[geos-devel] Approaches for ZM and beyond

[Tyler Mitchell]

Thanks for all the feedback guys..  lots to chew on :)

On 2013-03-05, at 6:05 PM, Martin Davis wrote:

> For JTS there has been no substantive change from the situation in the mentioned thread.  I have however been thinking about how to add Measure support, both in a non-breaking way to the current JTS, and as part of a thorough revamp of the core Geometry API (JTS 2!).
> 
> But I'm not sure how this will translate to GEOS. From Sandro's comments about the performance cost of making Coordinate a virtual class it sounds like this would actually be harder for GEOS than for JTS.
> 
> For the record, my current thinking it should be possible to provide a CoordinateZM class for JTS, which extends the current Coordinate class, and which can be used by specifying a matching CoordinateZMArraySequence.  Then there's the issues of how far exactly the M support should extend.  WKT probably...  WKB perhaps?  Other I/O classes (Oracle could use this...).  
> 
> All it takes is time and money...
> 
> As for other SFS 1.2 types - ditto.
> 
> 
> 
> On 3/5/2013 11:53 AM, Tyler Mitchell wrote:
>> Hi guys,
>> 
>> What are GEOS users and devs doing to enable M measures in their GEOS-backed solutions?  I won't worry about specialised functions at this point, but at least being able to reliably handle and maintain all XYZM ordinates is important for me.  Is it such a lot of work that it's not worth adding this to GEOS?  I saw a few messages in the archives looking at how to add measures but it wasn't encouraging ;)
>> 
>> Do you think GEOS will support all the SFSQL 1.2 types?
>> 
>> Are people moving to Boost or CGAL instead?  Would love to hear thoughts on it.
>> 
>> Cheers,
>> Tyler
>> 
>> 
>> Tyler Mitchell
>> Engineering Director 
>> Actian Corporation
>> tyler.mitchell at actian.com
>> 
>> MOBILE 250-303-1831
>> SKYPE spatialguru
>> www.actian.com
>> 
>> 
>> 
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Tyler Mitchell
Engineering Director 
Actian Corporation
tyler.mitchell at actian.com

MOBILE 250-303-1831
SKYPE spatialguru
www.actian.com

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