{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "0",
   "metadata": {},
   "source": [
    "<table class=\"ee-notebook-buttons\" align=\"left\">\n",
    "    <td><a target=\"_parent\"  href=\"https://github.com/gee-community/geemap/tree/master/examples/notebooks/ipyleaflet_draw_control.ipynb\"><img width=32px src=\"https://www.tensorflow.org/images/GitHub-Mark-32px.png\" /> View source on GitHub</a></td>\n",
    "    <td><a target=\"_parent\"  href=\"https://nbviewer.jupyter.org/github/gee-community/geemap/blob/master/examples/notebooks/ipyleaflet_draw_control.ipynb\"><img width=26px src=\"https://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Jupyter_logo.svg/883px-Jupyter_logo.svg.png\" />Notebook Viewer</a></td>\n",
    "    <td><a target=\"_parent\"  href=\"https://colab.research.google.com/github/gee-community/geemap/blob/master/examples/notebooks/ipyleaflet_draw_control.ipynb\"><img width=26px src=\"https://www.tensorflow.org/images/colab_logo_32px.png\" /> Run in Google Colab</a></td>\n",
    "</table>"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "1",
   "metadata": {},
   "source": [
    "# Using ipyleaflet drawing tools to interact with Earth Engine data\n",
    "\n",
    "* [Video demo](https://i.imgur.com/SzauIsZ.gifv)\n",
    "\n",
    "## Install Earth Engine API and geemap\n",
    "Install the [Earth Engine Python API](https://developers.google.com/earth-engine/python_install) and [geemap](https://github.com/gee-community/geemap). The **geemap** Python package is built upon the [ipyleaflet](https://github.com/jupyter-widgets/ipyleaflet) and [folium](https://github.com/python-visualization/folium) packages and implements several methods for interacting with Earth Engine data layers, such as `Map.addLayer()`, `Map.setCenter()`, and `Map.centerObject()`.\n",
    "The following script checks if the geemap package has been installed. If not, it will install geemap, which automatically installs its [dependencies](https://github.com/gee-community/geemap#dependencies), including earthengine-api, folium, and ipyleaflet."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "2",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Installs geemap package\n",
    "import subprocess\n",
    "\n",
    "try:\n",
    "    import geemap\n",
    "except ImportError:\n",
    "    print(\"geemap package not installed. Installing ...\")\n",
    "    subprocess.check_call([\"python\", \"-m\", \"pip\", \"install\", \"-U\", \"geemap\"])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3",
   "metadata": {},
   "outputs": [],
   "source": [
    "import ee\n",
    "import geemap"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "4",
   "metadata": {},
   "source": [
    "## Create an interactive map \n",
    "The default basemap is `Google Satellite`. [Additional basemaps](https://github.com/gee-community/geemap/blob/master/geemap/geemap.py#L13) can be added using the `Map.add_basemap()` function."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "5",
   "metadata": {},
   "outputs": [],
   "source": [
    "Map = geemap.Map(center=[40, -100], zoom=4)\n",
    "Map.add_basemap(\"HYBRID\")  # Add Google Satellite\n",
    "Map"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "6",
   "metadata": {},
   "source": [
    "### Draw any shapes on the map above using the Draw Control."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Retrieves ee.Feature() of the last drawing object.\n",
    "Map.draw_last_feature"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "8",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Retrieves ee.Feature() of all drawing objects.\n",
    "Map.draw_features"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "9",
   "metadata": {},
   "source": [
    "## Clipping Earth Engine Image layer with the Draw Control"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "10",
   "metadata": {},
   "outputs": [],
   "source": [
    "import ipywidgets as widgets\n",
    "from ipyleaflet import WidgetControl\n",
    "from geemap import geojson_to_ee\n",
    "\n",
    "Map = geemap.Map(center=[40, -100], zoom=4)\n",
    "Map.add_basemap(\"HYBRID\")  # Add\n",
    "\n",
    "# Add Earth Engine dataset\n",
    "image = ee.Image(\"USGS/SRTMGL1_003\")\n",
    "\n",
    "# Set visualization parameters.\n",
    "vis_params = {\n",
    "    \"min\": 0,\n",
    "    \"max\": 4000,\n",
    "    \"palette\": [\"006633\", \"E5FFCC\", \"662A00\", \"D8D8D8\", \"F5F5F5\"],\n",
    "}\n",
    "\n",
    "# Get basemap layers\n",
    "base_layers = Map.layers\n",
    "\n",
    "# Add Earth Engine DEM to map\n",
    "Map.addLayer(image, vis_params, \"SRTM DEM\")\n",
    "\n",
    "# An empty list for storing drawing geometries\n",
    "feat_list = []\n",
    "\n",
    "# Get the DrawControl\n",
    "dc = Map.draw_control\n",
    "\n",
    "\n",
    "# Handle draw events\n",
    "def handle_draw(self, action, geo_json):\n",
    "    geom = geojson_to_ee(geo_json, False)\n",
    "    feature = ee.Feature(geom)\n",
    "    feat_list.append(feature)\n",
    "    collection = ee.FeatureCollection(feat_list)\n",
    "    clip_image = image.clipToCollection(collection)\n",
    "\n",
    "    Map.layers = base_layers[:3]\n",
    "    Map.addLayer(clip_image, vis_params, \"SRTM DEM\")\n",
    "    #     Map.addLayer(ee.Image().paint(collection, 0, 2), {'palette': 'red'}, 'EE Geometry')\n",
    "    Map.addLayer(collection, {}, \"Drawing Features\")\n",
    "\n",
    "\n",
    "dc.on_draw(handle_draw)\n",
    "\n",
    "# # Add a button to the map\n",
    "# button = widgets.Button(description=\"Clear drawings\")\n",
    "# btn_control = WidgetControl(widget=button, position='bottomright')\n",
    "# Map.add_control(btn_control)\n",
    "\n",
    "# # Handle click event\n",
    "# def on_button_clicked(b):\n",
    "#     dc.clear()\n",
    "\n",
    "# button.on_click(on_button_clicked)\n",
    "\n",
    "Map"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "11",
   "metadata": {},
   "outputs": [],
   "source": [
    "# Print out the geojson of the last drawing object\n",
    "dc.last_draw"
   ]
  }
 ],
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