DOI: 10.21227/smmv-fk44
title: CRAWDAD tools/analyze/location/locana

description: Locana - a visualization tool for 802.11-based positioning systems.Locana is a research tool for 802.11-based positioning systems. Locana visualizes the results computed by Loctrace and Loceva.File :locana-0.5.1.src.tar.gz, locana-0.5.1.tar.gzUsage :After downloading and unpacking the jar archive the RadioMap tool can be run with the following command:java -Xmx512M -cp batik-awt-util.jar:batik-bridge.jar:batik-css.jar:batik-dom.jar:batik-extension.jar:batik-ext.jar:batik-gui-util.jar:batik-gvt.jar:batik-parser.jar:batik-script.jar:batik-svg-dom.jar:batik-svggen.jar:batik-swing.jar:batik-transcoder.jar:batik-util.jar:batik-xml.jar:locana-0.5.1.jar:locutil1-0.5.1.jar:locutil2-0.5.2.jar:xerces_2_5_0.jar:xml-apis.jar org.pi4.locana.radiomap.RadioMap [-offline FILENAME] [-online FILENAME] [-maxgrid DOUBLE]FILENAME can be a loctrace file (.trace) or a loceva file (.ptrace) to switch between loctrace and loceva mode, respectively. One of the parameters -offline and -online is required, both are valid. The -maxgrid parameter can be used optionally to set the maximum grid spacing. The default value is 5.0.Lastmodified :2007-12-05Dataname :tools/analyze/location/locanaChange :the initial version.Releasedate :2007-09-14References :king-tools
                The Locana websiteWebsite :http://www.informatik.uni-mannheim.de/pi4.data/content/projects/loclib/locana.htmlKeyword :802.11
                GPS
                locationLicense :This tool is released under the GNU General Public License.
Please respect our work and abide the license.Output :See "usage" for details.Parameters :See "usage" for details.Algorithm :1. Overview

Locana visualizes the results computed by Loctrace and Loceva. This helps 
verifying that the data traced by Loctrace is complete and sound. Intermediate 
results of Loceva can also be visualized. This is a great means to verify 
that these algorithms are working as they are supposed to do.

A whole bunch of tools are grouped together in the Locana package. 
Locana contains many small tools that are supposed to perform special jobs. 
Most of these tools verify the output of Loctrace and Loceva, or list a certain 
object of a trace file. For instance, a tool called AccessPointLister prints out 
all the access points and how often they have been heard for a given trace file.

2. RadioMap

However, Locana contains also a powerful tool named RadioMap. RadioMap offers 
two modes of operation: loctrace and loceva. The former mode visualizes trace files 
generated by Loctrace. This feature is mainly used to visually investigate a fingerprint 
database. For each reference point and access point the number of readings, 
the average signal strength and its standard deviation can be displayed. 
The same can be displayed for online points as well. Furthermore, the grid dimension 
and starting point of the grid of reference points can be varied.

As previously mentioned, Loceva is able to optionally generate a file that logs 
intermediate results of positioning algorithms. Such a log file can be displayed 
in loceva mode of RadioMap. This helps to better understand how the selected positioning 
algorithm works, and to verify that the implementation works as it is supposed to.