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Scale-adaptive Projection
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Spanring, Christian  
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 More options Mar 7 2012, 5:57 pm
From: "Spanring, Christian" <CSpanr...@mapc.org>
Date: Wed, 7 Mar 2012 17:57:43 -0500
Local: Wed, Mar 7 2012 5:57 pm
Subject: Scale-adaptive Projection

Interesting project from Oregon. I remember Weave users talking about that kind of functionality. How feasible would a Weave implementation be?

Scale-adaptive Projection
http://cartography.oregonstate.edu/temp/AdaptiveProjection/

(Sent from Flipboard<http://flipboard.com>)

Christian

________________________________
Please be advised that the Massachusetts Secretary of State considers e-mail to be a public record, and therefore subject to the Massachusetts Public Records Law, M.G.L. c. 66 § 10.


 
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David Percy  
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 More options Mar 7 2012, 6:07 pm
From: David Percy <pe...@perika.com>
Date: Wed, 7 Mar 2012 15:07:00 -0800
Subject: Re: Scale-adaptive Projection

that's neat with vector data, but I don't think it scales well with tiles
:-)
interesting idea, though...

hmmm, I suppose if you had a cache of background tiles (like OSM) in each
of those projections it could work, the cartography when zoomed out gets a
little easier...

On Wed, Mar 7, 2012 at 2:57 PM, Spanring, Christian <CSpanr...@mapc.org>wrote:

--
David Percy ("Percy")
-Geospatial Data Manager
-Web Map Wrangler
-GIS Instructor
Portland State University
-gisgeek.pdx.edu
-geology.pdx.edu
-portlandpulse.org

 
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Georges Grinstein  
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 More options Mar 7 2012, 6:00 pm
From: Georges Grinstein <grinst...@cs.uml.edu>
Date: Wed, 7 Mar 2012 18:00:27 -0500
Local: Wed, Mar 7 2012 6:00 pm
Subject: Re: Scale-adaptive Projection

I think it's doable (in a few years when we've finished al the high priority items).

Georges Grinstein
Professor - Computer Science Department
Director - Institute for Visualization and Perception Research
Director - Center for Biomolecular and Medical Informatics
University of Massachusetts Lowell
Lowell MA 01854
t: 978.934.3627
f: 978-934-3551
c: 508-331-8161
http://www.cs.uml.edu/
grinst...@cs.uml.edu

On Mar 7, 2012, at 5:57 PM, Spanring, Christian wrote:


 
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Andy Dufilie  
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 More options Mar 7 2012, 7:44 pm
From: Andy Dufilie <andy.dufi...@gmail.com>
Date: Wed, 7 Mar 2012 19:44:46 -0500
Local: Wed, Mar 7 2012 7:44 pm
Subject: Re: Scale-adaptive Projection

If there's a library or an algorithm available, we could use it or port it,
but considering that the shapefile is simplified greatly, the performance
of that demo is very poor.

Andy

On Wed, Mar 7, 2012 at 5:57 PM, Spanring, Christian <CSpanr...@mapc.org>wrote:


 
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Spanring, Christian  
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 More options Mar 7 2012, 8:22 pm
From: "Spanring, Christian" <CSpanr...@mapc.org>
Date: Wed, 7 Mar 2012 20:22:19 -0500
Local: Wed, Mar 7 2012 8:22 pm
Subject: Re: Scale-adaptive Projection

In the future, everything will be vector. Apparently the Google team demoed 6 million vertices rendered in the browser through their HTML5/WebGL implementation last week at Strata:

http://mano-demos.googlecode.com/svn/trunk/slides/strata2012/index.ht...

Christian

On Mar 7, 2012, at 6:07 PM, David Percy wrote:

that's neat with vector data, but I don't think it scales well with tiles :-)
interesting idea, though...

hmmm, I suppose if you had a cache of background tiles (like OSM) in each of those projections it could work, the cartography when zoomed out gets a little easier...

On Wed, Mar 7, 2012 at 2:57 PM, Spanring, Christian <CSpanr...@mapc.org<mailto:CSpanr...@mapc.org>> wrote:
Interesting project from Oregon. I remember Weave users talking about that kind of functionality. How feasible would a Weave implementation be?

Scale-adaptive Projection
http://cartography.oregonstate.edu/temp/AdaptiveProjection/

(Sent from Flipboard<http://flipboard.com/>)

Christian

________________________________
Please be advised that the Massachusetts Secretary of State considers e-mail to be a public record, and therefore subject to the Massachusetts Public Records Law, M.G.L. c. 66 § 10.

--
David Percy ("Percy")
-Geospatial Data Manager
-Web Map Wrangler
-GIS Instructor
Portland State University
-gisgeek.pdx.edu<http://gisgeek.pdx.edu/>
-geology.pdx.edu<http://geology.pdx.edu/>
-portlandpulse.org<http://portlandpulse.org/>


 
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Andy Dufilie  
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 More options Mar 7 2012, 9:00 pm
From: Andy Dufilie <andy.dufi...@gmail.com>
Date: Wed, 7 Mar 2012 21:00:24 -0500
Local: Wed, Mar 7 2012 9:00 pm
Subject: Re: Scale-adaptive Projection

Image tiles could actually perform better, because there would be less
coordinates to project.  If the tiles are small enough, you can get a
decent looking map using a 4x4 grid of points for each tile (to generate
the triangles on which the tile will be rendered).


 
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