extract_volcanoes − Extract subsets of data from Smithsonian volcano database
extract_volcanoes [ database] [ −Rwest/east/south/north ] [ −V ] [ −Zzlow/zhigh ] [ > outfile ]
extract_volcanoes reads the Smithsonian catalog of Holocene to Recent volcanoes and extracts a subset based on the given command line options. The output format is of the form (lon, lat, elevation, name) which may be plotted with psxy.
databasee
The Smithsonian database [by default we read $GMT_DATADIR/volcanos_of_the_world.txt]. −H Output a 1-record header [no header].
−R |
Limit search to a geographical region. [Default is global search] |
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−V |
Report progress and final statistics to stderr [Default is silent]. |
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−Z |
Extract volcanoes with elevations in the specified range [Default uses all elevations]. |
To extract all volcanoes from south America, limited to sites at elevations greater than1 km, try
extract_volcanoes −R-85/-30/-60/10 −Z1000/10000 −V > volc.d