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"

 

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

Description | Contacts | Attribute Information | Constraints

Data layer thumbnail image

Description

Layer name: LIDAR_2016_GROUNDCTLMON
Subject category: survey
Title: Ground Control Monuments for 2016 King County/Puget Sound Lidar Consortium Lidar Project
Feature Count: 34
Feature Type: Point
Abstract: All ground control monuments utilized for the PSLC King County Lidar dataset. Ground control monuments are used to provide redundant control within 13 nautical miles of mission areas for Lidar flights, as well as the collection of ground control points using real-time kinematic (RTK) and post-precessed kinematic (PPK) survey techniques. 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 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, monuments, ground control monuments,
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
_PID_Monument identifierUnique monument identifier
_X_EastingEasting of the control monument in Washington State Plane North, US Survey Feet
_Y_NorthingNorthing of the control monument in Washington State Plane North, US Survey Feet
_Z_ElevationElevation of the control monument, NAVD88, Geoid 03
_CTLTYPE_Type of Monument
Unknown type
CORSCORS type
MonumentMonument type


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.