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    "<a href=\"https://githubtocolab.com/giswqs/geemap/blob/master/examples/notebooks/26_heroku.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open in Colab\"/></a>\n",
    "\n",
    "Uncomment the following line to install [geemap](https://geemap.org) if needed."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# !pip install geemap"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import ee\n",
    "import geemap"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Earth Engine App"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "Map = geemap.Map(center=(40, -100), zoom=4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# Add Earth Engine dataset\n",
    "dem = ee.Image('USGS/SRTMGL1_003')\n",
    "landcover = ee.Image(\"ESA/GLOBCOVER_L4_200901_200912_V2_3\").select('landcover')\n",
    "landsat7 = ee.Image('LE7_TOA_5YEAR/1999_2003')\n",
    "states = ee.FeatureCollection(\"TIGER/2018/States\")\n",
    "\n",
    "# Set visualization parameters.\n",
    "vis_params = {\n",
    "  'min': 0,\n",
    "  'max': 4000,\n",
    "  'palette': ['006633', 'E5FFCC', '662A00', 'D8D8D8', 'F5F5F5']}\n",
    "\n",
    "# Add Earth Eninge layers to Map\n",
    "Map.addLayer(landsat7, {'bands': ['B4', 'B3', 'B2'], 'min': 20, 'max': 200}, 'Landsat 7')\n",
    "Map.addLayer(landcover, {}, 'Land cover')\n",
    "Map.addLayer(dem, vis_params, 'SRTM DEM', True, 1)\n",
    "Map.addLayer(states, {}, \"US States\")\n",
    "\n",
    "Map"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "print('Change layer opacity:')\n",
    "dem_layer = Map.layers[-2]\n",
    "dem_layer.interact(opacity=(0, 1, 0.1))"
   ]
  }
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