Quantum Spatial, Inc., Quantum Spatial, Inc. 20201215 Big Sky Water and Sewer District No. 363 Product: This orthoimagery data set includes 0.75 meters digital orthoimages in 8-bit 3-band (RGB) GeoTIFF tiles and 8-bit 3-band (RGB) MrSID mosaics (20:1 compression ratio). Geographic Extent: 2 counties in Montana, covering approximately 23 total square miles. Dataset Description: The Big Sky Montana project called for the planning, acquisition, processing, and derivative products of imagery data to be collected at a ground sample distance (GSD) of 0.75 meters. Project specifications are based on the American Society of Photogrammetry and Remote Sensing (ASPRS) standards. The data were developed based on a horizontal projection/datum of NAD 1983 HARN StatePlane Montana FIPS 2500, Meter. Imagery data were delivered as 0.75 meters 8-bit 3-band (RGB) GeoTIFF tiles and 8-bit 3-band (RGB) MrSID mosaics (20:1 compression ratio). Tiled deliverables contained 74 individual 900 m x 900 m tiles. Ground Conditions: Imagery was collected in fall 2020, while no snow was on the ground and rivers were at or below normal levels. In order to post process the imagery data to meet task order specifications and meet ASPRS horizontal accuracy guidelines, Quantum Spatial, Inc. utilized a total of 16 ground control points to assess the horizontal accuracy of the data. These data depict geographic features on the surface of the earth. The dataset was created to current imagery data for Montana. Collected under a MLIA Grant FY2021. 20200901 20200904 Ground condition Complete None planned -111.432332167 -111.269606153 45.3101430246 45.2426870357 ISO 19115 Topic Categories imageryBaseMapsEarthCover None 0.75 meters orthoimage GeoTIFF rectified photograph rectified image orthophoto natural color orthophoto orthoimage image map None None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the organization providing these data to the public would be appreciated for products derived from these data. Quantum Spatial, Inc. Quantum Spatial, Inc. mailing and physical Lexington KY 40503 859-277-8700 859-277-8901 Monday through Friday 8:00 AM to 5:00 PM (Eastern Time) Big Sky Water and Sewer District No. 363 Vincent Palafox mailing and physical Big Sky MT 59716 US 406-283-1394 vince@wsd363.com Quantum Spatial, Inc. Three band orthoimagery is organized in three color bands or channels which represent the red, green, and blue (RGB) portions of the spectrum. Four band orthoimagery is organized in four color bands or channels which represent the red, green, blue (RGB), and near infrared (IR) portions of the spectrum. Each image pixel is assigned a triplet or quadruplet of numeric values, one for each color band. Numeric values range from 0 to 255. U.S. Department of the Interior, U.S. Geological Survey, 1996, Standards for Digital Orthophotos: Reston, VA. Big Sky Water and Sewer District No. 363 Vincent Palafox mailing and physical Big Sky MT 59716 US 406-283-1394 vince@wsd363.com Offline Data None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of their limitations. Acknowledgement of the organization providing these data to the public would be appreciated for products derived from these data. 20201215 Quantum Spatial, Inc. Quantum Spatial, Inc. mailing and physical Lexington KY 40503 859-277-8700 859-277-8901 Monday through Friday 8:00 AM to 5:00 PM (Eastern Time) FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time {32AABC19-5499-4DDD-B5D7-067D0F06C5F3}