User`s guide

15-5
tsunamis.dbf
tsunamis.shp
tsunamis.shx
tsunamis.txt
tsunamis.txt is not part of the shapefile set. It is a text file documenting the data set.
The data includes tidal wave events for which the maximum water height was at least
one meter, ranging for the years 1950 to 2006, inclusive. The Global Tsunami Database,
U.S. National Geospatial Data Center (NGDC), National Oceanic and Atmospheric
Administration (NOAA), available at http://www.ngdc.noaa.gov/seg/hazard/tsu.shtml, is
the source of the data. All the files consist of U.S. Government information that is in the
public domain and is not subject to copyright protection.
The approximate location of each event is a single point in geodetic coordinates (latitude-
longitude) with an unspecified datum. The .dbf file contains 18 separate text or numeric
attributes for most events, including wave height, causes and seismic magnitudes, and
location and country names.
The shapefiles were created at MathWorks from querying the online source data,
importing the results into the MATLAB workspace, and exporting them using the
Mapping Toolbox shapewrite function. For more information, type
edit tsunamis.txt
at the MATLAB prompt.
Better Trimming Benefits fillm Function
The changes described in the Versin 2.6 (R2007b) release note “Improvements to Data
Trimming in patchm and patchesm” on page 16-6 resulting from improved polygon
trimming also apply to the fillm function.
Restored units Options for Function angl2str
The angl2str function once again can format strings for angles in degrees-minutes (DM)
and degrees-minutes-second (DMS) notations. These options were removed in Version 2.6
(R2007b), and have now been restored. In addition to the 'degrees' and 'radians'
units options, you can now obtain DM- and DMS-formatted strings by specifying
• 'degrees2dm' — for degrees-decimal minutes formatting
• 'degrees2dms' — for degrees-minutes-decimal seconds formatting