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Added NLCD app
Browse files- notebooks/nlcd_app.ipynb +214 -0
notebooks/nlcd_app.ipynb
ADDED
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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "a6624f5d-8d87-41e1-949e-e01ea4bfd1fd",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Import libraries\n",
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"import ee\n",
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"import geemap"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "5b37a322-6723-4eef-b248-eca735b2fb11",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Create an interactive map by specifying the center (lat, lon) and zoom level (1-18).\n",
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"Map = geemap.Map(center=[40, -100], zoom=4, height=\"800px\")\n",
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"Map"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "8b939af3-e209-44fd-94cb-48027334ad71",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Import the NLCD collection.\n",
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"dataset = ee.ImageCollection('USGS/NLCD_RELEASES/2019_REL/NLCD')\n",
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"\n",
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"# Filter the collection to the 2016 product.\n",
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"nlcd2019 = dataset.filter(ee.Filter.eq('system:index', '2019')).first()\n",
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"\n",
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"# Select the land cover band.\n",
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"landcover = nlcd2019.select('landcover')\n",
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"\n",
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"# Display land cover on the map.\n",
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"Map.addLayer(landcover, {}, 'NLCD 2019')"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "bc45b8da",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Add the NLCD legend to the map.\n",
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"Map.add_legend(title='NLCD Land Cover Classification', builtin_legend='NLCD')"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "76b01ae9-d730-417f-88ff-143d0d4c20d6",
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"metadata": {},
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"outputs": [],
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"source": [
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"# # To add a custom legend to the map, uncomment the following code and modify the legend dictionary.\n",
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"# legend_dict = {\n",
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"# '11 Open Water': '466b9f',\n",
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"# '12 Perennial Ice/Snow': 'd1def8',\n",
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"# '21 Developed, Open Space': 'dec5c5',\n",
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"# '22 Developed, Low Intensity': 'd99282',\n",
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"# '23 Developed, Medium Intensity': 'eb0000',\n",
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"# '24 Developed High Intensity': 'ab0000',\n",
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"# '31 Barren Land (Rock/Sand/Clay)': 'b3ac9f',\n",
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"# '41 Deciduous Forest': '68ab5f',\n",
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"# '42 Evergreen Forest': '1c5f2c',\n",
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"# '43 Mixed Forest': 'b5c58f',\n",
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"# '51 Dwarf Scrub': 'af963c',\n",
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"# '52 Shrub/Scrub': 'ccb879',\n",
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"# '71 Grassland/Herbaceous': 'dfdfc2',\n",
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"# '72 Sedge/Herbaceous': 'd1d182',\n",
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"# '73 Lichens': 'a3cc51',\n",
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"# '74 Moss': '82ba9e',\n",
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"# '81 Pasture/Hay': 'dcd939',\n",
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"# '82 Cultivated Crops': 'ab6c28',\n",
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"# '90 Woody Wetlands': 'b8d9eb',\n",
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"# '95 Emergent Herbaceous Wetlands': '6c9fb8'\n",
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"# }\n",
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"# Map.add_legend(legend_title=\"NLCD Land Cover Classification\", legend_dict=legend_dict)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "44c16a8e-7d13-4e46-bfaf-12178aa1b0be",
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"metadata": {},
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"outputs": [],
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"source": [
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"# # Print the list of system ids of all available NLCD images.\n",
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"# dataset.aggregate_array(\"system:id\").getInfo()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "a49fbecc-b0bf-4010-83b1-8628f5b05459",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Select the seven NLCD epoches after 2000.\n",
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"years = ['2001', '2004', '2006', '2008', '2011', '2013', '2016', '2019']"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "cf361b54",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Get an NLCD image by year.\n",
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"def getNLCD(year):\n",
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" # Import the NLCD collection.\n",
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" dataset = ee.ImageCollection('USGS/NLCD_RELEASES/2019_REL/NLCD')\n",
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"\n",
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" # Filter the collection by year.\n",
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" nlcd = dataset.filter(ee.Filter.eq('system:index', year)).first()\n",
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" \n",
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" # Select the land cover band.\n",
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" landcover = nlcd.select('landcover');\n",
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" return landcover"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "6c0bbf8a-d4c9-402e-b0ff-b53f14d836bf",
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"metadata": {},
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"outputs": [],
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"source": [
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"## Create an NLCD image collection for the selected years.\n",
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"collection = ee.ImageCollection(ee.List(years).map(lambda year: getNLCD(year)))"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "3dcd6df2",
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"metadata": {},
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"outputs": [],
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"source": [
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"# # Print the list of system ids of selected NLCD images.\n",
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"# collection.aggregate_array('system:id').getInfo()"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "0a5eac53",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Create a list of labels to populate the dropdown list. \n",
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"labels = [f'NLCD {year}' for year in years]\n",
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"# labels"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"id": "78e89ca5",
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"metadata": {},
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"outputs": [],
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"source": [
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"# Add a split-panel map for visualizing NLCD land cover change.\n",
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"Map.ts_inspector(left_ts=collection, right_ts=collection, left_names=labels, right_names=labels)\n",
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"# Map"
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.10.8"
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},
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"toc": {
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"base_numbering": 1,
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"nav_menu": {},
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"number_sections": true,
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"sideBar": true,
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"skip_h1_title": false,
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"title_cell": "Table of Contents",
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"title_sidebar": "Contents",
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"toc_cell": false,
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"toc_position": {},
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"toc_section_display": true,
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"toc_window_display": false
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}
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