Maine Orthoimagery Regional 2017 (Imagery Layer)

Image Service | OGC WCS | OGC WMS | KMZ |Tile Download Maine Statewide Orthoimagery Project - All imagery was collected during the 2017 Spring flying season during leaf-off conditions for deciduous vegetation in the State of Maine. The sun angle was at 30-degrees or greater, and streams were within their normal banks. During the flight planning and acquisition, a significant effort was made to limit clouds, snow, fog, haze, smoke, or other ground obscuring conditions in the imagery. In no case does 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. Deliverables are: One set of 4-band stacked digital orthoimagery at 0.075 meter (3-inch) pixel resolution for each tile in GeoTIFF format with TIFF world files, Shapefile of flightlines with acquisition dates in ESRI format, Shapefile of control points in ESRI format, Shapefile of tile index in ESRI format, Shapefile of seamlines in ESRI format, FGDC Compliant Metadata for Orthoimagery Product Additional deliverables include two MrSID (Multi resolution Seamless Image Database) files covering Portland and Scarborough area at an 18:1 compression ratio.影像服务 | OGC WCS（网络覆盖服务，Web Coverage Service）| OGC WMS（网络地图服务，Web Map Service）| KMZ | 瓦片下载 缅因州全州正射影像项目——所有影像采集于2017年春季飞行作业季，彼时缅因州境内的落叶植被处于落叶期。太阳高度角不低于30度，河道均处于正常水位岸线范围内。在飞行规划与影像采集阶段，项目组已投入大量精力以限制云层、降雪、雾霭、烟尘或其他地面遮蔽因素出现在影像中。单幅影像的最大云量覆盖率均不超过5%。仅在发电厂、工厂或受控农业焚烧的邻近区域，影像中可能会出现少量蒸汽、烟雾或阴影。 交付成果包括：每个分幅瓦片均配备一套4波段堆叠式数字正射影像，像素分辨率为0.075米（3英寸），格式为GeoTIFF并附带TIFF世界文件；包含采集日期信息的ESRI格式飞行航线Shapefile；ESRI格式控制点Shapefile；ESRI格式分幅索引Shapefile；ESRI格式接缝线Shapefile；符合联邦地理数据委员会（FGDC）标准的正射影像产品元数据。额外交付成果包括两份采用18:1压缩比的MrSID（多分辨率无缝影像数据库，Multi-resolution Seamless Image Database）文件，覆盖波特兰与斯卡伯勒地区。