• Arctic SDI catalogue
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GAP Land Cover Level 1

This dataset combines the work of several different projects to create a seamless data set for the contiguous United States. Data from four regional Gap Analysis Projects and the LANDFIRE project were combined to make this dataset. In the Northwestern United States (Idaho, Oregon, Montana, Washington and Wyoming) data in this map came from the Northwest Gap Analysis Project. In the Southwestern United States (Colorado, Arizona, Nevada, New Mexico, and Utah) data used in this map came from the Southwest Gap Analysis Project. The data for Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, Mississippi, Tennessee, and Virginia came from the Southeast Gap Analysis Project and the California data was generated by the updated California Gap land cover project. In areas of the county (central U.S., Northeast) that have not yet been covered by a regional Gap Analysis Project, data from the Landfire project was used. In 2009 Landfire data was combined by the Landscope project into one uniform coverage. This compiled data was the data pulled into this project. Similarities in the methods used by these projects made possible the combining of the data they derived into one seamless coverage. They all used multi-season satellite imagery (Landsat ETM+) from 1999-2001 in conjunction with digital elevation model (DEM) derived datasets (e.g. elevation, landform) to model natural and semi-natural vegetation. Vegetation classes were drawn from NatureServe's Ecological System Classification (Comer et al. 2003). Additionally, all of the projects included land use classes that were employed to describe areas where natural vegetation has been altered. In many areas of the country these classes were derived from the National Land Cover Dataset (NLCD). For the majority of classes and, in most areas of the country, a decision tree classifier was used to discriminate ecological system types. In some areas of the country, more manual techniques were used to discriminate small patch systems and systems not distinguishable through topography. The digital land cover dataset may be used for various purposes with user's discretion. Specifically, this dataset was created for regional terrestrial biodiversity assessment. These data are not intended to be used at scales larger than 1:100,000.

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Identification info

Date ( Revision )
2016-09-13T18:20:51Z
Date ( Publication )
2013-01-24T20:55:15Z
Point of contact
  National GAP Analysis Program -
530 S. Asbury Suite 1 , Moscow , 99163 , USA
208-885-3720
Keywords ( Theme )
  • GAP Vegetation Land Cover
Service Type
OGC:WMS
Service Version
1.3.0
Fees
None
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Use limitation
None

Contains Operations

Operation Name
ASDD nodes zserver
Connect Point
ASDD Z3950 zserver ( z3950 )

ASDD Z3950 zserver

Operates On
  • b2403422-2125-491b-863b-f18836983e97
  • de91c708-7a67-4492-b0f6-76ab1c55a57f
OnLine resource
http://gis1.usgs.gov/arcgis/services/gap/gap_lc_level_1/MapServer/WMSServer?SERVICE=WMS&REQUEST=GetCapabilities
OnLine resource
Service in Spatineo Directory ( WWW:LINK-1.0-http--link )

Service in Spatineo Directory

File identifier
649f0ea8-fad3-45d6-b95b-3f21c8c895be XML
Character set
UTF8
Hierarchy level
Service
Date stamp
2021-02-28T01:05:07Z
Metadata standard name
ISO 19115:2003/19139
Metadata standard version
1.0
Point of contact
  Spatineo Inc.
Kellosilta 2 D , Helsinki , FI-00520 , Finland
+358 20 703 2210
 
 

Overviews

Spatial extent

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Keywords

GAP Vegetation Land Cover

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Associated resources

Not available


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