--- a/pkg/controllers/cross.go	Thu Nov 15 13:47:04 2018 +0100
+++ b/pkg/controllers/cross.go	Thu Nov 15 15:50:02 2018 +0100
@@ -45,50 +45,21 @@
 	return dst, nil
 }
 
-func projectBack(
-	rp *models.Reprojector,
-	lines octree.MultiLineStringZ,
-	ctx context.Context,
-) (models.GeoJSONMultiLineCoordinatesZ, error) {
-
-	out := make(models.GeoJSONMultiLineCoordinatesZ, len(lines))
-
-	for i, segment := range lines {
+const projectBackSQL = `
+SELECT ST_AsBinary(
+  ST_Transform(ST_GeomFromWKB($2, $1::integer), 4326))`
 
-		coords := make(models.GeoJSONLineCoordinatesZ, len(segment))
-		out[i] = coords
-		for j, v := range segment {
-			lat, lon, err := rp.Reproject(v.X, v.Y, ctx)
-			if err != nil {
-				return nil, err
-			}
-			coords[j] = models.GeoJSONCoordinateZ{Lat: lat, Lon: lon, Z: v.Z}
-		}
-	}
-	return out, nil
-}
-
-const clipSQL = `
-SELECT ST_AsBinary(ST_Transform(ST_Multi(ST_Intersection(
-  ST_Transform(area::geometry, $1::integer),
-  ST_GeomFromWKB($2, $1::integer))), 4326))
-FROM waterway.sounding_results
-WHERE bottleneck_id = $3 AND date_info = $4::date`
-
-func clipAgainstArea(
+func projectBack(
 	line octree.MultiLineStringZ,
 	epsg uint32,
-	bottleneck string,
-	dateInfo time.Time,
 	conn *sql.Conn,
 	ctx context.Context,
 ) (models.GeoJSONMultiLineCoordinatesZ, error) {
 
 	var mls models.GeoJSONMultiLineCoordinatesZ
 	err := conn.QueryRowContext(
-		ctx, clipSQL,
+		ctx, projectBackSQL,
 		epsg, line.AsWKB(),
-		bottleneck, dateInfo,
 	).Scan(&mls)
 
 	return mls, err
@@ -177,13 +148,12 @@
 	start = time.Now()
 
 	var joined models.GeoJSONMultiLineCoordinatesZ
-	joined, err = clipAgainstArea(
+	joined, err = projectBack(
 		segments, tree.EPSG,
-		csi.Properties.Bottleneck, csi.Properties.Date.Time,
 		conn, req.Context(),
 	)
 
-	log.Printf("clipping and projecting back took: %s\n", time.Since(start))
+	log.Printf("projecting back took: %s\n", time.Since(start))
 	if err != nil {
 		return
 	}