diff --git a/setup.py b/setup.py
index 9d81af3..87578af 100755
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ def read(*names, **kwargs):
 
 setup(
     name="satextractor",
-    version="0.2.0",
+    version="0.2.1",
     license="BSD-2-Clause",
     description="SatExtractor. Extract everything from everywhere.",
     url="https://github.com/FrontierDevelopmentLab/sat-extractor",
diff --git a/src/satextractor/models/constellation_info.py b/src/satextractor/models/constellation_info.py
index 272c267..a89b923 100644
--- a/src/satextractor/models/constellation_info.py
+++ b/src/satextractor/models/constellation_info.py
@@ -64,7 +64,7 @@
     "B6": {
         "band": Band.create(
             name="B6",
-            common_name="swir16",
+            common_name="swir1",
             center_wavelength=1.6,
             full_width_half_max=0.08,
         ),
@@ -73,7 +73,7 @@
     "B7": {
         "band": Band.create(
             name="B7",
-            common_name="swir22",
+            common_name="swir2",
             center_wavelength=2.2,
             full_width_half_max=0.2,
         ),
@@ -100,7 +100,7 @@
     "B10": {
         "band": Band.create(
             name="B10",
-            common_name="lwir11",
+            common_name="tirs1",
             center_wavelength=10.9,
             full_width_half_max=0.8,
         ),
@@ -109,7 +109,7 @@
     "B11": {
         "band": Band.create(
             name="B11",
-            common_name="lwir12",
+            common_name="tirs2",
             center_wavelength=12.0,
             full_width_half_max=1.0,
         ),
@@ -148,7 +148,7 @@
     "B4": {
         "band": Band.create(
             name="B4",
-            common_name="near infrared",
+            common_name="nir",
             center_wavelength=0.835,
             full_width_half_max=0.065,
         ),
@@ -157,7 +157,7 @@
     "B5": {
         "band": Band.create(
             name="B5",
-            common_name="shortwave infrared 1",
+            common_name="swir1",
             center_wavelength=1.65,
             full_width_half_max=0.10,
         ),
@@ -184,7 +184,7 @@
     "B7": {
         "band": Band.create(
             name="B7",
-            common_name="shortwave infrared 2",
+            common_name="swir2",
             center_wavelength=2.215,
             full_width_half_max=0.135,
         ),
@@ -193,7 +193,7 @@
     "B8": {
         "band": Band.create(
             name="B8",
-            common_name="panchromatic",
+            common_name="pan",
             center_wavelength=0.71,
             full_width_half_max=0.24,
         ),
@@ -232,7 +232,7 @@
     "B4": {
         "band": Band.create(
             name="B4",
-            common_name="near infrared",
+            common_name="nir",
             center_wavelength=0.835,
             full_width_half_max=0.065,
         ),
@@ -241,7 +241,7 @@
     "B5": {
         "band": Band.create(
             name="B5",
-            common_name="shortwave infrared 1",
+            common_name="swir1",
             center_wavelength=1.65,
             full_width_half_max=0.10,
         ),
@@ -259,7 +259,7 @@
     "B7": {
         "band": Band.create(
             name="B7",
-            common_name="shortwave infrared 2",
+            common_name="swir2",
             center_wavelength=2.215,
             full_width_half_max=0.135,
         ),
@@ -270,55 +270,107 @@
 
 SENTINEL2_BAND_INFO = {
     "B01": {
-        "band": Band.create(name="B01", common_name="coastal", center_wavelength=0.443),
+        "band": Band.create(
+            name="B01",
+            common_name="coastal",
+            center_wavelength=0.443,
+        ),
         "gsd": 60.0,
     },
     "B02": {
-        "band": Band.create(name="B02", common_name="blue", center_wavelength=0.490),
+        "band": Band.create(
+            name="B02",
+            common_name="blue",
+            center_wavelength=0.490,
+        ),
         "gsd": 10.0,
     },
     "B03": {
-        "band": Band.create(name="B03", common_name="green", center_wavelength=0.560),
+        "band": Band.create(
+            name="B03",
+            common_name="green",
+            center_wavelength=0.560,
+        ),
         "gsd": 10.0,
     },
     "B04": {
-        "band": Band.create(name="B04", common_name="red", center_wavelength=0.665),
+        "band": Band.create(
+            name="B04",
+            common_name="red",
+            center_wavelength=0.665,
+        ),
         "gsd": 10.0,
     },
     "B05": {
-        "band": Band.create(name="B05", common_name="rededge", center_wavelength=0.705),
+        "band": Band.create(
+            name="B05",
+            common_name="rededge1",
+            center_wavelength=0.705,
+        ),
         "gsd": 20.0,
     },
     "B06": {
-        "band": Band.create(name="B06", common_name="rededge", center_wavelength=0.740),
+        "band": Band.create(
+            name="B06",
+            common_name="rededge2",
+            center_wavelength=0.740,
+        ),
         "gsd": 20.0,
     },
     "B07": {
-        "band": Band.create(name="B07", common_name="rededge", center_wavelength=0.783),
+        "band": Band.create(
+            name="B07",
+            common_name="rededge3",
+            center_wavelength=0.783,
+        ),
         "gsd": 20.0,
     },
     "B08": {
-        "band": Band.create(name="B08", common_name="nir", center_wavelength=0.842),
+        "band": Band.create(
+            name="B08",
+            common_name="nir",
+            center_wavelength=0.842,
+        ),
         "gsd": 10.0,
     },
     "B8A": {
-        "band": Band.create(name="B8A", common_name="nir08", center_wavelength=0.865),
+        "band": Band.create(
+            name="B8A",
+            common_name="nir08",
+            center_wavelength=0.865,
+        ),
         "gsd": 20.0,
     },
     "B09": {
-        "band": Band.create(name="B09", common_name="nir09", center_wavelength=0.945),
+        "band": Band.create(
+            name="B09",
+            common_name="nir09",
+            center_wavelength=0.945,
+        ),
         "gsd": 60.0,
     },
     "B10": {
-        "band": Band.create(name="B10", common_name="cirrus", center_wavelength=1.375),
+        "band": Band.create(
+            name="B10",
+            common_name="cirrus",
+            center_wavelength=1.375,
+        ),
         "gsd": 60.0,
     },
     "B11": {
-        "band": Band.create(name="B11", common_name="swir16", center_wavelength=1.610),
+        "band": Band.create(
+            name="B11",
+            common_name="swir1",
+            center_wavelength=1.610,
+        ),
         "gsd": 20.0,
     },
     "B12": {
-        "band": Band.create(name="B12", common_name="swir22", center_wavelength=2.190),
+        "band": Band.create(
+            name="B12",
+            common_name="swir2",
+            center_wavelength=2.190,
+        ),
         "gsd": 20.0,
     },
 }
diff --git a/src/satextractor/models/models.py b/src/satextractor/models/models.py
index 16dc100..774e52a 100644
--- a/src/satextractor/models/models.py
+++ b/src/satextractor/models/models.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import datetime
 from typing import List
 from typing import Tuple
@@ -9,18 +11,51 @@
 
 @attr.s
 class Tile:
-    id: str = attr.ib()
+    zone: int = attr.ib()
+    row: str = attr.ib()
+    min_x: int = attr.ib()
+    min_y: int = attr.ib()
+    max_x: int = attr.ib()
+    max_y: int = attr.ib()
     epsg: str = attr.ib()
-    bbox: Tuple[float, float, float, float] = attr.ib()  # (xmin, ymin, xmax, ymax)
 
-    def __attrs_post_init__(self):
-        self.bbox_size = (
-            self.bbox[2] - self.bbox[0],
-            self.bbox[3] - self.bbox[1],
+    @property
+    def id(self) -> str:
+        return f"{self.zone}_{self.row}_{self.bbox_size_x}_{self.xloc}_{self.yloc}"
+
+    @property
+    def xloc(self) -> int:
+        return int(self.min_x / self.bbox_size_x)
+
+    @property
+    def yloc(self) -> int:
+        return int(self.min_y / self.bbox_size_y)
+
+    @property
+    def bbox(self) -> Tuple[float, float, float, float]:
+        return (self.min_x, self.min_y, self.max_x, self.max_y)
+
+    @property
+    def bbox_wgs84(self):
+        reproj_src_wgs = get_transform_function(str(self.epsg), "WGS84")
+        return (
+            *reproj_src_wgs(self.min_x, self.min_y),
+            *reproj_src_wgs(self.max_x, self.max_y),
         )
 
-    def contains(self, other):
-        # type: (Tile)->bool
+    @property
+    def bbox_size_x(self) -> int:  # in metres
+        return int(self.max_x - self.min_x)
+
+    @property
+    def bbox_size_y(self) -> int:  # in metres
+        return int(self.max_y - self.min_y)
+
+    @property
+    def bbox_size(self) -> Tuple[int, int]:  # in metres
+        return (self.bbox_size_x, self.bbox_size_y)
+
+    def contains(self, other: Tile) -> bool:
         return (
             self.epsg == other.epsg
             and self.bbox[0] <= other.bbox[0]
@@ -29,14 +64,6 @@ def contains(self, other):
             and self.bbox[3] >= other.bbox[3]
         )
 
-    @property
-    def bbox_wgs84(self):
-        reproj_src_wgs = get_transform_function(str(self.epsg), "WGS84")
-        return (
-            *reproj_src_wgs(self.bbox[0], self.bbox[1]),
-            *reproj_src_wgs(self.bbox[2], self.bbox[3]),
-        )
-
 
 @attr.s
 class ExtractionTask:
diff --git a/src/satextractor/preparer/preparer.py b/src/satextractor/preparer/preparer.py
index 1a34f78..ac82b5b 100644
--- a/src/satextractor/preparer/preparer.py
+++ b/src/satextractor/preparer/preparer.py
@@ -32,24 +32,6 @@ def create_zarr_patch_structure(
             dtype=np.uint16,
         )
 
-        mask_path = f"{patch_constellation_path}/mask"
-        zarr.open_array(
-            fs_mapper(mask_path),
-            "w",
-            shape=(len(sensing_times), len(bands)),
-            chunks=(1, 1),
-            dtype=np.uint8,
-        )
-
-        percentiles_path = f"{patch_constellation_path}/percentiles_0to100_5incr"
-        zarr.open_array(
-            fs_mapper(percentiles_path),
-            "w",
-            shape=(len(sensing_times), len(bands), 21),
-            chunks=(1, 1, 21),
-            dtype=np.float32,
-        )
-
         # Create timestamps array
         timestamps_path = f"{patch_constellation_path}/timestamps"
         z_dates = zarr.open_array(
diff --git a/src/satextractor/tiler/tiler.py b/src/satextractor/tiler/tiler.py
index e26a75e..c02d8da 100644
--- a/src/satextractor/tiler/tiler.py
+++ b/src/satextractor/tiler/tiler.py
@@ -27,18 +27,17 @@ def split_region_in_utm_tiles(
     crs_bboxes = utm_splitter.get_bbox_list()
     info_bboxes = utm_splitter.get_info_list()
 
-    tiles = []
-    for info, box in zip(info_bboxes, crs_bboxes):
-        # tile ids are globally unique and take the format shown below
-        zone = info["utm_zone"]
-        row = info["utm_row"]
-        x, y = (int(v / bbox_size) for v in box.lower_left)
-        tiles.append(
-            Tile(
-                id=f"{zone}_{row}_{bbox_size}_{x}_{y}",
-                epsg=box.crs.epsg,
-                bbox=(box.min_x, box.min_y, box.max_x, box.max_y),
-            ),
+    tiles = [
+        Tile(
+            zone=info["utm_zone"],
+            row=info["utm_row"],
+            min_x=box.min_x,
+            min_y=box.min_y,
+            max_x=box.max_x,
+            max_y=box.max_y,
+            epsg=box.crs.epsg,
         )
+        for info, box in zip(info_bboxes, crs_bboxes)
+    ]
 
     return tiles