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use  Geo::WebService::Elevation::USGS;
use Data::Dumper;
...
# scilla sicily
$x = $eq->elevation(38.17378844699463, 15.83642789839883);
print Dumper($x);

$VAR1 = {
          'Units' => 'Feet',
...
          'Units' => 'Feet',
          'Data_Source' => '3DEP 1/3 arc-second'
        };