nearby_chargers.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Application Flowchart\n",
    "\n",
    "``` python\n",
    "    Given: start, destin\n",
    "    Calculate route(start, destin)\n",
    "    \n",
    "    if d(route)<battery:\n",
    "        display(route)\n",
    "    \n",
    "    else:\n",
    "        find chargers in country\n",
    "        select nearby chargers\n",
    "        A* routing with chargers (battery-aware)\n",
    "        \n",
    "        route(start, chargers, destin)\n",
    "        display(route)\n",
    "```"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Explore links:\n",
    "# * Search electric vehicle chargers: https://developer.here.com/documentation/places/topics/quick-start-find-text-string.html\n",
    "# * "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "metadata": {},
   "outputs": [],
   "source": [
    "#-*- coding: utf-8 -*-\n",
    "import sys\n",
    "import json\n",
    "import requests\n",
    "from geopy.distance import geodesic\n",
    "\n",
    "# coords are in format [lat,lon]\n",
    "start    = [59.35 , 18   ]\n",
    "destin   = [57.755, 14.13]\n",
    "distance = 150*0.65  # battery autonomy - count margin + roads are not straight\n",
    "country  = \"SE\" # ISO country code\n",
    "\n",
    "transport = \"car\"\n",
    "mode      = [\"fastest\", \"shortest\", \"balanced\"][0]\n",
    "traffic   = \"enabled\"\n",
    "\n",
    "response = requests.get(\"https://api.openchargemap.io/v3/poi/?output=json\"+\n",
    "                        \"&countrycode={0}\".format(country)+\n",
    "                        \"&latitude={0}&longitude={1}\".format(start[0], start[1])+\n",
    "                        \"&distance={0}&distanceunit=KM\".format(distance),\n",
    "                        \"&maxresults=500\").json()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 56,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Found 286 chargers nearby\n"
     ]
    }
   ],
   "source": [
    "chargers = []\n",
    "for charger in response:\n",
    "    # retrieve coordinates from each charging point\n",
    "    info = charger[\"AddressInfo\"]\n",
    "    coords = [info[\"Latitude\"], info[\"Longitude\"]]\n",
    "    # add to list\n",
    "    chargers.append(coords)\n",
    "\n",
    "print(\"Found\", len(chargers), \"chargers nearby\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 57,
   "metadata": {},
   "outputs": [
    {
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       " [58.605269, 16.675801]]"
      ]
     },
     "execution_count": 57,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "chargers"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 60,
   "metadata": {},
   "outputs": [],
   "source": [
    "# expand a charger - returns 5 closest-to-destin chargers\n",
    "def expand_charger(coords, goal_coords=destin, country=country, distane=distance):\n",
    "    # get chargers from the API\n",
    "    response = requests.get(\"https://api.openchargemap.io/v3/poi/?output=json\"+\n",
    "                            \"&countrycode={0}\".format(country)+\n",
    "                            \"&latitude={0}&longitude={1}\".format(coords[0], coords[1])+\n",
    "                            \"&distance={0}&distanceunit=KM\".format(distance),\n",
    "                            \"&maxresults=500\").json()\n",
    "    # get coords\n",
    "    chargers = []\n",
    "    for charger in response:\n",
    "        # retrieve coordinates from each charging point\n",
    "        info = charger[\"AddressInfo\"]\n",
    "        coords = [info[\"Latitude\"], info[\"Longitude\"]]\n",
    "        # add to list\n",
    "        chargers.append(coords)\n",
    "        \n",
    "    # sort by distance to goal. Return 5 closest.\n",
    "    chargers = [charger for charger in sorted(chargers, key=lambda x: geodesic(x, goal_coords))][:5]\n",
    "    \n",
    "    return chargers"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 61,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[[58.605269, 16.675801],\n",
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       " [59.015426, 16.206881]]"
      ]
     },
     "execution_count": 61,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "expand_charger(start)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# test A*"
   ]
  }
 ],
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