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Seattle, WA 98104
giscenter@kingcounty.gov

+ 47.59909 N
- 122.33136 W

+ 47°  35' 56.72"
- 122° 19' 52.90"

 

RTK Ground Control Points for 2016 King County/Puget Sound Lidar Consortium Lidar Project

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image

Description

Layer name: LIDAR_2016_GROUNDCONTROL
Subject category: survey
Title: RTK Ground Control Points for 2016 King County/Puget Sound Lidar Consortium Lidar Project
Feature Count: 4046
Feature Type: Point
Abstract: RTK (real time kinematic) ground control points collected for the PSLC King County Delivery Lidar dataset. RTK ground control points are used during the calibration process to help refine the vertical accuracy of the LiDAR data. Data was processed in reference to NAD83 (CORS96), however the horizontal datum for this dataset is defined as NAD83 (HARN) as the difference is generally small and allows for greater ease of use with data in different datums. The vertical datum is NAVD88, Geoid 03, and the data is projected in Washington State Plane North. Units are in US Survey Feet. Quantum Spatial collected the PSLC King County Delivery Lidar data for the Puget Sound LiDAR Consortium between 02/24/16 and 05/25/17.
Purpose: Provide support for high resolution terrain elevation data from the PSLC King County LiDAR dataset.
Status: Complete
Updated: None planned
Time period of content: (single date,as YYYYMMDD)::
Time period of content: (date range, as YYYYMMDD):: 20160224 - 20170525
Spatial reference: WA State Plane North
FGDC Documentation: Classic or FAQ
Open Data Availability: Yes
Place Keywords: Pacific NW, King County, WA, Washington state,
Theme Keywords: survey, lidar, RTK, realtime kinematic, ground control point, GCP,
Lineage: Available
Supplemental Information: http://www5.kingcounty.gov/sdc/addl_doc/KingCounty2016LidarProjectDocumentation.htm

Contacts

Maintained by:
King County GIS Center
Primary: Mike Leathers, GIS Data Coordinator, 206-477-4403
(How to e-mail a County contact)
Secondary: KCGIS Center; giscenter@kingcounty.gov. This mailbox is monitored during business hours.

Attribute Information

ItemDescriptionDomain
_X_EastingEasting of the control point in Washington State Plane North, US Survey Feet
_Y_NorthingNorthing of the control point in Washington State Plane North, US Survey Feet
_Z_Elevation Elevation of the control point, NAVD88, Geoid 03


Constraints

Access: Access Constraint: Data is available on GIS Data Portal: http://www5.kingcounty.gov/gisdataportal/Default.aspx

Use: Use Constraint: 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.