| Section 1 | Overview | |||
| Originator | Dakota County | |||
| Title | Aerial Photography - 2019 - Spring, Dakota County, Minnesota | |||
| Abstract | Low level (6-inch) aerial photography for Dakota County flown in Spring 2019. Tested 1.03 feet horizontal accuracy at 95% confidence level. (Points indepedent of those used by vendor.)
Product: This orthoimagery data set includes 0.5-foot digital orthoimages in 8-bit 4-band (RGB-IR) GeoTIFF tiles, 8-bit 4-band (RGB-IR) MrSID tiles (20:1 compression), and an 8-bit 4-band (RGB-IR) MrSID mosaic (75:1 compression). Geographic Extent: 1 county in Minnesota, covering approximately 626 total square miles. Dataset Description: The Dakota County, MN 2019 Orthoimagery project called for the planning, acquisition, processing, and derivative products of imagery data to be collected at a ground sample distance (GSD) of 0.5-foot. 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 NAD83(96), Dakota County Coordinates, US Survey Feet. Imagery data were delivered as 0.5-foot 8-bit 4-band (RGB-IR) GeoTIFF tiles, 8-bit 4-band (RGB-IR) MrSID tiles (20:1 compression), and an 8-bit 4-band (RGB-IR) MrSID mosaic (75:1 compression). Tiled deliverables contained 614 individual irregular tiles. Ground Conditions: Imagery was collected in spring 2019, 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 27 ground control points to assess the horizontal accuracy of the data. | |||
| Purpose | Low level (6-inch) aerial photography for Dakota County flown in Spring 2019. Tested 1.03 feet horizontal accuracy at 95% confidence level. (Points indepedent of those used by vendor.) | |||
| Time Period of Content Date | Periodically Revised | |||
| Currentness Reference | Flown in Spring 2019. Flight dates between and including 20190423 and 20190507. | |||
| Progress | Complete | |||
| Maintenance and Update Frequency | None Planned | |||
| Spatial Extent of Data | Dakota County | |||
| Bounding Coordinates | -93.329853 -92.729236 44.923499 44.468748 | |||
| Place Keywords | Apple Valley, Burnsville,Castle Rock Township,Coates,Douglas Township,Eagan,Empire Township,Farmington,Greenvale Township,Hampton,Hampton Township,Hastings,Inver Grove Heights,Lakeville,Lilydale,Marshan Township,Mendota, Mendota Heights,Miesville,New Trier,Nininger Township,Northfield,Randolph, Randolph Township, Ravenna Township,Rosemount,Sciota Township,South St Paul,Sunfish Lake,Vermillion, Vermillion Township,Waterford Township,West St Paul,Dakota County | |||
| Theme Keywords | base map, imageryBaseMapsEarthCover, Digital Orthorectified Image, Ortho, Orthophoto, Air Photo, Air Photography, Aerial Photo, Aerial Photography | |||
| Theme Keyword Thesaurus | None | |||
| Access Constraints | None | |||
| Use Constraints | Dakota County GIS Database Disclaimer NOTICE: Dakota County Geographic Information System (GIS) Data are made available pursuant to the Minnesota Government Data Practices Act (Minnesota Statutes Chapter 13) THE GIS DATA ARE PROVIDED TO YOU AS IS AND WITHOUT ANY WARRANTY AS TO THEIR PERFORMANCE, MERCHANTABILITY, OR FITNESS FOR ANY PARTICULAR PURPOSE. The GIS Data were developed by Dakota County ("County") for their own internal business purposes. The County does not represent or warrant that the GIS Data or the data documentation are error-free, complete, current, or accurate. You are responsible for any consequences resulting from your use of the GIS Data or your reliance on the GIS Data. You should consult the data documentation for this particular GIS Data to determine the limitations of the GIS Data and the precision with which the GIS Data may depict distance, direction, location, or other geographic features. If you transmit or provide the GIS Data (or any portion of it) to another user, you must provide a copy of this disclaimer and the accompanying metadata for this dataset to the user. | |||
| Contact Person Information | Dakota County GIS,
Staff Dakota County GIS 14955 Galaxie Ave Apple Valley, Minnesota 55124 Phone: Email: gis@co.dakota.mn.us | |||
| Browse Graphic | Click to view a data sample.
Image Example | |||
| Associated Data Sets | ||||
| Section 2 | Data Quality | |||
| Attribute Accuracy | N/A | |||
| Logical Consistency | N/A | |||
| Completeness | Dakota County is covered. | |||
| Horizontal Positional Accuracy | Using NSSD methods this data tested 1.03 feet horizontal accuracy at 95% confidence level. | |||
| Lineage | This service contains imagery from Spring 2019. | |||
| Section 3 | Spatial Data Organization (not used in this metadata) | |||
| Section 4 | Coordinate System | |||
| Horizontal Coordinate Scheme | Minnesota County Coordinate System NAD83 | |||
| County Coordinate Zone Identifier | 45 | |||
| Horizontal Datum | NAD83 | |||
| Horizontal Units | feet | |||
| Section 5 | Attributes | |||
| Overview | None | |||
| Detailed Citation | None | |||
| Table Detail: | ||||
| Section 6 | Distribution | |||
| Publisher | Dakota County | |||
| Publication Date | periodically revised | |||
| Contact Person Information | Dakota County GIS,
Staff Dakota County GIS 14955 Galaxie Ave Apple Valley, Minnesota 55124 Phone: Email: gis@co.dakota.mn.us | |||
| Distributor's Data Set Identifier | base_aerialphotography_2019_sprg | |||
| Distribution Liability | ||||
| Ordering Instructions | See Online Linkage Below | |||
| Online Linkage | I AGREE to the notice in "Distribution Liability" above. Clicking to agree will either begin the download process, link to a service, or provide more instructions. See "Ordering Instructions" above for details. | |||
| Section 7 | Metadata Reference | |||
| Metadata Date | 11/05/2019 | |||
| Contact Person Information | Dakota County GIS,
Staff Dakota County GIS 14955 Galaxie Ave Apple Valley, Minnesota 55124 Phone: 952-891-7000 Email: gis@co.dakota.mn.us | |||
| Metadata Standard Name | Minnesota Geographic Metadata Guidelines | |||
| Metadata Standard Version | 1.2 | |||
| Metadata Standard Online Linkage | http://www.gis.state.mn.us/stds/metadata.htm | |||
