Accuracy Assessment of the National Land Cover Database Impervious Surface dataset for Roanoke, Virginia

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dc.contributorVirginia Tech GIS & Remote Sensing 2014 Research Symposiumen
dc.contributor.authorParece, Tammy E.en
dc.contributor.authorCampbell, James B. Jr.en
dc.coverage.cityRoanokeen
dc.coverage.countryUnited Statesen
dc.coverage.stateVirginiaen
dc.date.accessioned2014-11-04T19:39:19Zen
dc.date.available2014-11-04T19:39:19Zen
dc.date.issued2014en
dc.description.abstractThe Multi-Resolution Land Characteristics Consortium (MRLC) developed National Land Cover Database Impervious Surface (NLCD IS) data to identify percent developed imperviousness for the coterminous USA. We present the results of an accuracy assessment on this data for the City of Roanoke, Virginia. First, we performed a classic accuracy assessment using a set of random points generated by GIS, and high resolution aerial photographs (1/2 foot resolution), varying the NLCD IS’ percent imperviousness from 10% to 75% per cell, resulting in an overall accuracy of around 70% for most thresholds. Then a polygon impervious surface dataset was delineated in GIS using the same high resolution aerial photos, and subsequently subdivided into 30 meter by 30 meter pixels matching each cell boundary of the NLCD IS data. A second accuracy assessment was performed on a cell by cell basis, comparing the NLCD IS to this newly created impervious surface dataset. Finally, terrain relief, specifically percent slope created from a 30 meter digital elevation model, was added to the analysis to determine if it impacted the accuracy of the NLCD IS data in the cell by cell assessment.en
dc.description.sponsorshipVirginia Tech. Office of Geographical Information Systems and Remote Sensingen
dc.format.mimetypeapplication/pdfen
dc.identifier.urihttp://hdl.handle.net/10919/50674en
dc.language.isoenen
dc.rightsIn Copyrighten
dc.rights.holderParece, Tammy E.en
dc.rights.holderCampbell, James B.en
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectNational land cover data impervious surface dataset (NLCD IS)en
dc.subjectAerial photographyen
dc.subjectAccuracy assessmenten
dc.subjectRoanoke, Va.en
dc.titleAccuracy Assessment of the National Land Cover Database Impervious Surface dataset for Roanoke, Virginiaen
dc.typePosteren
dc.type.dcmitypeTexten
dc.type.dcmitypeImageen

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