{
    "cells": [
        {
            "cell_type": "markdown",
            "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",
            "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,
            "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,
            "metadata": {},
            "outputs": [],
            "source": [
                "import ee\n",
                "import geemap"
            ]
        },
        {
            "cell_type": "markdown",
            "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,
            "metadata": {},
            "outputs": [],
            "source": [
                "Map = geemap.Map(center=[40, -100], zoom=4)\n",
                "Map.add_basemap('HYBRID')  # Add Google Satellite\n",
                "Map"
            ]
        },
        {
            "cell_type": "markdown",
            "metadata": {},
            "source": [
                "### Draw any shapes on the map above using the Draw Control."
            ]
        },
        {
            "cell_type": "code",
            "execution_count": null,
            "metadata": {},
            "outputs": [],
            "source": [
                "# Retrieves ee.Feature() of the last drawing object.\n",
                "Map.draw_last_feature"
            ]
        },
        {
            "cell_type": "code",
            "execution_count": null,
            "metadata": {},
            "outputs": [],
            "source": [
                "# Retrieves ee.Feature() of all drawing objects.\n",
                "Map.draw_features"
            ]
        },
        {
            "cell_type": "markdown",
            "metadata": {},
            "source": [
                "## Clipping Earth Engine Image layer with the Draw Control"
            ]
        },
        {
            "cell_type": "code",
            "execution_count": null,
            "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,
            "metadata": {},
            "outputs": [],
            "source": [
                "# Print out the geojson of the last drawing object\n",
                "dc.last_draw"
            ]
        }
    ],
    "metadata": {
        "kernelspec": {
            "display_name": "Python 3",
            "language": "python",
            "name": "python3"
        }
    },
    "nbformat": 4,
    "nbformat_minor": 5
}