gov.noaa.nmfs.inport:50033
eng
UTF8
dataset
OCM Partners
resourceProvider
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
2006 Texas Water Development Board (TWDB) Lidar: Aransas and Refugio Counties
tx2006_aransas_refugio_m96_metadata
2007-08
publication
NOAA/NMFS/EDM
50033
https://www.fisheries.noaa.gov/inport/item/50033
WWW:LINK-1.0-http--link
Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
information
https://coast.noaa.gov
WWW:LINK-1.0-http--link
Citation URL
Online Resource
download
https://coast.noaa.gov/dataviewer
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Citation URL
Online Resource
download
Using a LH Systems ALS50 Light Detection And Ranging (LiDAR) system, flight lines of standard density (1.4 meter ground
sample distance) data were collected over areas in Aransas and Refugio Counties, TX (approximately 282 square miles). Multiple
returns were recorded for each laser pulse along with an intensity value for each return. The data acquisition occurred in missions
in 2006. The data was collected by Sanborn Mapping Company, Inc. for the Texas Water Development Board (TWDB)and the Federal
Emergency Management Agency (FEMA).
Original contact information:
Contact Name: Ryan Mitchell
Contact Org: Texas Natural Resources Information System (TNRIS)
Phone: 512-463-8337
Email: lidar@tnris.state.tx.us
This LIDAR operation was designed to provide a high density set of masspoints within the defined areas. The data
sets are suitable for the development of contours for use in hydraulic/hydrologic model development, and for assessing
environmental impacts. Typical uses for the data set include: FEMA Flood Plain Map Modernization, DFIRM map updates,
watersheds and other hydro studies per FEMA specifications, county mapping projects, and flood mitigation assessment.
Data collected by Sanborn Mapping Company, Inc. for the Texas Water Development Board (TWDB) and the Federal
Emergency Management Agency (FEMA). Acknowledgement of TNRIS (Texas Natural Resources Information System) would be appreciated
in products derived and used from this data. Sanborn Mapping Company asks to be credited in derived products.
completed
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
pointOfContact
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
custodian
notPlanned
Drainage Area
Hydraulic
Hydrographic
Hydrology
TNRIS (Texas Natural Resources Information System)
theme
Lidar - partner (no harvest)
project
InPort
otherRestrictions
Cite As: OCM Partners, [Date of Access]: 2006 Texas Water Development Board (TWDB) Lidar: Aransas and Refugio Counties [Data Date Range], https://www.fisheries.noaa.gov/inport/item/50033.
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
otherRestrictions
Access Constraints: None
otherRestrictions
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.
otherRestrictions
Distribution Liability: Any conclusions drawn from the analysis of this information are not the responsibility of the Office for Coastal Management or its partners.
unclassified
NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
50033
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nos/ocmp/dmp/pdf/50033.pdf
WWW:LINK-1.0-http--link
NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
vector
eng; US
elevation
Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.2.2.1350
-97.538724
-96.788924
27.812486
28.562486
| Currentness: Publication Date
2006-06-01
2006-06-15
The Aransas and Refugio Counties data set was received from the Texas Water Development Board (TWDB). It was reviewed by the
NOAA Office for Coastal Management at the macro level, which included checking for format and point characteristics for approximately
5% of the tiles. In addition, the entire data set was reviewed to establish that bare earth processing and proper classification
of the points had been performed. It did not include accuracy or data processing (e.g. bare earth quality, flightline
mismatch, feature removal) assessments. Based on the limited review, the data set on average appeared to be of fair quality.
Again, no accuracy assessment was performed. The results of this review are detailed below. The results may also be viewed as
a formatted document. This document is entitled "Lidar Fact Sheet: Aransas and Refugio Counties," and may be viewed at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/96/supplemental/aransas_refugio_fact-sheet.pdf
One aspect of the review included a bare earth point density review. A graphic was created for this pdf 6 that displays the bare earth
point density per 2500 sq meter cell and per sq meter. The issues determined in this part of the review were:
1. The areas offshore that have water points classified as bare earth. This can be seen in the amount of salmon colored
cells that occur offshore.
2. Also of note are the dark green cells that follow particular flightlines in the eastern part of the data set.
It appears that the points in these flightlines may have been classified differently than points in the rest of the data set.
This may be a result of data processing differences.
3. Red areas (low bare earth point density) correspond to vegetated/forested areas, as would be expected.
A footprint of this data set may be viewed in Google Earth at:
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/96/supplemental/2006_TWDB_Lidar_Aransas_and_Refugio_Counties.kmz
NOAA Office for Coastal Management
(843) 740-1202
2234 South Hobson Ave
Charleston
SC
29405-2413
coastal.info@noaa.gov
https://coast.noaa.gov
WWW:LINK-1.0-http--link
NOAA Office for Coastal Management Website
NOAA Office for Coastal Management Home Page
information
distributor
https://coast.noaa.gov/dataviewer/#/lidar/search/where:ID=96
WWW:LINK-1.0-http--link
Customized Download
Create custom data files by choosing data area, product type, map projection, file format, datum, etc.
download
https://noaa-nos-coastal-lidar-pds.s3.amazonaws.com/laz/geoid18/96/index.html
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Bulk Download
Simple download of data files.
download
dataset
Horizontal Positional Accuracy
FEMA LiDAR Specifications
Vertical Positional Accuracy
FEMA LiDAR Specifications; +/- 18 cm in open terrain
Completeness Report
None
Conceptual Consistency
None
Data Collection:
Using a LH Systems ALS50 Light Detection And Ranging (LiDAR) system, flight lines of standard density (1.4 meter ground
sample distance) data were collected over areas in Aransas and Refugio Counties, TX (approximately 282 square miles). Multiple
returns were recorded for each laser pulse along with an intensity value for each return. The data acquisition occurred in
missions between June 1, 2006 and June 15, 2006. During the LIDAR campaign, the Sanborn 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.
2007-08-01T00:00:00
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.
The PDOP and distance separation is as follows:
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.
2007-08-01T00:00:00
IMU data Processing:
IMU data provides information concerning roll, pitch and yaw of collection platform during collection event. IMU information
allows the pulse vector to be properly placed in 3D space allowing the distance from the aircraft reference point to be properly
positioned on the elevation model surface. IMU data is processed using the PosPac V4.2 software by Applanix Corporation of
Richmond Hill, Ontario, Canada.
2007-08-01T00:00:00
Reflective Surface Generation:
The reflective surface is derived using the ALS Post Processor software by Leica Geosystems GIS & Mapping Division of Atlanta,
Georgia.
2007-08-01T00:00:00
LIDAR Point Classification
The classification and quality control (QC) of LiDAR data is carried out using TerraScan software by Terrasolid Limited of
Helsinki, Finland.
2007-08-01T00:00:00
Output LAS Files
The product output of LiDAR data is carried out using TerraScan software by Terrasolid Limited of Helsinki, Finland. LAS Binary,
ascii xyz, and intensity images were created.
2007-08-01T00:00:00
The NOAA Office for Coastal Management (OCM) received the files in las format. The files contained Lidar
elevation and intensity measurements. The data was in UTM projection, and NAVD88 Geoid 03 vertical datum. OCM performed
the following processing to the data to make it available within the Digital Coast Data Access Viewer (DAV):
1. The data were converted from UTM coordinates to geographic coordinates.
2. The data were converted from NAVD88 (orthometric) heights to GRS80 (ellipsoid) heights using Geoid 03.
3. The LAS data were sorted by latitude and the headers were updated.
2008-08-13T00:00:00