Photo Science, Inc.
2012
Coastal New York LiDAR (Tidal Water Raster DEM)
raster digital data
Hudson River Estuary Program
Coastal New York LiDAR
Albany, NY
New York State Department of Environmental Conservation (NYS DEC)
http://gis.ny.gov/elevation/DEM-1-Meter-NOAA.htm
ftp://ftporthos.dhses.ny.gov/lidar/dec_coastal_1m/dem/
http://www.orthos.dhses.ny.gov/
Tidal Water Raster Digital Elevation Model (DEM) derived from Light Detection and Ranging (LiDAR) data which is remotely sensed high-resolution elevation data collected by an airborne collection platform. This LiDAR dataset is a survey of areas of coastal New York, including Long Island, eastern Westchester, and the tidal extents of the Hudson River. This raster dataset is distinct from the Hydroflattened Raster DEM that was derived from the same LiDAR data in that LiDAR elevation data from tidal water surfaces has been retained so that elevations of intertidal areas that were exposed at lower tides during data acquisition are preserved. There is some uncertainty at any specific location about the boundary between water and exposed land in the intertidal zone.
The project was developed by the National Oceanic and Atmospheric Administration's (NOAA) Coastal Services Center in partnership with the New York State Department of Environmental Conservation (NYS DEC) to collect and deliver topographic elevation point data derived from multiple return light detection and ranging (LiDAR) measurements for areas of coastal New York including Long Island, eastern Westchester, and the tidal extents of the Hudson River. Data are intended for use in coastal management decision making, including applications such as detailed mapping of areas at risk of sea level rise according to projections developed by NYS and the remapping of Coastal Erosion Hazard Areas.
Raster DEM files are used to show the Digital Elevation Model of the LAS Class 2 surface. This allows the user to create contours.
Lifts were flown out of specific airports at which base stations were set up and, sometimes, specific tide stations were used, creating another break in areas.
1B1 contained 46 flight lines and was flown on January 9, 2012 and January 11, 2012 with Optech SN247 in N2448G.
20N contained 39 flight lines and was flown on February 19-20, 2012 with Optech SN247 in N2448G.
ALB contained 31 flight lines and was flown on January 7, 2012 and January 9, 2012 with Optech SN247 in N2448G.
FRG-NOAA contained 144 flight lines flown on February 2-6, 2012; February 9, 2012; February 13-14, 2012 with Optech SN247 in N2448G.
GON contained 15 flight lines flown on November 26, 2011 with Optech SN240 in N9471R.
HTO contained 92 flight lines flown on January 15-16, 2012; January 18, 2012; and January 20, 2012 with Optech SN247 in N2448G.
HWV contained 110 flight lines flown on January 25, 2012; January 28, 2012; January 30-31, 2012 with Optech SN247 in N2448G.
POU contained 94 flight lines flown on December 12-14, 2012; and December 16, 2012 with Optech SN240 in N9471R.
SWF-NOAA contained 32 flight lines flown on December 18-19, 2011 with Optech SN240 in N9471R.
HPN contained 37 flight lines flown on April 6-7, 2012 with Optech SN246 in N7266Z.
1B1-TID-HUDSON contained 5 flight lines and was flown on February 20, 2012 with Optech SN247 in N2448G.
HPN-TID-CROTON contained 5 flight lines flown on February 19, 2012 with Optech SN247 in N2448G.
HPN-TID-HARVEST contained 6 flight lines flown on February 19, 2012 with Optech SN247 in N2448G.
HPN-TID-PIERMON contained 4 flight lines flown on February 18, 2012 with Optech SN247 in N2448G
SWF-TID-IONA-MA contained 9 flight lines flown February 17, 2012 with Optech SN247 in N2448G.
SWF-TID-MARL-WA contained 5 flight lines flown February 17, 2012 with Optech SN247 in N2448G.
SWF-TID-MOOD-FI contained 7 flight lines flown February 17, 2012 with Optech SN247 in N2448G.
Reports:
Coastal NY Final Project Report, 2012
20111126
20111212
20111213
20111214
20111216
20111218
20111219
20120107
20120109
20120111
20120115
20120116
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20120120
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20120202
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20120209
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20120220
20120222
20120223
20120406
20120407
ground condition
Unknown
-74.051752
-71.853356
42.770847
40.571295
none
model
LiDAR
DEM
Raster
breaklines
remote sensing
None
Hudson River
Long Island
Albany
Kingston
Poughkeepsie
Yonkers
Great Neck
Larchmont
Shelter Island
Plum Island
Fishers Island
Gardiners Island
Montauk
Fire Island
Point Lookout
New York State
United States of America
None
None
1. The NYS DEC / NOAA asks to be credited in derived products.
2. Any documentation provided is an integral part of the data set. Failure to use the documentation in conjunction with the digital data constitutes misuse of the data.
3. Although every effort has been made to ensure the accuracy of information, errors may be reflected in the data supplied. The user must be aware of data conditions and bear responsibility for the appropriate use of the information with respect to possible errors, original map scale, collection methodology, currency of data, and other conditions.
4. Users should be aware that temporal changes may have occurred since this data set was collected and that some parts of this data may no longer represent actual surface conditions.
Photo Science, Inc. flew the LiDAR and processed the data.
MicroStation Version 8; TerraScan Version 12; TerraModeler Version 12; GeoCue Version 2011.1.20.4 (64-bit); ESRI ArcGIS 10.0; Global Mapper 13; Optech DashMAP 5.2000
Photo Science, Inc.
2013
Title: Coastal New York LiDAR (Hydro Flattened Raster DEM)
raster digital data
Albany, NY
New York State Department of Environmental Conservation
ftp://ftporthos.dhses.ny.gov/lidar/dec_coastal_1m/dem/
Photo Science, Inc.
Unpublished Material
Coastal New York LiDAR (NOAA Contract: EA133C11CQ0009 - T011)
digital point data
Photo Science, Inc.
Unpublished Material
Coastal New York LiDAR (Hydro Breaklines): (NOAA Contract: EA133C11CQ0009 - T011)
vector digital data
Department of Commerce (DOC), National Oceanic and Atmospheric Administration (NOAA), National Ocean Service (NOS),
Coastal Services Center (CSC)
2012
2011 - 2012 New York State Department of Environmental Conservation (NYSDEC) Lidar: Coastal New York (Long Island and along the Hudson River)
Charleston, SC
NOAA's Ocean Service, Coastal Services Center (CSC)
Once at the online linkage, narrow your geographic scope; at 2nd checkout step you have the option to edit your choices to obtain point data in various formats including LAS format OR a raster file (a provisional DEM) OR topographic contours in either shapefile or DXF format, created from LiDAR returns that have been classified as ground.
http://www.csc.noaa.gov/dataviewer/index.html?action=advsearch&qType=in&qFld=ID&qVal=1408
http://www.csc.noaa.gov/lidar
http://www.csc.noaa.gov
http://www.csc.noaa.gov/htdata/lidar1_z/geoid12a/data/1408
Photo Science, Inc.
Unpublished Material
Coastal New York LiDAR (V-Datum Raster DEM): (NOAA Contract: EA133C11CQ0009 - T011)
raster digital data
Photo Science, Inc.
2013
Coastal New York LiDAR Data Acquisition and Processing POST-FLIGHT AERIAL ACQUISITION AND CALIBRATION REPORT
Dewberry
2012
LiDAR Quality Assurance (QA) Report Coastal New York LiDAR
ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/ny/nysdec/Coastal_NY_Priority1_Dewberry_QA_Report.pdf
Dewberry
2012
LiDAR Quality Assurance (QA) Report Coastal New York LiDAR
ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/ny/nysdec/Coastal_NY_Priority2_Dewberry_QA_Report.pdf
NOAA Coastal Services Center
2012
LiDAR 101: An Introduction to LiDAR Technology, Data, and Applications
http://www.csc.noaa.gov/digitalcoast/_/pdf/lidar101.pdf
US Geological Survey
Hans Karl Heidemann
2012
Lidar Base Specification Version 1.0
http://pubs.usgs.gov/tm/11b4/TM11-B4.pdf
The project area required LiDAR to be collected on 1.0 meter ground sample distance (GSD) or better and processed
to meet a bare earth vertical accuracy of 15.0 centimeters RMSEz or better.
Raw Flightlines, Classified LAS files, Breaklines, and Raster DEMs were tested by Photo Science
for both vertical and horizontal accuracy. Although collected on a tile-by-tile basis, breaklines are merged together to produce a single deliverable dataset. Checks are done to ensure that the data is seamless from one tile to the next before being combined and that breaklines meeting the project requirements have been collected across the entire project area. Combining the breaklines with LiDAR data to create other deliverables is another check of the data. All data are seamless from one tile to the next, no gaps or no data areas.
Datasets contain complete coverage of project area and tiles.
Data collected to meet 50 cm RMSE.
Deliverables were tested by Photo Science for both vertical and horizontal accuracy. All data is seamless from one tile to the next, no gaps or no data areas. Although collected on a tile-by-tile basis, breaklines are merged together to produce a single deliverable dataset. Checks are done to ensure that the data is seamless from one tile to the next before being combined and that breaklines meeting the project requirements have been collected across the entire project area. The vertical unit of the data file is in decimal meters with 2-decimal point precision. Combining the breaklines with LiDAR data to create other deliverables is another check of the data. The reported RMSEz value was determined using the calibration control points, and not the Blind Control. The calibration control points are the same points that were used to remove any bias in the dataset before bare earth editing.
The listed RMSEz value shown below was calculated from the ground (ASPRS Class 2) data in the final Classified LAS file.
0.15
RMSE in meters, as calculated from Classified LAS files. The LiDAR data vertical accuracy is in compliance with the National Standard for Spatial Data Accuracy (NSSDA) RMSE estimation of elevation data in support of 1 ft. contour mapping products.
Photo Science, Inc.
2011
Control
digital data
hard drive
2011
ground condition
CTRL
Control points are used as a known elevation to adjust the LiDAR data to the surface.
Photo Science, Inc.
2012
LiDAR
digital data
hard drive
20111126
20120407
ground condition
LiDAR
LiDAR points were used to produce the deliverables.
Data Aquisition: GMR Aerial Surveys Inc. d/b/a Photo Science, Inc. acquired 740 flight lines in 63 lifts between November 2011 and April 2012, while no snow was on the ground, rivers were at or below normal levels, no strong onshore winds, high waves, floods, or other anomalous weather conditions. Real Time Kinematic (RTK) survey methodology was typically performed using the New York State Spatial Reference Network (NYSNet), a CORS/Real Time GPS Network.
Specified areas of the project were collected at a tide stage where water levels are at least 1-foot below mean sea level (MSL). The data collection was performed with three Cessna 206 single engine aircrafts, utilizing Optech Gemini sensors; collecting multiple return x, y, and z as well as intensity data.
NOAA tide gauges were used as the basis for flight planning the tidally coordinated areas. The Stevens Institute’s NY Harbor Observation and Prediction System (NYHOPS) data were used to confirm accuracy of NOAA predicted tides in Hudson. Some areas were collected using tidal restaints as listed below:
Tidal Wetlands and tributary mouths selected for tidal coordination at Mean Sea Level (MSL) minus 1 foot were:
Rondout Creek Outlet; Vanderburg Cove, Moodna Creek, Constitution Marsh, Iona Marsh, Annsville Creek, Croton River
Outlet, Marlboro Marsh, Manitou Marsh, Fishkill Creek Outlet, and Wappingers Creek Outlet. The Upper Hudson area from North
of Goose Island was also collected to the same specification.
Tidal Wetlands and tributary mouths selected for tidal coordination at Mean Sea Level (MSL) were:
Haverstraw at Minisceongo Creek and Piermont Marsh. On Long Island the following areas were collected at MSL: 1)the northern shore of Nassau and Suffolk counties from approximately Glen Cove on the western boundary to Nissequogue on the eastern boundary, 2)the Peconic Bay from Riverhead on the western boundary to the east end of Shelter Island and Accabonac Harbor on the eastern boundary and 3)western Great South Bay.
The remainder of the project area had no tidal restrictions for collection. LAS tiles indicate if they are tidally coordinated or not. If tidal coordination only covers part of the tile the tile will be labeled tidally coordinated (i.e.MSL-1).
2011-2012
Control Process: Photo Science, Inc. established a total of 81 control points that were used to calibrate the LiDAR to known ground locations established throughout the New York project area to be used in the post processing of the LiDAR data. The points were located on relatively flat terrain on surfaces that generally consisted of grass, gravel, pavement or bare earth and were in well-defined discrete locations. Additionally, points collected for Photo Science from various projects located in the region were also used to adjust the LiDAR data to the final elevation. Surveyed points were used from the Northeast LiDAR and Fire Island, NY LiDAR projects for United States Geological Survey (USGS). See Final Survey Reports for additional collection parameters and methodologies.
2011
Classification Process:
The data were classified as Unclassified (1), Ground (2), Low Point (Noise) (7), Inland Water (9), Breakline Edge (10), Withheld (11), Tidal Water (14), Overlap Default (17), Overlap Ground (18), Overlap Water (25), and Overlap Tidal Water (30). The Classification classes are determined by the USGS Version 1.0 specifications and are an industry standard for the classification of the LIDAR point clouds. All data starts the process as Class 1 (Unclassified). Then through automated classification routines, classifications are determined using TerraScan macro processing. The bare earth surface is then manually reviewed to ensure correct classification on the Class 2 (Ground) points. After this surface is finalized, the bare earth surface is used to generate all hydro-breaklines through heads-up digitization. Once these breaklines are finalized, the breaklines are used to classify the points inside the breaklines to the appropriate classes. For example, the inland lakes/ponds are classified to Class 9. Also, the coastal shoreline breaklines are used to classify the points from the Class 2 (Ground) to Class 14 (Tidal Water). Elevation values were assigned to all Inland Ponds and Lakes, Inland Pond and Lake Islands, Inland Stream and River Islands,using TerraModeler functionality. Elevation values were assigned to all Inland streams and rivers using Photo Science proprietary software. Final elevations on the Tidal Water breaklines were determined by interpolation from the Mean High Water elevations provided through the New York Harbor Observing and Prediction System (NYHOPS) surface model.
2012
Hydro Flattening Breakline Process:
Class 2 LiDAR was used to create a bare earth surface model. The surface model was then used to heads-up digitize 2D breaklines of inland streams and rivers with a 30 meter nominal width and Inland Ponds and Lakes of 8,000 sq. meters or greater surface area. Tidal Shoreline and Tidal Island features were collected in a 2D collection method during an overall review of the surface models to determine the land water breaklines. These features were used to determine the classification within the Classified LAS files. These features can be used to represent a flat water surface, but were not run through the same project quality control procedures as the inland water body features. Elevation differences between ocean shoreline and ocean islands will be found. This is due in large part to the coastal water elevation changes, found between missions, as well as flightline to flightline. Final elevations on the Tidal Water breaklines was determined by interpolation from the Mean High Water elevations provided through the New York Harbor Observing and Prediction System (NYHOPS) surface model.
2012
Tidal Water Raster DEM Process:
Using automated scripting routines within ArcMap, the ground (ASPRS Class 2), inland water (class 9) and tidal water (Class 14) were combined with the Hydro Flattened Breaklines (excluding the Tidal/Ocean Shoreline and Tidal/Ocean Island line types) to create the 1.0 meter DEM. The data found on the tidal water (Class 14) are points located at or near the water surface. These points will cause the tidal water surface to look irregular, showing wave patterns, larger triangles in areas where the LIDAR points have been absorbed by water, or near vertical triangulation around pier, headwalls, etc. When using tidal water (Class 14) points as part of the bare earth surface, this type of triangulation is normal. While efforts were made to remove any extraneous features above the surface of the water, residual artifacts may remain in some areas.
ERDAS IMG files were then created as a check of the surface model. The files were reviewed and verified for completeness.
ERDAS IMAGINE (.img) files were the project deliverable.
A manual QA review of the tiles was completed in ArcMap and Global Mapper to ensure full coverage with no gaps or slivers within the project area for each deliverable dataset.
LiDAR
2012
LiDAR post-processed data
DEM
Hydro Flattening Breaklines
Quality Assurance: Dewberry conducted a quality assurance analysis of the data products produced by Photo Science including the LiDAR all-return LAS point cloud data, breaklines, and the Hydro-enforced Digital Elevation Model.
2012
Raster
Pixel
3000
1855
1
Universal Transverse Mercator
18
0.999600
-75.000000
0.000000
500000.000000
0.000000
row and column
1.000000
1.000000
meters
North American Datum of 1983
Geodetic Reference System 80
6378137.000000
298.257222
North American Vertical Datum 1988
0.15
meters
Explicit elevation coordinate included with horizontal coordinates
New York State Department of Environmental Conservation
Division of Information Services GIS Unit
mailing and physical address
625 Broadway
3rd Floor
Albany
NY
12233-2751
(518) 402-9862
(518) 402-9031
EnterpriseGIS@gw.dec.state.ny.us
New York State Department of Environmental Conservation provides these geographic data "as is." New York State Department of Environmental Conservation makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. New York State DEC further makes no warranty, either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on a computer system at New York State Department of Environmental Conservation, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. New York State Department of Environmental Conservation shall not be held liable for improper or incorrect use of the data described and/or contained herein.
New York State Department of Environmental Conservation
Hudson River Estuary Program
mailing and physical address
21 South Putt Corners Road
New Paltz
NY
12561
845-256-3016
hrep@gw.dec.state.ny.us
New York State Department of Environmental Conservation provides these geographic data "as is." New York State Department of Environmental Conservation makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. New York State DEC further makes no warranty, either expressed or implied, regarding the condition of the product or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on a computer system at New York State Department of Environmental Conservation, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. New York State Department of Environmental Conservation shall not be held liable for improper or incorrect use of the data described and/or contained herein.
20130826
Photo Science, Inc.
Michael Shillenn
mailing and physical address
523 Wellington Way, Suite 375
Lexington
KY
40503
USA
859-277-8700
mshillenn@photoscience.com
FGDC Content Standards for Digital Geospatial Metadata
FGDC-STD-001-1998
local time
http://www.esri.com/metadata/esriprof80.html
ESRI Metadata Profile