[postgis-devel] [PostGIS] #266: ST_Length for geography

[PostGIS]

#266: ST_Length for geography
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  Reporter:  robe         |       Owner:  pramsey      
      Type:  enhancement  |      Status:  closed       
  Priority:  medium       |   Milestone:  postgis 1.5.0
 Component:  postgis      |     Version:  trunk        
Resolution:  fixed        |    Keywords:               
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Comment (by robe):

 Hmm -- Paul I see you managed to sneak in the behavior of Perimeter in the
 ST_Length function for geography.  I must flag this as being inconsistent
 with geometry ST_Length which returns 0 for areals.

 I'm not so bothered about this inconsistency (since I consider returning 0
 for length of an areal kind of silly, but as much as I hate alias's and
 unnecessary function bloat, I think it might be prudent to introduce one
 for ST_Perimeter. The reason being -- my old-fashioned self-speaking:

 When I think of length -- I think Line (not polygon)
 When I think areal -- I don't think length, I think perimeter.

 I can only imagine old-fashioned thinkers like me will think the same, and
 that there are a large number of said people in our community.

 I'm going to leave this closed and you can reopen or change unless you
 think I am being unnecessarily petty.

-- 
Ticket URL: <http://trac.osgeo.org/postgis/ticket/266#comment:2>
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