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  {
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   "metadata": {},
   "source": [
    "# MovingPandas Minimum Viable Example\n",
    "\n",
    "<img align=\"right\" src=\"https://movingpandas.github.io/movingpandas/assets/img/movingpandas.png\">\n",
    "\n",
    "[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/movingpandas/movingpandas-examples/main?filepath=1-tutorials/99-mini-example.ipynb)\n",
    "\n",
    "MovingPandas provides a trajectory datatype based on GeoPandas.\n",
    "The project home is at https://github.com/movingpandas/movingpandas\n",
    "\n",
    "The documentation is available at https://movingpandas.readthedocs.io/en/main/"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import warnings\n",
    "warnings.filterwarnings('ignore')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import pandas as pd\n",
    "import geopandas as gpd\n",
    "import movingpandas as mpd\n",
    "from hvplot import pandas\n",
    "from datetime import datetime, timedelta"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Loading trajectory data from a GeoPackage\n",
    "\n",
    "The MovingPandas repository contains a demo GeoPackage file that can be loaded as follows:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "gdf = gpd.read_file('../data/geolife_small.gpkg')\n",
    "gdf.plot(figsize=(9,5))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "gdf.hvplot(geo=True).opts(active_tools=['pan', 'wheel_zoom'])"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "After reading the trajectory point data from file, we want to construct the trajectories."
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Creating a TrajectoryCollection"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "tc = mpd.TrajectoryCollection(gdf, 'trajectory_id', t='t')\n",
    "tc"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "tc.plot(column='trajectory_id', legend=True, figsize=(9,5))"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Exploring movement speed"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "tc.plot(column='speed', linewidth=5, capstyle='round', legend=True, vmax=20, figsize=(9,5))"
   ]
  },
  {
   "attachments": {},
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Detecting stops"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "detector = mpd.TrajectoryStopDetector(tc)\n",
    "stop_points = detector.get_stop_points(min_duration=timedelta(seconds=120), max_diameter=100)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "ax = tc.plot(figsize=(9,5))\n",
    "stop_points.plot(ax=ax, color='red', markersize=100)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "( tc.hvplot(line_width=7, tiles=None, frame_width=400, frame_height=400) * \n",
    " stop_points.hvplot(geo=True, color='black', size=100) )"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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