From e8ce76d01cb33613061c834b7b4279ee1b73586c Mon Sep 17 00:00:00 2001
From: Paul van Genuchten <genuchten@yahoo.com>
Date: Tue, 23 Jun 2026 16:13:43 +0200
Subject: [PATCH 1/3] add a zarr sample + vsizip

---
 workshop/jupyter/content/data/README.md       |   2 ++
 .../content/data/sample_geozarr.zarr.zip      | Bin 0 -> 6009 bytes
 .../content/notebooks/05-raster-data.ipynb    |  21 ++++++++++++++++++
 workshop/jupyter/requirements.txt             |   1 +
 4 files changed, 24 insertions(+)
 create mode 100644 workshop/jupyter/content/data/sample_geozarr.zarr.zip

diff --git a/workshop/jupyter/content/data/README.md b/workshop/jupyter/content/data/README.md
index d61dc6e..8a45254 100644
--- a/workshop/jupyter/content/data/README.md
+++ b/workshop/jupyter/content/data/README.md
@@ -16,3 +16,5 @@ and sometimes also GeoJSON.
 
 NB "Antarctica" has been removed from the "countries" datasets as it gave
 problems with reprojections...
+
+Sample_geozarr has been produced in the scope of this training using numpy with random numbers. 
\ No newline at end of file
diff --git a/workshop/jupyter/content/data/sample_geozarr.zarr.zip b/workshop/jupyter/content/data/sample_geozarr.zarr.zip
new file mode 100644
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diff --git a/workshop/jupyter/content/notebooks/05-raster-data.ipynb b/workshop/jupyter/content/notebooks/05-raster-data.ipynb
index 345cb70..5e6c312 100644
--- a/workshop/jupyter/content/notebooks/05-raster-data.ipynb
+++ b/workshop/jupyter/content/notebooks/05-raster-data.ipynb
@@ -123,6 +123,27 @@
     "\n"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "GDAL supports a wide variety of input format, and can also combine it with virtual filesystems, such as within a zipfile"
+    ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from osgeo import gdal\n",
+    "import matplotlib.pyplot as plt\n",
+    "# Notice how the zarr file is referenced within the zip file\n",
+    "raster_path = '/vsizip/../data/sample_geozarr.zarr.zip/sample_geozarr.zarr'\n",
+    "dataset = gdal.Open(raster_path)\n",
+    "r = plt.imshow(ds.GetRasterBand(1).ReadAsArray())\n"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
diff --git a/workshop/jupyter/requirements.txt b/workshop/jupyter/requirements.txt
index 00c1dbd..1f3ffbc 100644
--- a/workshop/jupyter/requirements.txt
+++ b/workshop/jupyter/requirements.txt
@@ -13,3 +13,4 @@ pygeometa # >0.7 removed by Just
 matplotlib
 fiona
 rasterio
+

From 488cbc678cc6b3ab77c69288a0d2f25d20fc5ba6 Mon Sep 17 00:00:00 2001
From: Tom Kralidis <tomkralidis@gmail.com>
Date: Tue, 23 Jun 2026 18:36:21 -0400
Subject: [PATCH 2/3] Update requirements.txt

---
 workshop/jupyter/requirements.txt | 1 -
 1 file changed, 1 deletion(-)

diff --git a/workshop/jupyter/requirements.txt b/workshop/jupyter/requirements.txt
index 1f3ffbc..00c1dbd 100644
--- a/workshop/jupyter/requirements.txt
+++ b/workshop/jupyter/requirements.txt
@@ -13,4 +13,3 @@ pygeometa # >0.7 removed by Just
 matplotlib
 fiona
 rasterio
-

From a3e83695a5a00b9d928c3d900570a786b27c072c Mon Sep 17 00:00:00 2001
From: Tom Kralidis <tomkralidis@gmail.com>
Date: Tue, 23 Jun 2026 18:37:17 -0400
Subject: [PATCH 3/3] Update README.md

---
 workshop/jupyter/content/data/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/workshop/jupyter/content/data/README.md b/workshop/jupyter/content/data/README.md
index 8a45254..0521511 100644
--- a/workshop/jupyter/content/data/README.md
+++ b/workshop/jupyter/content/data/README.md
@@ -17,4 +17,4 @@ and sometimes also GeoJSON.
 NB "Antarctica" has been removed from the "countries" datasets as it gave
 problems with reprojections...
 
-Sample_geozarr has been produced in the scope of this training using numpy with random numbers. 
\ No newline at end of file
+`sample_geozarr.zarr.zip` has been produced in the scope of this training using numpy with random numbers.