These items are also supported in SDF today:
- SRS is a must, complete projection parameters (stored as WKT).
- full set of attibute types (c, int2, int4, int8, float, double,
txt (i18l), date and timestamps (with gmt precise offset), blobs, ...
- indexing (unique and non-unique) on key attributes
The only exception is that I do not believe SDF supports the blob data type.
There is also support for range constraints.
Bob
----- Original Message -----
From: "Paul Spencer" <[EMAIL PROTECTED]>
To: "OSGeo Discussions" <discuss@lists.osgeo.org>
Sent: Wednesday, November 14, 2007 5:24 AM
Subject: Re: [OSGeo-Discuss] Re: idea for an OSGeo project -- a new,open
data format
On 14-Nov-07, at 7:20 AM, Christopher Schmidt wrote:
- optional coloring and styles, break values, rendering and
scale limits, persistent joins or relates, color ramp, ...
are things which are provided by SLD and the like, which means that you
really want SDF + WMC -- I don't think that this is SDF's job, and I
don't think that it should be the job of any geodata format.
mapinfo files come with embedded styling so there is at least one format
out there that combines the two. KML arguably does the same thing.
I think it would be worth exploring the merits of providing the ability
to embed styling information. I'm not sure if it is useful to place
styling 'hints' in metadata, assuming that the format supports arbitrary
metadata.
Cheers
Paul
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|Chief Technology Officer |
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