Lviv districts.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "import http.client as http\n",
    "from urllib.parse import quote\n",
    "import json\n",
    "from time import sleep\n",
    "\n",
    "def wikimapia_request(function, additional_query):\n",
    "    key = \"B0B82BBD-9F7D7E6E-FEFF457C-41A336F9-9C94B3C8-1EC8D213-E1D3CF06-38539DF1\"\n",
    "\n",
    "    query = \"/?function={0}&key={1}&format=json&\".format(function, key) + additional_query\n",
    "\n",
    "    conn = http.HTTPConnection(\"api.wikimapia.org\")\n",
    "    conn.request(\"GET\", query)\n",
    "    res = conn.getresponse()\n",
    "    res_str = res.read().decode(\"utf-8\")\n",
    "    return json.loads(res_str)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Забагато категорії. Спробую шукати вручну..."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "([], '[]')"
      ]
     },
     "execution_count": 30,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "district_categories_ids = [7109, 80414, 2700]\n",
    "lat1 = 49.764456\n",
    "lat2 = 49.895661\n",
    "lng1 = 23.875767\n",
    "lng2 = 24.191528\n",
    "\n",
    "function = \"place.getbyarea\"\n",
    "additional_query=\"lon_min={0}&lat_min={1}&lon_max={2}&lat_max={3}&category={4}\".format(lng1, lat1, lng2, lat2, 45057)\n",
    "wikimapia_request(function, additional_query)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Немає нічого. Спробую Getnearest"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "({'count': 5, 'found': 0, 'language': 'en', 'places': []},\n",
       " '{\"language\":\"en\",\"places\":[],\"found\":0,\"count\":5}')"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "lat = 49.8333805\n",
    "lng = 24.036021\n",
    "\n",
    "function = \"place.getnearest\"\n",
    "additional_query=\"lon={0}&lat={1}&category={2}\".format(lng1, lat1, 45057)\n",
    "wikimapia_request(function, additional_query)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "([], '[]')"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "function = \"place.getbyarea\"\n",
    "additional_query=\"lon_min={0}&lat_min={1}&lon_max={2}&lat_max={3}&category={4}\".format(lng1, lat1, lng2, lat2, 45057)\n",
    "wikimapia_request(function, additional_query)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "([], '[]')"
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "function = \"place.getbyarea\"\n",
    "additional_query=\"lon_min={0}&lat_min={1}&lon_max={2}&lat_max={3}\".format(lng1, lat1, lng2, lat2)\n",
    "wikimapia_request(function, additional_query)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "({'count': 5, 'found': 0, 'language': 'en', 'page': 1, 'places': []},\n",
       " '{\"language\":\"en\",\"found\":0,\"places\":[],\"page\":1,\"count\":5}')"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "function = \"place.search\"\n",
    "additional_query=\"lon={0}&lat={1}&category={2}&distance={3}&q={4}\".format(lng1, lat1, 45057, 12000.0, \"syk\")\n",
    "wikimapia_request(function, additional_query)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "({'category': {'amount': 80414,\n",
       "   'description': 'A residential neighbourhood or community is a community, usually a group of buildings in a  town or a city, that is composed mostly of residents, as opposed to commercial businesses and/or industrial facilities.\\n\\nhttp://en.wikipedia.org/wiki/Residential_community',\n",
       "   'icon': 'http://wikimapia.org/mapico/00/00/00/00/00.png',\n",
       "   'id': 45057,\n",
       "   'name': 'residential neighbourhood',\n",
       "   'synonyms': [{'id': 44692, 'name': 'residential area'},\n",
       "    {'id': 95899, 'name': 'residential neighborhood'}]}},\n",
       " '{\"category\":{\"id\":45057,\"amount\":80414,\"icon\":\"http:\\\\/\\\\/wikimapia.org\\\\/mapico\\\\/00\\\\/00\\\\/00\\\\/00\\\\/00.png\",\"name\":\"residential neighbourhood\",\"description\":\"A residential neighbourhood or community is a community, usually a group of buildings in a  town or a city, that is composed mostly of residents, as opposed to commercial businesses and\\\\/or industrial facilities.\\\\n\\\\nhttp:\\\\/\\\\/en.wikipedia.org\\\\/wiki\\\\/Residential_community\",\"synonyms\":[{\"id\":44692,\"name\":\"residential area\"},{\"id\":95899,\"name\":\"residential neighborhood\"}]}}')"
      ]
     },
     "execution_count": 24,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "function = \"category.getbyid\"\n",
    "additional_query=\"id={0}\".format(45057)\n",
    "wikimapia_request(function, additional_query)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
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      ]
     },
     "execution_count": 36,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "function = \"box\"\n",
    "additional_query=\"lon_min={0}&lat_min={1}&lon_max={2}&lat_max={3}&category={4}&count=50\".format(lng1, lat1, lng2, lat2, 45057)\n",
    "wikimapia_request(function, additional_query)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "import codecs\n",
    "categories = {\n",
    "    'neighbourhood': 45057,\n",
    "    'historic': 46460,\n",
    "    'district': 45535\n",
    "}\n",
    "lat1 = 49.5\n",
    "lat2 = 50.5\n",
    "lng1 = 23.5\n",
    "lng2 = 24.5\n",
    "\n",
    "def dump_polygons(category_name, category_id):\n",
    "    result = {[]}\n",
    "    left = 100\n",
    "    page = 1\n",
    "    while(left > 0):\n",
    "        function = \"box\"\n",
    "        additional_query=\"lon_min={0}&lat_min={1}&lon_max={2}&lat_max={3}&category={4}&count=100&page={5}\".format(lng1, lat1, lng2, lat2, category_id, page)\n",
    "        response = wikimapia_request(function, additional_query)\n",
    "        result[\"polygons\"] += response[\"folder\"]\n",
    "        left = int(response[\"found\"]) - int(response[\"count\"])*page\n",
    "        page += 1\n",
    "        \n",
    "    with codecs.open(\"./polygons/{0}.json\".format(category_name), 'w', 'utf8') as f:\n",
    "        json.dump(result, f, indent = 2, ensure_ascii = False)\n",
    "\n",
    "for cat_name in categories.keys():\n",
    "    cat_id = categories[cat_name]\n",
    "    dump_polygons(cat_name, cat_id)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Result is total shit. Ok, let's get town districts one by one."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 57,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "district_ids = [4556239, 5130168, 5028866, 5130483, 5130576, 5130668]\n",
    "\n",
    "def get_object_polygon(object_id):\n",
    "    function = \"place.getbyid\"\n",
    "    additional_query=\"id={0}\".format(object_id)\n",
    "    response = wikimapia_request(function, additional_query)\n",
    "    result = {\"properties\": {\"name\" : response[\"availableLanguages\"][\"en\"][\"object_local_slug\"]},\n",
    "              \"type\":\"Feature\", \n",
    "              \"geometry\": { \"type\": \"Polygon\", \"coordinates\": [list(map(lambda c: [c[\"x\"], c[\"y\"]], response[\"polygon\"]))] }}\n",
    "    \n",
    "    return result\n",
    "\n",
    "#result = {\"type\":\"GeometryCollection\", \"geometries\": []}\n",
    "result = {\"type\":\"FeatureCollection\", \"features\": []}\n",
    "for dis_id in district_ids:\n",
    "    result[\"features\"].append(get_object_polygon(dis_id))\n",
    "    \n",
    "with codecs.open(\"./polygons/district.geo.json\",'w', 'utf8') as f:\n",
    "    json.dump(result, f, indent = 2, ensure_ascii = False)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "def inside_polygon(x, y, points):\n",
    "    \"\"\"\n",
    "    Return True if a coordinate (x, y) is inside a polygon defined by\n",
    "    a list of verticies [(x1, y1), (x2, x2), ... , (xN, yN)].\n",
    "\n",
    "    Reference: http://www.ariel.com.au/a/python-point-int-poly.html\n",
    "    \"\"\"\n",
    "    n = len(points)\n",
    "    inside = False\n",
    "    [p1x, p1y] = points[0]\n",
    "    for i in range(1, n + 1):\n",
    "        [p2x, p2y] = points[i % n]\n",
    "        if y > min(p1y, p2y):\n",
    "            if y <= max(p1y, p2y):\n",
    "                if x <= max(p1x, p2x):\n",
    "                    if p1y != p2y:\n",
    "                        xinters = (y - p1y) * (p2x - p1x) / (p2y - p1y) + p1x\n",
    "                    if p1x == p2x or x <= xinters:\n",
    "                        inside = not inside\n",
    "        p1x, p1y = p2x, p2y\n",
    "    return inside"
   ]
  }
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