Aerial Photography (Orthophoto) - 2025

2025 Orthophoto - 3 inch resolution: This document describes the processes used to create the orthoimagery data produced for the District of Columbia from 2025 digital aerial photography. It was flown on March 27th 2025. The aerial imagery acquisition was flown to support the creation of 4-band digital orthophotography with a 3 inch/0.08 meter pixel resolution over the full project area covering the District of Columbia which is approximately 69 square miles. The contractor received waivers to fly in the Flight Restricted Zone (FRZ) and P-56 areas. The ortho imagery was submitted to DC OCTO in GeoTiff/TFW format tiles following the tile scheme provided by OCTO. MrSID and JPEG2000 compressed mosaics were delivered as well using a 50:1 compression ratio.2025年正射影像（Orthophoto）——3英寸分辨率：本文件详述了基于2025年数码航空摄影成果，为哥伦比亚特区制作正射影像数据的完整流程。该次航空摄影作业于2025年3月27日开展。本次航空影像采集作业旨在为覆盖约69平方英里的哥伦比亚特区全域项目区域，制作具备3英寸（0.08米）像素分辨率的四波段数码正射影像。作业承包商已获得许可，可在飞行限制区（Flight Restricted Zone，FRZ）及P-56区域开展飞行作业。正射影像按照DC OCTO提供的瓦片分幅规则，以GeoTIFF/TFW格式瓦片形式提交至DC OCTO。同时还交付了采用50:1压缩比的MrSID及JPEG2000压缩镶嵌影像。