get-osmnx.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Get OSMnx Extraction"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import geopandas as gpd\n",
    "import pandas as pd\n",
    "import osmnx as ox\n",
    "import pickle"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Remote I/O"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "boundary_filename = \"nw_pdx.geojson\"\n",
    "osm_filename = \"Portland.osm\"\n",
    "pickle_filename = \"osmnx-graph.pickle\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "nw_pdx_gdf = gpd.read_file(boundary_filename)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## OSMnx Extraction"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Option 2: read from disk\n",
    "graph = ox.graph_from_xml(osm_filename, simplify = False)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "small_graph = ox.truncate.truncate_graph_bbox(\n",
    "    graph, \n",
    "    nw_pdx_gdf.bounds.maxy[0], \n",
    "    nw_pdx_gdf.bounds.miny[0], \n",
    "    nw_pdx_gdf.bounds.maxx[0], \n",
    "    nw_pdx_gdf.bounds.minx[0]\n",
    ")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "link_gdf = ox.graph_to_gdfs(small_graph, nodes = False, edges = True)\n",
    "link_gdf['osmid'] = (\n",
    " pd.DataFrame(link_gdf.osmid.tolist())\n",
    "   .fillna('')\n",
    "   .astype(str)\n",
    "   .agg(','.join, 1)\n",
    "   .str.strip(',')\n",
    ")\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
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      "text/plain": [
       "                          osmid                    name      highway maxspeed  \\\n",
       "u          v          key                                                       \n",
       "1367343800 40541098   0     NaN    North Failing Street  residential   20 mph   \n",
       "           7990710833 0     NaN    North Failing Street  residential   20 mph   \n",
       "1367343801 7990710837 0     NaN    North Failing Street  residential   20 mph   \n",
       "1367343802 40675211   0     NaN  North Vancouver Avenue    secondary   25 mph   \n",
       "           7990710834 0     NaN                     NaN      footway      NaN   \n",
       "\n",
       "                           oneway  length lanes service est_width width  \\\n",
       "u          v          key                                                 \n",
       "1367343800 40541098   0     False  31.178   NaN     NaN       NaN   NaN   \n",
       "           7990710833 0     False   0.804   NaN     NaN       NaN   NaN   \n",
       "1367343801 7990710837 0     False   1.078   NaN     NaN       NaN   NaN   \n",
       "1367343802 40675211   0      True   7.780     1     NaN       NaN   NaN   \n",
       "           7990710834 0     False   5.240   NaN     NaN       NaN   NaN   \n",
       "\n",
       "                          access landuse bridge  ref area tunnel junction  \\\n",
       "u          v          key                                                   \n",
       "1367343800 40541098   0      NaN     NaN    NaN  NaN  NaN    NaN      NaN   \n",
       "           7990710833 0      NaN     NaN    NaN  NaN  NaN    NaN      NaN   \n",
       "1367343801 7990710837 0      NaN     NaN    NaN  NaN  NaN    NaN      NaN   \n",
       "1367343802 40675211   0      NaN     NaN    NaN  NaN  NaN    NaN      NaN   \n",
       "           7990710834 0      NaN     NaN    NaN  NaN  NaN    NaN      NaN   \n",
       "\n",
       "                                                                    geometry  \n",
       "u          v          key                                                     \n",
       "1367343800 40541098   0    LINESTRING (-122.66808 45.55078, -122.66848 45...  \n",
       "           7990710833 0    LINESTRING (-122.66808 45.55078, -122.66807 45...  \n",
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       "1367343802 40675211   0    LINESTRING (-122.66794 45.55086, -122.66794 45...  \n",
       "           7990710834 0    LINESTRING (-122.66794 45.55086, -122.66787 45...  "
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "link_gdf.head()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [],
   "source": [
    "link_gdf = link_gdf.reset_index()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [],
   "source": [
    "osmnx_gdf = link_gdf[['osmid', 'u', 'v', 'geometry']]\n",
    "osmnx_gdf.to_file('osmnx_link_disk.geojson', driver='GeoJSON')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
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