Opened 11 years ago

Closed 3 years ago

#362 closed enhancement (wontfix)

Geography needs an extent aggregate function

Reported by: robe Owned by: pramsey
Priority: medium Milestone: PostGIS Fund Me
Component: postgis Version: master
Keywords: Cc:


I guess its too late to squeeze this in for 1.5.0? But I think we really need an Extent function for Geography.

Just noticed the Add Datastore feature doesn't work out of the box with geography because its trying to call Extent on it (well that's the complaint I get out of the bat). I don't use that mode much anyway so I personally don't care aside from the effect on newbie user experience.

Which brings up the other question that we really need to get the word out with 3rd party tools to switch to using the ST_ version of the functions if we hope to ever bury them. I guess that is a story for another day.

Change History (6)

comment:1 Changed 11 years ago by robe

Oops for clarity. The add Data Store Layer of OpenJump?. I was comparing what tools know what to do with geography without any change.

comment:2 Changed 11 years ago by mcayland

Hmmmm I'm sure this was brought up in previous discussions, but yeah I'd say this is something we need for a 1.5 release as ST_Extent() is one of first functions an application will run when it opens a layer.

comment:3 Changed 11 years ago by pramsey

And after ST_Extent, what's the next function that's going to be called? And after that? Extent is very ill-defined on the sphere. Think about a pole-encircling polygon or a date-line traversing linestring. What's the proper extent? How is it interpreted? If you want a half-assed extent, then call ST_Extent(thecolumn::geometry), right?

comment:4 Changed 11 years ago by robe

Okay that answers that question. That's why I put it in the future. I unlike Mark don't have quite a sense of urgency. Still experimenting with what functions each tool taps into, so my objective is to see how far geography can go without requiring change to underlying desktop/web tools.

Hmm I think we need an ST_Transform (which returns a geometry). But yes I was thinking a half-assed extent :).

comment:5 Changed 3 years ago by robe

Milestone: PostGIS FuturePostGIS Fund Me

Milestone renamed

comment:6 Changed 3 years ago by pramsey

Resolution: wontfix
Status: newclosed
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