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https://issues.apache.org/jira/browse/SIS-8?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13232346#comment-13232346
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Peter Karich commented on SIS-8:
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Hey Chris, the file Hengl_2009_GEOSTATe2c1_f.pdf is somehow damaged - I cannot 
open it. Would you mind to post a working link or explain what you mean with 
this issue? Or a reference to the commits you did?
                
> Build a common SIS data container for spatial data
> --------------------------------------------------
>
>                 Key: SIS-8
>                 URL: https://issues.apache.org/jira/browse/SIS-8
>             Project: Spatial Information Systems
>          Issue Type: New Feature
>          Components: geometry objects, storage
>            Reporter: Chris A. Mattmann
>            Assignee: Chris A. Mattmann
>             Fix For: 0.3-incubating
>
>
> The QuadTreeNode has the concept of a data container per node in the QTree, 
> but I'd like to extend this to a general SIS spatial data type. This would in 
> part be motivated by e.g., [1], where the suggestion is something like:
> {quote}
> Any measurement we take in Earth and environmental sciences, although this is 
> often ignored, has a spatio-temporal reference. A spatio-temporal reference 
> is determined by (at least) four parameters:
> 1. geographic location (longitude and latitude or projected X,Y coordinates);
> 2. height above the ground surface (elevation);
> 3. time of measurement (year, month, day, hour, minute etc.);
> 4. spatio-temporal support (size of the blocks of material associated with 
> measurements; time interval of measurement);
> {quote} 
> [1] 
> http://www.lulu.com/items/volume_67/8010000/8010854/5/print/Hengl_2009_GEOSTATe2c1_f.pdf

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