NDHUB.LANDCLASS_NLC_2011

SDE Raster Dataset

Tags
Land cover, U.S., GIS, ImageryBaseMapEarthCover, U.S. Geological Survey (USGS), Image processing, US, United States, digital spatial data

Description

The National Land Cover Database products are created through a cooperative project conducted by the Multi-Resolution Land Characteristics (MRLC) Consortium. The MRLC Consortium is a partnership of federal agencies (www.mrlc.gov), consisting of the U.S. Geological Survey (USGS), the National Oceanic and Atmospheric Administration (NOAA), the U.S. Environmental Protection Agency (EPA), the U.S. Department of Agriculture (USDA), the U.S. Forest Service (USFS), the National Park Service (NPS), the U.S. Fish and Wildlife Service (FWS), the Bureau of Land Management (BLM) and the USDA Natural Resources Conservation Service (NRCS). The success of NLCD over nearly two decades is credited to the continuing collaborative spirit of the agencies that make up the MRLC. NLCD 2011 is the most up-to-date iteration of the National Land Cover Database, the definitive Landsat-based, 30-meter resolution land cover database for the Nation. The data in NLCD 2011 are completely integrated with NLCD 2001 (2011 Edition) and NLCD 2006 (2011 Edition). For NLCD 2011, there are 5 primary data products: 1) NLCD 2011 Land Cover; 2) NLCD 2006/2011 Land Cover Change Pixels labeled with the 2011 land cover class; 3) NLCD 2011 Percent Developed Imperviousness; 4) NLCD 2006/2011 Percent Developed Imperviousness Change Pixels; and 5) NLCD 2011 Tree Canopy Cover provided by an MRLC partner - the U.S.D.A. Forest Service Remote Sensing Applications Center. In addition, ancillary metadata includes the NLCD 2011 Path/Row Index vector file showing the footprint of Landsat scenes and change analysis pairs used to derive 2006/2011 spectral change. All Landsat scene acquisition dates are included in the attribute table. Also, as part of the NLCD 2011 project, NLCD 2001 and 2006 land cover and impervious data products have been revised and reissued (2011 Edition) to provide full compatibility with the new NLCD 2011 products. NLCD Tree Canopy Cover was created using MRLC mapping zones from NLCD 2001 (see Tree Canopy Cover metadata for additional detail). All other NLCD 2011 products were created on a path/row basis and mosaicked to create a seamless national product. Questions about the NLCD 2011 land cover product can be directed to the NLCD 2011 land cover mapping team at the USGS/EROS, Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov.


Summary

The goal of this project is to provide the Nation with complete, current and consistent public domain information on its land use and land cover.

Credits

U.S. Geological Survey

Use limitations

Metadata 

Topics and Keywords 

Themes or categories of the resource  imageryBaseMapsEarthCover


*Content type  Downloadable Data


Theme keywords  ImageryBaseMapEarthCover

Thesaurus
Title ISO 19115 Category




Theme keywords  Land cover, GIS, U.S. Geological Survey (USGS), Image processing, digital spatial data

Theme keywords  U.S., US, United States

Thesaurus
Title U.S. Department of Commerce, 1995, (Countries, dependencies, areas of special sovereignty, and their principal administrative divisions, Federal Information Processing Standard 10-4): Washington, D.C., National Institute of Standards and Technology




Citation 

*Title NDHUB.LANDCLASS_NLC_2011
Publication date 2014-03-31


Edition 2011


Presentation formats  digital map
FGDC geospatial presentation format  remote-sensing image


Series
Name None
Issue None

Other citation details
References: (1) Jin, S., Yang, L., Danielson, P., Homer, C., Fry, J., and Xian, G. 2013. A comprehensive change detection method for updating the National Land Cover Database to circa 2011. Remote Sensing of Environment, 132: 159 – 175. (2) Xian, G., Homer, C., Dewitz, J., Fry, J., Hossain, N., and Wickham, J., 2011. The change of impervious surface area between 2001 and 2006 in the conterminous United States. Photogrammetric Engineering and Remote Sensing, Vol. 77(8): 758-762. (3) Coulston, J. W., Moisen, G. G., Wilson, B. T., Finco, M. V., Cohen, W. B., and Brewer, C. K. 2012. Modeling percent tree canopy cover: a pilot study. Photogrammetric Engineering & Remote Sensing 78(7): 715-727. The USGS acknowledges the support of USGS and contractor NLCD 2011 Land Cover Mapping Teams in development of data for this map.



Citation Contacts 

Responsible party
Organization's name U.S. Geological Survey
Contact's role  originator


Responsible party
Organization's name U.S. Geological Survey
Contact's role  publisher


Contact information
Address
Delivery point Sioux Falls, SD



Resource Details 

Dataset languages  English (UNITED STATES)


Status  under development
Spatial representation type* grid


Supplemental information
*Processing environment Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959


Credits
U.S. Geological Survey

*Name NDHUB.LANDCLASS_NLC_2011

Extents 

Extent
Geographic extent
Bounding rectangle
West longitude -130.232828
East longitude -63.672192
South latitude 21.742308
North latitude 52.877264

Extent
Description
ground condition

Temporal extent
Beginning date
Indeterminate date 200040409
Ending date 2011-11-11

Extent
Geographic extent
Bounding rectangle
Extent type  Extent used for searching
*West longitude -104.543566
*East longitude -96.370172
*North latitude 49.380230
*South latitude 45.539989
*Extent contains the resource Yes

Extent in the item's coordinate system
*West longitude -630910.128683
*East longitude -28810.128683
*South latitude 2532630.108633
*North latitude 2930010.108633
*Extent contains the resource Yes

Resource Points of Contact 

Point of contact
Organization's name U.S. Geological Survey
Contact's position Customer Services Representative
Contact's role  point of contact


Contact information
Phone
Voice 605/594-6151
Fax 605/594-6589

Address
Type both
Delivery point USGS/EROS
Delivery point 47914 252nd Street
City Sioux Falls
Administrative area SD
Postal code 57198-0001
Country US
e-mail addresscustserv@usgs.gov

Hours of service
0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)

Contact instructions
The USGS point of contact is for questions relating to the data display and download from this web site. For questions regarding data content and quality, refer to: http://www.mrlc.gov/mrlc2k.asp or email: mrlc@usgs.gov



Resource Constraints 

Legal constraints
Limitations of use
Although these data have been processed successfully on a computer system at the USGS, no warranty expressed or implied is made by the USGS regarding the use of the data on any other system, nor does the act of distribution constitute any such warranty. Data may have been compiled from various outside sources. Spatial information may not meet National Map Accuracy Standards. This information may be updated without notification. The USGS shall not be liable for any activity involving these data, installation, fitness of the data for a particular purpose, its use, or analyses results.

Security constraints
Classification  unclassified
Classification system None


Additional restrictions
N/A



Spatial Reference 

ArcGIS coordinate system
*Type Projected
*Geographic coordinate reference GCS_North_American_1983
*Projection Albers_Conical_Equal_Area
*Coordinate reference details
Projected coordinate system
X origin -16901100
Y origin -6972200
XY scale 266467840.99085236
Z origin -100000
Z scale 10000
M origin -100000
M scale 10000
XY tolerance 0.001
Z tolerance 0.00020000000000000001
M tolerance 0.00020000000000000001
High precision true
Well-known text PROJCS["Albers_Conical_Equal_Area", GEOGCS["GCS_North_American_1983", DATUM["D_North_American_1983", SPHEROID["GRS_1980", 6378137.0, 298.257222101]], PRIMEM["Greenwich", 0.0], UNIT["Degree", 0.0174532925199433]], PROJECTION["Albers"], PARAMETER["false_easting", 0.0], PARAMETER["false_northing", 0.0], PARAMETER["central_meridian", -96.0], PARAMETER["standard_parallel_1", 29.5], PARAMETER["standard_parallel_2", 45.5], PARAMETER["latitude_of_origin", 23.0], UNIT["Meter", 1.0]]

Reference system identifier
*Value 0


Spatial Data Properties 

Scale Range

Maximum (zoomed in)  1:5,000
Minimum (zoomed out)  1:150,000,000
Georectified Grid
Number of dimensions 2


Axis dimensions properties
Dimension type  row (y-axis)
Dimension size 104424

Axis dimensions properties
Dimension type  column (x-axis)
Dimension size 161190

Axis dimensions properties
Dimension type  vertical (z-axis)
Dimension size 1

Cell geometry  area




Data Quality 

Scope of quality information
Resource level  dataset




Data quality report - Conceptual consistency
Measure description
The NLCD 2011 final seamless products include: 1) NLCD 2011 Land Cover; 2) NLCD 2011 Percent Developed Imperviousness; 3) NLCD 2006/2011 Change Pixels labeled with the 2011 land cover class; 4) NLCD 2006/2011 Percent Developed Imperviousness Change; and 5)NLCD 2011 Tree Canopy Cover.





Data quality report - Completeness omission
Measure description
This NLCD product is the version dated March 31, 2014.





Data quality report - Quantitative attribute accuracy
Measure description
A formal accuracy assessment has not been conducted for NLCD 2011 Land Cover, 2006-2011 Land Cover Change, NLCD 2011 Percent Developed Imperviousness or 2006-2011 Percent Developed Imperviousness Change products. For Canopy attribute accuracy, refer to Canopy metadata.



Quantitative test results
Value Unknown


Evaluation method
This document and the described land cover map are considered "provisional" until a formal accuracy assessment is completed. The U.S. Geological Survey can make no guarantee as to the accuracy or completeness of this information, and it is provided with the understanding that it is not guaranteed to be correct or complete. Conclusions drawn from this information are the responsibility of the user.





Data quality report - Absolute external positional accuracy
Dimension horizontal


Measure description
N/A





Data quality report - Absolute external positional accuracy
Dimension vertical


Measure description
N/A





Lineage 

Process step
When the process occurred
Indeterminate date unknown
Description
Landsat image selection and preprocessing. For NLCD 2011 change analysis, two, two-date pairs of Landsat scenes were selected for each path/row to represent ground conditions in circa 2006 and 2011. One additional circa 2011 scene was selected to enhance modeling results for land cover labeling. In selecting the 5 scenes, the temporal range of the imagery was restricted to reduce the impact of seasonal and phenological variation. A pre-processing step was performed to convert the digital number to top of atmosphere reflectance using procedures similar to those established for the NLCD 2001 mapping effort (Homer et al., 2004). Reflectance derivatives, including a tasseled-cap transformation and a 3-ratio index, were generated for each scene to use in the modeling process as independent variables. Where present, clouds and cloud shadows were digitized and masked. NLCD 2011 Percent Developed Imperviousness and Percent Developed Imperviousness Change Analysis. Because the four NLCD developed classes are derived from a percent imperviousness mapping product, an overview of steps required to update the NLCD 2001 imperviousness to reflect urban growth captured in 2006 era Landsat imagery is provided here (Xian et al., 2010). These same procedures were employed to produce NLCD 2011 Percent Developed Imperviousness and 2006-2011 Percent Developed Imperviousness Change. First, 2009 nighttime lights imagery from the NOAA Defense Meteorological Satellite Program (DMSP) was imposed on the NLCD 2006 impervious surface product to exclude low density imperviousness outside urban and suburban centers so that only imperviousness in urban core areas would be used in the training dataset. Two training datasets, one having a relatively larger urban extent and one having a smaller extent, were produced through imposing two different thresholds on city light imagery. Second, each of the two training datasets combined with 2006 Landsat imagery was separately applied using a regression tree (RT) algorithm to build up RT models. Two sets of RT models were then used to estimate percent imperviousness and to produce two 2006 synthetic impervious surfaces. Similarly, the same two training datasets were used with 2011 Landsat imagery to create two sets of RT models that produce two 2011 synthetic impervious surfaces. Third, the 2006 and 2011 synthetic impervious surface pairs were compared using both 2006 impervious surface products to retain 2006 impervious surface area (ISA) in the unchanged areas. The 2009 DMSP nighttime lights imagery was then employed to ensure that non-imperviousness areas were not included and that new impervious surfaces emerged in the city light extent. After this step, two 2011 intermediate impervious surfaces were produced. Finally, the two intermediate products and 2006 imperviousness were compared to remove false estimates in non-urban areas and generate a 2011 impervious surface estimate. Imperviousness threshold values used to derive the NLCD developed classes are: (Class 21) developed open space (imperviousness < 20%), (Class 22) low-intensity developed (imperviousness from 20 - 49%), (Class 23) medium intensity developed (imperviousness from 50 -79%), and (Class 24) high-intensity developed (imperviousness > 79%). To improve NLCD imperviousness the 2011 project included a process to reduce omission and commission error in NLCD 2001, 2006, and 2011 products. This activity was completed for urban areas in most of the eastern ½ of the conterminous United States. High resolution (one-meter ground sample distance) National Aerial Imagery Program (NAIP - http//fsa.usda.gov/FSA/) imagery was used to verify imperviousness. Using hand-edits imperviousness was removed from areas incorrectly identified as developed and added to areas where developed land cover was missed. A modeling process was implemented to add missed imperviousness changes to the correct era and to fill areas where developed was removed with an appropriate non-developed land cover class. These improvements were incorporated with the derived developed classes in all areas of imperviousness and land cover versions released with NLCD 2011 editions. Revised products, NLCD 2001 and NLCD 2006 Impervious (2011 Editions) and NLCD 2001-2006 Impervious Change Pixels (2011 Edition) are included as part of the NLCD 2011 product release. Land Cover Change Analysis. For the NLCD 2011 Land Cover Update, a variation of the Multi-Index Integrated Change Analysis (MIICA) used in NLCD 2006 spectral change analysis was refined to capture land cover disturbance and potential land cover change patterns for updating the National Land Cover Database 2011 (Jin et al. 2013). Four indices were integrated into one model to more accurately detect true spectral changes between two time periods. Within the model, normalized burn ratio (NBR), change vector (CV, Xian et al., 2009), relative change vector (RCV), and normalized difference vegetation index (NDVI) are calculated separately for the early date (circa 2006) and late date (circa 2011) scenes. The four pairs of indices for the two dates are differenced and then evaluated in a final model conditional statement that categorizes each pixel as either biomass increase, biomass decrease, or no change. For NLCD 2011, two image pairs of circa 2006 and circa 2011, ideally one leaf-on pair and one leaf-off pair are used interactively in each path/row. The integrated change result is clumped and sieved to produce a refined change/no-change mask used to identify potential change pixels that are then labeled with the NLCD 2011 class. NLCD 2011 Land Cover Classification. Land cover mapping protocols used during NLCD 2011 processing are similar to those used to label the NLCD 2001 product (Homer et al., 2004), but applied on a path/row basis instead of multiple path/row MRLC zones (Xian et al., 2009). Classification was achieved using decision tree modeling that employed a combination of Landsat imagery, reflectance derivatives, and ancillary data (independent variables) with training data points (dependent variable) collected from a refined version of the NLCD 2006 land cover product. Training points were randomly sampled and limited to those areas that were determined to be unchanged between 2006 and 2011 during the MIICA spectral change analysis process. Training data for pixels changed to developed land cover were not collected since the four classes in urban and sub-urban areas were mapped separately using a regression tree modeling method (described in the Imperviousness Change Analysis process steps above). Post classification modeling and hand-editing were used to further refine the decision tree output. Following classification, the 2011 land cover was masked with the change/no-change result (captured during the MIICA change analysis modeling) to extract a label for spectrally changed pixels. Labeled change pixels were then compared to the NLCD 2006 land cover base to exclude those pixels identified as spectral change, but classified with the same label as the corresponding 2006 pixel. NLCD 2011 percent developed impervious pixels, identified as changed, were extracted to NLCD developed class codes using NLCD 2011 legend thresholds for developed classes and added to the change pixel map. This intermediate change pixel product was generalized using the NLCD Smart Eliminate tool with the following minimum mapping units (mmu) applied: 1 acre (approximately 5 ETM+ 30 m pixel patch) for developed classes (class codes 21, 22, 23, and 24); 7.12 acres (approximately 32 ETM+ pixel patch) for agricultural classes (class codes 81 and 82); and 2.67 acres (approximately 12 ETM+ pixel patch) for all other classes (class codes 11, 12, 31, 41, 42, 43, 52, 71, 90, and 95). The smart eliminate aggregation program subsumes pixels from the single pixel level to the mmu pixel patch using a queens algorithm at doubling intervals. The algorithm consults a weighting matrix to guide merging of cover types by similarity, resulting in a product that preserves land cover logic as much as possible. During the NLCD 2011 analysis and modeling process, inconsistencies in the NLCD 2001 and 2006 land cover products were corrected with the revised products, NLCD 2001 and NLCD 2006 Land Cover (2011 Editions), included as part of the NLCD 2011 product release. NLCD 2011 Land Cover (Final Product). Additional processing steps were implemented to create the final NLCD 2011 land cover map. Individual path/row change pixel results were assembled to form an intermediate seamless national product. This seamless change pixel map was reviewed and edited to remove regional inconsistencies. Refined NLCD 2011 change pixels were then combined with the re-issued NLCD 2006 Land Cover Version (2011 Edition), and the resulting image was smart-eliminated to a 5-pixel mmu. This final step eliminated single pixels and patches less than 5 pixels in extent that appeared as a result of combining the separate images. NLCD 2011 Change Pixels (Final Product). A comparison of the NLCD 2006 (2011 Edition) base and the NLCD 2011 Land Cover was necessary to extract a final version of the NLCD 2011 Change Pixels. In a model, pixels that were labeled with the same land cover class code were removed and only those pixels that did not agree in the two classifications were retained as final NLCD 2011 Change Pixels. NLCD 2006/2011 Percent Developed Imperviousness Change. The NLCD 2006 Percent Developed Imperviousness (2011 Edition)and the NLCD 2011 Percent Developed Imperviousness were compared in a model to provide the user community with a layer that depicts imperviousness change between 2006 and 2011. Landsat data and ancillary data used for the land cover prediction - For a list of Landsat scene dates by path/row used in this project, please see: appendix3_nlcd2011_scene_list_by_path_row.txt Data Type of DEM composed of 1 band of Continuous Variable Type. Data Type of Slope composed of 1 band of Continuous Variable Type. Data Type of Aspect composed of 1 band of Categorical Variable Type. Data type of Position Index composed of 1 band of Continuous Variable Type. Data type of 3-ratio index composed of 3 bands of Continuous Variable Type.



Source data
Relationship to the process step used


Source citation
Alternate titles  Landsat ETM, Landsat TM, DEM, USGS/EROS






Source data
Relationship to the process step produced


Source citation
Alternate titles  USGS National Land Cover Database








Distribution 

Distributor
Contact information
Organization's name U.S. Geological Survey
Contact's position Customer Service Representative
Contact's role  distributor


Contact information
Phone
Voice 605/594-6151
TDD/TTY 605/594-6933
Fax 605/594-6589

Address
Type both
Delivery point 47914 252nd Street
Delivery point National Center, EROS
City Sioux Falls
Administrative area SD
Postal code 57198-0001
Country US
e-mail addresscustserv@usgs.gov

Hours of service
0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)

Contact instructions
The USGS point of contact is for questions relating to the data display and download from this web site. Questions about the NLCD 2011 Land Cover (2011 Edition) can be directed to the NLCD 2001 land cover mapping team at the National Center, EROS, Sioux Falls, SD (605) 594-6151 or mrlc@usgs.gov.



Available format
Name ERDAS
Version Imagine 9.3
Specification .img
Technical prerequisites ESRI ArcMap Suite and/or Arc/Info software, and supporting operating systems.


Ordering process
Terms and fees None
Turnaround time
Variable

Instructions
Contact Customer Services


Transfer options
Transfer size 1032


Online source
Locationhttp://www.mrlc.gov
Description  The URL http://www.mrlc.gov provides a download interface that allows for data downloads. The download page allows the customer to download a zipped file that can be saved on the customer's computer. The file can then be unzipped and imported into various user software applications.

Transfer options
Online source
Description  Downloadable data



Distribution format
*Name SDE Raster Dataset


Transfer options
Online source
Locationhttp://www.mrlc.gov

Fields 

Details for object NDHUB.SDE_VAT_138 
*Type Table
*Row count 15
Definition
NLCD Land Cover Layer

Definition source
National Land Cover Database



Field Blue
 
*Alias BLUE
*Data type Double
*Width 8
*Precision 38
*Scale 8
Field description
Blue color code for RGB. The value is arbitrarily assigned by the display software package, unless defined by user.

Description source
NLCD

Range of values
Minimum value 0
Maximum value 100
Units of measure Percentage
Measurement resolution 0.1



Field Count
 
*Alias COUNT
*Data type Double
*Width 8
*Precision 38
*Scale 8
Field description
A nominal integer value that designates the number of pixels that have each value in the file; histogram column in ERDAS Imagine raster attributes table

Description source
ESRI

Description of values
Integer





Field Value
 
*Alias VALUE
*Data type Integer
*Width 4
*Precision 10
*Scale 0
Field description
Land Cover Class Code Value.

Description source
NLCD Legend Land Cover Class Descriptions

List of values
Value 22
Description Developed, Low Intensity -Includes areas with a mixture of constructed materials and vegetation. Impervious surfaces account for 20-49 percent of total cover. These areas most commonly include single-family housing units.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 43
Description Mixed Forest - Areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. Neither deciduous nor evergreen species are greater than 75 percent of total tree cover.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 71
Description Grassland/Herbaceous - Areas dominated by grammanoid or herbaceous vegetation, generally greater than 80% of total vegetation. These areas are not subject to intensive management such as tilling, but can be utilized for grazing.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 21
Description Developed, Open Space - Includes areas with a mixture of some constructed materials, but mostly vegetation in the form of lawn grasses. Impervious surfaces account for less than 20 percent of total cover. These areas most commonly include large-lot single-family housing units, parks, golf courses, and vegetation planted in developed settings for recreation, erosion control, or aesthetic purposes.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 74
Description Moss - Alaska only areas dominated by mosses, generally greater than 80% of total vegetation.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 11
Description Open Water - All areas of open water, generally with less than 25% cover or vegetation or soil
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 72
Description Sedge/Herbaceous - Alaska only areas dominated by sedges and forbs, generally greater than 80% of total vegetation. This type can occur with significant other grasses or other grass like plants, and includes sedge tundra, and sedge tussock tundra.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 52
Description Shrub/Scrub - Areas dominated by shrubs; less than 5 meters tall with shrub canopy typically greater than 20% of total vegetation. This class includes true shrubs, young trees in an early successional stage or trees stunted from environmental conditions.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 81
Description Pasture/Hay - Areas of grasses, legumes, or grass-legume mixtures planted for livestock grazing or the production of seed or hay crops, typically on a perennial cycle. Pasture/hay vegetation accounts for greater than 20 percent of total vegetation.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 12
Description Perennial Ice/Snow - All areas characterized by a perennial cover of ice and/or snow, generally greater than 25% of total cover.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 31
Description Barren Land (Rock/Sand/Clay) - Barren areas of bedrock, desert pavement, scarps, talus, slides, volcanic material, glacial debris, sand dunes, strip mines, gravel pits and other accumulations of earthen material. Generally, vegetation accounts for less than 15% of total cover.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 90
Description Woody Wetlands - Areas where forest or shrub land vegetation accounts for greater than 20 percent of vegetative cover and the soil or substrate is periodically saturated with or covered with water.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 42
Description Evergreen Forest - Areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. More than 75 percent of the tree species maintain their leaves all year. Canopy is never without green foliage.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 41
Description Deciduous Forest - Areas dominated by trees generally greater than 5 meters tall, and greater than 20% of total vegetation cover. More than 75 percent of the tree species shed foliage simultaneously in response to seasonal change.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 24
Description Developed, High Intensity - Includes highly developed areas where people reside or work in high numbers. Examples include apartment complexes, row houses and commercial/industrial. Impervious surfaces account for 80 to 100 percent of the total cover.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 73
Description Lichens - Alaska only areas dominated by fruticose or foliose lichens generally greater than 80% of total vegetation.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 82
Description Cultivated Crops - Areas used for the production of annual crops, such as corn, soybeans, vegetables, tobacco, and cotton, and also perennial woody crops such as orchards and vineyards. Crop vegetation accounts for greater than 20 percent of total vegetation. This class also includes all land being actively tilled.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 23
Description Developed, Medium Intensity - Includes areas with a mixture of constructed materials and vegetation. Impervious surfaces account for 50-79 percent of the total cover. These areas most commonly include single-family housing units.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 51
Description Dwarf Scrub - Alaska only areas dominated by shrubs less than 20 centimeters tall with shrub canopy typically greater than 20% of total vegetation. This type is often co-associated with grasses, sedges, herbs, and non-vascular vegetation.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions


Value 95
Description Emergent Herbaceous Wetlands - Areas where perennial herbaceous vegetation accounts for greater than 80 percent of vegetative cover and the soil or substrate is periodically saturated with or covered with water.
Enumerated domain value definition source NLCD Legend Land Cover Class Descriptions




Field CLASS_NAME
 
*Alias CLASS_NAME
*Data type String
*Width 50
*Precision 0
*Scale 0




Field Red
 
*Alias RED
*Data type Double
*Width 8
*Precision 38
*Scale 8
Field description
Red color code for RGB. The value is arbitrarily assigned by the display software package, unless defined by user.

Description source
NLCD

Range of values
Minimum value 0
Maximum value 100
Units of measure Percentage
Measurement resolution 0.1



Field ObjectID
 
*Alias OBJECTID
*Data type OID
*Width 4
*Precision 10
*Scale 0
Field description
Internal feature number

Description source
ESRI

Description of values
Sequential unique whole numbers that are automatically generated.





Field Green
 
*Alias GREEN
*Data type Double
*Width 8
*Precision 38
*Scale 8
Field description
Green color code for RGB. The value is arbitrarily assigned by the display software package, unless defined by user.

Description source
NLCD

Range of values
Minimum value 0
Maximum value 100
Units of measure Percentage
Measurement resolution 0.1





Overview Description
Entity and Attribute Overview
Land Cover Class RGB Color Value Table



Entity and Attribute Detail Citation
Attributes defined by USGS and ESRI. Value Red Green Blue 0 0.00000000000 0.00000000000 0.00000000000 11 0.27843137255 0.41960784314 0.62745098039 12 0.81960784314 0.86666666667 0.97647058824 21 0.86666666667 0.78823529412 0.78823529412 22 0.84705882353 0.57647058824 0.50980392157 23 0.92941176471 0.00000000000 0.00000000000 24 0.66666666667 0.00000000000 0.00000000000 31 0.69803921569 0.67843137255 0.63921568628 41 0.40784313726 0.66666666667 0.38823529412 42 0.10980392157 0.38823529412 0.18823529412 43 0.70980392157 0.78823529412 0.55686274510 51 0.64705882353 0.54901960784 0.18823529412 52 0.80000000000 0.72941176471 0.48627450980 71 0.88627450980 0.88627450980 0.75686274510 72 0.78823529412 0.78823529412 0.46666666667 73 0.60000000000 0.75686274510 0.27843137255 74 0.46666666667 0.67843137255 0.57647058824 81 0.85882352941 0.84705882353 0.23921568628 82 0.66666666667 0.43921568628 0.15686274510 90 0.72941176471 0.84705882353 0.91764705882 95 0.43921568628 0.63921568628 0.72941176471





Overview Description
Entity and Attribute Overview
N/A



Entity and Attribute Detail Citation
Attribute accuracy is described, where present, with each attribute defined in the Entity and Attribute Section.





Metadata Details 

Metadata language English (UNITED STATES)
Metadata character set  utf8 - 8 bit UCS Transfer Format


Scope of the data described by the metadata  dataset
Scope name* dataset


*Last update 2016-01-27


ArcGIS metadata properties
Metadata format ArcGIS 1.0
Standard or profile used to edit metadata ItemDescription


Created in ArcGIS for the item 2014-04-09 15:16:30
Last modified in ArcGIS for the item 2016-01-27 09:53:08


Automatic updates
Have been performed Yes
Last update 2016-01-27 09:53:08


Metadata Contacts 

Metadata contact
Individual's name Customer Service Representative
Organization's name U.S. Geological Survey
Contact's position Customer Services Representative
Contact's role  point of contact


Contact information
Phone
Voice 605/594-6151
TDD/TTY 605/594-6933
Fax 605/594-6589

Address
Type both
Delivery point USGS/EROS
Delivery point 47914 252nd Street
City Sioux Falls
Administrative area SD
Postal code 57198-0001
Country US
e-mail addresscustserv@usgs.gov

Hours of service
0800 - 1600 CT, M - F (-6h CST/-5h CDT GMT)