[gdal-dev] Reading OGRStyle information using C++

[Brian Case]

Aneesh

i believe the only driver that supports layer andf dataset style tables
is the libkml driver

Brian


On Thu, 2012-01-05 at 18:06 +0530, Aneesh Muralidharan wrote:
> Chaithanya,
> 
> Ahhh that explains it ! Thanks a lot. By the way where do I find out
> these information (like DXF driver doesn't support style table), as in
> where is it documented ?
> 
> And can you suggest me some other vector format that OGR loads by
> default, which has style information ? I was using SHP till now, but
> then it doesn't have the style information at all right. Also it will
> be great if you can point me to some place where I can find some free
> samples as well.
> 
> On Thu, Jan 5, 2012 at 5:51 PM, Chaitanya kumar CH
> <chaitanya.ch at gmail.com> wrote:
>         Aneesh,
>         
>         I don't know if the DXF format maintains a default style or a
>         style table but OGR's DXF driver doesn't support layer's style
>         table.
>         
>         
>         On Thu, Jan 5, 2012 at 5:30 PM, Aneesh Muralidharan
>         <symonando at gmail.com> wrote:
>                 Hi Chaithanya,
>                 
>                 Thanks for the quick reply
>                 
>                 About the style table, I did try to use the layer
>                 style table, but I'm getting an empty table :(
>                 
>                 By the way I'm trying to read a simple DXF file. 
>                 
>                 On Thu, Jan 5, 2012 at 4:57 PM, Chaitanya kumar CH
>                 <chaitanya.ch at gmail.com> wrote:
>                         A layer's style table can be accessed using
>                         OGRLayer::GetStyleTable() [1].
>                         
>                         [1]:
>                         http://www.gdal.org/ogr/classOGRLayer.html
>                         
>                         
>                         On Thu, Jan 5, 2012 at 4:55 PM, Chaitanya
>                         kumar CH <chaitanya.ch at gmail.com> wrote:
>                                 Aneesh,
>                                 
>                                 A layer can have a style table that
>                                 stores a set of styles that can be
>                                 referred by individual features.
>                                 Usually the style table has a default
>                                 style.
>                                 
>                                 Its usage is explained in the same
>                                 page as the OGR Feature Style
>                                 Specification.
>                                 
>                                 On Thu, Jan 5, 2012 at 3:45 PM, Aneesh
>                                 Muralidharan <symonando at gmail.com>
>                                 wrote:
>                                 
>                                         Hi,
>                                         
>                                         I'm new to OGR/GDAL and I'm
>                                         trying to read style
>                                         information of vectors using
>                                         the OGR C++ API. I followed
>                                         the documentation available
>                                         here
>                                         http://www.gdal.org/ogr/ogr_feature_style.html. I have managed to get the pen information of the glyphs' in vector file successfully.
>                                         
>                                         The problem is that, it is
>                                         unclear that from where can I
>                                         figure out the layer style
>                                         specification. i.e the global
>                                         style for the layer ( assuming
>                                         each glyph's pen can be either
>                                         one of its own or dependent on
>                                         the layer ). The
>                                         OGRFeatureDefn for the
>                                         OGRLayer doesn't seem to have
>                                         this information.
>                                         
>                                         Also is there any detailed
>                                         explanation of the API
>                                         somewhere with some sample
>                                         code snippets ? (for the
>                                         feature-style api. For
>                                         read/write I know there is
>                                         http://www.gdal.org/ogr/ogr_apitut.html)
>                                         
>                                         Hoping for a quick response
>                                         
>                                         Thanks and regards,
>                                         Aneesh Muralidharan
>                                         
>                                         
>                                         _______________________________________________
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>                                 
>                                 
>                                 
>                                 -- 
>                                 Best regards,
>                                 Chaitanya kumar CH.
>                                 
>                                 +91-9494447584
>                                 17.2416N 80.1426E
>                         
>                         
>                         
>                         -- 
>                         Best regards,
>                         Chaitanya kumar CH.
>                         
>                         +91-9494447584
>                         17.2416N 80.1426E
>                         
>                 
>                 
>         
>         
>         
>         -- 
>         Best regards,
>         Chaitanya kumar CH.
>         
>         +91-9494447584
>         17.2416N 80.1426E
>         
> 
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