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NC 2015 Orthoimagery Seamlines with Photo Exposure Dates


Download Link: http://data.nconemap.gov/downloads/vector/2015_NC_ortho_photo_seamlines.zip
Abstract: In 2015, on behalf of the NC Center for Geographic Information and Analysis five contractors captured 6in pixel 4-band digital aerial photos for production of 3-bands true color ortho imagery for the 24 counties on the Southern Piedmont and Mountain Region in NC. This file documents the mosaic of imagery exposures and associated seamlines used to generate the countywide collection of imagery for Macon, Cherokee, Clay, Graham, and Swain Counties NC and the dates that each of these exposures were flown. The final seamline polygons were exported from Sanborn's ESRI ArcMap software. Where necessary additional polygons were merged into this final Shapefile from other vendors working in adjacent study area. Upon definitial of final seamline polygons, the shapefile polygons were populated for each field defined in the scope, including: vendor ID, strip number, exposure number & date flown.
Purpose: This seamline dataset was created to identify the individual exposure frames and the seamlines that join these exposures together to generate countywide orthoimagery product for the Study Area 1 of Southern Piedmont and Mountains 2015 Orthoimagery Project. This dataset derives information from the ortho flightlines to provide the specific dates of imagery acquisition for each exposure frame.
Publication Date: 20151113
Originator: NC Dept. of Information Technology, Government Data Analytics Center, Center for Geographic Information and Analysis
Online Linkage: data.nconemap.gov
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 20151113
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: Unknown
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -84.389273
East Bounding Coordinate: -83.107740
North Bounding Coordinate: 35.712697
South Bounding Coordinate: 34.936846
Contact Electronic Mail Address: darrin.smith@nc.gov
Contact Voice Telephone: 919-754-6589
Grid Coordinate System Name: State Plane Coordinate System 1983
Horizontal Datum Name: D_NAD_1983_2011
Planar Distance Units: survey feet
Ellipsoid Name: Geodetic Reference System 80
Attribute:
Attribute Label: OBJECTID_1
Attribute Definition: Internal feature number.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Sequential unique whole numbers that are automatically generated.
Attribute:
Attribute Label: Shape
Attribute Definition: Feature geometry.
Attribute Definition Source: ESRI
Attribute Domain Values:
Unrepresentable Domain: Coordinates defining the features.
Attribute:
Attribute Label: StdAreaID
Attribute Definition: Study Area ID number
Attribute Definition Source: Assigned by contracting agency
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: SA1
Enumerated Domain Value Definition: Sanborn
Enumerated Domain Value Definition Source: CGIA
Attribute:
Attribute Label: Shape.STArea()
Attribute Definition: Area of feature in internal units squared.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Positive real numbers that are automatically generated.
Attribute:
Attribute Label: ExposureID
Attribute Definition: Frame number.
Attribute Definition Source: NC Orthoimagery Program
Attribute Domain Values:
Unrepresentable Domain: Frame numbers vary.
Attribute:
Attribute Label: FltLineID
Attribute Definition: Flight line number.
Attribute Definition Source: NC Orthoimagery Program
Attribute Domain Values:
Unrepresentable Domain: Flight line numbers vary.
Attribute:
Attribute Label: ImageDate
Attribute Definition: Date of acquisition imagery.
Attribute Definition Source: NC Orthoimagery Program
Attribute Domain Values:
Unrepresentable Domain: Dates vary.
Attribute:
Attribute Label: Shape.STLength()
Attribute Definition: Length of feature in internal units.
Attribute Definition Source: Esri
Attribute Domain Values:
Unrepresentable Domain: Positive real numbers that are automatically generated.
Distribution Liability: NCCGIA is charged with the development and maintenance of NC OneMap and, in cooperation with other mapping organizations, is committed to offering its users accurate, useful, and current information. Although every effort has been made to ensure the accuracy of information, errors and conditions originating from physical sources used to develop this dataset may be reflected in the data supplied. The user must be aware of possible conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions specific to certain data. NCCGIA does not support secondary distribution of this dataset without its current, compliant metadata record. The use of trade names or commercial products does not constitute their endorsement by NCCGIA or North Carolina State Government.
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