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schwehr/USGS_NLCD_RELEASES_2019_REL_NALCMS.jsonnet

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2023-Mar-31 NALCMS
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USGS_NLCD_RELEASES_2019_REL_NALCMS.jsonnet
local id = 'USGS/NLCD_RELEASES/2019_REL/NALCMS';
local subdir = 'USGS';
local version = '1';
local ee_const = import 'earthengine_const.libsonnet';
local ee = import 'earthengine.libsonnet';
local spdx = import 'spdx.libsonnet';
local units = import 'units.libsonnet';
local license = spdx.cc0_1_0;
local basename = std.strReplace(id, '/', '_');
local base_filename = basename + '.json';
local self_ee_catalog_url = ee_const.ee_catalog_url + basename;
{
// TODO(schwehr): Remove skip_indexing when the preview image is ready.
'gee:skip_indexing': true,
'gee:user_uploaded': true,
stac_version: ee_const.stac_version,
type: ee_const.stac_type.collection,
stac_extensions: [
ee_const.ext_eo,
ee_const.ext_sci,
ee_const.ext_ver,
],
id: id,
title: 'Land Cover of North America at 30 meters, 2020',
version: '1',
'gee:type': ee_const.gee_type.image,
description: |||
The 2020 North American Land Cover 30-meter dataset was produced as part of
the North American Land Change Monitoring System (NALCMS), a trilateral
effort between Natural Resources Canada, the United States Geological
Survey, and three Mexican organizations including the National Institute of
Statistics and Geography (Instituto Nacional de Estadística y Geografía),
National Commission for the Knowledge and Use of the Biodiversity (Comisión
Nacional Para el Conocimiento y Uso de la Biodiversidad), and the National
Forestry Commission of Mexico (Comisión Nacional Forestal). The
collaboration is facilitated by the Commission for Environmental
Cooperation, an international organization created by the Canada, Mexico,
and United States governments under the North American Agreement on
Environmental Cooperation to promote environmental collaboration between the
three countries.
The general objective of NALCMS is to devise, through collective effort, a
harmonized multi-scale land cover monitoring approach which ensures high
accuracy and consistency in monitoring land cover changes at the North
American scale and which meets each country’s specific requirements.
This 30-meter dataset of North American Land Cover reflects land cover
information for 2020 from Mexico and Canada, 2019 over the conterminous
United States and 2021 over Alaska. Each country developed its own
classification method to identify Land Cover classes and then provided an
input layer to produce a continental Land Cover map across North America.
Canada, Mexico, and the United States developed their own 30-meter land
cover products; see specific sections on data generation below.
The main inputs for image classification were 30-meter Landsat 8 Collection
2 Level 1 data in the three countries (Canada, the United States and
Mexico). Image selection processes and reduction to specific spectral bands
varied among the countries due to study-site-specific requirements. While
Canada selected most images from the year 2020 with a few from 2019 and
2021, the Conterminous United States employed mainly images from 2019, while
Alaska land cover maps are mainly based on the use of images from 2021. The
land cover map for Mexico was based on land cover change detection between
2015 and 2020 Mexico Landsat 8 mosaics.
In order to generate a seamless and consistent land cover map of North
America, national maps were generated for Canada by the CCRS; for Mexico by
CONABIO, INEGI, and CONAFOR; and for the United States by the USGS. Each
country chose their own approaches, ancillary data, and land cover mapping
methodologies to create national datasets. This North America dataset was
produced by combining the national land cover datasets. The integration of
the three national products merged four Land Cover map sections, Alaska,
Canada, the conterminous United States and Mexico.
See also:
* Natural Resources Canada has North American Land Cover information
available online at
[https://open.canada.ca/data/en/dataset/ee1580ab-a23d-4f86-a09b-79763677eb47](
https://open.canada.ca/data/en/dataset/ee1580ab-a23d-4f86-a09b-79763677eb47)
* The National Commission for the Knowledge and Use of Biodiversity has
North American Land Cover information available online at
[https://www.biodiversidad.gob.mx/monitoreo/cobertura-suelo](https://www.biodiversidad.gob.mx/monitoreo/cobertura-suelo)
* The U.S. Geological Survey has North American Land Cover information
available online at [www.mrlc.gov](https://www.mrlc.gov)
|||,
license: license.id,
links: ee.standardLinks(subdir, id),
keywords: [
// 'land_cover',
// 'land_surface',
// 'land_use',
'landcover',
'landsat',
'nlcd',
// 'north_america',
'reflectance',
// 'remote_sensing',
],
providers: [
ee.producer_provider(
'The Commission for Environmental Cooperation (CEC)',
'http://www.cec.org/'),
ee.host_provider(self_ee_catalog_url),
],
extent: ee.extent(
-175, 14, -50, 84,
'2019-01-01T00:00:00Z',
'2021-12-31T00:00:00Z'),
'gee:interval': {
type: 'cadence',
unit: 'year',
interval: 1,
},
summaries: {
gsd: [30],
'eo:bands': [
{
name: 'landcover',
description: |||
Land cover classification grid cell value. Values are categorized into the following.
[Product Legend](https://www.mrlc.gov/sites/default/files/inline-images/2005_nalcms_large_0.jpg).
The classes in the 2020 product legend are given below.
|||,
'gee:classes': [
{
value: 1,
// TODO(griebel) very dark green
color: '1a200e',
description: |||
Temperate or sub-polar needleleaf forest. Forests generally taller
than three meters and more than 20 percent of total vegetation
cover. This type occurs across the northern United States, Canada,
and mountainous zones of Mexico. The tree crown cover contains at
least 75 percent of needleleaved species.
|||,
},
{
value: 2,
// TODO(griebel) army green
color: '4b5320',
description: |||
Sub-polar taiga needleleaf forest. Forest and woodlands with trees
generally taller than three meters and more than 5 percent of
total vegetation cover with shrubs and lichens commonly present in
the understory. The tree crown cover contains at least 75 percent
of needleleaved species. This type occurs across Alaska and
northern Canada and may consist of treed muskeg or
wetlands. Forest canopies are variable and often sparse, with
generally greater tree cover in the southern latitude parts of the
zone than the north.
|||,
},
{
value: 3,
// TODO(griebel) dark green
color: '222b13',
description: |||
Tropical or sub-tropical broadleaf evergreen forest. Forests
generally taller than five meters and more than 20 percent of
total vegetation cover. These occur in the southern United States
and Mexico. These forests have greater than 75 percent of tree
crown cover represented by evergreen species.
|||,
},
{
value: 4,
color: '68ab5f',
description: |||
Tropical or sub-tropical broadleaf deciduous forest. Forests
generally taller than five meters and more than 20 percent of
total vegetation cover. These occur in the southern United States
and Mexico. These forests have greater than 75 percent of tree
crown cover represented by deciduous species.
|||,
},
{
value: 5,
color: 'b5c58f',
description: |||
Temperate or sub-polar broadleaf deciduous forest. Forests
generally taller than three meters and more than 20 percent of
total vegetation cover. These occur in the northern United States,
Canada and mountainous zones of Mexico. These forests have
greater than 75 percent of tree crown cover represented by
deciduous species.
|||,
},
{
value: 6,
color: '1c5f2c',
description: |||
Mixed forest. Forests generally taller than three meters and more
than 20 percent of total vegetation cover. Neither needleleaf nor
broadleaf tree species occupy more than 75 percent of total tree
cover but are co-dominant.
|||,
},
{
value: 7,
// TODO(griebel) olive green
color: '556b2f',
description: |||
Tropical or sub-tropical shrubland. Areas dominated by woody
perennial plants with persistent woody stems less than five meters
tall and typically greater than 20 percent of total
vegetation. This class occurs across the southern United States
and Mexico.
|||,
},
{
value: 8,
color: 'dec5c5',
description: |||
Temperate or sub-polar shrubland. Areas dominated by woody
perennial plants with persistent woody stems less than three
meters tall and typically greater than 20 percent of total
vegetation. This class occurs across the northern United States,
Canada and highlands of Mexico.
|||,
},
{
value: 9,
color: 'dcd939',
description: |||
Tropical or sub-tropical grassland. Areas dominated by graminoid
or herbaceous vegetation generally accounting for greater than 80
percent of total vegetation cover. These areas are not subject to
intensive management such as tilling but can be utilized for
grazing. This class occurs across the southern United States and
Mexico.
|||,
},
{
value: 10,
color: 'ccb879',
description: |||
Temperate or sub-polar grassland. Areas dominated by graminoid or
herbaceous vegetation, generally accounting for greater than 80
percent of total vegetation cover. These areas are not subject to
intensive management such as tilling but can be utilized for
grazing. This class occurs across Canada, United States and
highlands of Mexico.
|||,
},
{
value: 11,
color: 'af963c',
description: |||
Sub-polar or polar shrubland-lichen-moss. Areas dominated by dwarf
shrubs with lichen and moss typically accounting for at least 20
percent of total vegetation cover. This class occurs across
northern Canada and Alaska.
|||,
},
{
value: 12,
color: 'd1d182',
description: |||
Sub-polar or polar grassland-lichen-moss. Areas dominated by
grassland with lichen and moss typically accounting for at least
20 percent of total vegetation cover. This class occurs across
northern Canada and Alaska.
|||,
},
{
value: 13,
color: '82ba9e',
description: |||
Sub-polar or polar barren-lichen-moss. Areas dominated by a
mixture of bare areas with lichen and moss that typically account
for at least 20 percent of total vegetation cover. This class
occurs across northern Canada.
|||,
},
{
value: 14,
color: 'a3cc51',
description: |||
Wetland. Areas dominated by perennial herbaceous and woody wetland
vegetation which is influenced by the water table at or near
surface over extensive periods of time. This includes marshes,
swamps, bogs, mangroves, etc., either coastal or inland where
water is present for a substantial period annually.
|||,
},
{
value: 15,
color: 'ab6c28',
description: |||
Cropland. Areas dominated by intensively managed crops. These
areas typically require human activities for their
maintenance. This includes areas used for the production of annual
crops, such as corn, soybeans, wheat, maize, vegetables, tobacco,
cotton, etc.; perennial grasses for grazing; and woody crops such
as orchards and vineyards. Crop vegetation accounts for greater
than 20 percent of total vegetation. This class does not represent
natural grasslands used for light to moderate grazing.
|||,
},
{
value: 16,
color: 'b8d9eb',
description: |||
Barren lands. Areas characterized by bare rock, gravel, sand,
silt, clay, or other earthen material, with little or no "green"
vegetation present regardless of its inherent ability to support
life. Generally, vegetation accounts for less than 10 percent of
total cover.
|||,
},
{
value: 17,
color: 'ab0000',
description: |||
Urban and built-up. Areas that contain at least 30 percent or
greater urban constructed materials for human activities (cities,
towns, transportation etc.)
|||,
},
{
value: 18,
color: '466b9f',
description: |||
Water. Areas of open water, generally with less than 25 percent
cover of non-water cover types. This class refers to areas that
are consistently covered by water.
|||,
},
{
value: 19,
color: 'd1def8',
description: |||
Snow and ice. Areas characterized by a perennial cover of ice
and/or snow, generally greater than 25 percent of total cover.
|||,
},
],
}
],
landcover: {
minimum: 1,
maximum: 19,
'gee:estimated_range': false,
},
'gee:visualizations': [
{
display_name: 'landcover',
lookat: {
lat: 38,
lon: -114,
zoom: 6,
},
image_visualization: {
band_vis: {
min: [
0,
],
max: [
100,
],
palette: [
'000000',
'f9e8b7',
'f7e3ac',
'f0dfa3',
'eedf9c',
'eada91',
'e8d687',
'e0d281',
'ddd077',
'd6cc6d',
'd3c667',
'd0c55e',
'cfc555',
'c6bd4f',
'c4ba46',
'bdb83a',
'bbb534',
'b7b02c',
'b0ad1f',
'adac17',
'aaaa0a',
'a3a700',
'9fa700',
'9aa700',
'92a700',
'8fa700',
'87a700',
'85a700',
'82aa00',
'7aaa00',
'77aa00',
'70aa00',
'6caa00',
'67aa00',
'5fa700',
'57a700',
'52a700',
'4fa700',
'4aa700',
'42a700',
'3ca700',
'37a700',
'37a300',
'36a000',
'369f00',
'349d00',
'339900',
'339900',
'2f9200',
'2d9100',
'2d8f00',
'2c8a00',
'2c8800',
'2c8500',
'2c8400',
'2b8200',
'297d00',
'297a00',
'297900',
'277700',
'247400',
'247000',
'29700f',
'2c6d1c',
'2d6d24',
'336d2d',
'366c39',
'376c44',
'396a4a',
'396a55',
'3a6a5f',
'3a696a',
'396774',
'3a6782',
'39668a',
'376292',
'34629f',
'2f62ac',
'2c5fb7',
'245ec4',
'1e5ed0',
'115cdd',
'005ae0',
'0057dd',
'0152d6',
'0151d0',
'014fcc',
'014ac4',
'0147bd',
'0144b8',
'0142b0',
'0141ac',
'013da7',
'013aa0',
'01399d',
'013693',
'013491',
'012f8a',
'012d85',
'012c82',
'01297a'
],
bands: [
'landcover',
],
},
},
},
],
},
'sci:citation': |||
North American Land Change Monitoring System download webpage.
[www.cec.org/north-american-land-change-monitoring-system](http://www.cec.org/north-american-land-change-monitoring-system/)
|||,
'gee:terms_of_use': |||
This work was authored as part of the Contributor's official duties as an
Employee of the United States Government and is therefore a work of the
United States Government. In accordance with 17 U.S.C. 105, no copyright
protection is available for such works under U.S. Law. This is an Open
Access article that has been identified as being free of known restrictions
under copyright law, including all related and neighboring rights
(https://creativecommons.org/publicdomain/mark/1.0/). You can copy, modify,
distribute and perform the work, even for commercial purposes, all without
asking permission.
|||,
}
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