[gdal-dev] Feature Style

[Geo Aspects Development]

Hello,

If you are using OGR, because certain drivers support reading/writing  
of FeatureStyles, you should probably try to build on top of them  
(which is what I have done - linking into the Quartz API of OS X with  
my own style clases)
OGCs web mapping standards use a format called SLD, web (vector)  
graphics use SVG. Flash is also a possibility. But none of these are  
supported by OGR.
I have not found any support for feature styles Oracle Spatial but  
PostGIS looks more promising (I have no experience of using it though)
There is also some movement on osgeo to set up a symbology database.

hope this helps!
Tim


On Mar 18, 2009, at 9:05 PM, Andy Tompkins wrote:

> Hi
>
> Thank you for the information!
>
> At my work, we have a proprietary spatial database.  We have outgrown
> our current structure used to describe the style of features as we  
> want
> to more richly describe the style.
>
> Can you suggest a replacement for us? What do others use?
>
> Thanks,
>
> Andy.
>
> On Tue, 17 Mar 2009 21:04 +0100, "Geo Aspects Development"
> <dev at geoaspects.com> wrote:
>> hi,
>>
>> The only format I have found which supports feature styles is MapInfo
>> tab files The spec is hardly supported at all, infact even the
>> dataSource/layer/ feature hierarchy is not supported - everything is
>> at feature level I would guess they are not widely used (for example,
>> you cannot even list the available styles (from either a StyleManager
>> or a StyleTable)
>> - something which is almost mandatory when writing a UI application)
>>  There is no "interpretation" as such - the string is parsed into
>>  parts or tools - its up to you how you interpret these components in
>>  the UI
>>
>> Although I realize its a complex area I must confess that I have had
>> more problems with this part of the API than the rest of OGR and GDAL
>> put together!
>>
>> Regards Tim
>>
>> On Mar 17, 2009, at 8:07 PM, Andy Tompkins wrote:
>>
>>> Hi,
>>>
>>> I have just started to use the feature styles in ogr_featurestyle.h,
>>> documented at http://www.gdal.org/ogr/ogr_feature_style.html.  I
>>> really like them.
>>>
>>> I have a few questions: How much are they supported? Are they widely
>>> used? The OGRStyleSymbol does not quite match the document.  The
>>> code has a  place for fontname and the doc has a place for outline
>>> style.  I assume the doc is correct? How is the angle for a symbol
>>> interpreted?  I assume as an absolute  angle.  I would like to draw
>>> arrows along a line to show direction, but each arrow symbol would
>>> need a different angle to match the tangent of the line.  Can I
>>> represent this with a SYMBOL string?
>>>
>>> Thanks in advance, Andy Tompkins
>>> _______________________________________________
>>> gdal-dev mailing list gdal-dev at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/gdal-dev
>>
>>
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