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-rw-r--r--src/transformations/deformation.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/transformations/deformation.cpp b/src/transformations/deformation.cpp
index c28e1489..0e0d641c 100644
--- a/src/transformations/deformation.cpp
+++ b/src/transformations/deformation.cpp
@@ -92,7 +92,7 @@ static PJ_XYZ get_grid_shift(PJ* P, PJ_XYZ cartesian) {
/* look up correction values in grids */
shift.lp = proj_hgrid_value(P, geodetic.lp);
- shift.enu.u = proj_vgrid_value(P, geodetic.lp);
+ shift.enu.u = proj_vgrid_value(P, geodetic.lp, 1.0);
if (proj_errno(P) == PJD_ERR_GRID_AREA)
proj_log_debug(P, "deformation: coordinate (%.3f, %.3f) outside deformation model",