King County GIS Center
King Street Center
201 S. Jackson St.
Suite 706
Seattle, WA 98104
giscenter@kingcounty.gov

+ 47.59909 N
- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"

 

Orthophoto Ground Control Locations and Image Error Calculations

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image

Description

Layer name: PHOTO_CONTROL
Subject category: survey
Title: Orthophoto Ground Control Locations and Image Error Calculations
Feature Count: 0
Feature Type: Point
Abstract: Location of painted targets, as point features, used during aerial imagery photo acquisition. Data comes from multiple sources, and various vintages. Older vintage locations may not be visible in newer imagery, especially imagery greater than 1-foot resolution. Locations contain x,y and z coordinates.
Purpose: Use in orthorectification projects as ground control targets.
Status: Complete
Updated: As needed
Time period of content: (single date,as YYYYMMDD):: 20100201
Time period of content: (date range, as YYYYMMDD):: -
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Yes
Place Keywords: Pacific NW, Washington state, King County, WA,
Theme Keywords: aerial imagery, survey, reference grids, imageryBaseMapsEarthCover,
Lineage: Available
Supplemental Information: None

Contacts

Maintained by:
King County GIS Center
Primary: Mike Leathers, GIS Data Coordinator, 206-263-4867
(How to e-mail a County contact)
Secondary: KCGIS Center; giscenter@kingcounty.gov. This mailbox is monitored during business hours.

Attribute Information

ItemDescriptionDomain
_SERIAL_ID_Unique table record identifier (primary key)
Range Min:102
Range Max:290
_NAME_Point identifier as provided by sourceAlpha numeric name for point as provided by source
_EASTING_State Plane Easting (x) CoordinateFloating point
_NORTHING_State Plane Northing (y) CoordinateFloating point
_ELEVATION_Elevation of survey point in feet
Range Min:0.00000000
Range Max:2655.00000000
_CONTROLSET_Source of data
eCityGov_BellevueeCityGov Photo Project (Spring 2009) Bellevue area
eCityGov_MaineCityGov Photo Project (Spring 2009) main project area
eCityGov_WHPeCityGov Photo Project (Spring 2009)
eCityGov_WHP_2eCityGov Photo Project (Spring 2009)
Kingcounty_2002King County 2002 OrthoPhoto project
Kingcounty_2006King County 2006
NewControlB2010 iTen Associates - King County Orthophoto project
NovHillRoad_2007King County 2007 Novelty Hill Road Project
Rentrasta_2006King County 2006 Renton Road Project
SeattleCity of Seattle 2009 control set for Pictometry 2009 acquisition
_DESCR_Description of pointDescription of point if available
_TILE_ABBLC_7500-foot tiling index identifierrow-column identifier for 7500-foot cell where point is located
_X_09C100_2009 Aerials Express CIR Project - eastingFloating point
_Y_09C100_2009 Aerials Express CIR Project - northingFloating point
_ST_09C100_2009 Aerials Express CIR Project - point status
0Point not used as ground control or in error analysis
2Point held in blind and used in error analysis
_PCX_09C100_Photo value - Control value for easting for 2009 Aerials ExpressFloating point
_PCY_09C100_Photo value - Control value for northing for 2009 Aerials ExpressFloating point
_ADX_09C100_Absolute value in difference in x value for 2009 Aerials ExpressFloating point
_ADY_09C100_Absolute value of difference in y value for 2009 Aerials ExpressFloating point
_ALL_09C100_Sum of absolute x and absolute y for 2009 Aerials ExpressFloating point
_X_09N025_2009 eCityGov NatColor Project - eastingFloating point
_Y_09N025_2009 eCityGov NatColor Project - northingFloating point
_ST_09N025_2009 eCityGov NatColor Project - point status
1Point used as control in orthorectification and in error analysis
2Point held in blind for use in error analysis
0Point not found or used in analysis
_PCX_09N025_Photo value - Control value for easting value for 2009 eCity GovFloating point
_PCY_09N025_Photo value - Control value for y for 2009 eCity GovFloating point
_ADX_09N025_Absolute value of difference in x value for 2009 eCityGovFloating point
_ADY_09N025_Absolute value of y difference for 2009 eCityGovFloating point
_ALL_09N025_Sum of absolute x error and absolute y error for eCityGovFloating point
_ST_09N050_2009 Pictometry Project - point status
0Point not found or not used in analysis
2Point held in blind (not used in orthorectification
_X_09N050_Easting value for position of control in imageFloating point
_Y_09N050_Northing value for position of control in imageFloating point
_PCX_09N050_Photo value - Control value for 2009 PictometryFloating point
_PCY_09N050_Photo value - Control value for 2009 Pictometry
_ADX_09N050_Absolute value difference in x for 2009 PictometryFloating point
_ADY_09N050_Absolute value of y difference in 2009 PictometryFloating point
_ALL_09N050_Sum of absolute x error and absolute y error for 2009 PictometryFloating point
_X_10N050_2009 King County NatColor Project - eastingFloating point
_Y_10N050_2009 King County NatColor Project - northingFloating point
_ST_10N050_2009 King County NatColor Project - status
0Point not used as control or in error analysis
1Point used as control in orthorectification and in error analysis
2Point held in blind and used only in error analysis
_PCX_10N050_Photo value - Control value for 2010 iTenFloating point
_PCY_10N050_Photo value - Control value for y for 2010 iTenFloating point
_ADX_10N050_Absolute value of difference of x value for 2010 iTenFloating point
_ADY_10N050_Absolute value difference in y for 2010 iTenFloating point
_ALL_10N050_Sum of absolute x error and absolute y errorFloating point
_DESCRIPTION_
_VINTAGE_
_STATUS_
_PREMARK_
_ENTITYNAME_


Constraints

Access: None

Use: King County data are made available with the understanding that they shall be used exclusively by the obtainer or his/her authorized agents. Digital products may not be reproduced or redistributed in any form or by any means without the express written authorization of King County.