Ortho Seam Lines with Photo Exposure Dates - 2022 Imagery

In 2022, on behalf of the North Carolina Center for Geographic Information and Analysis four contractors captured 6-inch pixel 4-band (RGB-IR) orthoimagery for the 26 Northern Piedmont and mountain counties in North Carolina. These contractors are Spatial Data Consultants, Inc., Sanborn Map Company, Atlas Geographic Data, Surdex Corporation, and Survey and Mapping (SAM). This file documents the mosaic of the imagery exposures and associated seamlines used to generate the collection of imagery by the contractors for the entire study area of North Carolina for the following counties , Alamance, Alexander, Alleghany, Ashe, Avery, Burke, Caldwell, Caswell, Catawba, Davidson, Davie, Forsyth, Guilford, Iredell, Madison, Mcdowell, Mitchell, Randolph, Rockingham, Rowan, Stokes, Surry, Watauga, Wilkes, Yadkin, Yancey; and the date each exposure was flown. Seamlines were converted to polygon shapefile format, checked for gaps and overlaps, attributed, and trimmed to the study area boundary. This dataset contains a polygon seamline index attributed with, Exposure date the season. These attributes were based on information collected from individual frames and from flight line datasets. This seamline dataset was created to identify the individual exposure frames and the seamlines that join these exposures together to generate the orthoimagery product for the Northern Piedmont and Mountains 2022 Project (NPM22). The purpose of this dataset derives information from the exploitation flight lines to provide the specific dates of imagery acquisition for each image frame.2022年，北卡罗来纳州地理信息与分析中心（North Carolina Center for Geographic Information and Analysis）委托四家承包商，针对北卡罗来纳州北部皮埃蒙特与山区的26个县，采集了像素尺寸为6英寸的4波段（RGB-IR）正射影像 (orthoimagery)。四家承包商分别为空间数据咨询公司（Spatial Data Consultants, Inc.）、桑伯恩地图公司（Sanborn Map Company）、阿特拉斯地理数据公司（Atlas Geographic Data）、萨德克斯公司（Surdex Corporation）以及测绘公司（Survey and Mapping, SAM）。本文件记录了针对下述县份组成的整个研究区域，由承包商采集的影像拼接图及用于生成正射影像集的相关接缝线 (seamlines)，同时标注了每张影像的拍摄日期：阿拉曼斯县（Alamance）、亚历山大县（Alexander）、阿勒格尼县（Alleghany）、阿什县（Ashe）、埃弗里县（Avery）、伯克县（Burke）、考德威尔县（Caldwell）、卡斯韦尔县（Caswell）、卡托巴县（Catawba）、戴维森县（Davidson）、戴维县（Davie）、福赛斯县（Forsyth）、吉尔福德县（Guilford）、艾尔德尔县（Iredell）、麦迪逊县（Madison）、麦克道威尔县（Mcdowell）、米切尔县（Mitchell）、伦道夫县（Randolph）、罗金厄姆县（Rockingham）、罗恩县（Rowan）、斯托克斯县（Stokes）、萨里县（Surry）、瓦托加县（Watauga）、威尔克斯县（Wilkes）、亚德金县（Yadkin）、扬西县（Yancey）。接缝线已转换为多边形形状文件 (shapefile) 格式，并完成了缝隙与重叠检查、属性赋值，且已裁剪至研究区域边界。本数据集包含带有属性信息的多边形接缝线索引，其属性为拍摄日期所属季节，此类属性信息来源于单张影像帧及飞行航线数据集。本接缝线数据集旨在识别单个影像拍摄帧，以及用于拼接这些影像帧以生成2022年北部皮埃蒙特与山区项目（Northern Piedmont and Mountains 2022 Project, NPM22）正射影像产品的接缝线。本数据集的用途为从采集飞行航线中提取信息，为每张影像帧提供具体的影像获取日期。