viking - Online in the Cloud

PROGRAM:

NAME

viking - program to manage GPS data

SYNOPSIS

viking [-d | --debug] [-V | --verbose]
[--latitude degrees] [--longitude degrees]
[-z | --zoom ZoomLevelOSM] [-m | --map MapId]
[file...]

viking [-h | --help]

viking [-v | --version]

DESCRIPTION

Viking is a program to manage GPS data.

You can import and plot tracks, routes and waypoints, show OpenStreetMap (OSM) and/or
other maps, generate maps (using Mapnik), geotag images, add coordinate lines, make new
tracks, routes and waypoints, hide different things, etc. It is written mainly in C with
some C++ and uses the GTK+ 2 toolkit. It is available for Linux, other POSIX operating
systems and Windows.

Homepage: http://viking.sf.net

Viking is licensed under the GNU GPL.

OPTIONS

file
Specify file to load at start.

-d, --debug
Enable debug output.

-V, --verbose
Enable verbose output.

-?, --help
Show help options.

-v, --version
Show version.

--latitude
Set the initial position to the specified latitude in decimal degrees.

--longitude
Set the initial position to the specified longitude in decimal degrees.

-z, --zoom
Set the initial zoom level. The value is the OSM zoom level (0 - 22).

-m, --map
Add a map layer by specifying the map id. The value needs to match one of the internal
ids or an id from the maps configuration extension (see below). Specifying a value of
0 will use the configured map layer default.

Internal Map Ids:

OSM Mapnik = 13

OSM Cycle = 17

Mapquest OSM = 19

EXTENDING VIKING

Currently, viking has some extension points based on configuration files. The file format
is heavily inspired by the GtkBuilder file format: you specify the class of the GObject to
build and set its properties. Technically, it is a XML file containing a "objects" root
element. Inside this element, you set a collection of "object".

Here is an example:

<objects>
<object class="ClassName">
<property name="property_name1">Property value</property>
<property name="property_name2">Property value</property>
</object>
...
<objects>

You can find more examples in the documentation part of the distribution.

Map Source. It is possible to add new map's sources. The file is ~/.viking/maps.xml. An
example of the file in the distribution doc/examples/maps.xml. The VikSlippyMapSource
allows to declare any map's source working like OpenStreetMap. It supports the following
properties:

id
this is an integer and should be unique as it used to identify the map source

name
a string (should be unique) that is used for the OSM style cache directory name when
the Map Cache directory is the default (~/.viking-maps)

label
the text displayed in the map's source selection dialog

hostname
the server's hostname (eg. "tile.openstreetmap.org")

url
the parametrized address of the tile, in the spirit of C printf format, with 3 "%d"
fields for Z, X and Y (in that order) (eg. "/%d/%d/%d.png")

zoom-min (optional)
The minimum zoom value supported by the tile server. The Default is 0 if not
specified.

zoom-max (optional)
The maximum zoom value supported by the tile server. The Default is 18 if not
specified.

See Zoom Levels[1]

lat-min (optional)
The minimum latitude value in degrees supported by the tile server. The Default is -90
degrees if not specified.

lat-max (optional)
The maximum latitude value in degrees supported by the tile server. The Default is 90
degrees if not specified.

lon-min (optional)
The minimum longitude value in degrees supported by the tile server. The Default is
-180 degrees if not specified.

lon-max (optional)
The maximum longitude value in degrees supported by the tile server. The Default is
180 degrees if not specified.

file-extension (optional)
The file extension of the files on disk. The default is .png

If the tile source URL ends in something other than .png, then this parameter will
need to match it.

This can also be useful in reading a tileset from other software which may name tiles
in an alternative form, e.g. for Mobile Atlas creator it names them .png.tile

Note
The file types actually usable are those supported by GDK Pixbuf Library, which
includes at least PNG and JPEG.

Note
Remember to include the beginning '.' when specifying this parameter.

switch-xy (optional)
Swap the X,Y values around in the URL parametrized ordering.

The default is false.

check-file-server-time (optional)
Sends the timestamp of the tile to the server, so the server can decide whether it
should send a new tile or not.

The default is false.

use-etag (optional)
Use and compare the ETag[2] value in determining whether to download a newer tile. The
default is false.

The ETag value is stored in a separate file in the same directory as the tile to
enable checking the value across multiple runs of the program.
The VikTmsMapSource allows to declare any TMS service. It supports the following
properties (as per VikSlippyMapSource above):

id

label

hostname

url

check-file-server-time (optional)

zoom-min (optional)

zoom-max (optional)

lat-min (optional)

lat-max (optional)

lon-min (optional)

lon-max (optional)
The VikWmscMapSource allows to declare any WMS or WMS-C service. It supports the following
properties (as per VikSlippyMapSource above):

id

label

hostname

url

check-file-server-time (optional)

zoom-min (optional)

zoom-max (optional)

lat-min (optional)

lat-max (optional)

lon-min (optional)

lon-max (optional)

Go-to search engines. It is possible to add new new search engines for the "Go-To"
feature. The file is ~/.viking/goto_tools.xml. An example of the file in the distribution
doc/examples/goto_tools.xml. Currently, there is a single object class available:
VikGotoXmlTool. Such feature allows to declare any search engine using a XML format as
result. The related properties are:

label
the text displayed in the Go-To dialog

url-format
the parametrized address of the query, in the spirit of C printf format, with a single
"%s" field (replaced by the query string)

lat-path
XML path of the latitude (eg. /root/parent/elem)

lat-attr (optional)
name of the attribute (of previous element) containing the latitude

lon-path
XML path of the longitude (eg. /root/parent/elem)

lon-attr (optional)
name of the attribute (of previous element) containing the longiude
As a facility (or readability) it is possible to set both path and attribute name in a
single property, like an XPath expression. To do so, simply set both info in lat-path (or
lon-path) in the following format: /root/parent/elem@attribute.

External tools. It is possible to add new external tools. The file is
~/.viking/external_tools.xml. An example of the file in the distribution
doc/examples/external_tools.xml. The VikWebtoolCenter allows to declare any Webtool using
a logic based on center coordinates and zoom level value. The related properties are:

label
the text displayed in the menu entry

url
the parametrized URL to open, in the spirit of C printf format, with 2 "%s" and a "%d"
fields for X, Y and Z (zoom level) (eg. "http://hostname/?lat=%s&lon=%s&zoom=%d")
The VikWebtoolBounds allows to declare any Webtool using a logic based on bounds
coordinates. The related properties are:

label
the text displayed in the menu entry

url
the parametrized address of the tile, in the spirit of C printf format, with 4 "%s"
fields for left, right, bottom and top (eg.
"http://hostname:8111/load_and_zoom?left=%s&right=%s&bottom=%s&top=%s")

Remote File Datasources. It is possible to add web references expected to return a file
which can then be opened directly or converted via GPSBabel. The file is
~/.viking/datasources.xml. An example of the file is in the source distribution
doc/examples/datasources.xml. The VikWebtoolDatasource allows to declare any URL using
logic based on coordinates. The related properties are:

label
the text displayed in the menu entry

url
the parametrized URL to open in the spirit of C printf format, with up to 7 "%s"
values. e.g. http://hostname/getfile?lat=%s&lon=%s

The order and meaning of these parameters is given by the url_format_code below

url_format_code
A string describing the parametrized URL substitution parameters, each character
represents how to translate each term.

B = Bottom of the current view i.e. minimum latitude

L = Left of the current view i.e. minimum longitude

T = Top of the current view i.e. maximum latitude

R = Right of the current view i.e. maximum longitude

A = center lAtitude of the current view

O = center lOngitude of the current view

Z = OSM Zoom value of the current view. See Zoom Levels[1]

S = A user specified input string requested from the user via a dialog box

Thus for the url example above then the format code should be AO

file_type
This value is passed on for the -i parameter in interfacing with GPSBabel.

If it is not defined then the returned file is interpreted internally as a GPX file.

Possible values such as 'kml', 'mapsource' etc.. can be used. See GPSBabel File
Formats[3] for the full list.

babel_filter_args
This value is passed on for the filter arguments interfacing with GPSBabel.

E.g. "-x nuketypes,routes" can be used to filter all routes from the results.

input_label
This value is used when requesting input from the user.

It is the label of the text input box.

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