--- a/pkg/imports/fm.go	Fri Feb 07 12:35:11 2020 +0100
+++ b/pkg/imports/fm.go	Fri Feb 07 19:38:48 2020 +0100
@@ -62,10 +62,11 @@
 	// Constructor returning pointer to struct
 	// representing featuretype's properties
 	newProps func() interface{},
+	// Construct pointer to featuretype from given pointSlice and properties
+	newFeat func(pointSlice, interface{}) interface{},
 ) (
-	// Elements can be converted to []interface{}{p, fp} with
-	// p being a pointSlice and fp of the type of argument props.
-	fms [][]interface{},
+	// Slice of features to be converted to featuretypes type
+	fms []interface{},
 	epsg int,
 	err error,
 ) {
@@ -147,7 +148,7 @@
 					return err
 				}
 
-				f := []interface{}{p, props}
+				f := newFeat(p, props)
 				fms = append(fms, f)
 			default:
 				unsupported[feature.Geometry.Type]++