#285: FAQ When should I user geography over geometry
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Reporter: robe | Owner: pramsey
Type: task | Status: new
Priority: medium | Milestone: postgis 1.5.0
Component: postgis | Version: trunk
Keywords: |
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Someone asked me this and it sounds like a question we will be getting
often from both novices as well as existing users.
I was thinking in the geography side of things -- could whip up a feature
matrix (an autogenerated one with some xsl voodoo magic that)
For each function that takes as input geography/geometry mark off whether
it supports geometry/geography like with T meaning it uses a geometry
transform operation so not native and yes/no being native or non-existent.
We can put a special tag in each function description to easily pull the
transform question out.
function geometry geography
ST_Buffer yes T
ST_Distance yes yes
ST_DWithin yes yes
Then we need the descriptive FAQ of what geometry/geography offers from a
performance/use case perspective I guess. E.g. support by third party
tools and loaders etc. What range (are you dealing with regional or all
over the world) -- etc.
So kind of like a questionaire type thing to consider before using one or
the other.
--
Ticket URL: <
http://trac.osgeo.org/postgis/ticket/285>
PostGIS <
http://trac.osgeo.org/postgis/>
PostGIS
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