A Comparison of Imperviousness Derived from a Detailed Land Cover Dataset (DLCD) versus the National Land Cover Dataset (NLCD) at Two Time Periods
| dc.contributor.author | Cooper, Brandon Elliott | en |
| dc.contributor.committeechair | Dymond, Randel L. | en |
| dc.contributor.committeemember | Young, Kevin D. | en |
| dc.contributor.committeemember | Shao, Yang | en |
| dc.contributor.department | Civil and Environmental Engineering | en |
| dc.date.accessioned | 2016-09-02T08:00:37Z | en |
| dc.date.available | 2016-09-02T08:00:37Z | en |
| dc.date.issued | 2016-09-01 | en |
| dc.description.abstract | To address accuracy concerns of the National Land Cover Dataset (NLCD), this case study compares impervious surface from the NLCD to a Detailed Land Cover Dataset (DLCD) for the Town of Blacksburg, Virginia over two time periods (2005/2006 and 2011) at spatial aggregation scales (fine to coarse) and scopes (site-specific to area-extent). When comparing the total impervious surface area, the NLCD overestimated the DLCD by appreciable amounts (12-27%) for the entire town and across all specified land use zones for both time periods examined. A binary pixel-wise accuracy assessment of impervious surface revealed that the NLCD performed well for all scopes except for the single family land use zone (user accuracy <40%). The spatial aggregation of pixels to 90-m led to improved agreement between the two datasets. Using the DLCD as a reference, an empirical normalization equation was successfully applied to the NLCD to further reduce overestimation and data skewness. | en |
| dc.description.degree | Master of Science | en |
| dc.format.medium | ETD | en |
| dc.identifier.other | vt_gsexam:8301 | en |
| dc.identifier.uri | http://hdl.handle.net/10919/72869 | en |
| dc.publisher | Virginia Tech | en |
| dc.rights | In Copyright | en |
| dc.rights.uri | http://rightsstatements.org/vocab/InC/1.0/ | en |
| dc.subject | Land Cover | en |
| dc.subject | Impervious Surface | en |
| dc.subject | Land Use | en |
| dc.subject | Remotely Sensed Imagery | en |
| dc.subject | Stormwater | en |
| dc.title | A Comparison of Imperviousness Derived from a Detailed Land Cover Dataset (DLCD) versus the National Land Cover Dataset (NLCD) at Two Time Periods | en |
| dc.type | Thesis | en |
| thesis.degree.discipline | Civil Engineering | en |
| thesis.degree.grantor | Virginia Polytechnic Institute and State University | en |
| thesis.degree.level | masters | en |
| thesis.degree.name | Master of Science | en |
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