2008 FEMA Bare-Earth Lidar: West Creek, Schoharie County (NY)
Data Set (DS) | OCM Partners (OCMP)GUID: gov.noaa.nmfs.inport:49884 | Updated: August 9, 2022 | Published / External
Item Identification
Title: | 2008 FEMA Bare-Earth Lidar: West Creek, Schoharie County (NY) |
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Short Name: | ny2008_fema_schoharie_be_m5043_metadata |
Status: | Completed |
Publication Date: | 2008-08 |
Abstract: |
Terrain data, as defined in FEMA Guidelines and Specifications, Appendix N: Data Capture Standards, describes the digital topographic data that was used to create the elevation data representing the terrain environment of a watershed and/or floodplain. Terrain data requirements allow for flexibility in the types of information provided as sources used to produce final terrain deliverables. Once this type of data is provided, FEMA will be able to account for the origins of the flood study elevation data. (Source: FEMA Guidelines and Specifications, Appendix N, Section N.1.2). Reflective surface data represents the DEM created by laser energy reflected from the first surface encountered by the laser pulse. Some energy may continue beyond this initial surface to be reflected by a subsequent surface as represented by the Last Return data. Intensity information is captured from the Reflective Surface pulse and indicates the relative energy returned to the sensor as compared to the energy transmitted. The Intensity image is not calibrated or normalized but indicates differences in energy absorption due to the interaction of the surface materials with laser energy at the wavelength transmitted by the sensor. |
Purpose: |
LIDAR data is used for 3D visualization, elevation based analysis and for feature extraction. |
Notes: |
10528 |
Supplemental Information: |
A final footprint for the 2008 Schoharie Bare Earth project area vist here: https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5043/supplemental/ny2008_fema_be_schoharie_m5043.kmz |
Keywords
Theme Keywords
Thesaurus | Keyword |
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ISO 19115 Topic Category |
elevation
|
Physical Location
Organization: | Office for Coastal Management |
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City: | Charleston |
State/Province: | SC |
Data Set Information
Data Set Scope Code: | Data Set |
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Maintenance Frequency: | Unknown |
Entity Attribute Overview: |
LAS 1.2 format (class 2 only) |
Entity Attribute Detail Citation: |
none |
Distribution Liability: |
Any conclusions drawn from the analysis of this information are not the responsibility of the Federal Emergency Management Agency (FEMA), Sanborn Map Company, Inc, Medina Consultants, the Office for Coastal Management or its partners. |
Data Set Credit: | Acknowledgement of the Federal Emergency Management Agency (FEMA), Sanborn Map Company, Inc, and Medina Consultants would be appreciated in products derived from these data. |
Support Roles
Data Steward
Date Effective From: | 2008-08 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Distributor
Date Effective From: | 2008-08 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Metadata Contact
Date Effective From: | 2008-08 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Point of Contact
Date Effective From: | 2008-08 |
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Date Effective To: | |
Contact (Organization): | NOAA Office for Coastal Management (NOAA/OCM) |
Address: |
2234 South Hobson Ave Charleston, SC 29405-2413 |
Email Address: | coastal.info@noaa.gov |
Phone: | (843) 740-1202 |
URL: | https://coast.noaa.gov |
Extents
Currentness Reference: | Ground Condition |
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Extent Group 1
Extent Group 1 / Geographic Area 1
W° Bound: | -74.73 | |
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E° Bound: | -74.306 | |
N° Bound: | 42.835 | |
S° Bound: | 42.56 |
Extent Group 1 / Time Frame 1
Time Frame Type: | Discrete |
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Start: | 2008-09-12 |
Spatial Information
Spatial Representation
Representations Used
Vector: | Yes |
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Access Information
Security Class: | Unclassified |
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Data Access Procedure: |
This data can be obtained on-line at the following URL: https://coast.noaa.gov/dataviewer The data set is dynamically generated based on user-specified parameters. ; |
Data Access Constraints: |
None |
Data Use Constraints: |
Users should be aware that temporal changes may have occurred since this data set was collected and some parts of this data may no longer represent actual surface conditions. Users should not use this data for critical applications without a full awareness of its limitations. |
Distribution Information
Distribution 1
Download URL: | https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=5043 |
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Distributor: | |
File Name: | Customized Download |
Description: |
Create custom data files by choosing data area, product type, map projection, file format, datum, etc. |
Distribution 2
Download URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5043/index.html |
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Distributor: | |
File Name: | Bulk Download |
Description: |
Simple download of data files. |
URLs
URL 1
URL: | https://coast.noaa.gov/dataviewer |
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URL Type: |
Online Resource
|
URL 2
URL: | https://coast.noaa.gov |
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URL Type: |
Online Resource
|
URL 3
URL: | https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/5043/supplemental/ny2008_fema_be_schoharie_m5043.kmz |
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Name: | Browse Graphic |
URL Type: |
Browse Graphic
|
File Resource Format: | kmz |
Description: |
Footprint representing the 2008 West Creek, Schoharie County bare earth lidar. |
Activity Log
Activity Log 1
Activity Date/Time: | 2016-06-14 |
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Description: |
Date that the source FGDC record was last modified. |
Activity Log 2
Activity Date/Time: | 2017-11-14 |
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Description: |
Converted from FGDC Content Standards for Digital Geospatial Metadata (version FGDC-STD-001-1998) using 'fgdc_to_inport_xml.pl' script. Contact Tyler Christensen (NOS) for details. |
Activity Log 3
Activity Date/Time: | 2018-02-08 |
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Description: |
Partial upload of Positional Accuracy fields only. |
Activity Log 4
Activity Date/Time: | 2018-03-13 |
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Description: |
Partial upload to move data access links to Distribution Info. |
Technical Environment
Description: |
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.4.1420 |
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Data Quality
Horizontal Positional Accuracy: |
Contracted to meet 1 meter (RMSE) horizontal accuracy. |
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Vertical Positional Accuracy: |
LiDAR data accuracy determination shall employ the National Standard for Spatial Data Accuracy (NSSDA). Contracted to meet 18.5cm (RMSE) on open bare terrain and 37.0cm for obscured areas. |
Completeness Report: |
LIDAR raster data is visually inspected for completeness to ensure that any gaps between flight lines or loss of signal represents less than 5% of required collection area. LIDAR is self-illuminating and has minimal cloud penetration capability. Water vapor in steam plumes or particulates in smoke may cause reflection of LIDAR signals and loss of elevation information beneath these plumes. Glass structures and roofs may appear transparent to the LIDAR signal and therefore may not register on the reflective surface. Some asphalt formulations have been shown to absorb topographic LIDAR wavelength energy resulting in "pitting" of roof surfaces using this material. |
Conceptual Consistency: |
All LAS formatted LIDAR data are validated using commercial GIS software to ensure proper formatting and loading before delivery. This validation procedure ensures that data on delivery media is in correct physical format and is readable. |
Lineage
Sources
LiDAR
Publish Date: | 2008-01-01 |
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Extent Type: | Discrete |
Extent Start Date/Time: | 2008 |
Source Contribution: |
Raw spatial elevation information | Type of Source Media: Hard drive |
Process Steps
Process Step 1
Description: |
Data Collection: Using an Leica Geosystems ALS50 Laser Systems, 89 flight lines with a nominal point spacing = 1.4 meters (4.59 feet) were collected over Erie County, NY (approximately 1044 square miles). Multiple returns were recorded for each laser pulse along with an intensity value for each return. The data acquisition occurred in missions on April 17, 2008 and April 28, 2008. During the LIDAR campaign, the field crew conducted a GPS field survey to establish final coordinates of the ground base stations for final processing of the base-remote GPS solutions. |
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Process Date/Time: | 2008-09-01 00:00:00 |
Process Step 2
Description: |
Airborne GPS Processing: Airborne GPS data was differentially processed and integrated with the post processed IMU data to derive a smoothed best estimate of trajectory (SBET). The SBET was used to reduce the LiDAR slant range measurements to a raw reflective surface for each flight line. The overlap between flight lines was removed to provide a homogeneous coverage, and the coverage was classified to extract a bare earth digital elevation model (DEM). Airborne GPS is differentially processed using the GrafNAV V7.50 software by Waypoint Consulting of Calgary, Alberta, Canada. IMU data is processed using the PosPac V4.2 software by Applanix Corporation of Richmond Hill, Ontario, Canada. The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta, Georgia. The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helsinki, Finland. |
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Process Date/Time: | 2008-09-01 00:00:00 |
Process Step 3
Description: |
LIDAR Ground Point Classification: The classification and quality control (QC) of LiDAR Ground point class is carried out using TerraScan software by Terrasolid Limited of Helsinki, Finland. In the filtering process points are classified as Ground or non-Ground classes (Unclassified). |
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Process Date/Time: | 2008-10-01 00:00:00 |
Process Step 4
Description: |
Output: LAS Files LIDAR points in 1.0 format; ASCII (e,n,z,i) for first return and last return; ESRI GRID for Bare Earth; GeoTiff (8-bit, single band) Intensity Images. |
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Process Date/Time: | 2008-10-01 00:00:00 |
Process Step 5
Description: |
The NOAA Office for Coastal Management (OCM) received the files in a shapefile as points with a z value associated as elevation, referenced to a Universal Transverse Mercator cooridinate system, zone 16 N in meters and referenced to the NAVD88 Geoid 03 vertical datum with vertical units of measure of meters. OCM performed the following processing to the data to make it available within the Digital Coast: 1. Converted from UTM coordinates to geographic coordinates in decimal degrees. 2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoid) heights using Geoid 03. 3. The data were filtered to remove outliers. 4. Provided metadata referenced a 5 and 10 m DEM product therefore metadata intricacies were derived from similar project metadata and an in-depth search for relevant 2008 project information. |
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Process Date/Time: | 2016-06-09 00:00:00 |
Catalog Details
Catalog Item ID: | 49884 |
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GUID: | gov.noaa.nmfs.inport:49884 |
Metadata Record Created By: | Anne Ball |
Metadata Record Created: | 2017-11-15 15:22+0000 |
Metadata Record Last Modified By: | SysAdmin InPortAdmin |
Metadata Record Last Modified: | 2022-08-09 17:11+0000 |
Metadata Record Published: | 2022-03-16 |
Owner Org: | OCMP |
Metadata Publication Status: | Published Externally |
Do Not Publish?: | N |
Metadata Last Review Date: | 2022-03-16 |
Metadata Review Frequency: | 1 Year |
Metadata Next Review Date: | 2023-03-16 |