Digital Orthophotos

Metadata: Washington County, MN 1:1200 Digital Color Orthophotography 2009

Washington County, MN 1:1200 Digital Color Orthophotography 2009

This page last updated: 2009
Metadata created using Minnesota Geographic Metadata Guidelines

Metadata Summary

Originator Washington County Survey and Land Management Division
Abstract This metadata record describes the digital orthophotos produced for Washington County, MN in 2009. This 1:1200 scale orthophotography is comprised of natural color digital images collected with a GSD (Ground Sample Distance) of 0.5'. Imagery was collected using Leica ADS40 digital sensors.
Browse Graphic None available
Time Period of Content Date 04/14/2009
Currentness Reference Ground condition
Access Constraints N/A
Use Constraints Unknown
Distributor Organization Washington County Survey and Land Management Division
Ordering Instructions Contact: Washington County Survey and Land Management Division (651) 430-6875
Online Linkage None available

Full Metadata

Washington County, MN 1:1200 Digital Color Orthophotography 2009

Go to Section:
1. Identification Information
2. Data Quality Information
3. Spatial Data Organization Information
4. Spatial Reference Information
5. Entity and Attribute Information
6. Distribution Information
7. Metadata Reference Information

Section 1 Identification Information
Top of page
Originator Washington County Survey and Land Management Division
Title Washington County, MN 1:1200 Digital Color Orthophotography 2009
Abstract This metadata record describes the digital orthophotos produced for Washington County, MN in 2009. This 1:1200 scale orthophotography is comprised of natural color digital images collected with a GSD (Ground Sample Distance) of 0.5'. Imagery was collected using Leica ADS40 digital sensors.
Purpose A digital orthophoto is a geometrically accurate photographic record of landscape conditions at the time of the corresponding aerial photography. As such, the digital orthophoto is useful for a variety of applications, such as environmental monitoring, facility engineering/maintenance, city/county planning, property line review, etc. The digital orthophoto can be used alone or as a raster basemap for corresponding vector line mapping.
Time Period of Content Date 04/14/2009
Currentness Reference Ground condition
Progress Complete
Maintenance and Update Frequency Unknown
Spatial Extent of Data
Bounding Coordinates -93.0505
-92.7130
45.2980
44.7259
Place Keywords Washington County, Minnesota
Theme Keywords Aerial image, ADS40, Basemap, Digital Orthophoto, Orthophoto
Theme Keyword Thesaurus KI Thesaurus
Access Constraints N/A
Use Constraints Unknown
Contact Person Information John Baer, Survey Project Coordinator
Washington County Survey and Land Management Division
14949 62nd Street North
Stillwater, MN 55082
Phone: 651-430-6883
FAX: 651-430-6888
E-mail: john.baer@co.washington.mn.us
Browse Graphic None available
Browse Graphic File Description
Associated Data Sets


Section 2 Data Quality Information Top of full metadata Top of page
Attribute Accuracy
Logical Consistency Compliance with the accuracy standard was ensured by the placement of GPS ground control prior to the acquisition of aerial imagery. The following checks were performed: 1. The ground control and airborne GPS/INS data stream were validated through an aerotriangulation bundle adjustment using Leica's ORIMA and CAP-A software. 2. Digital orthophotography was validated through a visual inspection of control points, edge matching and general image quality.
Completeness The following methods were used to ensure image quality: 1. Use of targeted ground control during image acquisition. 2. Use of GPS/INS during image acquisition. 3. Checking of controls against ortho product. 4. Post ortho accuracy approval checks for overall image quality (tone, color balance, etc.).
Horizontal Positional Accuracy Tested 2.0 feet horizontal accuracy at 95% confidence level.
Vertical Positional Accuracy None
Lineage Kucera International Inc.
Source Scale Denominator 1200

Section 3 Spatial Data Organization Information Top of full metadata Top of page
Native Data Set Environment Raster
Geographic Reference for Tabular Data
Spatial Object Type Raster
Vendor Specific Object Types
Tiling Scheme The tile definition contains the name and bounding coordinates for each tile in the image index and is used to cut orthorectified imagery into manageable, usable images. The tiles are 6000 x 6000 feet projected in the Washington County State Plane Coordinate system.

Section 4 Spatial Reference Information Top of full metadata Top of page
Horizontal Coordinate Scheme Other
Ellipsoid GRS80
Horizontal Datum NAD83
Horizontal Units Feet
Distance Resolution Altitude Datum NAVD88

Section 5 Entity and Attribute Information Top of full metadata Top of page
Entity and Attribute Overview Color orthophotos are comprised of pixels. Each pixel is assigned a value of 0 to 255. That number will refer to a color look-up table which contains red, green and blue (RGB) values, each from 0 to 255, for that pixel within the image.
Entity and Attribute Detailed Citation None

Section 6 Distribution Information Top of full metadata Top of page
Publisher Washington County Survey and Land Management Division
Publication Date 2009
Contact Person Information John Baer
Survey Project Coordinator
Washington County Survey and Land Management Division
14949 62nd Street North
Stillwater, MN 55082
Phone: 651-430-6883
FAX: 651-430-6888
E-mail: john.baer@co.washington.mn.us
Distributor's Data Set Identifier
Distribution Liability The Washington County Survey and Land Management Division provides the geographic data as is. This organization makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Also, this organization makes no warranty, either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these files have been processed successfully on computers at this organization, no warranty is made by this organization regarding the use of these data on any other system, nor does the fact of distribution constitute or imply such a warranty.
Transfer Format Name TIFF (.tif) or MrSID (.sid) ECW (.ecw)
Transfer Format Version Number
Transfer Size
Ordering Instructions Contact: Washington County Survey and Land Management Division (651) 430-6875
Online Linkage None available

Section 7 Metadata Reference Information Top of full metadata Top of page
Metadata Date 2009
Contact Person Information John Baer, Survey Project Coordinator
Washington County Survey and Land Management Division
14949 62nd Street North
Stillwater, MN 55082
Phone: 651-430-6883
FAX: 651-430-6888
E-mail: john.baer@co.washington.mn.us
Metadata Standard Name Minnesota Geographic Metadata Guidelines
Metadata Standard Version FGDC-STD-001-19
Metadata Standard Online Linkage /metadata


This page last updated: 2009