Troy Township MrSID 2025

<p><span>This metadata record describes the 0.25-foot pixel resolution digital orthoimagery produced for Oakland County, MI by the Sanborn Map Company. The orthoimagery provided is 4-band (R, G, B, NIR), 8-bit per pixel and delivered in uncompressed TIFF/TFW format and compressed 3-band (R, G, B) MrSID mosaics (20:1, Gen3). The data was flown between April 27th and May 12th, 2025 at an altitude of 15700 feet (AMSL) using an UltraCam Osprey M3 camera and complies with the American Society for Photogrammetry and Remote Sensing Accuracy Standards (ASPRS) for Class 1, large scale maps at 1" = 50'.&nbsp; This orthoimagery is published in Michigan South State Plane, NAD83, International foot.</span></p>本元数据记录描述了由桑伯恩地图公司（Sanborn Map Company）为密歇根州奥克兰县（Oakland County, MI）制作的0.25英尺像素分辨率数字正射影像数据集。本次提供的正射影像包含4个波段（红、绿、蓝、近红外（NIR）），每像素位深为8位，分别以未压缩TIFF/TFW格式，以及压缩比20:1的3波段（红、绿、蓝）MrSID镶嵌影像（Gen3版本）两种形式交付。该数据的航摄作业于2025年4月27日至5月12日期间开展，飞行高度为15700英尺（平均海平面以上高度，AMSL），搭载的相机为UltraCam Osprey M3。本数据集符合美国摄影测量与遥感学会（American Society for Photogrammetry and Remote Sensing, ASPRS）的1级大比例尺地图精度标准，对应比例尺为1英寸=50英尺。该正射影像采用密歇根州南部州平面坐标系，基准为NAD83，单位为国际英尺。