comp.lang.idl-pvwave archive
Messages from Usenet group comp.lang.idl-pvwave, compiled by Paulo Penteado

Home » Public Forums » archive » Re: Need help in IDLgrSurface and vertical exaggeration
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Return to the default flat view Create a new topic Submit Reply
Re: Need help in IDLgrSurface and vertical exaggeration [message #47909 is a reply to message #47898] Thu, 16 March 2006 07:04 Go to previous messageGo to previous message
K. Bowman is currently offline  K. Bowman
Messages: 330
Registered: May 2000
Senior Member
In article <1142502700.236024.214300@v46g2000cwv.googlegroups.com>,
raval.chintan@gmail.com wrote:

> Hello,
>
> I am facing some problems with surface object in IDL.
>
> I have DEM Data for ALPS mountain range which I want to visualize as a
> surface and do a flythrough.
>
> Data dimensions are 800x800
> Pixel resolution is of 25 meters
> Minimum height in the data set is 0 meters
> Maximum height is 3500 meters.
>
> I have been able to create the surface out of this dataset but I do not
> get the proper depth perception.
>
> I have even set the projection property to 2 but the mountains
> certainly do not seem to be much of mountains.

The vertical exaggeration is a function of the data space into which you put the
surface. Try this to see the effect of changing the vertical coordinate range:

IDL> z = 7.0*dist(800)
IDL> print, min(z), max(z)
0.00000 3959.80
IDL> isurface, z
IDL> isurface, z, zrange = [0.0, 10000.0]

You will need to do something similar with whatever you are using to display the
IDLgrsurface.

Ken Bowman
[Message index]
 
Read Message
Read Message
Read Message
Read Message
Read Message
Previous Topic: Re: File sizes and the SAVE command
Next Topic: Re: 4D interpolation

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Fri Oct 10 06:55:37 PDT 2025

Total time taken to generate the page: 1.92120 seconds