Free lookup zone software for linux

Geo::Lookup::ByTime is a Perl module to lookup location by time.

SYNOPSIS

use Geo::Lookup::ByTime;

$lookup = Geo::Lookup::ByTime->new( @points );
my $pt = $lookup->nearest( $tm );

Given a set of timestamped locations guess the location at a particular time. This is a useful operation for, e.g., adding location information to pictures based on their timestamp and a GPS trace that covers the same time period.

INTERFACE

new( [ points ] )

Create a new object optionally supplying a list of points. The points may be supplied as an array or as a reference to an array. Each point may be a reference to a hash containing at least the keys lat, lon and time or a reference to an object that supports accessor methods called latitude, longitude and time.

If a coderef is supplied it is assumed to be an iterator that may be called repeatedly to yield a set of points.

add_points( [ points ] )

Add points. The specification for what constitutes a point is the same as for new.

nearest( $time [ , $max_dist ] )

Return a hash indicating the estimated position at the specified time. The returned hash has lat, lon and time keys like this:

my $best = {
lat => 54.29344,
lon => -2.02393,
time => $time
};

Returns undef if the position cant be computed. By default a position will be calculated for any point that lies within the range of time covered by the reference points. Optionally $max_dist may be specified in which case undef will be returned if the closest real point is more than that many metres away from the computed point.
If the requested time coincides exactly with the timestamp of one of the points the returned point will be at the same location as the matching point. If the time falls between the timestamps of two points the returned point will be linearly interpolated from those two points.

In an array context returns a list containing the synthetic point at the specified time (i.e. the value that would be returned in scalar context), the closest real point and the distance between the two in metres

my ($best, $nearest, $dist) = $lookup->nearest( $tm );

get_points()

Return a reference to an array containing all the points in ascending time order.

time_range()

Return as a two element list the time range from earliest to latest of the points in the index. Returns undef if the index is empty.

hav_distance($pt, ...)

Exportable function. Computes the Haversine distance in metres along the line described by the points passed in. Points must be references to hashes with keys lat and lon.

Zonestats create an RRD database with the values of CPU and memory (RSS) usage per Solaris 10 zone. Zonestats project requires only the RRDs Perl module.

ZoneMaker is a script for making BIND zone files. ZoneMaker uses files similar to ini files to simplify updating several zone files simultaneously.
The script is fully capable of producing both normal and reverse zones as well as being able to produce HINFO, TXT and LOC records.
Currently there is no IPv6 support, although it is planned for a future release. Some knowledge about how zone files work is required to use this script effectively.
Main features:
- Supports both normal and reverse zones
- Supports a special global zone for using BIND9 views
- Supports a wide range of Record types
Installation:
After untarring the archive, youll want to first edit config.py. This file defines where the other files will be located. If you plan on running the script out of the tarball directory you should only need to modify OutputLocation.
Otherwise, change the options to suit.
The next step is to modify zones.conf and hosts.conf to suit your own needs a full list of options for each file can be found below
The format for hosts.conf and zones.conf is as follows
[section]
option1: value
option2: value
option3: value
In the above example, section would be the zone or host name. Options are not case sensitive, their values, however, are.

DNS::Zone contains a collection of Perl modules which provide an abstraction of name service zones as well as server specific adaptors for concrete file representations.

The modules origin is the ZoneMaster project which make heavy use of the module for comprehensive zone file management. Go to http://www.zonemaster.org for further information.

Installation:

You install DNS::Zone as you would install any perl module library, by running these command:

If you have CPAN.pm installed and are connected to the Internet

perl -MCPAN -e shell
> install DNS::Zone

or even

perl -MCPAN -e install DNS::Zone

otherwise

perl Makefile.PL
make
make test
make install

hsclock is a small, accurate, multi-zone GTK clock that can also run in a tty.

Currently configuration is solely by commandline options. hsclock uses GTK timeouts to synchronize with the system clock, making display updates accurate to within milliseconds.

The time output format can be set with a date-like format option.

Time::Zone is a miscellaneous timezone manipulations routines.

SYNOPSIS

use Time::Zone;
print tz2zone();
print tz2zone($ENV{TZ});
print tz2zone($ENV{TZ}, time());
print tz2zone($ENV{TZ}, undef, $isdst);
$offset = tz_local_offset();
$offset = tz_offset($TZ);

This is a collection of miscellaneous timezone manipulation routines.
tz2zone() parses the TZ environment variable and returns a timezone string suitable for inclusion in date-like output. It opionally takes a timezone string, a time, and a is-dst flag.

tz_local_offset() determins the offset from GMT time in seconds. It only does the calculation once.

tz_offset() determines the offset from GMT in seconds of a specified timezone.
tz_name() determines the name of the timezone based on its offset