3D map
As with any graphic technique, the utility and appropriateness depend on the objective of the presentation. Showing polygons in persective according to some attribute is certainly not inherently a bad idea. Here are a couple of examples from experimental GIS software develped in the 1970s. ESRI's 3D Analyst has these capabilities and there are examples of that software on the web. Denis White US EPA, 200 SW 35th St, Corvallis, Oregon, 97333 USA voice: 541.754.4476, email: white.denis at epa.gov web: www.epa.gov/wed/pages/staff/white/ (See attached file: example1.prism.jpg)(See attached file: example2.prism.jpg) r-sig-geo-bounces at stat.math.ethz.ch wrote on 2005-10-29 11:55:47:
Yes, I kind of thought about that myself... Thanks! I will just drop
it.
Mihai Nica, ABD Jackson State University 170 East Griffith Street G5 Jackson, MS 39201 601 914 0361
From: Roger Bivand <Roger.Bivand at nhh.no> Reply-To: Roger.Bivand at nhh.no To: "Edzer J. Pebesma" <e.pebesma at geo.uu.nl> CC: Mihai Nica <m_nica at hotmail.com>, <r-sig-geo at stat.math.ethz.ch> Subject: Re: [R-sig-Geo] 3D map Date: Sat, 29 Oct 2005 09:45:29 +0200 (CEST) On Sat, 29 Oct 2005, Edzer J. Pebesma wrote:
Mihai Nica wrote:
Could someone advise about a way to draw a 3D map... say the map
of US
states having as elevation the number of people in each state. Am
I
missing
something? A 3D map search revealed nothing helpful. Thanks, mihai Mihai Nica, ABD Jackson State University 170 East Griffith Street G5 Jackson, MS 39201 601 914 0361
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You may want to try persp, or wireframe in lattice.
That was what I thought first, but I think it actually is the 3D
histogram
or exploding pie chart question, how to make a 3D representation of columns of regular or irregular polygons scaled by some z variable in height. The reader will see different things depending on viewing
point
and height, I would not in general recommend it as either a
presentation
or analytic graphic. Roger
-- Edzer
-- Roger Bivand Economic Geography Section, Department of Economics, Norwegian School
of
Economics and Business Administration, Helleveien 30, N-5045 Bergen, Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43 e-mail: Roger.Bivand at nhh.no
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