diff --git a/data/.gitignore b/data/.gitignore
new file mode 100644
index 0000000..e2e7327
--- /dev/null
+++ b/data/.gitignore
@@ -0,0 +1 @@
+/out
diff --git a/data/config.ini b/data/config.ini
index e0e702f..9d968b8 100644
--- a/data/config.ini
+++ b/data/config.ini
@@ -1,7 +1,8 @@
 [bathy]
-inp=Database_20220224.xyz
-sub=bathy_sub.npy
-out=bathy.npy
+inp=data/Database_20220224.xyz
+sub=out/bathy_sub.npy
+out=out/bathy.npy
+step=1
 
 [artha]
 lat=43.398450
diff --git a/data/processing/projection.py b/data/processing/projection.py
index 4f63591..6a7b2dd 100644
--- a/data/processing/projection.py
+++ b/data/processing/projection.py
@@ -32,7 +32,7 @@ bathy = np.stack(
         *projection.cartesian(bathy_curvi[:, 0], bathy_curvi[:, 1]),
         bathy_curvi[:, 2],
     ),
-    axis=1
+    axis=1,
 )
 log.debug(f"Cartesian bathy: {bathy}")
 
@@ -46,37 +46,18 @@ buoy_curvi = np.array(
 artha = np.asarray(projection.cartesian(*artha_curvi))
 buoy = np.asarray(projection.cartesian(*buoy_curvi))
 
-
-def display():
-    x = np.linspace(bathy[:, 0].min(), bathy[:, 0].max())
-    y = np.linspace(bathy[:, 1].min(), bathy[:, 1].max())
-
-    X, Y = np.meshgrid(x, y)
-
-    Z = interpolate.griddata(
-        bathy[:, :2], bathy[:, 2], (X, Y), method="nearest"
-    )
-
-    fix, ax = plt.subplots()
-    ax.pcolormesh(X, Y, Z)
-    ax.scatter(*artha, c="k")
-    ax.scatter(*buoy, c="k")
-
-    ax.axis("equal")
-    return ax
-
-
 D = np.diff(np.stack((artha, buoy)), axis=0)
-x = np.arange(-150, np.sqrt((D**2).sum()) + 150)
+x = np.arange(
+    -150,
+    np.sqrt((D**2).sum()) + 150,
+    config.getfloat("bathy", "step", fallback=1),
+)
 theta = np.angle(D.dot((1, 1j)))
 
 coords = artha + (x * np.stack((np.cos(theta), np.sin(theta)))).T
 
-z = interpolate.griddata(bathy[:,:2], bathy[:,2], coords)
+log.info("Interpolating bathymetry in 1D")
+z = interpolate.griddata(bathy[:, :2], bathy[:, 2], coords)
+log.debug(z)
 
-ax = display()
-ax.scatter(*coords.T, c="k", marker=".")
 
-fig_1d, ax_1d = plt.subplots()
-ax_1d.plot(x, z)
-plt.show(block=True)