Photo Science, A Quantum Spatial Company
20150415
Clinton-Essex-Lake Champlain New York 2015 LiDAR
USGS Contract: G10PC00026 Task Order Number: G10PC00026 and G14PD000943 (Modification)
NY_ClintonEssex_2015
model
Geographic Extent: Clinton-Essex-Lake Champlain New York, covering approximately 2,699 square miles. The Base order is 1,915 square miles with the Ausable area of interest covering 289 square miles and Saranac area of interest covering 429 square miles.
Dataset Description: Clinton Essex New York 2015 LiDAR project called for the Planning, Acquisition, processing and derivative products of LIDAR data to be collected at a nominal pulse spacing (NPS) of 0.7 meter. Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1. The data was developed based on a horizontal projection/datum of UTM Zone 18 North, NAD83, meters and vertical datum of NAVD1988 (GEOID12A), meters. LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.2 Files formatted to 1066 individual 1500 meter X 1500 meter tiles for the pilot (3243 individual 1500 meter X 1500 meter tiles for the entire project area), and corresponding Intensity Images and Bare Earth DEMs tiled to the same 1500 meter X 1500 meter tile schema, and Breaklines in Esri geodatabase format. Contours will also be delivered with Lot 5.
Ground Conditions: LiDAR was collected in spring of 2015, while no snow was on the ground and rivers were at or below normal levels. In order to post process the LiDAR data to meet task order specifications, Quantum Spatial established a total of 41 Land Cover control points that were used to calibrate the LIDAR to known ground locations established throughout the Clinton-Essex-Lake Champlain project area.
Classified LAS files are used to show the manually reviewed bare earth surface. This allows the user to create Intensity Images, Breaklines and Raster DEM.
The purpose of these lidar data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 1 meter cell size.
These raw lidar point cloud data were used to create classified lidar LAS files, intensity images, 3D breaklines, contours, hydro-flattened DEMs as necessary.
USGS Contract No. G10PC00026
CONTRACTOR: Quantum Spatial
Ground Control Points were acquired and calibrated by Photo Science, A Quantum Spatial Company
LiDAR data was acquired by both Photo Science, A Quantum Spatial Company and Kucera
Calibration and follow-on processing were completed by Photo Science, A Quantum Spatial Company
USGS-NGP Base Lidar Specification v1.0
Leica ALS 70
4
0.67
2.03
1859
105
20.0
27.3
153.8
4
0.40
1064
0
0.22
1292.09
37.46
NAD_1983_UTM_Zone_18N
National Geodetic Survey (NGS) Geoid12A
USGS-NGP Base Lidar Specification v1.0
Leica ALS 70
4
0.62
2.30
2310
160
14.0
52.2
243.2
4
0.53
1064
1
0.22
1151.90
21.34
NAD_1983_UTM_Zone_18N
National Geodetic Survey (NGS) Geoid12A
USGS-NGP Base Lidar Specification v1.0
Leica ALS 70
4
0.63
1.60
3090
150
20.0
34.6
193.4
4
0.32
1064
0
0.22
1002.13
29.41
NAD_1983_UTM_Zone_18N
National Geodetic Survey (NGS) Geoid12A
USGS-NGP Base Lidar Specification v1.0
Leica ALS 70
4
0.63
2.26
1098
150
20.0
41.0
193.4
4
0.32
1064
0
0.22
1002.00
27.90
NAD_1983_UTM_Zone_18N
National Geodetic Survey (NGS) Geoid12A
USGS-NGP Base Lidar Specification v1.0
Leica ALS 70
4
0.62
2.32
1038
150
19.5
41.5
194.0
4
0.32
1064
0
0.22
974.88
32.38
NAD_1983_UTM_Zone_18N
National Geodetic Survey (NGS) Geoid12A
-9999
0.153
0.130
0.255
High Grass, Weeds, and Crops
0.331
Brush Lands and Low Trees
0.036
Swamp/Wetland
0.309
1.2
1
Withheld (ignore) points were identified in these files using the standard LAS Withheld bit.
Swath "overage" points were identified in these files by adding 128 to the standard classification values.
8
20150429
20150507
ground condition
None planned
-74.4796547575124
-73.2943302055024
45.0199693074376
43.7758877121881
541500
636000
4986000
4848000
None
model
LAS Point Cloud
remote sensing
Elevation data
Lidar
Hydrology
None
New York
Clinton County
Essex County
Lake Champlain
No restrictions apply to these data.
None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no Longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of it's limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.
Photo Science, A Quantum Spatial Company, Data Acquisition Department
John DiGiovanni
mailing and physical
523 Wellington Way
Lexington
KY
40503
USA
859-277-8700
859-277-8901
jdigiovanni@quantumspatial.com
Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)
If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours.
Photo Science, A Quantum Spatial Company flew the LiDAR and processed the data.
MicroStation Version 8; TerraScan Version 15; TerraModeler Version 15; GeoCue Version 2014.1.21.1; ESRI ArcGIS 10.2; Global Mapper 15; ALS Post Processor 2.75 Build #25; Windows 7 Operating System \\psihq_nx3200\Projects\23902_ClintonEssex_NY_USGS\ 43.5 GB and \\Matrix\LIDAR\23902_NYClintonEssex_LakeChamplain 1.86 TB
Classified LAS files were tested by Quantum Spatial for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas.
Datasets contain complete coverage of tiles.
No points have been removed or excluded.
A visual qualitative assessment was performed to ensure data completeness.
There are no void areas or missing data. The raw point cloud is of good quality and data passes Fundamental Vertical Accuracy specifications.
The specifications require that only Fundamental Vertical Accuracy (FVA) be computed for raw lidar point cloud swath files.
The vertical accuracy value is the AccuracyZ at 95 percent Confidence Interval in meters. The FVA was tested using 41 independent survey check points located in open terrain. The survey checkpoints were distributed throughout the project area. The 41 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASRPS Guidelines.
0.130
The FVA was tested using 41 independent survey check points located in open terrain. The survey checkpoints were distributed throughout the project area. The 41 independent check points were surveyed using GPS techniques. See survey report for additional survey methodologies. Elevations from the unclassified lidar surface were measured for the x,y location of each check point. Elevations interpolated from the lidar surface were then compared to the elevation values of the surveyed control. The RMSE was computed to be 0.066 meters. AccuracyZ has been tested to meet 18.13 cm Fundamental Vertical Accuracy at 95 Percent confidence level using RMSE(z) x 1.9600 as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASRPS Guidelines.
Photo Science, A Quantum Spatial Company
20150415
Control Survey Report: San Diego, CA. Ortho and Lidar Task Order
vector digital data and tabular data
Lexington, KY
Photo Science, A Quantum Spatial Company
CD-ROM
2015
ground condition
NY_ClintonEssex_2015_LiDAR_ctrl
This data source was used (along with the airborne GPS/IMU Data) to aid in the georeferencing of the lidar point cloud data.
Photo Science, A Quantum Spatial Company
2015
Lidar RAW Data for San Diego 2014
lidar data
Photo Science, A Quantum Spatial Company
2015
online
20141027
20150217
ground condition
NY_ClintonEssex_2015_LiDAR_Data
This data source was used to populate the lidar point cloud data.
Calibration Control Point Creation:
Calibration control points were surveyed in the field using one Trimble R8-Model 3 GNSS receiver and one Trimble R8-Model 4 GNSS receiver. Each point was set on a flat surface at least five meters away from any significant elevation change and occupied for a minimum of 15 minutes. Each point also shares common time with at least one other control point within the project AOI. Data sheets for each point were filled out with information including point type, general location, occupation time, equipment used, and photographs. Final coordinates, point ties, and RMSE values were filled in after the post processed network adjustment.
Upon completion of the field survey, the observations were input into Trimble Business Center and CORS information was downloaded for NGS to create a static network. The calibration points were constrained to the CORS used and the final coordinate values were derived using a Least Squares adjustment.
The North American Datum of 1983 (NAD83 (2011)), UTM Zone 18N projection was used for reporting the horizontal coordinates in meters. The vertical elevations are North American Vertical Datum of 1988 (NAVD 88) utilizing the GEOID12A model and are reported in meters.
The calibration control point shape files were generated from XYZ text files using a combination of Global Mapper and ArcMap softwares.
NY_ClintonEssex_2015_LiDAR_ctrl
NY_ClintonEssex_2015_LiDAR_Data
2015
Lot4_QAQC_Review
Photo Science, A Quantum Spatial Company
Paul Bishop
mailing and physical
523 Wellington Way
Lexington
KY
40503
USA
859-277-8700
859-277-8901
pbishop@quantumspatial.com
Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)
If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours.
Vector
String
Universal Transverse Mercator
18
0.9996
-75.0
0.0
500000.0
0.0
coordinate pair
0.01
0.01
meter
North American Datum of 1983
Geodetic Reference System 80
6378137
298.257222101
North American Vertical Datum of 1988
0.01
meters
Explicit elevation coordinate included with horizontal coordinates
Calibration Control Points
An accurately surveyed coordinate location for a physical feature that can be identified on the ground. Control points are used in least-squares adjustments as the basis for improving the spatial accuracy of all other points to which they are connected.
Esri GIS Dictionary http://support.esri.com/en/knowledgebase/GISDictionary/term/control point
OID
Internal feature number.
Esri
Sequential unique whole numbers that are automatically generated.
Shape
Feature geometry.
Esri
Feature geometry - Point
ID
Name assigned to each control point
LiDAR Data
Control Point Name
Unique identifier assigned to each control point
Point numbers assigned by surveyor
X
Easting coordinate in project coordinate system for each control point
LiDAR Data
Control Point Easting
Easting coordinate in project coordinate system for each control point
Values are calculated by survey manager
Y
Northing coordinate in project coordinate system for each control point
LiDAR Data
Control Point Northing
Northing coordinate in project coordinate system for each control point
Values are calculated by survey manager
Z
Elevation in project coordinate system for each control point
LiDAR Data
Control Point Elevation
Elevation in project coordinate system for each control point
Values are calculated by survey manager
RASTERVALU
Observed elevation values in project coordinate system for each control point
LiDAR Data
Control Point Elevation
Elevation in project coordinate system for each control point
Values are calculated by survey manager
Calibration control points are used to finalize the calibration of the LiDAR data. Points are used to eliminate any vertical bias between the LiDAR dataset and the surveyed ground elevations.
More detail about the attributes of this data set can be found in LAS 1.2 specifications and USGS LiDAR Base Specification Version 1.0.
20150619
Photo Science, A Quantum Spatial Company
Ryan Elizabeth Bowe, GISP
mailing and physical
523 Wellington Way
Lexington
KY
40503
USA
859-277-8700
859-277-8901
rbowe@quantumspatial.com
Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)
If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours.
FGDC Content Standard for Digital Geospatial Metadata
FGDC-STD-001-1998
None.
None.
None.
Unclassified
NONE