Science Center Objects

LCMAP offers a suite of 10 annual data products that depict land cover and spectral change in the conterminous United States. The products are created using the Landsat Analysis Ready Data (ARD) and a Continuous Change Detection and Classification (CCDC) algorithm and are designed to inform and compliment one another.

The first LCMAP product suite release, Collection 1, will cover calendar years 1985-2017 at 30-meter resolution. Annual releases of new data will follow.

Click here for detailed product descriptions

Color image of land cover map of Conterminous United States

Map of Primary Land Cover for the Conterminous United States (CONUS) from the USGS Land Change Monitoring, Assessment, and Projection initiative. 

LAND COVER PRODUCTS

1. Primary Land Cover

Description: Land cover classification consisting of nine general land cover types

File Short Name: LCPRI

Note: Classes are Developed, Cropland, Tree Cover, Grass/Shrub, Wetland, Water, Ice/Snow, Barren (click here for detailed class descriptions)

2. Secondary Land Cover

Description: Land cover classification consisting of nine general land cover types

File Short Name: LCSEC 

Note: Alternative cover with the second-highest algorithmic probability. Same classes as primary land cover

3. Primary Land Cover Confidence

Description: A measure of confidence in the primary land cover class designation

File Short Name: LCPCONF 

Note: Measure from 0 to 100; higher values imply higher levels of confidence

4. Secondary Land Cover Confidence

Description: A measure of confidence in the secondary land cover class designation

File Short Name: LCSCONF

Note: Measure from 0 to 100; higher values imply higher levels of confidence

5. Annual Land Cover Change

Description: Indictor of thematic land cover change that has occurred from the prior year to the current year (in other words, From:To land cover)

File Short Name: LCACHG

Note: Categories that indicate two land cover states, the prior year land cover and the current year land cover

LAND SURFACE CHANGE PRODUCTS

1. Time of Spectral Change

Description: The day that a spectral change was detected for a given year

File Short Name: SCTIME

Note: Provides data indicating the location and timing of spectral breaks

2. Change Magnitude

Description: A measure of the spectral magnitude of the change found within a given year

File Short Name: SCMAG

Note: Higher values may indicate different types of change

3. Time Since Last Change

Description: The cumulative number of days since the last spectral change occurred as of July 1 of the given year 

File Short Name: SCLAST

Note: Provides an indication of how long a location has been in its current state

4. Spectral Stability Period

Description: A measure of the amount of time in days that a pixel has been spectrally stable

File Short Name: SCSTAB

ote: Provides information of the frequency of land surface change

5. Spectral Model quality

Description: Characterization of time series model quality as it relates to model input data and model fit

File Short Name: SCMQA

Note: Provides a spatial measure for interpreting LCMAP product results

Primary Land Cover Class Descriptions

Developed Areas of intensive use with much of the land covered with structures (e.g. high-density residential, commercial, industrial, mining, or transportation), or less intensive uses where the land cover matrix includes vegetation, bare ground, and structures (e.g. low-density residential, recreational facilities, cemeteries, transportation/utility corridors, etc.), including any land functionality related to the developed or built-up activity.
Cropland Land in either a vegetated or unvegetated state used in production of food, fiber, and fuels. This includes cultivated and uncultivated croplands, hay lands, orchards, vineyards, and confined livestock operations. Forest plantations are considered as forests or woodlands (Tree Cover class) regardless of the use of the wood products.
Grass/Shrub Land predominantly covered with shrubs and perennial or annual natural and domesticated grasses (e.g. pasture), forbs, or other forms of herbaceous vegetation. The grass and shrub cover must comprise at least 10% of the area and tree cover is less than 10% of the area.
Tree Cover Tree-covered land where the tree cover density is greater than 10%. Cleared or harvested trees (i.e. clearcuts) will be mapped according to current cover (e.g. Barren, Grass/Shrub).
Water Areas covered with water, such as streams, canals, lakes, reservoirs, bays, or oceans.
Wetland Lands where water saturation is the determining factor in soil characteristics, vegetation types, and animal communities. Wetlands are composed of mosaics of water, bare soil, and herbaceous or wooded vegetated cover.
Ice/Snow Land where accumulated snow and ice does not completely melt during the summer period (i.e. perennial ice/snow).
Barren Land comprised of natural occurrences of soils, sand, or rocks where less than 10% of the area is vegetated.