OGR wkb formats

types = { 'Point': ogr.wkbPoint,
'LineString': ogr.wkbLineString,
'Polygon': ogr.wkbPolygon,
'MultiPoint': ogr.wkbMultiPoint,
'MultiLineString': ogr.wkbMultiLineString,
'MultiPolygon': ogr.wkbMultiPolygon,
'GeometryCollection': ogr.wkbGeometryCollection
}