Maine Orthoimagery Municipal Carthage 2022

Maine Statewide Orthoimagery Project - During the spring of 2022 the Woolpert team acquired new 4-band (R, G, B, and NIR). The imagery was acquired covering the entire project area using UltraCam Eagle digital camera systems. All imagery was collected during the 2022 spring flying season during leaf-off conditions for deciduous vegetation in the State of Maine. The sun angle shall be 25-degrees or greater, and streams should be within their normal banks, unless otherwise negotiated. During flight planning and acquisition, a significant effort is made to limit clouds, snow (please note: small amounts of snow such as piles in parking lots, extreme shaded areas, within dense evergreens or unpopulated northern facing slopes may be acceptable), fog, haze, smoke, or other ground obscuring conditions in the imagery. In no case will the maximum cloud cover exceed 5% per image. Within the immediate areas of power plants, factories, or controlled agricultural burns some steam or smoke and/or shadows may be visible on imagery. Woolpert produced new 8-bit, 4-band stacked color digital orthoimagery files in GeoTIFF format with TFW “world file” at a 7.5cm (3-inch) and 15cm (6-inch).缅因州全州正射影像项目（Maine Statewide Orthoimagery Project）：2022年春季，伍尔珀特（Woolpert）团队采集了全新的4波段（红、绿、蓝及近红外，R, G, B, NIR）影像数据。本次采集覆盖项目全域，采用UltraCam Eagle数码相机系统完成。所有影像均采集于2022年春季飞行季，彼时缅因州境内的落叶植被处于落叶无叶状态。采集规范要求太阳高度角不低于25度，溪流需维持正常水位的岸线范围，除非另有协商约定。在飞行规划与影像采集阶段，团队将尽最大努力规避影像中出现云、雪（注：少量积雪，如停车场积雪堆、极端阴影区域、茂密常绿植被内或无人居住的北坡区域可接受）、雾、霾、烟雾或其他遮挡地面的异常成像情况。任何情况下单幅影像的最大云量覆盖率均不得超过5%。在发电厂、工厂或受控农业焚烧作业的紧邻区域内，影像中可能出现少量蒸汽、烟雾及/或阴影，此类情况属于合规例外。伍尔珀特最终生成了8位深、4波段堆叠式彩色数字正射影像文件，格式为GeoTIFF，并附带TFW "world file"，分辨率分别为7.5厘米（3英寸）与15厘米（6英寸）。