{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "0",
   "metadata": {},
   "outputs": [],
   "source": [
    "import ee\n",
    "import geemap"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "1",
   "metadata": {},
   "outputs": [],
   "source": [
    "Map = geemap.Map(zoom=8)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "2",
   "metadata": {},
   "outputs": [],
   "source": [
    "image = ee.Image(\"LANDSAT/LE7_TOA_5YEAR/1999_2003\").select(\n",
    "    [\"B1\", \"B2\", \"B3\", \"B4\", \"B5\", \"B7\"]\n",
    ")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "3",
   "metadata": {},
   "outputs": [],
   "source": [
    "Map.addLayer(\n",
    "    image,\n",
    "    {\"bands\": [\"B4\", \"B3\", \"B2\"], \"min\": 20, \"max\": 200, \"gamma\": 2.0},\n",
    "    \"Landsat 7\",\n",
    ")\n",
    "Map"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "4",
   "metadata": {},
   "outputs": [],
   "source": [
    "region = Map.user_roi"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "5",
   "metadata": {},
   "outputs": [],
   "source": [
    "if region is None:\n",
    "    region = ee.Geometry.Point([-101.5, 40]).buffer(100000)\n",
    "    Map.addLayer(ee.Image().paint(region, 0, 4), {\"palette\": \"yellow\"}, \"ROI-1\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "6",
   "metadata": {},
   "outputs": [],
   "source": [
    "random_points = geemap.random_sampling(image, region, numPixels=1000)\n",
    "Map.addLayer(random_points, {}, \"Random Sampling\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "7",
   "metadata": {},
   "outputs": [],
   "source": [
    "df = geemap.ee_to_df(random_points)\n",
    "df"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "8",
   "metadata": {},
   "outputs": [],
   "source": [
    "region2 = Map.user_roi"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "9",
   "metadata": {},
   "outputs": [],
   "source": [
    "if region2 is None:\n",
    "    region2 = ee.Geometry.Point([-99, 40]).buffer(100000)\n",
    "    Map.addLayer(ee.Image().paint(region2, 0, 4), {\"palette\": \"blue\"}, \"ROI-2\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "10",
   "metadata": {},
   "outputs": [],
   "source": [
    "sys_points = geemap.random_sampling(image, region2, scale=10000)\n",
    "Map.addLayer(sys_points, {}, \"Systematic Sampling\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "11",
   "metadata": {},
   "outputs": [],
   "source": [
    "df = geemap.ee_to_df(sys_points)\n",
    "df"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "12",
   "metadata": {},
   "source": [
    "![](https://i.imgur.com/14ulR5D.png)"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 5
}