diff --git a/README.md b/README.md
index 439c8b2..062417a 100644
--- a/README.md
+++ b/README.md
@@ -103,16 +103,6 @@ df = pd.DataFrame(results)
 df
 ```
 
-Display a scatter plot of the data.
-
-``` python
-alt.Chart(df).mark_circle(size=60).encode(
-    x='area_km2',
-    y='mean_elev',
-    tooltip=['country']
-).interactive()
-```
-
 # Shut down the cluster
 
 ``` python
diff --git a/index.ipynb b/index.ipynb
index 40f944e..027732f 100644
--- a/index.ipynb
+++ b/index.ipynb
@@ -121,94 +121,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "application/vnd.jupyter.widget-view+json": {
-       "model_id": "c4d1ed41c91d40ec94ef5ee1bec441c5",
-       "version_major": 2,
-       "version_minor": 0
-      },
-      "text/plain": [
-       "Output()"
-      ]
-     },
-     "metadata": {},
-     "output_type": "display_data"
-    },
-    {
-     "data": {
-      "text/html": [
-       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"></pre>\n"
-      ],
-      "text/plain": []
-     },
-     "metadata": {},
-     "output_type": "display_data"
-    },
-    {
-     "data": {
-      "text/html": [
-       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\">╭──────────────────────────────── <span style=\"color: #008000; text-decoration-color: #008000; font-weight: bold\">Package Info</span> ────────────────────────────────╮\n",
-       "│                                 ╷                                            │\n",
-       "│  <span style=\"font-weight: bold\"> Package                       </span>│<span style=\"font-weight: bold\"> Note                                     </span>  │\n",
-       "│ ╶───────────────────────────────┼──────────────────────────────────────────╴ │\n",
-       "│   coiled_local_earthengine_dask │ Source wheel built from                    │\n",
-       "│                                 │ ~/Documents/GitHub/VorGeo/earthengine-da   │\n",
-       "│                                 │ sk                                         │\n",
-       "│                                 ╵                                            │\n",
-       "╰──────────────────────────────────────────────────────────────────────────────╯\n",
-       "</pre>\n"
-      ],
-      "text/plain": [
-       "╭──────────────────────────────── \u001b[1;32mPackage Info\u001b[0m ────────────────────────────────╮\n",
-       "│                                 ╷                                            │\n",
-       "│  \u001b[1m \u001b[0m\u001b[1mPackage                      \u001b[0m\u001b[1m \u001b[0m│\u001b[1m \u001b[0m\u001b[1mNote                                    \u001b[0m\u001b[1m \u001b[0m  │\n",
-       "│ ╶───────────────────────────────┼──────────────────────────────────────────╴ │\n",
-       "│   coiled_local_earthengine_dask │ Source wheel built from                    │\n",
-       "│                                 │ ~/Documents/GitHub/VorGeo/earthengine-da   │\n",
-       "│                                 │ sk                                         │\n",
-       "│                                 ╵                                            │\n",
-       "╰──────────────────────────────────────────────────────────────────────────────╯\n"
-      ]
-     },
-     "metadata": {},
-     "output_type": "display_data"
-    },
-    {
-     "data": {
-      "application/vnd.jupyter.widget-view+json": {
-       "model_id": "6418110aceaa431f885b7e3c7e150ca9",
-       "version_major": 2,
-       "version_minor": 0
-      },
-      "text/plain": [
-       "Output()"
-      ]
-     },
-     "metadata": {},
-     "output_type": "display_data"
-    },
-    {
-     "data": {
-      "text/html": [
-       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"></pre>\n"
-      ],
-      "text/plain": []
-     },
-     "metadata": {},
-     "output_type": "display_data"
-    },
-    {
-     "name": "stdout",
-     "output_type": "stream",
-     "text": [
-      "Google Application Default Credentials have been written to a file on your Coiled VM(s).\n",
-      "These credentials will potentially be valid until explicitly revoked by running\n",
-      "gcloud auth application-default revoke\n"
-     ]
-    }
-   ],
+   "outputs": [],
    "source": [
     "cluster = ClusterGEE(\n",
     "    name='test-class-cluster',\n",
@@ -229,224 +142,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/html": [
-       "<div>\n",
-       "    <div style=\"width: 24px; height: 24px; background-color: #e1e1e1; border: 3px solid #9D9D9D; border-radius: 5px; position: absolute;\"> </div>\n",
-       "    <div style=\"margin-left: 48px;\">\n",
-       "        <h3 style=\"margin-bottom: 0px;\">Client</h3>\n",
-       "        <p style=\"color: #9D9D9D; margin-bottom: 0px;\">Client-7bea3022-1a14-11ef-9d7a-fe11494405b6</p>\n",
-       "        <table style=\"width: 100%; text-align: left;\">\n",
-       "\n",
-       "        <tr>\n",
-       "        \n",
-       "            <td style=\"text-align: left;\"><strong>Connection method:</strong> Cluster object</td>\n",
-       "            <td style=\"text-align: left;\"><strong>Cluster type:</strong> earthengine_dask.ClusterGEE</td>\n",
-       "        \n",
-       "        </tr>\n",
-       "\n",
-       "        \n",
-       "            <tr>\n",
-       "                <td style=\"text-align: left;\">\n",
-       "                    <strong>Dashboard: </strong> <a href=\"https://cluster-ddzeu.dask.host/bO1FM3wYgk4MnSTm/status\" target=\"_blank\">https://cluster-ddzeu.dask.host/bO1FM3wYgk4MnSTm/status</a>\n",
-       "                </td>\n",
-       "                <td style=\"text-align: left;\"></td>\n",
-       "            </tr>\n",
-       "        \n",
-       "\n",
-       "        </table>\n",
-       "\n",
-       "        \n",
-       "\n",
-       "        \n",
-       "            <details>\n",
-       "            <summary style=\"margin-bottom: 20px;\"><h3 style=\"display: inline;\">Cluster Info</h3></summary>\n",
-       "            <div class=\"jp-RenderedHTMLCommon jp-RenderedHTML jp-mod-trusted jp-OutputArea-output\">\n",
-       "    <div style=\"width: 24px; height: 24px; background-color: #e1e1e1; border: 3px solid #9D9D9D; border-radius: 5px; position: absolute;\">\n",
-       "    </div>\n",
-       "    <div style=\"margin-left: 48px;\">\n",
-       "        <h3 style=\"margin-bottom: 0px; margin-top: 0px;\">ClusterGEE</h3>\n",
-       "        <p style=\"color: #9D9D9D; margin-bottom: 0px;\">test-class-cluster</p>\n",
-       "        <table style=\"width: 100%; text-align: left;\">\n",
-       "            <tr>\n",
-       "                <td style=\"text-align: left;\">\n",
-       "                    <strong>Dashboard:</strong> <a href=\"https://cluster-ddzeu.dask.host/bO1FM3wYgk4MnSTm/status\" target=\"_blank\">https://cluster-ddzeu.dask.host/bO1FM3wYgk4MnSTm/status</a>\n",
-       "                </td>\n",
-       "                <td style=\"text-align: left;\">\n",
-       "                    <strong>Workers:</strong> 2\n",
-       "                </td>\n",
-       "            </tr>\n",
-       "            <tr>\n",
-       "                <td style=\"text-align: left;\">\n",
-       "                    <strong>Total threads:</strong> 16\n",
-       "                </td>\n",
-       "                <td style=\"text-align: left;\">\n",
-       "                    <strong>Total memory:</strong> 61.18 GiB\n",
-       "                </td>\n",
-       "            </tr>\n",
-       "            \n",
-       "        </table>\n",
-       "\n",
-       "        <details>\n",
-       "            <summary style=\"margin-bottom: 20px;\">\n",
-       "                <h3 style=\"display: inline;\">Scheduler Info</h3>\n",
-       "            </summary>\n",
-       "\n",
-       "            <div style=\"\">\n",
-       "    <div>\n",
-       "        <div style=\"width: 24px; height: 24px; background-color: #FFF7E5; border: 3px solid #FF6132; border-radius: 5px; position: absolute;\"> </div>\n",
-       "        <div style=\"margin-left: 48px;\">\n",
-       "            <h3 style=\"margin-bottom: 0px;\">Scheduler</h3>\n",
-       "            <p style=\"color: #9D9D9D; margin-bottom: 0px;\">Scheduler-a29eebd5-7018-433a-a49a-669252201ecf</p>\n",
-       "            <table style=\"width: 100%; text-align: left;\">\n",
-       "                <tr>\n",
-       "                    <td style=\"text-align: left;\">\n",
-       "                        <strong>Comm:</strong> tls://10.2.0.16:8786\n",
-       "                    </td>\n",
-       "                    <td style=\"text-align: left;\">\n",
-       "                        <strong>Workers:</strong> 2\n",
-       "                    </td>\n",
-       "                </tr>\n",
-       "                <tr>\n",
-       "                    <td style=\"text-align: left;\">\n",
-       "                        <strong>Dashboard:</strong> <a href=\"http://10.2.0.16:8787/status\" target=\"_blank\">http://10.2.0.16:8787/status</a>\n",
-       "                    </td>\n",
-       "                    <td style=\"text-align: left;\">\n",
-       "                        <strong>Total threads:</strong> 16\n",
-       "                    </td>\n",
-       "                </tr>\n",
-       "                <tr>\n",
-       "                    <td style=\"text-align: left;\">\n",
-       "                        <strong>Started:</strong> Just now\n",
-       "                    </td>\n",
-       "                    <td style=\"text-align: left;\">\n",
-       "                        <strong>Total memory:</strong> 61.18 GiB\n",
-       "                    </td>\n",
-       "                </tr>\n",
-       "            </table>\n",
-       "        </div>\n",
-       "    </div>\n",
-       "\n",
-       "    <details style=\"margin-left: 48px;\">\n",
-       "        <summary style=\"margin-bottom: 20px;\">\n",
-       "            <h3 style=\"display: inline;\">Workers</h3>\n",
-       "        </summary>\n",
-       "\n",
-       "        \n",
-       "        <div style=\"margin-bottom: 20px;\">\n",
-       "            <div style=\"width: 24px; height: 24px; background-color: #DBF5FF; border: 3px solid #4CC9FF; border-radius: 5px; position: absolute;\"> </div>\n",
-       "            <div style=\"margin-left: 48px;\">\n",
-       "            <details>\n",
-       "                <summary>\n",
-       "                    <h4 style=\"margin-bottom: 0px; display: inline;\">Worker: test-class-cluster-worker-a5409605fd</h4>\n",
-       "                </summary>\n",
-       "                <table style=\"width: 100%; text-align: left;\">\n",
-       "                    <tr>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Comm: </strong> tls://10.2.0.14:33295\n",
-       "                        </td>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Total threads: </strong> 8\n",
-       "                        </td>\n",
-       "                    </tr>\n",
-       "                    <tr>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Dashboard: </strong> <a href=\"http://10.2.0.14:8787/status\" target=\"_blank\">http://10.2.0.14:8787/status</a>\n",
-       "                        </td>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Memory: </strong> 30.60 GiB\n",
-       "                        </td>\n",
-       "                    </tr>\n",
-       "                    <tr>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Nanny: </strong> tls://10.2.0.14:45263\n",
-       "                        </td>\n",
-       "                        <td style=\"text-align: left;\"></td>\n",
-       "                    </tr>\n",
-       "                    <tr>\n",
-       "                        <td colspan=\"2\" style=\"text-align: left;\">\n",
-       "                            <strong>Local directory: </strong> /scratch/dask-scratch-space/worker-ng4w71pn\n",
-       "                        </td>\n",
-       "                    </tr>\n",
-       "\n",
-       "                    \n",
-       "\n",
-       "                    \n",
-       "\n",
-       "                </table>\n",
-       "            </details>\n",
-       "            </div>\n",
-       "        </div>\n",
-       "        \n",
-       "        <div style=\"margin-bottom: 20px;\">\n",
-       "            <div style=\"width: 24px; height: 24px; background-color: #DBF5FF; border: 3px solid #4CC9FF; border-radius: 5px; position: absolute;\"> </div>\n",
-       "            <div style=\"margin-left: 48px;\">\n",
-       "            <details>\n",
-       "                <summary>\n",
-       "                    <h4 style=\"margin-bottom: 0px; display: inline;\">Worker: test-class-cluster-worker-aad98fb41d</h4>\n",
-       "                </summary>\n",
-       "                <table style=\"width: 100%; text-align: left;\">\n",
-       "                    <tr>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Comm: </strong> tls://10.2.0.15:43029\n",
-       "                        </td>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Total threads: </strong> 8\n",
-       "                        </td>\n",
-       "                    </tr>\n",
-       "                    <tr>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Dashboard: </strong> <a href=\"http://10.2.0.15:8787/status\" target=\"_blank\">http://10.2.0.15:8787/status</a>\n",
-       "                        </td>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Memory: </strong> 30.58 GiB\n",
-       "                        </td>\n",
-       "                    </tr>\n",
-       "                    <tr>\n",
-       "                        <td style=\"text-align: left;\">\n",
-       "                            <strong>Nanny: </strong> tls://10.2.0.15:36937\n",
-       "                        </td>\n",
-       "                        <td style=\"text-align: left;\"></td>\n",
-       "                    </tr>\n",
-       "                    <tr>\n",
-       "                        <td colspan=\"2\" style=\"text-align: left;\">\n",
-       "                            <strong>Local directory: </strong> /scratch/dask-scratch-space/worker-bcvdwwrg\n",
-       "                        </td>\n",
-       "                    </tr>\n",
-       "\n",
-       "                    \n",
-       "\n",
-       "                    \n",
-       "\n",
-       "                </table>\n",
-       "            </details>\n",
-       "            </div>\n",
-       "        </div>\n",
-       "        \n",
-       "\n",
-       "    </details>\n",
-       "</div>\n",
-       "\n",
-       "        </details>\n",
-       "    </div>\n",
-       "</div>\n",
-       "            </details>\n",
-       "        \n",
-       "\n",
-       "    </div>\n",
-       "</div>"
-      ],
-      "text/plain": [
-       "<Client: 'tls://10.2.0.16:8786' processes=2 threads=16, memory=61.18 GiB>"
-      ]
-     },
-     "execution_count": null,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "client = cluster.get_client()\n",
     "client"
@@ -469,127 +165,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {},
-   "outputs": [
-    {
-     "data": {
-      "text/html": [
-       "<div>\n",
-       "<style scoped>\n",
-       "    .dataframe tbody tr th:only-of-type {\n",
-       "        vertical-align: middle;\n",
-       "    }\n",
-       "\n",
-       "    .dataframe tbody tr th {\n",
-       "        vertical-align: top;\n",
-       "    }\n",
-       "\n",
-       "    .dataframe thead th {\n",
-       "        text-align: right;\n",
-       "    }\n",
-       "</style>\n",
-       "<table border=\"1\" class=\"dataframe\">\n",
-       "  <thead>\n",
-       "    <tr style=\"text-align: right;\">\n",
-       "      <th></th>\n",
-       "      <th>country</th>\n",
-       "      <th>area_km2</th>\n",
-       "      <th>mean_elev</th>\n",
-       "    </tr>\n",
-       "  </thead>\n",
-       "  <tbody>\n",
-       "    <tr>\n",
-       "      <th>0</th>\n",
-       "      <td>Abyei Area</td>\n",
-       "      <td>10460</td>\n",
-       "      <td>402.592190</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>1</th>\n",
-       "      <td>Afghanistan</td>\n",
-       "      <td>642093</td>\n",
-       "      <td>1809.717311</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>2</th>\n",
-       "      <td>Akrotiri</td>\n",
-       "      <td>127</td>\n",
-       "      <td>60.796081</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>3</th>\n",
-       "      <td>Aksai Chin</td>\n",
-       "      <td>30448</td>\n",
-       "      <td>5324.949965</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>4</th>\n",
-       "      <td>Albania</td>\n",
-       "      <td>28638</td>\n",
-       "      <td>689.740847</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>...</th>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "      <td>...</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>279</th>\n",
-       "      <td>West Bank</td>\n",
-       "      <td>5813</td>\n",
-       "      <td>341.715816</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>280</th>\n",
-       "      <td>Western Sahara</td>\n",
-       "      <td>269689</td>\n",
-       "      <td>253.175100</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>281</th>\n",
-       "      <td>Yemen</td>\n",
-       "      <td>454682</td>\n",
-       "      <td>932.051351</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>282</th>\n",
-       "      <td>Zambia</td>\n",
-       "      <td>754032</td>\n",
-       "      <td>1118.995950</td>\n",
-       "    </tr>\n",
-       "    <tr>\n",
-       "      <th>283</th>\n",
-       "      <td>Zimbabwe</td>\n",
-       "      <td>391916</td>\n",
-       "      <td>973.295555</td>\n",
-       "    </tr>\n",
-       "  </tbody>\n",
-       "</table>\n",
-       "<p>284 rows × 3 columns</p>\n",
-       "</div>"
-      ],
-      "text/plain": [
-       "            country  area_km2    mean_elev\n",
-       "0        Abyei Area     10460   402.592190\n",
-       "1       Afghanistan    642093  1809.717311\n",
-       "2          Akrotiri       127    60.796081\n",
-       "3        Aksai Chin     30448  5324.949965\n",
-       "4           Albania     28638   689.740847\n",
-       "..              ...       ...          ...\n",
-       "279       West Bank      5813   341.715816\n",
-       "280  Western Sahara    269689   253.175100\n",
-       "281           Yemen    454682   932.051351\n",
-       "282          Zambia    754032  1118.995950\n",
-       "283        Zimbabwe    391916   973.295555\n",
-       "\n",
-       "[284 rows x 3 columns]"
-      ]
-     },
-     "execution_count": null,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
+   "outputs": [],
    "source": [
     "# Get a list of countries to analyze.\n",
     "country_fc = ee.FeatureCollection('USDOS/LSIB_SIMPLE/2017')\n",
@@ -620,105 +196,6 @@
     "df"
    ]
   },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "Display a scatter plot of the data."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [
-    {
-     "data": {
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-       "      \"vega-lite\": \"https://cdn.jsdelivr.net/npm/vega-lite@5.17.0?noext\",\n",
-       "      \"vega-embed\": \"https://cdn.jsdelivr.net/npm/vega-embed@6?noext\",\n",
-       "    };\n",
-       "\n",
-       "    function maybeLoadScript(lib, version) {\n",
-       "      var key = `${lib.replace(\"-\", \"\")}_version`;\n",
-       "      return (VEGA_DEBUG[key] == version) ?\n",
-       "        Promise.resolve(paths[lib]) :\n",
-       "        new Promise(function(resolve, reject) {\n",
-       "          var s = document.createElement('script');\n",
-       "          document.getElementsByTagName(\"head\")[0].appendChild(s);\n",
-       "          s.async = true;\n",
-       "          s.onload = () => {\n",
-       "            VEGA_DEBUG[key] = version;\n",
-       "            return resolve(paths[lib]);\n",
-       "          };\n",
-       "          s.onerror = () => reject(`Error loading script: ${paths[lib]}`);\n",
-       "          s.src = paths[lib];\n",
-       "        });\n",
-       "    }\n",
-       "\n",
-       "    function showError(err) {\n",
-       "      outputDiv.innerHTML = `<div class=\"error\" style=\"color:red;\">${err}</div>`;\n",
-       "      throw err;\n",
-       "    }\n",
-       "\n",
-       "    function displayChart(vegaEmbed) {\n",
-       "      vegaEmbed(outputDiv, spec, embedOpt)\n",
-       "        .catch(err => showError(`Javascript Error: ${err.message}<br>This usually means there's a typo in your chart specification. See the javascript console for the full traceback.`));\n",
-       "    }\n",
-       "\n",
-       "    if(typeof define === \"function\" && define.amd) {\n",
-       "      requirejs.config({paths});\n",
-       "      require([\"vega-embed\"], displayChart, err => showError(`Error loading script: ${err.message}`));\n",
-       "    } else {\n",
-       "      maybeLoadScript(\"vega\", \"5\")\n",
-       "        .then(() => maybeLoadScript(\"vega-lite\", \"5.17.0\"))\n",
-       "        .then(() => maybeLoadScript(\"vega-embed\", \"6\"))\n",
-       "        .catch(showError)\n",
-       "        .then(() => displayChart(vegaEmbed));\n",
-       "    }\n",
-       "  })({\"config\": {\"view\": {\"continuousWidth\": 300, \"continuousHeight\": 300}}, \"data\": {\"name\": \"data-f99205faebf98d8f0e526d400e9850d3\"}, \"mark\": {\"type\": \"circle\", \"size\": 60}, \"encoding\": {\"tooltip\": [{\"field\": \"country\", \"type\": \"nominal\"}], \"x\": {\"field\": \"area_km2\", \"type\": \"quantitative\"}, \"y\": {\"field\": \"mean_elev\", \"type\": \"quantitative\"}}, \"params\": [{\"name\": \"param_1\", \"select\": {\"type\": \"interval\", \"encodings\": [\"x\", \"y\"]}, \"bind\": \"scales\"}], \"$schema\": \"https://vega.github.io/schema/vega-lite/v5.17.0.json\", \"datasets\": {\"data-f99205faebf98d8f0e526d400e9850d3\": [{\"country\": \"Abyei Area\", \"area_km2\": 10460, \"mean_elev\": 402.5921903247955}, {\"country\": \"Afghanistan\", \"area_km2\": 642093, \"mean_elev\": 1809.7173111215334}, {\"country\": \"Akrotiri\", \"area_km2\": 127, \"mean_elev\": 60.796080975396805}, {\"country\": \"Aksai Chin\", \"area_km2\": 30448, \"mean_elev\": 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{\"country\": \"Russia\", \"area_km2\": 16823663, \"mean_elev\": 349.39955576435517}, {\"country\": \"Rwanda\", \"area_km2\": 25391, \"mean_elev\": 1693.274448142281}, {\"country\": \"S Georgia & S Sandwich Is\", \"area_km2\": 3903, \"mean_elev\": 467.6963434596435}, {\"country\": \"Saint Lucia\", \"area_km2\": 620, \"mean_elev\": 201.55316288720886}, {\"country\": \"Samoa\", \"area_km2\": 2879, \"mean_elev\": 352.4938143751018}, {\"country\": \"San Marino\", \"area_km2\": 61, \"mean_elev\": 358.74585319554194}, {\"country\": \"Sao Tome & Principe\", \"area_km2\": 994, \"mean_elev\": 263.8449941771506}, {\"country\": \"Saudi Arabia\", \"area_km2\": 1928799, \"mean_elev\": 638.623724723655}, {\"country\": \"Senegal\", \"area_km2\": 197005, \"mean_elev\": 50.85166966575258}, {\"country\": \"Senkakus\", \"area_km2\": 4, \"mean_elev\": 0.0}, {\"country\": \"Serbia\", \"area_km2\": 77301, \"mean_elev\": 408.5206343019234}, {\"country\": \"Seychelles\", \"area_km2\": 435, \"mean_elev\": 1.5162593792137953}, {\"country\": \"Siachen-Saltoro Area\", \"area_km2\": 2798, \"mean_elev\": 5332.4599932140945}, {\"country\": \"Sierra Leone\", \"area_km2\": 72678, \"mean_elev\": 194.75525938456272}, {\"country\": \"Sinafir & Tiran Is.\", \"area_km2\": 86, \"mean_elev\": 0.0}, {\"country\": \"Singapore\", \"area_km2\": 689, \"mean_elev\": 15.554009497733837}, {\"country\": \"Sint Maarten\", \"area_km2\": 38, \"mean_elev\": 0.0}, {\"country\": \"Slovakia\", \"area_km2\": 48876, \"mean_elev\": 457.46891570314295}, {\"country\": \"Slovenia\", \"area_km2\": 20227, \"mean_elev\": 550.7804059600483}, {\"country\": \"Solomon Is\", \"area_km2\": 27960, \"mean_elev\": 222.57164680757077}, {\"country\": \"Somalia\", \"area_km2\": 636128, \"mean_elev\": 419.99584461790363}, {\"country\": \"South Africa\", \"area_km2\": 1221430, \"mean_elev\": 1027.2701301990564}, {\"country\": \"South Sudan\", \"area_km2\": 645196, \"mean_elev\": 516.8158394028782}, {\"country\": \"Spain\", \"area_km2\": 498000, \"mean_elev\": 690.033603528788}, {\"country\": \"Spain (Africa)\", \"area_km2\": 34, \"mean_elev\": 46.09501483974357}, {\"country\": \"Spain (Canary Is)\", \"area_km2\": 7413, \"mean_elev\": 529.4932504523123}, {\"country\": \"Spratly Is\", \"area_km2\": 0, \"mean_elev\": null}, {\"country\": \"Sri Lanka\", \"area_km2\": 66254, \"mean_elev\": 177.16938394834833}, {\"country\": \"St Barthelemy\", \"area_km2\": 23, \"mean_elev\": 0.0}, {\"country\": \"St Helena\", \"area_km2\": 411, \"mean_elev\": 246.11565019106908}, {\"country\": \"St Kitts & Nevis\", \"area_km2\": 270, \"mean_elev\": 49.30897327994231}, {\"country\": \"St Martin\", \"area_km2\": 56, \"mean_elev\": 0.0}, {\"country\": \"St Pierre & Miquelon\", \"area_km2\": 235, \"mean_elev\": 57.71921243372651}, {\"country\": \"St Vincent & the Grenadines\", \"area_km2\": 371, \"mean_elev\": 138.48402806204192}, {\"country\": \"Sudan\", \"area_km2\": 1835114, \"mean_elev\": 529.2117568153562}, {\"country\": \"Suriname\", \"area_km2\": 146474, \"mean_elev\": 155.89052593103355}, {\"country\": \"Svalbard\", \"area_km2\": 59717, \"mean_elev\": 362.06132880806655}, {\"country\": \"Swaziland\", \"area_km2\": 17393, \"mean_elev\": 621.2750834474174}, {\"country\": \"Sweden\", \"area_km2\": 445075, \"mean_elev\": 335.0238823238199}, {\"country\": \"Switzerland\", \"area_km2\": 41182, \"mean_elev\": 1305.580647093195}, {\"country\": \"Syria\", \"area_km2\": 187572, \"mean_elev\": 514.41040103127}, {\"country\": \"Taiwan\", \"area_km2\": 36407, \"mean_elev\": 782.8250559618533}, {\"country\": \"Tajikistan\", \"area_km2\": 141179, \"mean_elev\": 2950.4637443229853}, {\"country\": \"Tanzania\", \"area_km2\": 944270, \"mean_elev\": 1016.2112880440152}, {\"country\": \"Thailand\", \"area_km2\": 515256, \"mean_elev\": 284.69833756447093}, {\"country\": \"Timor-Leste\", \"area_km2\": 15003, \"mean_elev\": 459.2363205047445}, {\"country\": \"Togo\", \"area_km2\": 56908, \"mean_elev\": 259.3245586895906}, {\"country\": \"Tokelau\", \"area_km2\": 6, \"mean_elev\": 0.0}, {\"country\": \"Tonga\", \"area_km2\": 629, \"mean_elev\": 13.340030992699557}, {\"country\": \"Trinidad & Tobago\", \"area_km2\": 5182, \"mean_elev\": 94.39606099198426}, {\"country\": \"Tunisia\", \"area_km2\": 155323, \"mean_elev\": 253.71684171069361}, {\"country\": \"Turkey\", \"area_km2\": 779833, \"mean_elev\": 1128.2714956485554}, {\"country\": \"Turkmenistan\", \"area_km2\": 488868, \"mean_elev\": 196.3498301043765}, {\"country\": \"Turks & Caicos Is\", \"area_km2\": 883, \"mean_elev\": 1.4363425953880389}, {\"country\": \"Tuvalu\", \"area_km2\": 29, \"mean_elev\": 0.0}, {\"country\": \"US Minor Pacific Is. Refuges\", \"area_km2\": 26, \"mean_elev\": 0.012971470974487802}, {\"country\": \"US Virgin Is\", \"area_km2\": 354, \"mean_elev\": 46.779417632096695}, {\"country\": \"Uganda\", \"area_km2\": 242463, \"mean_elev\": 1154.6997083244328}, {\"country\": \"Ukraine\", \"area_km2\": 595909, \"mean_elev\": 181.48739660440143}, {\"country\": \"United Arab Emirates\", \"area_km2\": 70736, \"mean_elev\": 116.5453372022592}, {\"country\": \"United Kingdom\", \"area_km2\": 243168, \"mean_elev\": 160.80948105075888}, {\"country\": \"United States\", \"area_km2\": 7781400, \"mean_elev\": 794.0242033157863}, {\"country\": \"United States (Alaska)\", \"area_km2\": 1494935, \"mean_elev\": 453.3051724599716}, {\"country\": \"United States (Hawaii)\", \"area_km2\": 16884, \"mean_elev\": 890.8569915498077}, {\"country\": \"Uruguay\", \"area_km2\": 177797, \"mean_elev\": 109.18057399621536}, {\"country\": \"Uzbekistan\", \"area_km2\": 448337, \"mean_elev\": 347.16752392862236}, {\"country\": \"Vanuatu\", \"area_km2\": 12126, \"mean_elev\": 253.07991697349073}, {\"country\": \"Vatican City\", \"area_km2\": 1, \"mean_elev\": 51.752227783203125}, {\"country\": \"Venezuela\", \"area_km2\": 915896, \"mean_elev\": 347.97725199206224}, {\"country\": \"Vietnam\", \"area_km2\": 328212, \"mean_elev\": 395.0657202419943}, {\"country\": \"Wake I\", \"area_km2\": 8, \"mean_elev\": 0.0}, {\"country\": \"Wallis & Futuna\", \"area_km2\": 176, \"mean_elev\": 15.816981978583753}, {\"country\": \"West Bank\", \"area_km2\": 5813, \"mean_elev\": 341.71581601891745}, {\"country\": \"Western Sahara\", \"area_km2\": 269689, \"mean_elev\": 253.17510048477115}, {\"country\": \"Yemen\", \"area_km2\": 454682, \"mean_elev\": 932.0513512099999}, {\"country\": \"Zambia\", \"area_km2\": 754032, \"mean_elev\": 1118.9959497695602}, {\"country\": \"Zimbabwe\", \"area_km2\": 391916, \"mean_elev\": 973.2955548809969}]}}, {\"mode\": \"vega-lite\"});\n",
-       "</script>"
-      ],
-      "text/plain": [
-       "alt.Chart(...)"
-      ]
-     },
-     "execution_count": null,
-     "metadata": {},
-     "output_type": "execute_result"
-    }
-   ],
-   "source": [
-    "alt.Chart(df).mark_circle(size=60).encode(\n",
-    "    x='area_km2',\n",
-    "    y='mean_elev',\n",
-    "    tooltip=['country']\n",
-    ").interactive()"
-   ]
-  },
   {
    "cell_type": "markdown",
    "metadata": {},