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Time for Time in GIS
posted by Satri
on Friday September 15, @01:05PM
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from the it's-about-time dept.
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from the it's-about-time dept.
Christian Spanring links to a FOSS4G2006 open document presentation named It's About Time for Time. From the abstract: ""The weakness of current cartography is its poor representation of time. The surface
of the earth is treated as a static thing." (Anselm Hook) [...] There are
numerous experiments, but little solid support in tools or data structures for
representing the 4th dimension (when we're still getting used to the 3rd dimension in
GIS)." The time capabilities of GeoRSS and Google Earth are mentioned. Previous poll on time.
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Misleading
(Score:3, Interesting)( http://pthbb.org/ )
In Bob we trust, all others bring data.
Time, 2.5D and 3D
(Score:3)( http://alexandreleroux.blogspot.com/ | Last Journal: Friday March 17, @05:07PM )
What sometimes/often annoys me is collegues around me thinking they're doing 3D while, in my interpretation, they're doing 2.5D. Many of them have even difficulties distinguising 2.5D and 3D! Real 3D is when you have x, y, z and associated attributes, thus multiple z values for each x, y. It is widely used in oil and gas exploration GIS software. Another example of real 3D is in meteorology. While 2.5D is x, y, z where z is the height, but you have only one height per x-y pair so z is an attribute as any other attribute of the x-y pair. Thus, topography and '3D' building in Google Earth aren't real 3D, they're 2.5D.
Am I too zealous??
this is a great idea
(Score:2, Interesting)( http://www.piratelaws.com/ )
Pirate Laws [piratelaws.com]. The rules for being a pirat
for what problems?
(Score:4, Insightful)As we think of ways to add more junk to GIS, it's important to remember the most important concept of cartography, an abstraction removes noise to leave signal.