diff --git a/.zenodo.json b/.zenodo.json
index 31ee705..3746d93 100644
--- a/.zenodo.json
+++ b/.zenodo.json
@@ -1,5 +1,5 @@
 {
-    "title": "Hyoga: a Python library to visualize ice-sheet model datasets",
+    "title": "Hyoga: paleoglacier modelling framework",
     "license": "GPL-3.0",
     "creators": [
         {
diff --git a/README.rst b/README.rst
index 582e451..fb07362 100644
--- a/README.rst
+++ b/README.rst
@@ -1,4 +1,4 @@
-.. Copyright (c) 2019-2022, Julien Seguinot (juseg.github.io)
+.. Copyright (c) 2019-2023, Julien Seguinot (juseg.github.io)
 .. GNU General Public License v3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
 
 Hyoga
@@ -15,7 +15,7 @@ Hyoga
 .. image:: https://zenodo.org/badge/227465038.svg
    :target: https://zenodo.org/badge/latestdoi/227465038
 
-Hyoga_ is a small Python_ library to visualize ice-sheet model datasets.
+Hyoga_ is a Python_ library to prepare and visualize ice-sheet model datasets.
 It acts as a thin wrapper around GeoPandas_ and xarray_ for CF_-compliant
 datasets on regular grids used for instance in PISM_. Hyoga (氷河) is the
 Japanese word for glacier (lit. ice river). See the documentation_ for more.
diff --git a/doc/conf.py b/doc/conf.py
index e7ef0d9..94feb99 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -1,4 +1,4 @@
-# Copyright (c) 2021, Julien Seguinot (juseg.github.io)
+# Copyright (c) 2021-2023, Julien Seguinot (juseg.github.io)
 # GNU General Public License v3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
 
 """Sphinx configuration file for hyoga documentation."""
@@ -11,10 +11,10 @@
 # -- Project information -----------------------------------------------------
 
 project = 'hyoga'
-copyright = '2021-2022'
+copyright = '2021-2023'
 author = 'Julien Seguinot'
-version = '0.2 Bale'
-release = '0.2.2'
+version = '0.3 Cocuy'
+release = '0.3.0'
 
 
 # -- General configuration ---------------------------------------------------
diff --git a/doc/index.rst b/doc/index.rst
index 2e61fb4..2bf8476 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -1,10 +1,10 @@
-.. Copyright (c) 2021-2022, Julien Seguinot (juseg.github.io)
+.. Copyright (c) 2021-2023, Julien Seguinot (juseg.github.io)
 .. GNU General Public License v3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
 
 Hyoga
 =====
 
-Hyoga is a small Python_ library to visualize ice-sheet model datasets.
+Hyoga is a Python_ library to prepare and visualize ice-sheet model datasets.
 It acts as a thin wrapper around GeoPandas_ and xarray_ for CF_-compliant
 datasets on regular grids used for instance in PISM_. Hyoga (氷河) is the
 Japanese word for glacier (lit. ice river).
diff --git a/doc/whatsnew.rst b/doc/whatsnew.rst
index cafb463..d702564 100644
--- a/doc/whatsnew.rst
+++ b/doc/whatsnew.rst
@@ -1,4 +1,4 @@
-.. Copyright (c) 2021-2022, Julien Seguinot (juseg.github.io)
+.. Copyright (c) 2021-2023, Julien Seguinot (juseg.github.io)
 .. GNU General Public License v3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
 
 .. currentmodule:: hyoga
@@ -23,8 +23,19 @@ What's new
 
 .. _v0.3.0:
 
-v0.3.0 (unreleased)
--------------------
+v0.3.0 Cocuy (16 Jan. 2023)
+---------------------------
+
+.. plot:: ../examples/whatsnew/plot_v003_cocuy.py
+   :include-source: false
+
+This release turns hyoga into more than just a visualization tool. Two
+functions were added to :doc:`open </datasets/opening>` online elevation data
+(GEBCO_) and monthly climatologies (CHELSA_) in custom projections that can be
+used as PISM_ input files for paleoglacier modelling about anywhere on Earth.
+Minor bugs were fixed. Code coverage decreased to 67 percent.
+
+.. _PISM: https://pism.io
 
 Breaking changes
 ~~~~~~~~~~~~~~~~
@@ -42,11 +53,14 @@ New features
 ~~~~~~~~~~~~
 
 - Add :func:`hyoga.open.bootstrap` to open global elevation data from either
-  GEBCO or CHELSA as bootstrapping data for PISM (:issue:`1`, :pull:`51`,
-  :issue:`54`, :pull:`55`, :issue:`57`, :pull:`60`, :pull:`62`, :pull:`64`).
-- Add :func:`hyoga.open.atmosphere` to open monthly climatologies from CHELSA
+  GEBCO_ or CHELSA_ as bootstrapping data for PISM (:issue:`1`, :pull:`51`,
+  :issue:`54`, :pull:`55`, :issue:`57`, :pull:`60`, :pull:`62`).
+- Add :func:`hyoga.open.atmosphere` to open monthly climatologies from CHELSA_
   as atmospheric data for PISM (:issue:`3`, :pull:`56`).
 
+.. _CHELSA: https://chelsa-climate.org
+.. _GEBCO: https://www.gebco.net
+
 Bug fixes
 ~~~~~~~~~
 
diff --git a/examples/whatsnew/plot_v002_bale.py b/examples/whatsnew/plot_v002_bale.py
index c3a46ee..9684782 100755
--- a/examples/whatsnew/plot_v002_bale.py
+++ b/examples/whatsnew/plot_v002_bale.py
@@ -1,5 +1,5 @@
 #!/usr/bin/env python
-# Copyright (c) 2022, Julien Seguinot (juseg.github.io)
+# Copyright (c) 2022-2023, Julien Seguinot (juseg.github.io)
 # GNU General Public License v3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
 
 """
@@ -13,9 +13,9 @@
 
 # plot paleoglaciers
 ax = hyoga.open.paleoglaciers().to_crs(epsg=3857).plot(
-    alpha=0.75, facecolor='w', edgecolor='r', linewidth=2)
+    alpha=0.75, facecolor='w', edgecolor='w', linewidth=2)
 
-# zoom on Bale Mountains (120x60 km)
+# zoom on Bale Mountains (80x60 km)
 ax.set_xlim(4390e3, 4470e3)
 ax.set_ylim(730e3, 790e3)
 
diff --git a/examples/whatsnew/plot_v003_cocuy.py b/examples/whatsnew/plot_v003_cocuy.py
new file mode 100755
index 0000000..d13a5a3
--- /dev/null
+++ b/examples/whatsnew/plot_v003_cocuy.py
@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+# Copyright (c) 2023, Julien Seguinot (juseg.github.io)
+# GNU General Public License v3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
+
+"""
+v0.3.0 Cantal
+=============
+"""
+
+import matplotlib.pyplot as plt
+import contextily as cx
+import hyoga
+
+# plot paleoglaciers
+ax = hyoga.open.paleoglaciers().to_crs(epsg=3857).plot(
+    alpha=0.75, facecolor='w', edgecolor='w', linewidth=2)
+
+# zoom on Cocuy (240x180 km)
+ax.set_xlim(-8200e3, -7960e3)
+ax.set_ylim(580e3, 760e3)
+
+# add stamen terrain
+cx.add_basemap(ax, source=cx.providers.Stamen.TerrainBackground)
+
+# set axes properties
+ax.set_title('Cocuy')
+ax.xaxis.set_visible(False)
+ax.yaxis.set_visible(False)
+
+# show
+plt.show()
diff --git a/setup.cfg b/setup.cfg
index a83fb3e..c749e33 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,4 +1,4 @@
-# Copyright (c) 2019-2021, Julien Seguinot (juseg.github.io)
+# Copyright (c) 2019-2023, Julien Seguinot (juseg.github.io)
 # GNU General Public License v3.0+ (https://www.gnu.org/licenses/gpl-3.0.txt)
 
 # Build config for hyoga
@@ -6,14 +6,14 @@
 [metadata]
 
 name = hyoga
-version = 0.2.2
+version = 0.3.0
 author = Julien Seguinot
-description = A Python library to visualize ice-sheet model datasets
+description = Paleoglacier modelling framework
 long_description = file: README.rst
 long_description_content_type = text/x-rst
 url = https://github.com/juseg/hyoga
 classifiers =
-    Development Status :: 2 - Pre-Alpha
+    Development Status :: 3 - Alpha
     Intended Audience :: Science/Research
     License :: OSI Approved :: GNU General Public License v3 or later (GPLv3+)
     Programming Language :: Python :: 3