ISO Table View
Alternate Views:
Get Data,
FAQ,
ISO Rubric,
CSW,
HTML,
Components, XML
Metadata Identifier: gov.noaa.csc.maps:2006_TX_Aransas_Refugio_m96
MD_DataIdentification
| 1 |
|
2006 Texas Water Development Board (TWDB) Lidar: Aransas and Refugio Counties
|
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).
|
SV_Identification
| 1 |
|
2006 Texas Water Development Board (TWDB) Lidar: Aransas and Refugio Counties |
|
|
| 1 |
|
Lidar Survey Fact Sheet |
|
|
| 2 |
|
None |
|
|
| 1 |
|
North American Datum 1983 |
|
|
| 1 |
|
|
|
|
|
resourceProvider |
http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269 |
| 1 |
|
|
|
Citation URL |
|
|
ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/tx/aransas_refugio/aransas_refugio_fact-sheet.pdf |
| 1 |
NOAA CSC (originator) |
|
DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
|
|
csc.info@noaa.gov |
originator |
|
| 1 |
NOAA CSC (publisher) |
|
DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
|
|
csc.info@noaa.gov |
publisher |
|
| 1 |
NOAA CSC(distributor) |
|
DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
|
|
csc.info@noaa.gov |
distributor |
|
| 1 |
NOAA CSC (processor) |
|
DOC/NOAA/NOS/CSC > Coastal Services Center, National Ocean Service, National Oceanic
and Atmospheric Administration, U.S. Department of Commerce
|
|
csc.info@noaa.gov |
processor |
|
| 1 |
EPSG Registry |
|
European Petroleum Survey Group |
|
|
publisher |
http://www.epsg-registry.org/ |
| 6 |
|
Jamie Young |
Sanborn Mapping |
LiDAR Manager |
jyoung@sanborn.com |
processor |
|
| 1 |
Mike Sutherland(author) |
Mike Sutherland |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
|
|
mike.sutherland@noaa.gov |
author |
|
| 1 |
Mike Sutherland |
Mike Sutherland |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
|
|
mike.sutherland@noaa.gov |
distributor |
|
| 1 |
|
Pamela Grothe |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
|
|
|
processor |
|
| 1 |
|
Ryan Mitchell |
Texas Natural Resources Information System (TNRIS) |
|
lidar@tnris.state.tx.us |
pointOfContact |
|
| 1 |
|
|
Texas Water Development Board (TWDB) |
|
|
originator |
|
| 1 |
|
ftp://ftp.csc.noaa.gov/pub/crs/beachmap/qa_docs/tx/aransas_refugio/aransas_refugio_fact-sheet.pdf |
Lidar Survey Fact Sheet |
|
information |
| 1 |
|
http://www.epsg-registry.org/ |
European Petroleum Survey Group Geodetic Parameter Registry |
Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured
dataset of Coordinate Reference Systems and Coordinate Transformations.
|
search |
| 1 |
|
http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4269 |
NAD83 |
Link to Geographic Markup Language (GML) description of reference system. |
information |
| 1 |
|
Ellipsoid in Meters |
| 1 |
|
urn:ogc:def:crs:EPSG::4269 |
|
Bounding Box |
Temporal Extent |
| 1 |
|
|
-97.538724 |
-96.788924 |
28.562486 |
27.812486 |
2006-06-01 |
2006-06-15 |
| 1 |
|
-97.538724 |
-96.788924 |
28.562486 |
27.812486 |
| 1 |
Lidar Use Limitation |
These data depict the elevations at the time of the survey and are only
accurate for that time. 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. Any conclusions
drawn from analysis of this information are not the responsibility of NOAA
or any of its partners. These data are NOT to be used for navigational purposes.
|
| 1 |
Ellipsoid |
Ellipsoid in Meters |
|
| 1 |
NAD83 |
urn:ogc:def:crs:EPSG::4269 |
North American Datum 1983 |
| 1 |
|
Lidar Survey Fact Sheet |
|
crossReference |
| 1 |
|
2006-01-03T00:00:00 |
The NOAA National Geophysical Data Center (NGDC) received lidar data
files via ftp transfer from the NOAA Coastal Services Center. The data are
currently being served via NOAA CSC Digital Coast at http://www.csc.noaa.gov/digitalcoast/.
The data can be used to re-populate the system. The data are archived in LAS
or LAZ format. The LAS format is an industry standard for LiDAR data developed by
the American Society of Photogrammetry and Remote Sensing (ASPRS); LAZ is a loseless
compressed version of LAS developed by Martin Isenburg (http://www.laszip.org/). The
data are exclusively in geographic coordinates (either NAD83 or ITRF94). The data
are referenced vertically to the ellipsoid (either GRS80 or ITRF94), allowing for
the ability to apply the most up to date geoid model when transforming to orthometric
heights.
|
| 1 |
|
2007-08-01T00:00:00 |
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
XXXX, 2006 and XXXX, 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.
|
| 1 |
|
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.
|
| 1 |
|
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.
|
| 1 |
|
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.
|
| 1 |
|
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.
|
| 1 |
|
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.
|
| 1 |
|
2008-08-13T00:00:00 |
The NOAA Coastal Services Center (CSC) 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. CSC performed the following processing
to the data to make it available within the LDART Retrieval Tool (LDART): 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.
|
|
