user's profile Send private message
GuiYe
Guest





PostPosted: Tue May 17, 2011 3:17 pm    Post subject:
About vpbmaster problem
Reply with quote

Thank you!


How about strm 90m DEM? Do you make terrain in earth as I do?


Cheers,
GuiYe



At 2011-05-17 17:35:48,"Torben Dannhauer" <> wrote:


Quote:
Hi,

You use ASTER data? Am I right that ASTER is public available? I played 2 years ago with the ASTER data as it was initially released. It has great resolution, but it had also lots of artefacts. Do you use raw or somehow corrected ASTER data? - As you can see, I'm on the never ending quest for public available DEM and texture data Smile

Well, in the DEM raster data, some value represents zero meters elevation. To achieve a smooth transition, you should blend at the border of your source images from your original value to that null value.

In a geotiff, this would be a blending of the grey value (which represents the elevation). You can perform this blending in a graphical software like gimp. Your blending zone has to be a "frame" at the border of your DEM region. You have to blend from the original elevation value to the 0 meters elevation value -for example with a alpha value ramp (inside your blending zone 100% elevation and 0% 0-meters-color, at the outer border of your DEM-Data 0% elevation and 100% 0-meters-color)

Sorry for that bad explanation.. Smile

Cheers,
Torben

------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=39454#39454








------------------
Post generated by Mail2Forum
Back to top
Display posts from previous:   
Post new topic   Reply to topic    OpenSceneGraph Forum Forum Index -> General All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

Similar Topics
Topic Author Forum Replies Posted
No new posts Problem compiling OSG 3.4.1 osgDB 64 bit tonyor Build system [build] 0 Thu Sep 21, 2017 12:41 am View latest post
No new posts Problem blending multiple render passes antiro42 General 5 Sat Sep 09, 2017 9:44 am View latest post
No new posts osgText::Text problem robertosfield General 5 Thu Aug 17, 2017 12:23 pm View latest post
No new posts Problem to load images robertosfield General 10 Mon Aug 07, 2017 10:36 pm View latest post
No new posts Multi layer effect rendering problem ... not3not4 General 0 Wed Jul 19, 2017 9:44 am View latest post


Board Security Anti Bot Question MOD - phpBB MOD against Spam Bots
Powered by phpBB © 2001, 2005 phpBB Group
Protected by Anti-Spam ACP