diff --git a/data/config.ini b/data/config.ini
index d8da6b7..4a6214a 100644
--- a/data/config.ini
+++ b/data/config.ini
@@ -1,9 +1,13 @@
-[bathy]
-inp=data/Database_20220224.xyz
-hires=data/bathyhires.dat
+[inp]
+root=data
+base=Database_20220224.xyz
+hires=bathyhires.dat
 hires_step=0.5
-sub=out/bathy_sub.npy
-out=out/bathy.npy
+
+[out]
+root=out
+sub=bathy_sub.npy
+out=bathy.npy
 step=1
 
 [artha]
diff --git a/data/processing/projection.py b/data/processing/projection.py
index ae62196..c0de89e 100644
--- a/data/processing/projection.py
+++ b/data/processing/projection.py
@@ -20,9 +20,11 @@ log.info("Starting bathymetry pre-processing")
 config = configparser.ConfigParser()
 config.read("config.ini")
 
-bathy_inp = pathlib.Path(config.get("bathy", "sub"))
-hires_inp = pathlib.Path(config.get("bathy", "hires"))
-bathy_out = pathlib.Path(config.get("bathy", "out"))
+inp_root = pathlib.Path(config.get("inp", "root"))
+out_root = pathlib.Path(config.get("out", "root"))
+bathy_inp = out_root.joinpath(config.get("out", "sub"))
+hires_inp = inp_root.joinpath(config.get("inp", "hires"))
+bathy_out = inp_root.joinpath(config.get("out", "out"))
 
 log.info(f"Loading bathymetry from {bathy_inp}")
 bathy_curvi = np.load(bathy_inp)
@@ -51,7 +53,7 @@ D = np.diff(np.stack((artha, buoy)), axis=0)
 x = np.arange(
     -150,
     np.sqrt((D**2).sum()) + 150,
-    config.getfloat("bathy", "step", fallback=1),
+    config.getfloat("out", "step", fallback=1),
 )
 theta = np.angle(D.dot((1, 1j)))
 
@@ -66,7 +68,7 @@ bathy_hires = np.stack(
     (
         np.linspace(
             0,
-            (_hires.size - 1) * config.getfloat("bathy", "hires_step"),
+            (_hires.size - 1) * config.getfloat("inp", "hires_step"),
             _hires.size,
         ),
         _hires,
@@ -96,3 +98,5 @@ z[flt_x] = interpolate.griddata(
     bathy_hires[:, 1],
     (x[flt_x] - x[z_crossing] + bathy_hires[hires_crossing, 0]),
 )
+
+
diff --git a/data/processing/subdomain.py b/data/processing/subdomain.py
index 88c3d96..73f62bd 100644
--- a/data/processing/subdomain.py
+++ b/data/processing/subdomain.py
@@ -33,8 +33,10 @@ domain[0] -= 0.002
 domain[1] += 0.002
 log.debug(f"domain: {domain}")
 
-bathy_inp = pathlib.Path(config.get("bathy", "inp"))
-bathy_out = pathlib.Path(config.get("bathy", "sub"))
+inp_root = pathlib.Path(config.get("inp", "root"))
+out_root = pathlib.Path(config.get("out", "root"))
+bathy_inp = inp_root.joinpath(config.get("inp", "base"))
+bathy_out = out_root.joinpath(config.get("out", "sub"))
 log.info(f"Reading bathymetry from '{bathy_inp}'")
 raw_bathy = np.genfromtxt(bathy_inp)
 log.debug(f"Initial size: {raw_bathy.shape}")