GIS Data Catalog
Ground Control Monuments 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
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.
Layer information
| Layer Name | lidar_2016_groundctlmon_point |
| Subject Category | Survey |
| Title | Ground Control Monuments for 2016 King County/Puget Sound Lidar Consortium Lidar Project |
| Feature Count | 34 |
| Feature Type | Point |
| Next Update | None planned |
| Spatial reference | EPSG:2926 |
| Control ID | 2602 |
| Place Keywords | Pacific NW, King County, WA, Washington State |
| Theme Keywords | Survey, Lidar, Monuments, Ground Control Monuments |
| 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. |
|
PID
From Quantum Spatial |
Description
Monument identifier DomainUnique monument identifier |
|
X
From Quantum Spatial |
Description
Easting DomainEasting of the control monument in Washington State Plane North, US Survey Feet |
|
Y
From Quantum Spatial |
Description
Northing DomainNorthing of the control monument in Washington State Plane North, US Survey Feet |
|
Z
From Quantum Spatial |
Description
Elevation DomainElevation of the control monument, NAVD88, Geoid 03 |
|
CTLTYPE
From Quantum Spatial |
Description
Type of Monument DomainCORS - CORS type Monument - Monument type |
|
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
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.
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
| 8/27/2016 |
Acquisition. Quantum Spatial collected the PSLC King County LiDAR Delivery 4, Block 1 LiDAR data between 03/26/16 and 08/27/16. The survey used both a Leica ALS70 (service Pack 2) and 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. Sensor: Leica ALS80 (03/26/2016, 03/30/2016): Maximum returns: unlimited Nominal pulse density: 8 ppsm pulses/m^2 Nominal pulse spacing: .35 m AGL: 1200 m Speed: 145 knots FOV: 40° Scan frequency: 50.0 hz Pulse rate: 400 kHz Pulse duration: 2.5 ns Pulse width: 26.4 cm Wavelength: 1064 nm Pulses in air mode: Multiple Pulses in Air Beam divergence: 22 mrads Swath width: 874 m Overlap: 63% Sensor: Leica ALS80 (08/13/2016, 08/14/2016, 08/21/2016): Maximum returns: unlimited Nominal pulse density: 8 ppsm pulses/m^2 Nominal pulse spacing: .35 m AGL: 1450 m Speed: 100 knots FOV: 30° Scan frequency: 53.4 hz Pulse rate: 190.8 kHz Pulse duration: 2.5 ns Pulse width: 31.9 cm Wavelength: 1064 nm Pulses in air mode: Single Pulse in Air Beam divergence: 22 mrads Swath width: 777 m Overlap: 62% Sensor: Leica ALS70 (08/14/2016, 08/15/2016, 08/16/2016, 08/17/2016, 8/18/2016, 8/19/2016, 8/20/2016): Maximum returns: unlimited Nominal pulse density: 8 ppsm pulses/m^2 Nominal pulse spacing: .35 m AGL: 1450 m Speed: 100 knots FOV: 30° Scan frequency: 53.6 hz Pulse rate: 192.6 kHz Pulse duration: 9 ns Pulse width: 31.9 cm Wavelength: 1064 nm Pulses in air mode: Single Pulse in Air Beam divergence: 22 mrads Swath width: 777 m Overlap: 61% Sensor: Leica ALS70 (08/25/2016, 08/26/2016, 8/27/2016): Maximum returns: unlimited Nominal pulse density: 8 ppsm pulses/m^2 Nominal pulse spacing: .35 m AGL: 1650 m Speed: 100 knots FOV: 24° Scan frequency: 53.2 hz Pulse rate: 172.2 kHz Pulse duration: 9 ns Pulse width: 36.3 cm Wavelength: 1064 nm Pulses in air mode: Single Pulse in Air Beam divergence: 22 mrads Swath width: 701 m Overlap: 64% . |