diff --git a/src/utils.jl b/src/utils.jl
index 4f8dc2cc..e45c4e71 100644
--- a/src/utils.jl
+++ b/src/utils.jl
@@ -1173,6 +1173,23 @@ function InterpolateDataFields2D(Original::CartData, New::CartData; Rotate=0.0,
     return CartData(New.x.val,New.y.val,Znew, fields_new)
 end
 
+"""    
+    Surf_interp = InterpolateDataFields2D(V::GeoData, x::AbstractRange, y::AbstractRange;  Lat::Number, Lon::Number)
+
+Interpolates a 3D data set `V` with a projection point `proj=(Lat, Lon)` on a plane defined by `x` and `y`, where `x` and `y` are uniformly spaced.
+Returns the 2D array `Surf_interp`. 
+"""
+function InterpolateDataFields2D(V::GeoData, x::AbstractRange, y::AbstractRange;  Lat=49.9929, Lon=8.2473)
+    # Default: Lat=49.9929, Lon=8.2473 => Mainz (center of universe)
+    proj = ProjectionPoint(; Lat = Lat, Lon = Lon)
+    return InterpolateDataFields2D(V::GeoData, proj, x, y)
+end
+
+function InterpolateDataFields2D(LonLat::GeoData, proj::ProjectionPoint, x::AbstractRange, y::AbstractRange)
+    cart_grid = CartData(XYZGrid(x, y, 0))
+    tproj = ProjectCartData(cart_grid, LonLat, proj)
+    return tproj.z.val[:, :, 1]
+end
 
 """
     InterpolateDataFields2D_vecs(x_vec, y_vec, depth, fields_new, X, Y)
@@ -1326,19 +1343,7 @@ function InterpolateDataOnSurface(V::GeoData, Surf::GeoData)
 
     return Surf_interp
 end
-
-"""    
-    Surf_interp = InterpolateTopographyOnPlane(V::GeoData, proj::ProjectionPoint, x::AbstractRange, y::AbstractRange)
-
-Interpolates a 3D data set `V` with a projection point `proj` on a plane defined by `x` and `y`, where are uniformly spaced.
-Returns the 2D array `Surf_interp`. 
-"""
-function InterpolateTopographyOnPlane(V::GeoData, proj::ProjectionPoint, x::AbstractRange, y::AbstractRange)
-    cart_grid = CartData(XYZGrid(x, y, 0))
-    tproj = ProjectCartData(cart_grid, V, proj)
-    return tproj.z.val[:, :, 1]
-end
-
+  
 # Extracts a sub-data set using indices
 function ExtractDataSets(V::AbstractGeneralGrid, iLon, iLat, iDepth)
 
diff --git a/test/test_utils.jl b/test/test_utils.jl
index 573fe49d..e2f28e83 100644
--- a/test/test_utils.jl
+++ b/test/test_utils.jl
@@ -10,6 +10,16 @@ Vx1,Vy1,Vz1     =   Data1*3,Data1*4,Data1*5
 Data_set2D      =   GeoData(Lon,Lat,Depth,(Depthdata=Data1,LonData1=Lon, Velocity=(Vx1,Vy1,Vz1)))  
 @test_throws ErrorException CrossSection(Data_set2D, Depth_level=-10)
 
+# Test interpolation of depth to a given cartesian XY-plane
+x = 11:19
+y = 31:39
+plane1 = InterpolateDataFields2D(Data_set2D, x, y)
+proj   = ProjectionPoint()
+plane2 = InterpolateDataFields2D(Data_set2D, proj, x, y)
+
+@test plane1 == plane2
+@test all(==(-50e0), plane1)
+
 # Create 3D volume with some fake data
 Lon,Lat,Depth   =   LonLatDepthGrid(10:20,30:40,(-300:25:0)km);
 Data            =   Depth*2;                # some data