Jaffe, Bruce E. , Gelfenbaum, Guy, Buckley, Mark L. , Watt, Steve, Apotsos, Alex, Stevens, Andrew W. , and Richmond, Bruce, February 2010, Am_Sam_tsu_inun_2009: Open-File report USGS OFR 2010-1018, U.S. Geological Survey, Coastal and Marine Geology Program, Western Coastal and Marine Geology, Santa Cruz, CA.Online Links:
This is a Vector data set. It contains the following vector data types (SDTS terminology):
Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.000000. Longitudes are given to the nearest 0.000000. Latitude and longitude values are specified in Decimal degrees.
The horizontal datum used is D_WGS_1984.
The ellipsoid used is WGS_1984.
The semi-major axis of the ellipsoid used is 6378137.000000.
The flattening of the ellipsoid used is 1/298.257224.
Sequential unique whole numbers that are automatically generated.
Coordinates defining the features.
Afao
Afono
Alega
Asili
Auma
Fagafue Bay
Fagaitua
Fagamalo
Fagatele Bay Area
Leone
Maloata Bay
Masefau
Massacre Bay
Poloa
Tula
Vailoatai
| Range of values | |
|---|---|
| Minimum: | 517601 |
| Maximum: | 547024 |
| Units: | meters |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 8412517 |
| Maximum: | 8424540 |
| Units: | meters |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | -170.83679 |
| Maximum: | -170.56408 |
| Units: | decimal degrees |
| Resolution: | 0.00001 |
| Range of values | |
|---|---|
| Minimum: | -14.35937 |
| Maximum: | -14.25037 |
| Units: | decimal degrees |
| Resolution: | 0.00001 |
| Range of values | |
|---|---|
| Minimum: | 0.07 |
| Maximum: | 24.93 |
| Units: | meters |
| Resolution: | 0.01 |
Fixed
Floating
| Range of values | |
|---|---|
| Minimum: | 2 |
| Maximum: | 26 |
| Units: | count |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 200 |
| Units: | meters |
| Resolution: | 1 |
| Range of values | |
|---|---|
| Minimum: | 0 |
| Maximum: | 20 |
| Units: | meters |
| Resolution: | 1 |
1 - physical
2 - interviews
3 - both
10-12-2009
10-12-2009 and 11-6-2009
10-14-2009
10-14-2009 and 11-6-2009
10-15-2009
10-17-2009
10-17-2009 and 11-7-2009 and 11-9-2009
10-19-2009
10-9-2009
11-11-2009
11-12-2009
11-6-2009
11-7-2009
11-9-2009 and 11-11-2009
The U.S. Geological Survey Coastal and Marine Geology Program funded this research. We would like to thank Brian Peck (U.S. Department of Agriculture, Natural Resources Conservation Service, American Samoa) for transporting us in his boat and helping map in the areas difficult to reach by land on the north coast of American Samoa. Marie Chan Kau_ and Sharon Fanolua (American Samoa Community College) were translators and ambassadors for the early surveys. John Goeke (American Samoa Department of Homeland Security), Lauren Wetzell (American Samoa Community College), Don Vargo (American Samoa Community College), and many others in the American Samoa scientific community also helped by providing logistical support. Brenda Jones and Stephen Hammond (U.S. Geological Survey) made satellite images available to those responding to the tsunami as soon as possible.
We would like to thank the people of American Samoa who welcomed tsunami response teams into their villages to collect this critical data.
831-427-4742 (voice)
831-427-4748 (FAX)
bjaffe@usgs.gov
These data are intended for science researchers, students, and the general public. The data can be used with geographic information systems (GIS) software to display geologic and oceanographic information.
, U.S. Geological Survey, Coastal and Marine Geology Program, 2009, USGS CMG L-6-09-SP Metadata..Online Links:
, U.S. Geological Survey, Coastal and Marine Geology Program, 2009, USGS CMG L-4-09-SP Metadata..Online Links:
Person who carried out this activity:
831-427-4742 (voice)
831-427-4748 (FAX)
bjaffe2usgs.gov
From Jaffe, B.E., Gelfenbaum, G., Buckley, M.L., Watt, S., Apotsos, A., Stevens, A.W.,
and Richmond, B.M., 2010, The Limit of Inundation of the September 29, 2009 Tsunami
on American Samoa: U.S. Geological Survey Open-File Report 2010-1018.
DGPS error report on accuracy of attribute H_95:
The processing programs a statistically-derived error estimate for each DGPS measurement.
The error estimate is associated with a confidence level which gives the probability that
the true value of the measurement falls within the range generated by subtracting and
adding the error estimate to the measured value. The 95% confidence level for the
horizontal location is reported in the accompanying files. For example, a measurement
for the location of the inundation limit of 50.5 meters from shore that has an error
estimate of 1.1 meters at the 95% confidence level has a 95% probability that the true
value is between 49.4 - 51.6 meters from shore (Magellan, 2008). The software
documentation does not provide information for the algorithms used to calculate this
estimate and it was therefore impossible to determine the quality of the estimate.
Identification uncertainty report on accuracy of attribute Interp_ERR:
A value of <2 m, <5 m, <10 m or <20 m was assigned to each data point as the uncertainty
in the interpretation of the location of the limit of inundation. Although an attempt
was made to standardize the estimates of how close the line we walked was to the actual
inundation line, such standardization was not possible because not all scientists were
present for each survey. The uncertainties reported in the files accompanying this
report, therefore, are intrinsically subjective. Guiding principles for assigning
horizontal uncertainty in the interpretation of the limit of inundation are that
uncertainties are lower for: (1) fresher evidence (earlier surveys), (2) steeper slopes,
(3) more debris-rich environments, and (4) where an eyewitness accompanied the survey team
to point out the limit of inundation. The uncertainty is also not always symmetric,
with locations where there was larger uncertainty landward of the reported location
because evidence was interpreted conservatively and inland terrain was difficult
to navigate in places (e.g., steep vegetated terrain). Often, but not always, the
uncertainty in interpreting the location of the limit of inundation was greater than
the DGPS error.
For information about omissions, selection criteria, generalization, definitions used, and other rules used to derive the data set, see Jaffe, B.E., Gelfenbaum, G., Buckley, M.L., Watt, S., Apotsos, A., Stevens, A.W., and Richmond, B.M., 2010, The Limit of Inundation of the September 29, 2009 Tsunami on American Samoa: U.S. Geological Survey Open-File Report 2010-1018.
For an explanation of the fidelity of relationships in the data set and tests used, see Jaffe, B.E., Gelfenbaum, G., Buckley, M.L., Watt, S., Apotsos, A., Stevens, A.W., and Richmond, B.M., 2010, The Limit of Inundation of the September 29, 2009 Tsunami on American Samoa: U.S. Geological Survey Open-File Report 2010-1018.
Are there legal restrictions on access or use of the data?
- Access_Constraints:
- If physical samples or materials are available, constraints on their on-site access are described in "WR CMG Sample Distribution Policy" at URL: <http://walrus.wr.usgs.gov/infobank/programs/html/main/sample-dist-policy.html>
- Use_Constraints:
- Not suitable for navigation.
Read and fully comprehend the metadata prior to data use.
Acknowledge the U.S. Geological Survey (USGS), the Originator, when using the data set as a source. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Share data products developed using the source data set with the Originator.
Data should not be used beyond the limits of the source scale. This information is not intended for navigational purposes.
The data set is NOT a survey document and should not be utilized as such. Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
831-427-4742 (voice)
831-427-4748 (FAX)
bjaffe@usgs.gov
Open-File Report 2010-1018
This information is not intended for navigational purposes. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ArcInfo format, this metadata file may include some ArcInfo-specific terminology. Please recognize the U.S. Geological Survey (USGS) as the source of this information. Physical materials are under controlled on-site access. Some USGS information accessed through this means may be preliminary in nature and presented without the approval of the Director of the USGS. This information is provided with the understanding that it is not guaranteed to be correct or complete and conclusions drawn from such information are the responsibility of the user.
| Data format: | ASCII Size: 0.419 |
|---|---|
| Network links: |
<http://pubs.er.usgs.gov/usgspubs/ofr/ofr20101018> |
831-427-4743 (voice)
831-427-4748 (FAX)
swatt@usgs.gov