NC Orthoimagery Latest - Analysis

The NC Orthoimagery Program collects and produces 6-inch (15cm) orthoimagery on a 4-year cycle. Approximately a quarter of the state is flown each year to develop streaming imagery services, 5,000' by 5,000' tiles, and compressed single-file county mosaics. Beginning in 2020, the State started collecting a fourth band (near infrared) of imagery which, when combined with the other 3 bands of red, green, and blue, opens new possibilities for exploration and analysis. The NC Orthoimagery - Analysis image service uses the most recent 4-band imagery collected for any location in North Carolina to depict a 3-band, natural color representation of the data. The compression method (DEFLATE) used for this imagery minimizes the alteration of individual pixel values so that this data may be used for analyses. The imagery has a pixel resolution of 6 inches with an RMSE of 1.0 ft X and Y. This data is also available as WCS and WMS services. Viewing the latest imagery Several web services are also available that depict the latest imagery for any location in the state. These support general viewing and raster analysis and are offered in various protocols including Esri (e.g. REST, SOAP) and OGC (e.g., WMS, WFS, WCS). These can be found by searching using the terms "orthoimagery" and "latest." To help determine which is most suitable, refer to this guide.北卡罗来纳州正射影像项目（NC Orthoimagery Program）每四年为一个周期，采集并生成分辨率为6英寸（15厘米）的正射影像（orthoimagery）。每年将对该州约四分之一的区域开展航空拍摄作业，以产出流式影像服务所需的5000英尺×5000英尺影像瓦片（tiles）以及单文件压缩的县域镶嵌影像（county mosaics）。自2020年起，该州开始采集影像的第四波段——近红外（near infrared）波段；将其与红、绿、蓝三个现有波段结合后，可为影像探索与分析工作带来全新机遇。北卡罗来纳州正射影像-分析影像服务（NC Orthoimagery - Analysis image service）会调用本州任一区域采集的最新四波段影像，将其渲染为三波段自然色彩的数据展示形式。该影像所采用的DEFLATE压缩算法可最大限度降低单个像素值的改动与失真，确保该数据可用于各类分析工作。该影像的像素分辨率为6英寸，X、Y方向的均方根误差（RMSE）均为1.0英尺。该数据还可通过Web覆盖服务（Web Coverage Service，WCS）与Web地图服务（Web Map Service，WMS）获取。浏览最新影像：该州还提供多款网页服务，可展示本州任一区域的最新影像。这些服务支持常规影像浏览与栅格分析，提供多种协议接口，包括环境系统研究所（Esri）相关协议（如表述性状态转移（REST）、简单对象访问协议（SOAP））以及开放地理空间信息联盟（OGC）相关协议（如WMS、WFS、WCS）。可通过搜索"orthoimagery"与"latest"关键词查找这些服务。如需选择最适配的服务，请参阅此指南。