Add gdf example

notebooks/elevation.ipynb

@@ -68,6 +68,61 @@
     "gdf.to_crs('epsg:4326')"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Fetching elevation data for a whole GeoDataFrame"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from utils.dataaccess import get_gdf_from_wfs\n",
+    "citybike_gdf = get_gdf_from_wfs('CITYBIKEOGD')\n",
+    "citybike_gdf = citybike_gdf.to_crs('epsg:3857')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def get_elevation_for_row(row):\n",
+    "    return get_elevation(row.geometry)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "citybike_gdf['elevation'] = citybike_gdf.apply(get_elevation_for_row, axis=1)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "citybike_gdf = citybike_gdf.to_crs('epsg:4326')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "citybike_gdf.hvplot(c='elevation', geo=True, tiles='OSM', title='Citybike station elevation')"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
@@ -92,7 +147,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.8"
+   "version": "3.7.10"
   }
  },
  "nbformat": 4,