ddk.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import requests\n",
    "import time\n",
    "\n",
    "import geopandas as gpd\n",
    "from shapely.geometry import Point, LineString"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Set your OpenRouteService API key in the environment before starting the notebook server.\n",
    "\n",
    "import os\n",
    "\n",
    "api_key = os.environ.get('API_KEY')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "places = \"Velem, Bozsok, Torony, Sé, Olad, Szombathely, Nárai, Ják, Egyházasrádóc, Körmend, Halogy, Ivánc, Hegyhátszentmárton, Kondorfa, Szalafő, Őriszentpéter, Nagyrákos, Kerkáskápolna, Magyarföld, Magyarszombatfa, Gödörháza, Velemér, Szentgyörgyvölgy, Kógyár, Felsőszenterzsébet, Kerkafalva, Pusztaszentpéter, Felsőcsöde, Csöde, Pankasz, Kisrákos, Szaknyér, Hegyhátszentjakab, Vadása-tó, Zalalövő, Nagyfernekág, Salomvár, Zalacséb, Kávás, Ebergény, Zalaegerszeg, Babosdöbréte, Milejszeg, Pálfiszeg, Csonkahegyhát, Kislengyel, Vargaszeg, Vörösszeg, Győrfiszeg, Zalatárnok, Szentkozmadombja, Rádiháza, Söjtör, Tófej, Gutorfölde, Szentpéterfölde, Bázakerettye, Kistolmács, Borsfa, Valkonya, Obornak, Homokkomárom, Nagykanizsa, Miklósfa, Surd, Belezna, Őrtilos, Zákány, Somogybükkösd, Nemespátró, Ágneslak, Csurgónagymarton, Csurgó, Berzence, Somogyudvarhely, Vízvár, Babócsa, Komlósd, Drávaszentes, Barcs, Szulok, Kálmáncsa, Lad, Dióspuszta, Magyarlukafa, Somogyhárságy, Kishárságy, Visnyeszéplak, Szilvásszentmárton, Patca, Szenna, Kaposszerdahely, Kaposszentjakab, Kaposvár, Zselickislak, Simonfa, Gálosfa, Ibafa, Kán, Gorica, Hetvehely, Abaliget, Orfű, Kővágószőlős, Kővágótöttös, Cserkút, Bakonya, Pécs, Pécsbánya, Mánfa, Árpádtető, Zobákpuszta, Kisújbánya, Püspökszentlászló, Pécsvárad, Zengővárkony, Kisújbánya, Óbánya, Mecseknádasd, Apátvarasd, Ófalu, Bátaapáti, Mórágy, Kismórágy, Zsibrik, Mőcsény, Szálka, Grábóc, Szekszárd\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "129\n"
     ]
    }
   ],
   "source": [
    "places_split = places.split(', ')\n",
    "print(len(places_split))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "scrolled": true
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "129/129\r"
     ]
    }
   ],
   "source": [
    "results = []\n",
    "\n",
    "for i, p in enumerate(places_split):\n",
    "    r = requests.get(f'https://nominatim.openstreetmap.org/search/{p}, Hungary?format=json')\n",
    "    rdata = r.json()[0]\n",
    "    data = {'lat': float(rdata['lat']), 'lon': float(rdata['lon']), 'name': rdata['display_name'].split(',')[0],\n",
    "            'geom': Point(float(rdata['lon']), float(rdata['lat']))}\n",
    "    results.append(data)\n",
    "    \n",
    "    time.sleep(1.1)\n",
    "    \n",
    "    print(f'{i+1}/{len(places_split)}', end='\\r')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [],
   "source": [
    "places_gdf = gpd.GeoDataFrame(results, geometry='geom')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [],
   "source": [
    "# save places points as a geojson\n",
    "\n",
    "places_gdf[['name', 'geom']].to_file(\"places.geojson\", driver='GeoJSON')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "metadata": {},
   "outputs": [],
   "source": [
    "# get hiking directions between points\n",
    "\n",
    "path_points = [list(x) for x in list(zip(gdf.lon, gdf.lat))]\n",
    "\n",
    "# the api can take at most 50 points for routing,\n",
    "# so we need to split the list in less-than-50-point,\n",
    "# parts where the last point in a part is the first \n",
    "# point of the next part\n",
    "#\n",
    "# note: this is a shoddy solution right now, but it works\n",
    "\n",
    "# https://stackoverflow.com/questions/312443/how-do-you-split-a-list-into-evenly-sized-chunks\n",
    "\n",
    "def chunks(lst, n):\n",
    "    \"\"\"Yield successive n+1-sized chunks from lst with \n",
    "    the last element repeated as the first element of\n",
    "    the next chunk.\"\"\"\n",
    "    for i in range(0, len(lst), n):\n",
    "        if i == 0:\n",
    "            yield lst[i:i + n]\n",
    "        else:\n",
    "            yield lst[i-1:i + n]\n",
    "\n",
    "path_point_lists = list(chunks(path_points, 30))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "metadata": {},
   "outputs": [],
   "source": [
    "list_of_path_coordinates = []\n",
    "\n",
    "for pts in path_point_lists:\n",
    "    headers = {\n",
    "        'Content-Type': 'application/json; charset=utf-8',\n",
    "        'Accept': 'application/json, application/geo+json, application/gpx+xml, img/png; charset=utf-8',\n",
    "        'Authorization': api_key,\n",
    "    }\n",
    "\n",
    "    data = f'{{\"coordinates\":{pts},\"instructions\":\"false\",\"preference\":\"recommended\"}}'\n",
    "\n",
    "    path_response = requests.post('https://api.openrouteservice.org/v2/directions/foot-hiking/geojson', headers=headers, data=data)\n",
    "    \n",
    "    if path_response.ok:\n",
    "        list_of_path_coordinates.extend(path_response.json()['features'][0]['geometry']['coordinates'])\n",
    "    else:\n",
    "        print('There was an error.')\n",
    "        break\n",
    "    \n",
    "    time.sleep(2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 54,
   "metadata": {},
   "outputs": [],
   "source": [
    "hikepath_gdf = gpd.GeoDataFrame([{'geom': LineString(list_of_path_coordinates)}], geometry='geom')\n",
    "hikepath_gdf.to_file(\"path.geojson\", driver='GeoJSON')"
   ]
  }
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