[postgis-users] GML vs SVG {-5.2}

[Sean Montague]

This is where I am getting confused.  I read in places that people are using xslt to display GML as SVG.  Are these people not reading the data from a database?  Storing the data as GML and displaying it as SVG.  Which if this is a case, then to read directly from a database like postgreSQL and PostGIS, GML is a wasted step if the ultimate format is SVG.  What I'd really like is a caparison of GML vs SVG, if it is appropriate.  SVG is very powerful and I know it well.  I've written apps that query a MySQL database and have customized some tools.   I'm just trying to figure out if I should learn GML.  Is there something about GML that is an advantage over SVG?  Thanks.

>>> pramsey at refractions.net 04/07/04 10:08AM >>>
Sean Montague wrote:
> I have made many a map with SVG, but I'm new to PostGIS.  So new in
> fact that I haven't even installed it yet.  I've been using MySQL,
> but have come to the conclusion that postgreSQL is the way to go.
> So, for those of you familiar with both SVG and GML, can you explain
> the relationship between the two, it seems they are not mutually
> exclusive, and why wouldn't I write directly to SVG if a map ends up
> in SVG anyway?  I'm trying to sort through all this to determine the
> direction I should go in.  Thanks.

If you are determined to write out SVG then certainly GML gives you 
nothing in terms of advantage. If you are building a more generic 
infrastructure, then a WFS (web feature server that serves GML) on top 
of your database can provide a nice generic API to your underlying data.

-- 
       __
      /
      | Paul Ramsey
      | Refractions Research
      | Email: pramsey at refractions.net 
      | Phone: (250) 885-0632
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