[gdal-dev] unable to write a shapefile using ogr

[Kyle Shannon]

Beau,

On Wed, Sep 10, 2014 at 7:30 AM, Beau Taylor <purelyamethyst at gmail.com> wrote:
> The following program successfully creates a shape file I am requiring.
>
> from osgeo import ogr
> from osgeo import osr
>
> def myRing(coords):
>     ring = ogr.Geometry(ogr.wkbLinearRing)
>     for xy in coords:
>         ring.AddPoint(xy[0],xy[1])
>     return ring
>
> coords = [(-23.378906,68.974164), (-23.378906,34.307144),
> (31.464844,34.307144), (31.464844,68.974164), (-23.378906,68.974164)]
>
> ring = myRing(coords)
> poly = ogr.Geometry(ogr.wkbPolygon)
> poly.AddGeometry(ring)
>
> outDriver = ogr.GetDriverByName('ESRI Shapefile')
> data_source = outDriver.CreateDataSource('test.shp')
> srs = osr.SpatialReference()
> srs.ImportFromEPSG(4326)
> layer = data_source.CreateLayer('test.shp', srs, ogr.wkbPolygon)
>
> feature = ogr.Feature(layer.GetLayerDefn())
> feature.SetGeometry(poly)
> layer.CreateFeature(feature)
>
> feature.Destroy
> data_source.Destroy()
>
> However, I did not know how to do the followings:
>
> -set the color of outer ring as blue,
> -do not fill the polygen

Style is usually dictated by the application.  You can set them in the
app, or for some formats/drivers you can use the OGR style API:

http://gdal.org/ogr_feature_style.html

AFAIK, shapefiles do not support styles

> -name the feature as 'test'

Add a field to the feature definition, called 'name', see the
tutorial, I think it has that exact example:

http://gdal.org/ogr_apitut.html

>
> I hope someone can help me.
>
> Thanks in the advance.
> Beau
>
> _______________________________________________
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> gdal-dev at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/gdal-dev

If you are using GDAL/OGR 1.x, use the docs at:

http://gdal.org/1.11/index.html


-- 
Kyle