Landscape change data layer for the Virginia Coast Reserve, 1973-2001

This layer contains a change analysis from 1973 to 2001 based on analysis of satellite imagery. A NALC image from 1973 with 60-m resolution was classified using unsupervised classification into 100 classes. These classes were subsequently recoded into 5 classes (Woody, Herbaceous, Bare, Marsh and Water) based on comparisions with maps and aerial photos. The same procedure was followed for a 2001 ETM+ image that had been resampled to 15-m resolution. The recoded layers were converted to vector shapefiles and intersected to create this data layer. Subsequently, codes were added to recode the polygons into and to 3 classes (upland, marsh, water) and the area and perimeter of each polygon was calculated. Layer was later renamed (in 2013) from "vbi1970_2001c5_Intersect_N83" to "VBI_LUC_1973_2001_NAD83" to avoid temporal confusion and remove ESRI auto-naming appendage. FGDC Metadata: Identification Information: Citation: Citation information: Originators: John H. Porter Title: Change data layer for the Virginia Coast Reserve, 1973-2001 - VCR05133 *File or table name: vbi1970_2001c5_Intersect_N83 Publication date: 12/22/2005 *Geospatial data presentation form: vector digital data *Online linkage: \\MAP1\d\jhp7e\vbi1970_2001c5_Intersect_N83.shp Description: Abstract: This layer contains a change analysis from 1973 to 2001 based on analysis of satellite imagery. A NALC image from 1973 with 60-m resolution was classified using unsupervised classification into 100 classes. These classes were subsequently recoded into 5 classes (Woody, Herbaceous, Bare, Marsh and Water) based on comparisions with maps and aerial photos. The same procedure was followed for a 2001 ETM+ image that had been resampled to 15-m resolution. The recoded layers were converted to vector shapefiles and intersected to create this data layer. Subsequently, codes were added to recode the polygons into and to 3 classes (upland, marsh, water) and the area and perimeter of each polygon was calculated. Purpose: To detect changes on the coast of Virginia. *Language of dataset: en Time period of content: Time period information: Multiple dates/times: Single date/time: Calendar date: 08/12/1973 Single date/time: Calendar date: 08/27/2001 Currentness reference: ground condition Status: Progress: Complete Maintenance and update frequency: None planned Spatial domain: Bounding coordinates: *West bounding coordinate: -76.112114 *East bounding coordinate: -75.135130 *North bounding coordinate: 38.237583 *South bounding coordinate: 37.046598 Local bounding coordinates: *Left bounding coordinate: 402666.874551 *Right bounding coordinate: 487984.802095 *Top bounding coordinate: 4232184.738430 *Bottom bounding coordinate: 4100601.786647 Minimum altitude: -30 Maximum altitude: 30 Altitude units: m Keywords: Theme: Theme keywords: Change analysis Theme keyword thesaurus: None Place: Place keywords: Delmarva Peninsula Place keyword thesaurus: None Access constraints: VCR/LTER Data License required Use constraints: Bona fide scientific research. This is not a legal document Point of contact: Contact information: Contact person primary: Contact person: John Porter Contact organization: Virginia Coast Reserve Long-Term Ecological Research, University of Virginia Contact address: Address type: mailing and physical address Address: 291 McCormick Road Address: PO Box 400123 City: Charlottesville State or province: VA Postal code: 22904-4123 Country: USA Contact voice telephone: [phone] Contact facsimile telephone: [phone] Contact electronic mail address: [e-mail] Data set credit: John H. Porter, Virginia Coast Reserve Long-Term Ecological Research, University of Viriginia, Charlottesville, VA 22904 USA *Native dataset format: Shapefile *Native data set environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.0.0.535 Cross reference: Citation information: Title: VCR05113 - Change analysis of the Virginia Coast 1973-2001 Back to Top -------------------------------------------------------------------------------- Data Quality Information: Positional accuracy: Horizontal positional accuracy: Horizontal positional accuracy report: 60-m pixels were used for the 1973 image. Quantitative horizontal positional accuracy assessment: Horizontal positional accuracy value: 60 Horizontal positional accuracy explanation: 60-m pixels were used for the 1973 image. Lineage: Process step: Process description: Dataset copied. Back to Top -------------------------------------------------------------------------------- Spatial Data Organization Information: *Direct spatial reference method: Vector Point and vector object information: SDTS terms description: *Name: vbi1970_2001c5_Intersect_N83 *SDTS point and vector object type: G-polygon *Point and vector object count: 356534 ESRI terms description: *Name: vbi1970_2001c5_Intersect_N83 *ESRI feature type: Simple *ESRI feature geometry: Polygon *ESRI topology: FALSE *ESRI feature count: 356534 *Spatial index: TRUE *Linear referencing: FALSE Back to Top -------------------------------------------------------------------------------- Spatial Reference Information: Horizontal coordinate system definition: Coordinate system name: *Projected coordinate system name: NAD_1983_UTM_Zone_18N *Geographic coordinate system name: GCS_North_American_1983 Planar: Grid coordinate system: *Grid coordinate system name: Universal Transverse Mercator Universal Transverse Mercator: *UTM zone number: 18 Transverse mercator: *Scale factor at central meridian: 0.999600 *Longitude of central meridian: -75.000000 *Latitude of projection origin: 0.000000 *False easting: 500000.000000 *False northing: 0.000000 Planar coordinate information: *Planar coordinate encoding method: coordinate pair Coordinate representation: *Abscissa resolution: 0.000256 *Ordinate resolution: 0.000256 *Planar distance units: meters Geodetic model: *Horizontal datum name: North American Datum of 1983 *Ellipsoid name: Geodetic Reference System 80 *Semi-major axis: 6378137.000000 *Denominator of flattening ratio: 298.257222 Back to Top -------------------------------------------------------------------------------- Entity and Attribute Information: Detailed description: *Name: vbi1970_2001c5_Intersect_N83 Entity type: *Entity type label: vbi1970_2001c5_Intersect_N83 *Entity type type: Feature Class *Entity type count: 356534 Attribute: *Attribute label: FID *Attribute alias: FID *Attribute definition: Internal feature number. *Attribute definition source: ESRI *Attribute type: OID *Attribute width: 4 *Attribute precision: 0 *Attribute scale: 0 Attribute domain values: *Unrepresentable domain: Sequential unique whole numbers that are automatically generated. Attribute: *Attribute label: Shape *Attribute alias: Shape *Attribute definition: Feature geometry. *Attribute definition source: ESRI *Attribute type: Geometry *Attribute width: 0 *Attribute precision: 0 *Attribute scale: 0 Attribute domain values: *Unrepresentable domain: Coordinates defining the features. Attribute: *Attribute label: FID_vbi197 *Attribute alias: FID_vbi197 *Attribute type: Number *Attribute width: 9 Attribute: *Attribute label: ID *Attribute alias: ID *Attribute type: Number *Attribute width: 10 Attribute: *Attribute label: GRIDCODE *Attribute alias: GRIDCODE Attribute definition: Land cover in 1973 *Attribute type: Number *Attribute width: 10 Attribute domain values: Enumerated domain: Enumerated domain value: 1 Enumerated domain value definition: Woody Enumerated domain: Enumerated domain value: 2 Enumerated domain value definition: Bare Enumerated domain: Enumerated domain value: 3 Enumerated domain value definition: Herbaceous Enumerated domain: Enumerated domain value: 4 Enumerated domain value definition: Salt Marsh Enumerated domain: Enumerated domain value: 5 Enumerated domain value definition: Water Enumerated domain: Enumerated domain value: 0 Enumerated domain value definition: not classified Attribute: *Attribute label: FID_vbi010 *Attribute alias: FID_vbi010 *Attribute type: Number *Attribute width: 9 Attribute: *Attribute label: ID_1 *Attribute alias: ID_1 *Attribute type: Number *Attribute width: 10 Attribute: *Attribute label: GRIDCODE_1 *Attribute alias: GRIDCODE_1 Attribute definition: Land Cover in 2001 *Attribute type: Number *Attribute width: 10 Attribute domain values: Enumerated domain: Enumerated domain value: 0 Enumerated domain value definition: not classified Enumerated domain: Enumerated domain value: 1 Enumerated domain value definition: Woody Enumerated domain: Enumerated domain value: 2 Enumerated domain value definition: Bare Enumerated domain: Enumerated domain value: 3 Enumerated domain value definition: Herbaceous Enumerated domain: Enumerated domain value: 4 Enumerated domain value definition: Salt Marsh Enumerated domain: Enumerated domain value: 5 Enumerated domain value definition: Water Attribute: *Attribute label: LandC1973 *Attribute alias: LandC1973 *Attribute type: String *Attribute width: 50 Attribute: *Attribute label: LandC2001 *Attribute alias: LandC2001 *Attribute type: String *Attribute width: 50 Attribute: *Attribute label: LC1973 *Attribute alias: LC1973 Attribute definition: Simple land cover in 1973 *Attribute type: Number *Attribute width: 4 Attribute domain values: Enumerated domain: Enumerated domain value: 0 Enumerated domain value definition: not classified Enumerated domain: Enumerated domain value: 1 Enumerated domain value definition: Upland Enumerated domain value definition source: incorporates grid codes 1-3 Enumerated domain: Enumerated domain value: 2 Enumerated domain value definition: Salt Marsh Enumerated domain: Enumerated domain value: 3 Enumerated domain value definition: Water Attribute: *Attribute label: LC2001 *Attribute alias: LC2001 Attribute definition: Simple land cover in 2001 *Attribute type: Number *Attribute width: 4 Attribute domain values: Enumerated domain: Enumerated domain value: 0 Enumerated domain value definition: not classified Enumerated domain: Enumerated domain value: 1 Enumerated domain value definition: Upland Enumerated domain value definition source: incorporates gridcode_1 1-3 Enumerated domain: Enumerated domain value: 2 Enumerated domain value definition: Salt Marsh Enumerated domain: Enumerated domain value: 3 Enumerated domain value definition: Water Back to Top -------------------------------------------------------------------------------- Distribution Information: Resource description: Downloadable Data Standard order process: Digital form: Digital transfer information: *Transfer size: 115.722 *Dataset size: 115.722 Back to Top -------------------------------------------------------------------------------- Metadata Reference Information: *Metadata date: 20051222 *Language of metadata: en Metadata contact: Contact information: Contact organization primary: Contact person: REQUIRED: The person responsible for the metadata information. Contact organization: REQUIRED: The organization responsible for the metadata information. Contact address: Address type: REQUIRED: The mailing and/or physical address for the organization or individual. City: REQUIRED: The city of the address. State or province: REQUIRED: The state or province of the address. Postal code: REQUIRED: The ZIP or other postal code of the address. Contact voice telephone: REQUIRED: The telephone number by which individuals can speak to the organization or individual. *Metadata standard name: FGDC Content Standards for Digital Geospatial Metadata *Metadata standard version: FGDC-STD-001-1998 *Metadata time convention: local time Metadata extensions: *Online linkage: http://www.esri.com/metadata/esriprof80.html *Profile name: ESRI Metadata Profile Back to Top -------------------------------------------------------------------------------- Geoprocessing History: Process: *Process name: RasterToPolygon_4 *Date: 20051214 *Time: 170225 *Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Conversion Tools.tbx\RasterToPolygon *Command issued: RasterToPolygon D:\jhp7e\vbi1970class5.img D:\jhp7e\vbi1970c5.shp NO_SIMPLIFY Value Process: *Process name: Intersect_5 *Date: 20051214 *Time: 171757 *Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Analysis Tools.tbx\Intersect *Command issued: Intersect "vbi1970c5 '';vbi010827c5 ''" D:\jhp7e\vbi1970_2001c5_Intersect.shp ALL # INPUT Process: *Process name: Project_1 *Date: 20051222 *Time: 100441 *Tool location: C:\Program Files\ArcGIS\ArcToolbox\Toolboxes\Data Management Tools.tbx\Project *Command issued: Project D:\jhp7e\vbi1970_2001c5_Intersect.shp D:\jhp7e\vbi1970_2001c5_Intersect_N83.shp PROJCS['NAD_1983_UTM_Zone_18N',GEOGCS['GCS_North_American_1983',DATUM['D_North_American_1983',SPHEROID['GRS_1980',6378137.0,298.257222101]],PRIMEM['Greenwich',0.0],UNIT['Degree',0.0174532925199433]],PROJECTION['Transverse_Mercator'],PARAMETER['False_Easting',500000.0],PARAMETER['False_Northing',0.0],PARAMETER['Central_Meridian',-75.0],PARAMETER['Scale_Factor',0.9996],PARAMETER['Latitude_Of_Origin',0.0],UNIT['Meter',1.0]] NAD_1927_To_NAD_1983_6