GIS Data Catalog
RTK Ground Control Points for 2016 King County/Puget Sound Lidar Consortium Lidar Project
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Summary
Provide support for high resolution terrain elevation data from the PSLC King County LiDAR dataset.
Description
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.
Layer information
| Layer Name | lidar_2016_groundcontrol_point |
| Subject Category | Survey |
| Title | RTK Ground Control Points for 2016 King County/Puget Sound Lidar Consortium Lidar Project |
| Feature Count | 4046 |
| Feature Type | Point |
| Next Update | None planned |
| Spatial reference | EPSG:2926 |
| Control ID | 2601 |
| Place Keywords | Pacific NW, King County, WA, Washington State |
| Theme Keywords | Survey, Lidar, RTK, Realtime Kinematic, Ground Control Point, GCP |
| Supplemental Information |
http://www5.kingcounty.gov/sdc/addl_doc/KingCounty2016LidarProjectDocumentation.htm |
Table Preview
Attribute information
|
OBJECTID
From Esri |
Description
Internal feature number. DomainSequential unique whole numbers that are automatically generated. |
|
X
From Quantum Spatial |
Description
Easting DomainEasting of the control point in Washington State Plane North, US Survey Feet |
|
Y
From Quantum Spatial |
Description
Northing DomainNorthing of the control point in Washington State Plane North, US Survey Feet |
|
Z
From King County |
Description
Elevation DomainElevation of the control point, NAVD88, Geoid 03 |
|
Shape
From Esri |
Description
Feature geometry. DomainCoordinates defining the features. |
Contact information
| Maintained by | KCGIS Center |
| Primary |
KCGIS Center
giscenter@kingcounty.gov |
Terms of Use
| License | Terms of use and copyright |
Use this Data
|
Links
How to use in ArcGIS Pro |
|
| Sharing Status | Public |
Summary
Provide support for high resolution terrain elevation data from the PSLC King County LiDAR dataset.
Description
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.
Contact information
| Maintained by | KCGIS Center |
| Primary |
KCGIS Center
giscenter@kingcounty.gov |
Terms of use and copyright
| License | Terms of use and copyright |
Change history
| 3/28/2017 |
Acquisition. Quantum Spatial collected the PSLC King County Delivery 1 LiDAR data between 02/24/16 and 03/28/16. The survey used a Leica ALS80 laser system mounted in a Cessna Caravan 208B. Data was collected using a multi pulse flight plan. Near nadir scan angles were used to increase penetration of vegetation to ground surfaces. Ground level GPS and aircraft IMU were collected during the flight. Leica ALS80 Instrument Parameters (03/08/2016, 03/11/2016, 03/19/2016): Beam diameter: 26 cm, Pulse rate: 400 kHz, Maximum returns: 4, Speed: 145 knots, Overlap: 63 %, Laser power: 93.7 %, Field of view (FOV): 40°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 874 m, AGL: 1200 m, Average pulse density: 8 ppms Leica ALS80 Instrument Parameters (02/24/2016 - 03/05/2016, 03/18/2016, 03/28/2016): Beam diameter: 35 cm, Pulse rate: 340 kHz, Maximum returns: 4, Speed: 145 knots, Overlap: 63 %, Laser power: 93.7 %, Field of view (FOV): 30°, Beam wavelength: 1064 nm, Frequency of GPS sampling: 2 Hz, Frequency of IMU sampling: 200 Hz, Swath width: 857 m, AGL: 1600 m, Average pulse density: 8 ppms . |