National Land Cover Database 2011 (NLCD2011) Statistics | Multi-Resolution Land Characteristics (MRLC) Consortium

Conterminous United States

NLCD 2011 Pie Chart

A generalized summary of the main NLCD2011 land cover classes for the conterminous United States (Note: Some NLCD2011 land cover classes have been grouped for display purposes. A detailed conterminous United States class proportions are described in the table below).

NLCD2011 Land Cover Class for the conterminous United States

Percentage

11. Water

5.22

12. Perennial Ice Snow

0.02

21. Developed, Open Space

3.26

22. Developed, Low Intensity

1.46

23. Developed, Medium Intensity

0.68

24. Developed High Intensity

0.22

31. Bare Rock/Sand/Clay

1.23

41. Deciduous Forest

10.84

42. Evergreen Forest

11.56

43. Mixed Forest

2.00

52. Shrub/Scrub

21.61

71. Grasslands/Herbaceous

14.56

81. Pasture/Hay

6.65

82. Cultivated Crops

15.51

90. Woody Wetlands

3.87

95. Emergent Herbaceous Wetlands

1.30

Total

100.00%

A detailed description of all NLCD2011 land cover class proportions across the conterminous United States. Note: This table is for illustrative purposes only, we encourage you to download the most recent NLCD2011 data file to complete detailed land cover analysis.

Alaska

NLCD 2011 (AK) Pie Chart

A generalized summary of the main NLCD2011 land cover classes for Alaska. (Note: Some NLCD2011 land cover classes have been grouped for display purposes. A more detailed Alaska class proportions are described in the table below).

NLCD2011 Land Cover Class for Alaska	Percentage
11. Open Water	14.16
12. Perennial Ice Snow	4.11
21. Developed, Open Space	0.02
22. Developed, Low Intensity	0.06
23. Developed, Medium Intensity	0.01
24. Developed High Intensity	0.00
31. Bare Rock/Sand/Clay	7.78
41. Deciduous Forest	3.24
42. Evergreen Forest	13.75
43. Mixed Forest	3.27
51. Dwarf Shrub	17.10
52. Shrub/Scrub	22.57
71. Grasslands/Herbaceous	1.72
72. Sedge/Herbaceous	5.71
74. Moss	0.03
81. Pasture/Hay	0.00
82. Cultivated Crops	0.02
90. Woody Wetlands	3.48
95. Emergent Herbaceous Wetlands	2.98
Total	100.00%

A detailed description of all NLCD2011 land cover class proportions across Alaska. Note: This table is for illustrative purposes only, we encourage you to download the most recent NLCD2011 data file to complete a more detailed land cover analysis.

NLCD 2021 Land Cover

NLCD 2021 Now Available

Published Jul 20, 2023

The U.S. Geological Survey (USGS), in association with the Multi-Resolution Land Characteristics (MRLC) Consortium, is pleased to announce the completion and release of the latest epoch of the National Land Cover Database (NLCD) for the conterminous U.S.—NLCD 2021. The MRLC, a consortium of federal agencies who coordinate and generate consistent and relevant land cover information at the national scale for a wide variety of environmental, land management, and modeling applications, have been providing the scientific community with detailed land cover products for more than 30 years. Over that time, NLCD has been one of the most widely used geospatial datasets in the U.S., serving as a basis for understanding the Nation’s landscapes in thousands of studies and applications, trusted by scientists, land managers, students, city planners, and many more as a definitive source of U.S. land cover.

RCMAP release thumbnail

RCMAP 1985-2021 Fractional Component Time-Series Now Available

Published Dec 01, 2022

The U.S. Geological Survey (USGS), in collaboration with the MRLC consortium and Bureau of Land Management (BLM), is pleased to announce the availability of a new generation of Rangeland, Condition, Monitoring, Assessment, and Projection (RCMAP) fractional component data spanning a 1985-2021 time-series. The new time-series includes yearly cover predictions for 9 components: shrub, sagebrush, non-sagebrush shrub, herbaceous, annual herbaceous, perennial herbaceous, litter, bare ground, and new to this version, tree cover. Trends statistics of the new time-series will be available by Jan 2023. Data are available for download and on the rangelands viewer. The new generation of data update previously released 1985-2020 RCMAP data and are not designed to be backwards compatible (1985-2020 cover predictions are different between versions). While users are encouraged to use the newest generation of data, the previous versions of the time-series data are archived.

Release of RCMAP Time-Series Trends Statistics

Release of RCMAP Time-Series Trends Statistics

Published Aug 02, 2021

RCMAP has released temporal trends for the 1985-2020 fractional component cover time-series. Temporal patterns in each RCMAP component were evaluated with two approaches, 1) linear trends and 2) a structural change method using a temporal moving window to detect “breaks” and “stable states” in pixel values. The structural change method partitions the time-series into segments of similar slope values, with statistically significant break-points indicating perturbations to the prior trajectory. We provide the following statistics: 1) for each component, each year, the presence/absence of breaks, 2) the slope, p-value, and standard error of the segment occurring in each year, 3) the overall model R2 (quality of model fit to the temporal profile), and 4) an index, Total Change Intensity, reflecting the total amount of change occurring across components in that pixel.

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