Dataset Identification:
- Geospatial data is comprised of water, barren, shrubland, vegetation, wetlands and other selected map features.
- Title USGS Land Cover - Woodland for Iowa 20140418 State or Territory FileGDB 9.3.1
- publication Date 2014-04-18
- organisation Name U.S. Geological Survey
- Contact information
-
- Address
-
- , Reston, VA
- organisation Name U.S. Geological Survey, National Geospatial Technical Operations Center
- organisation Name U.S. Geological Survey
- organisation Name
- Contact information
-
- Linkage for online resource
Theme keywords (theme):
land cover
imagery
annotations
habitat
ecology
biota
flora
Agricultural land
Barren land
Forest land
Not Classified
Orthoimage
Range land
Urban and built-up land
Water
Wetland
Woodland
- Title None
Theme keywords (theme):
Downloadable Data
- Title The National Map Type Thesaurus
Theme keywords (theme):
Land Cover
- Title The National Map Theme Thesaurus
Theme keywords (theme):
Land Cover - Woodland
- Title The National Map Collection Thesaurus
Theme keywords (theme):
State
- Title The National Map Product Extent Thesaurus
Theme keywords (theme):
FileGDB 9.3.1
- Title The National Map Product Format Thesaurus
Location keywords:
US
US-IA
- Title The National Map Place Thesaurus
Theme keywords (theme):
- Title Realm > Geosphere
- publication Date 2016-11-14
Theme keywords (theme):
- Title Method > Information Processing
- publication Date 2016-11-14
Theme keywords (theme):
- Title Realm > Habitat
- publication Date 2016-11-14
Theme keywords (theme):
- Title Realm > Earth Surface
- publication Date 2016-11-14
Theme keywords (theme):
- Title Virtual International Authority File (VIAF) Corporate Names
- publication Date 2016-11-14
Theme keywords (theme):
- Title Feature > Environmental Feature
- publication Date 2016-11-14
Theme keywords (theme):
- Title Material > Environmental Material
- publication Date 2016-11-14
Theme keywords (theme):
- Title Science Domain > Ecology
- publication Date 2016-11-14
purpose:
Browse image (thumbnail):
- maintenance or update frequency: irregular
- Constraints
-
- Use limitation statement:
- No liability for content or accuracy is presumed by USGS for data.
- Legal Constraints
-
- use constraint: otherRestrictions
- Other constraints
- Use Constraints: None. However, users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgment of the U.S. Geological Survey would be appreciated for products derived from these data.
- Legal Constraints
-
- Access Constraints otherRestrictions
- Other constraints
- Access Constraints: None
Resource extent
-
- westBoundLongitude -96.6394850000199
- eastBoundLongitude -90.1400609996916
- northBoundLatitude 43.5011960001858
- southBoundLatitude 40.3754399998292
Geographic Bounding Box - Temporal Extent
Geographic Extent
1970-01-01
2014-04-18
- This dataset is a land cover dataset that is delineated by areas defined as water, barren, shrubland, wetlands, etc.; {"gdaId" : 6051501}
Vector spatial representation information
-
- Geometric Objects
-
- geometric Object Type VOID POLYGON COMPOSED OF RINGS
- geometric Object Count 1012
Grid spatial representation
- number of grid dimensions: 2
- Grid axis property:
-
- Grid Dimension
-
- Dimension Name: column
- Dimension Size
- Grid Dimension
-
- Dimension Name: row
- Dimension Size
- transformation parameter availability: false
Data quality information
Scope of quality information
- source
-
- source description Source Contribution: ImageSource Type digital data
- representative resolution scale:
-
- Scale denominator: 24000
- source citation
-
- Title Orthoimagery
- publication Date 2014-04-18
- presentationForm RASTER DIGITAL DATA OR DIGITAL ORTHORECTIFIED IMAGE OR NAIP DIGITAL ORTHO PHOTO IMAGE
- other Citation Details An orthorectified image is a layer in every product and is provided by the USDA-FSA-APFO from the National Agriculture Image Program (NAIP). This offers the USGS a nationally consistent image product, normally with a one meter resolution in natural color.
- cited responsible party - originator
-
- organisation Name National Agriculture Image Program (NAIP) administered by the Aerial Photography Field Office (APFO) for the United States Department of Agriculture.
- cited responsible party -
-
- organisation Name
- Contact information
-
- Linkage for online resource
Resource extent
- Temporal Extent
2010-08-20
2014-04-18
- source description Source Contribution: Geographic feature namesSource Type digital data
- representative resolution scale:
-
- Scale denominator: 24000
- source citation
-
- Title Geographic Names Information System (GNIS)
- publication Date 2014-04-18
- presentationForm mapDigital
- other Citation Details The Geographic Names Information System (GNIS) is the Federal and national standard for geographic nomenclature. The U.S. Geological Survey developed the GNIS in support of the U.S. Board on Geographic Names as the official repository of domestic geographic names data, the official vehicle for geographic names use by all departments of the Federal Government, and the source for applying geographic names to Federal electronic and printed products.
- cited responsible party - originator
-
- organisation Name U.S. Geological Survey, National Geospatial Technical Operations Center
- organisation Name
- Contact information
-
- Linkage for online resource
Resource extent
- Temporal Extent
2012-01-01
2014-04-18
- source description Source Contribution: National Landcover Dataset; National Hydrography Dataset; National Transportation DatasetSource Type digital data
- representative resolution scale:
-
- Scale denominator: 24000
- source citation
-
- Title Land Cover - Woodland
- publication Date 2014-04-18
- presentationForm mapDigital
- other Citation Details The Woodland Tint is a derivative land cover product created using several national map layers: three National Land Cover Database (NLCD) 2001 raster layers (Tree Canopy, Imperviousness, and Land Cover); and two vector layers (National Hydrography Dataset and Transportation). The process begins with masking the NLCD 2001 Canopy Data with NLCD 2001 Imperviousness V1 (values from 1-100), and Land Cover V1 (value 11 = Open Water). The resulting raster data with canopy values of 20 and greater are converted to woodland vector polygons and smoothed via the Paek Algorithm. The woodland polygons are masked with buffered Transportation (Roads, Airport Runways, and Railroads) and Hydrography (NHD Areas excluding Inundation Area and NHD Waterbodies excluding Swamp/Marsh). The resulting polygons are checked for scale appropriate size (minimum size of one acre), and the small woodland polygons as well as small clearings within the woodland polygons are deleted.
- cited responsible party - originator
-
- organisation Name U.S. Geological Survey, National Geospatial Technical Operations Center
- organisation Name
- Contact information
-
- Linkage for online resource
Resource extent
- Temporal Extent
2001-01-01
2014-04-18
- name Of Measure Horizontal Positional Accuracy Report
- evaluation Method Description This US map product is compiled to meet National Map Accuracy Standards (NMAS). NMAS horizontal accuracy requires that at least 90 percent of well-defined points tested are within 0.02 inch of the true position. In this product, the projection line, grids, and orthoimage are believed to meet NMAS. Positional accuracy of the other data layers is less controllable because of diversity of data sources, and may not meet NMAS.
- name Of Measure Vertical Positional Accuracy Report
- evaluation Method Description The overall absolute vertical accuracy expressed as the root mean square error (RMSE) is 2.44 meters. The measured vertical RMSE was converted to equivalent NMAS and NSSDA expressions. The accuracy is expressed in terms of the National Map Accuracy Standards (NMAS), which use a 90 percent confidence interval, and in terms of the National Standard for Spatial Data Accuracy (NSSDA), which uses a 95 percent confidence interval.
- evaluation Method Description Each layer of the dataset is extracted from the USGS national geospatial databases.
- evaluation Method Description Each layer of the dataset is extracted from the USGS national geospatial databases.
- measure Description This product is a layered dataset that has been extracted, edited, and updated according to USGS standards.
Resource distribution information
Distributor
- organisation Name U.S. Geological Survey, National Geospatial Technical Operations Center
- Contact information
-
- Telephone
-
- Voice 1-888-ASK-USGS (1-888-275-8747)
- Address
-
- 1400 Independence Road, Rolla, MO, 65401
- electronic Mail Address http://www.usgs.gov/ask/
- Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask.
- fees None
- Format name FileGDB
- Format version 9.3.1
- file Decompression Technique No compression applied
- transfer Size 255.469687
- Linkage for online resource
- date of next update: 2015-04-18
- maintenance or update frequency: annually
- notes: This metadata was automatically generated from the FGDC Content Standard for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-06-20T17:21:00 version of the FGDC RSE to ISO 19115-2 transform.
- notes: Last Metadata Review Date: 2014-04-18
- organisation Name U.S. Geological Survey, National Geospatial Technical Operations Center
- Contact information
-
- Telephone
-
- Voice 1-888-ASK-USGS (1-888-275-8747)
- Address
-
- 1400 Independence Road, Rolla, MO, 65401
- electronic Mail Address http://www.usgs.gov/ask/
- Metadata information can also be obtained through online services using The National Map Viewer, at http://nationalmap.usgs.gov or EarthExplorer, at http://earthexplorer.usgs.gov or Ask USGS at http://www.usgs.gov/ask.