# Attributions

This document contains licenses and notices for open source software used in this product. The source code used in this product is available on the project website http://viking.sf.net

## coords.c + coords.h

Available under license:

    ** Copyright © 2001 by Jef Poskanzer jef@acme.com.
    ** All rights reserved.
    **
    ** Redistribution and use in source and binary forms, with or without
    ** modification, are permitted provided that the following conditions
    ** are met:
    ** 1. Redistributions of source code must retain the above copyright
    **    notice, this list of conditions and the following disclaimer.
    ** 2. Redistributions in binary form must reproduce the above copyright
    **    notice, this list of conditions and the following disclaimer in the
    **    documentation and/or other materials provided with the distribution.
    **
    ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
    ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ** ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
    ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    ** OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    ** HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    ** SUCH DAMAGE.

## strtod.c

Source:

Available under license:

    // Copyright (C) 2002 Michael Ringgaard. All rights reserved.
    //
    // Redistribution and use in source and binary forms, with or without
    // modification, are permitted provided that the following conditions
    // are met:
    //
    // 1. Redistributions of source code must retain the above copyright
    //    notice, this list of conditions and the following disclaimer.
    // 2. Redistributions in binary form must reproduce the above copyright
    //    notice, this list of conditions and the following disclaimer in the
    //    documentation and/or other materials provided with the distribution.
    // 3. Neither the name of the project nor the names of its contributors
    //    may be used to endorse or promote products derived from this software
    //    without specific prior written permission.
    //
    // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
    // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    // ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
    // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    // OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    // OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    // SUCH DAMAGE.

## kdtree.c + kdtree.h - 0.5.6

Source:

Available under license:

    Copyright (C) 2007-2011 John Tsiombikas  nuclear@member.fsf.org

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this
       list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice,
       this list of conditions and the following disclaimer in the documentation
       and/or other materials provided with the distribution.
    3. The name of the author may not be used to endorse or promote products
       derived from this software without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
    WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
    MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
    EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
    OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
    IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
    OF SUCH DAMAGE.

## Data: cities15000.txt

Source:

This is used in a lookup of positions to timezones.

Unneccesary fields in the dataset (for Viking) have been removed and the resultant file is `data/latlontz.txt`

Available under license:

    This work is licensed under a Creative Commons Attribution 3.0 License,
    see
    The Data is provided "as is" without warranty or any representation of accuracy, timeliness or completeness.

## Data: Response to online request made in vikgoto.c

Use of geoPlugin services making use of geolocation data is under condition of acceptance of the Creative Commons Attribution-ShareAlike 3.0 Unported License.

This product includes GeoLite data created by MaxMind, available from .