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   "source": [
    "# Accessing Different Types of Webservices\n",
    "\n",
    "[![Binder](http://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/anitagraser/ogd-at-lab/main?urlpath=lab/tree/notebooks/webmapping.ipynb)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 1. Basemap tiles (XYZ tiles)\n",
    "\n",
    "Documentation:  http://geoviews.org/user_guide/Working_with_Bokeh.html\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import holoviews as hv\n",
    "import geoviews as gv\n",
    "gv.extension('bokeh')\n",
    "\n",
    "basemap = hv.element.tiles.OSM().opts(width=450, height=450)\n",
    "basemap"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 2. Web Map Services (WMS) \n",
    "Source: https://github.com/holoviz/geoviews/issues/481"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def load_wms(server=\"http://data.wien.gv.at/daten/geo\", layer=\"ogdwien:DONAUINSPKTOGD\", extents=(1825290,6144246,1827693,6146435)):\n",
    "    url = f\"{server}?&service=WMS&request=GetMap&layers={layer}&styles=&format=image/png&transparent=true&version=1.3.0&width=256&height=256&crs=EPSG:3857\"\n",
    "    url = url + \"&bbox={XMIN},{YMIN},{XMAX},{YMAX}\"\n",
    "    return hv.Tiles(url, extents=extents)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "map_with_overlay = basemap * load_wms()\n",
    "map_with_overlay"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "map_with_overlay * load_wms(layer=\"ogdwien:DONAUKILOMETEROGD\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 3. Web Feature Services (WFS) \n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import geopandas as gpd\n",
    "from urllib.request import urlretrieve\n",
    "import hvplot.pandas\n",
    "\n",
    "layer = 'RADGRAETZELOGD'\n",
    "file = f'data/{layer}.json'\n",
    "url = f\"https://data.wien.gv.at/daten/geo?service=WFS&request=GetFeature&version=1.1.0&typeName=ogdwien:{layer}&srsName=EPSG:4326&outputFormat=json\"\n",
    "urlretrieve(url, file)\n",
    "gdf = gpd.read_file(file)\n",
    "gdf"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "gdf.hvplot(geo=True, tiles='OSM', hover_cols='all').opts(active_tools=['wheel_zoom'])"
   ]
  }
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