[OSGeo-Discuss] Re: idea for an OSGeo project -- a new, open data format

Robert Bray rbray at robertbray.net
Wed Nov 14 07:04:21 PST 2007

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.


----- Original Message ----- 
From: "Paul Spencer" <pspencer at dmsolutions.ca>
To: "OSGeo Discussions" <discuss at 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
> +-----------------------------------------------------------------+
> |Paul Spencer                          pspencer at dmsolutions.ca    |
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> |Chief Technology Officer                                         |
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