Tutorials: sign NAIP download (#2343)

* Getting Started: fix NAIP download

* Import planetary_computer

* Help torchvision figure out filename

docs/tutorials/getting_started.ipynb

@@ -43,7 +43,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "%pip install torchgeo"
+    "%pip install torchgeo planetary_computer"
    ]
   },
   {
@@ -70,6 +70,7 @@
     "import os\n",
     "import tempfile\n",
     "\n",
+    "import planetary_computer\n",
     "from torch.utils.data import DataLoader\n",
     "\n",
     "from torchgeo.datasets import NAIP, ChesapeakeDE, stack_samples\n",
@@ -160,7 +161,8 @@
     "    'm_3807512_sw_18_060_20180815.tif',\n",
     "]\n",
     "for tile in tiles:\n",
-    "    download_url(naip_url + tile, naip_root)\n",
+    "    url = planetary_computer.sign(naip_url + tile)\n",
+    "    download_url(url, naip_root, filename=tile)\n",
     "\n",
     "naip = NAIP(naip_root)"
    ]