[gdal-dev] Feature Style

[Geo Aspects Development]

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
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