... :-)
geographic 3D is an art ...
I've been using MI, VM, a whole bunch of home grown tools to produce my 3D
models, as well as a lot of time consuming trial and error ... and a few
years later I can tell you :
To produce a good 3D model, a good tool is necessary, that's sure (and MI
alone isn't what I would call a good tool for this), but it needs too an
understanding of all the underlying processes (from the tools limitations
to the graphic hardware capacities, going thru the generating and rendering
processes). MI push button generation is easy, but doesn't allow for going
this far and deep... unless you're mastering the tools from the guts (ie,
you're part of MI developpers crew...).
If you're interested in (imho !?!) good geo3D models go to my pages
www.geovrml.com for a sneak peek ... the site is still under construct, so
just take it as a preview ...
I'll communicate a bit more on it as soon as it'll be finished, for I'm
introducing new paradigms for 3D terrain exploration and simulation tools
(like 3D intervisibility that can't be displayed in 2D ...), and i'll like
some feedback from the list, but I'll wait for ringing the bells (i'm off
for vacations right now ... :-)))
Have a nice (working?) day ;-)
Eric.
-----Message d'origine-----
De: Brown, Christopher (HI Cartographer)
[SMTP:[EMAIL PROTECTED]]
Date: jeudi 10 aout 2000 05:50
A: [EMAIL PROTECTED]
Objet: MI Enter a Whole New Dimension! V6 3D Map View
V6 3D Map View
"Enter a Whole New Dimension!"
"Drape...
Take a complete map - including roads, polygons and raster images -
and drape it over 3D contours. An unbelievable way to improve everything
you
do."
!!!!
The above was taken from the MI v6.0 glossy brochure. The pictures look OK.
Maybe a bit blocky but much better than I can produce!
Has anyone tried to do the same?
I gridded a table of contours (1m Interval) & spot heights digitised from
1:10,000 aerial photography.
I chose the smallest cell size MI would let me. Otherwise the rest of the
settings were default.
Upon creation of the mig file I placed the vector contours and roads over
the grid and created a 3D view.
The draping of the vectors over the grid was so bad it wasn't worth
proceeding. I tried overlaying a 1m resolution raster over the grid and the
same?
Go to 3D view properties and increase the resolution, still the same?
I am going to see if there is any tutorial sample data on the MI6 CD now
and
see if I can produce something at least half as good as what is shown on
the
brochure!!
Any feedback welcome.
Chris
Chris Brown - Cartographer
Business Operations Planning, Hamersley Iron P/L
152-158 St. George's Terrace,
Perth, Western Australia 6000
GPO Box A42,
Perth, Western Australia 6837
Tel. +61 8 9327 2176
Fax. +61 8 9327 2478
mailto:[EMAIL PROTECTED]
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