GEOGRAPHIC INFORMATION

Big Sky County Water and Sewer District No. 363

Data Provider Quantum Spatial, Inc., Quantum Spatial, Inc.
Date 09/01/2020 - 09/04/2020
Content Type Downloadable Data
Abstract 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.
Purpose 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.
Supplemental Information
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be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions.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.
Data Access
Distributor Vincent Palafox Big Sky Water and Sewer District No. 363
Big Sky, MT 59716
Telephone: 406-283-1394
TDD/TTY:
Fax:
Email: vince@wsd363.com
Distribution liability 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be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions.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.
View Metadata
View Metadata (XML)
Metadata date 12/15/2020

Page History