| Section 1 | Overview | |||
| Originator | U.S. Geological Survey | |||
| Title | Annual National Land Cover Database (NLCD) Collection 1 Land Cover Conterminous United States | |||
| Abstract | The USGS Land Cover program has combined the tried-and-true methodologies from premier land cover projects, National Land Cover Database (NLCD) and Land Change Monitoring, Assessment, and Projection (LCMAP), together with modern innovations in geospatial deep learning technologies to create the next generation of land cover and land change information. The product suite is called, “Annual NLCD” and includes six annual products that represent land cover and surface change characteristics of the U.S.: 1) Land Cover, 2) Land Cover Change, 3) Land Cover Confidence, 4) Fractional Impervious Surface, 5) Impervious Descriptor, and 6) Spectral Change Day of Year. These land cover science product algorithms harness the remotely sensed Landsat data record to provide state-of-the-art land surface change information needed by scientists, resource managers, and decision-makers. Annual NLCD uses a modernized, integrated approach to map, monitor, synthesize, and understand the complexities of land use, cover, and condition change. With this first release, Annual NLCD, Collection 1.0, the six products are available for the Conterminous U.S. for 1985 – 2023. Questions about the Annual NLCD product suite can be directed to the Annual NLCD mapping team at USGS EROS, Sioux Falls, SD (605) 594-6151 or custserv@usgs.gov. See included spatial metadata for more details. | |||
| Purpose | 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. | |||
| Time Period of Content Date | ||||
| Currentness Reference | ground condition | |||
| Progress | Complete | |||
| Maintenance and Update Frequency | Annually | |||
| Spatial Extent of Data | ||||
| Bounding Coordinates | -129.27731989810934 -63.118429521429235 52.921719733858104 21.805095225544456 | |||
| Place Keywords | United States | |||
| Theme Keywords | imageryBaseMapsEarthCover | |||
| Theme Keyword Thesaurus | ISO 19115 Topic Category | |||
| Access Constraints | None. Please see 'Distribution Info' for details. | |||
| Use Constraints | None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. | |||
| Contact Person Information | ,
Customer Service Representative 47914 252nd Street Sioux Falls, SD 57198-0001 Phone: 605-594-6151 Fax: 605-594-6589 Email: custserv@usgs.gov | |||
| Browse Graphic | None available | |||
| Associated Data Sets | Lessons learned implementing an operational continuous United States national land change monitoring capability: The Land Change Monitoring, Assessment, and Projection (LCMAP) approach | |||
| Section 2 | Data Quality | |||
| Attribute Accuracy | A formal accuracy assessment is in progress for the Annual NLCD product suite. | |||
| Logical Consistency | An internal review process was conducted to check for erroneous data artifacts, duplications, and omissions to ensure the integrity of the geospatial data products. | |||
| Completeness | Dataset is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. | |||
| Horizontal Positional Accuracy | No formal positional accuracy tests were conducted. | |||
| Vertical Positional Accuracy | No formal positional accuracy tests were conducted. | |||
| Lineage | Reference Document Please reference the Annual National Land Cover Database (NLCD) Collection 1 Science Product User Guide for more detailed methodology and information. The user guide can be found at https://www.mrlc.gov/documentation. | |||
| Section 3 | Spatial Data Organization (not used in this metadata) | |||
| Section 4 | Coordinate System | |||
| Horizontal Coordinate Scheme | ||||
| Horizontal Datum | WGS_1984 | |||
| Horizontal Units | meters | |||
| Cell Width | 30.0 | |||
| Cell Height | 30.0 | |||
| Section 5 | Attributes | |||
| Overview | Land Cover Class RGB Color Value Table. The specific RGB values for the Land Cover classes that were used for Annual NLCD Collection 1. | |||
| Detailed Citation | Attributes defined by USGS Value Red, Green, Blue 250 0, 0, 0 11 70, 107, 159 12 209, 222, 248 21 222, 197, 197 22 217, 146, 130 23 235, 0, 0 24 171, 0, 0 31 179, 172, 159 41 104, 171, 95 42 28, 95, 44 43 181, 197, 143 52 204, 184, 121 71 223, 223, 194 81 220, 217, 57 82 171, 108, 40 90 184, 217, 235 95 108, 159, 184 | |||
| Table Detail: | ||||
| Annual NLCD C1V0 - Land Cover class counts and descriptions for the Annual NLCD Land Cover Database (U.S. Geological Survey) | |||
| Field Name | Valid Values | Definition | Definition Source |
|---|---|---|---|
| OID | Internal feature number. | Annual NLCD | |
| Count | A nominal integer value that designates the number of pixels that have each value in the file; histogram column in raster attributes table. | Annual NLCD | |
| Value | enumerated | Land Cover Class Code Value | Annual NLCD |
| 250 | NoData | Annual NLCD | |
| 11 | Open Water - All areas of open water, generally with less than 25% cover or vegetation or soil. | Annual NLCD | |
| 12 | Perennial Ice/Snow - All areas characterized by a perennial cover of ice and/or snow, generally greater than 25% of total cover. | Annual NLCD | |
| 21 | 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. | Annual NLCD | |
| 22 | 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. | Annual NLCD | |
| 23 | 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. | Annual NLCD | |
| 24 | 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. | Annual NLCD | |
| 31 | 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. | Annual NLCD | |
| 41 | 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. | Annual NLCD | |
| 42 | 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. | Annual NLCD | |
| 43 | 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. | Annual NLCD | |
| 52 | 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. | Annual NLCD | |
| 71 | 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. | Annual NLCD | |
| 81 | 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. | Annual NLCD | |
| 82 | Cultivated Crops - Areas used to produce 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. | Annual NLCD | |
| 90 | 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. | Annual NLCD | |
| 95 | 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. | Annual NLCD | |
| Section 6 | Distribution | |||
| Publisher | U.S. Geological Survey | |||
| Publication Date | 10/16/2024 | |||
| Contact Person Information | ,
47914 252nd Street Sioux Falls, SD 57198-0001 Phone: 800-252-4547 Email: custserv@usgs.gov | |||
| Distributor's Data Set Identifier | ||||
| Distribution Liability | Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Although these data and associated metadata have been reviewed for accuracy and completeness and approved for release by the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data for other purposes, nor on all computer systems, nor shall the act of distribution constitute any such warranty. | |||
| Ordering Instructions | ||||
| Online Linkage | I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details. | |||
| Section 7 | Metadata Reference | |||
| Metadata Date | 08/28/2024 | |||
| Contact Person Information | ,
Customer Service Representative 47914 252nd Street Sioux Falls, SD 57198-0001 Phone: 605-594-6151 Fax: 605-594-6589 Email: custserv@usgs.gov | |||
| Metadata Standard Name | FGDC Content Standard for Digital Geospatial Metadata | |||
| Metadata Standard Version | FGDC-STD-001-1998 | |||
| Metadata Standard Online Linkage | ||||