func (layer *Layer) Wkts() chan string {
wkts := make(chan string)
go func() {
defer close(wkts)
C.OGR_L_ResetReading(layer.v)
for {
feature := C.OGR_L_GetNextFeature(layer.v)
if feature == nil {
break
}
geom := C.OGR_F_GetGeometryRef(feature)
var res *C.char
C.OGR_G_ExportToWkt(geom, &res)
wkts <- C.GoString(res)
C.CPLFree(unsafe.Pointer(res))
C.OGR_F_Destroy(feature)
}
}()
return wkts
}
// Fetch geometry as WKT
func (geom Geometry) ToWKT() (string, error) {
var p *C.char
err := C.OGR_G_ExportToWkt(geom.cval, &p).Err()
wkt := C.GoString(p)
return wkt, err
}