Post on 05-Dec-2014
description
VISUALIZATIONS WITHSPARQL ANDVISUALBOX
Alvaro Graves
gravea@rpi.edu
@alvarograves
MOTIVATIONLinked Data brings tons of multidimensional data thatis easy(*) to query
However, having to make use of all that data we stillneed to being able to process it (as humans)
One good way to make sense of this data is by usingvisualizations
(*) Once you learn SPARQL
EXAMPLE
versus
Images: Few, Stephen (2010): Data Visualization for Human Perception. In: Soegaard, Mads and Dam, Rikke Friis (eds.). "Encyclopedia of Human-Computer Interaction". Aarhus, Denmark:The Interaction Design Foundation. Available online at http://www.interaction-design.org/encyclopedia/data_visualization_for_human_perception.html
VISUALBOXBased on
Make use of new and already existing visualizationfilters
Creating of visualization via new GUI
Principle: Good data representation leads to good/easydata manipulation
Corolary: Effort should be focused on obtaining theright data
LODSPeaKr
VISUALBOX
MODELS (SPARQL QUERY)Using the SELECT query form will return a table, similar
to SQL.
person1person1 person2person2http://example.org/john http://example.org/paulhttp://example.org/john http://example.org/ringohttp://example.org/george http://example.org/paul
main.query
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
SELECT ?person1 ?person2 WHERE{ ?person1 foaf:knows ?person2 . }
VIEWS (TEMPLATES)We can decide how to operate with the data.
html.template
<ul>{{for row in models.main}} <li>{{row.person1.value}} knows {{row.person2.value}}</li>{{endfor}}</ul>
output
http://example.org/john knows http://example.org/paul
http://example.org/john knows http://example.org/ringo
http://example.org/george knows http://example.org/paul
FILTERSIt is possible to apply filters to the data.
Template
{{for row in models.main}} {{row.person1.value|upper}}{{endfor}}
Output
HTTP://EXAMPLE.ORG/JOHNHTTP://EXAMPLE.ORG/JOHNHTTP://EXAMPLE.ORG/GEORGE
VISUALIZATION FILTERS
It is possible to apply visualization filters directly to allthe results. These filters will generate the necessary
code to create a visualizationModel (main.query)
PREFIX cat: <http://dbpedia.org/resource/Category:>
SELECT ?countryLabel (COUNT(?nobel) as ?total) WHERE { ?nobel dcterms:subject cat:Nobel_laureates_in_Physics; a foaf:Person; dbp:placeOfBirth ?country .
?country a schema:Country ; rdfs:label ?countryLabel FILTER(LANG(?countryLabel) = "en")}GROUP BY ?country ?countryLabelORDER BY DESC(?total)LIMIT 100
countryLabel total
United States 23Germany 14England 9Japan 6Austria-Hungary 5France 5Netherlands 4German Empire 3Soviet Union 3United Kingdom 3Italy 3
View (html.template)
<body> <h2>Total of Nobel laureates in Physics by country</h2> {{models.main|GoogleVizPieChart:"countryLabel,total"}}</body>
TABULAR DATA
Easiest case: consider table-based visualizations.View (html.template)
{{models.main|GoogleVizColumnChart:"countryLabel,total"}}
View (html.template)
{{models.main|GoogleVizBarChart:"countryLabel,total"}}
View (html.template)
{{models.main|GoogleVizLineChart:"countryLabel,total"}}
MAPSRepresent data as latitude, longitude and label
SELECT DISTINCT ?city SAMPLE(?lat) AS ?latitude SAMPLE(?long) AS ?longitude ?area WHERE{ ?city a sch:City ; <http://dbpedia.org/ontology/country> <http://dbpedia.org/resource/United_States> ; geo:lat ?lat ; geo:long ?long; dbp:areaTotalKm ?area .
}GROUP BY ?city ?areaORDER BY DESC(?area)LIMIT 10
latitudelatitude longitudelongitude areaarea
45.4983 -91.7389 25.0
30.3167 -81.6667 2292
45.9989 -112.53 1868
View (html.template)
{{models.main|GoogleMaps:"latitude,longitude,area,width=800"}}
PARALLEL COORDINATESQuery
SELECT ?carLabel ?wheelbase ?carWidth ?carLength ?transmission WHERE { ?car dcterms:subject <http://dbpedia.org/resource/Category:Lamborghini_vehicles>; <http://dbpedia.org/ontology/Automobile/wheelbase> ?wheelbase; <http://dbpedia.org/ontology/MeanOfTransportation/height> ?carWidth; <http://dbpedia.org/ontology/MeanOfTransportation/length> ?carLength; <http://dbpedia.org/property/transmission> ?transmission; rdfs:label ?carLabel. FILTER(LANG(?carLabel) = "en")}
PARALLEL COORDINATEScarLabelcarLabel wheelbasewheelbase carWidthcarWidth carLengthcarLength transmissiontransmission
Lamborghini Aventador 2700.0 1136.0 4780.0 7
Lamborghini Reventón 2665.0 1135.0 4700.0 6
Lamborghini 400GT 2550.0 1257.0 4470.0 5
Template
{{models.main|D3ParallelCoordinates:"carLabel,wheelbase,carWidth,carLength,transmission"}}
PARALLEL COORDINATES
GRAPHS
Question: How to express a graph in a table?
Answer: Table child → parent
person1person1 person2person2
Elizabeth Engstrom Ray Bradbury
Neil Gaiman Robert A. Heinlein
Neil Gaiman Ray Bradbury
Model (main.query)
SELECT ?person1 ?person2 WHERE{ ?person1 foaf:knows ?person2 .}
View (html.template)
{{models.main|D3ForceGraph:"person1,person2"}}
TREE STRUCTURESProblem: How do we retrieve a tree as a table?
Solution (so far): Table child,parent with one row with noparent (root)
childchild parentparent areaarea
Averill Park, New York Rensselaer County, New York 8.02896e+06
Sand Lake, New York Rensselaer County, New York 9.36e+07
Schaghticoke (town), New York Rensselaer County, New York 1.3442e+08
Poestenkill (town), New York Rensselaer County, New York 8.44336e+07
Schaghticoke (village), New York Rensselaer County, New York 2.33099e+06
Rensselaer County, New York
TREE STRUCTURESQuery
PREFIX d: <http://dbpedia.org/ontology/>SELECT max(?regionLabel) as ?child max(?superregionLabel) as ?parent (max(?totalArea) as ?area) WHERE{ { ?region d:isPartOf <http://dbpedia.org/resource/Rensselaer_County,_New_York>; d:areaTotal ?totalArea ; rdfs:label ?regionLabel; d:isPartOf ?superregion . ?superregion rdfs:label ?superregionLabel. FILTER(?superregion = <http://dbpedia.org/resource/Rensselaer_County,_New_York>) FILTER(lang(?superregionLabel) = "en") }UNION{ ?region rdfs:label ?regionLabel . FILTER(?region = <http://dbpedia.org/resource/Rensselaer_County,_New_York>) }FILTER(lang(?regionLabel) = "en")}GROUP BY ?regionLabel ?superregionLabel
Template
{{models.main|D3CirclePacking:"child,parent,area"}}
TREE STRUCTURES (2)Query (neruda.query)
PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#>
PREFIX dbp: <http://dbpedia.org/ontology/>
PREFIX d: <http://dbpedia.org/resource/>
SELECT DISTINCT ?child ?parent WHERE{
{
?childNode dbp:influencedBy ?mid ;
rdfs:label ?child .
?mid dbp:influencedBy ?parentNode;
rdfs:label ?parent .
FILTER(LANG(?parent) = "en" && ?parentNode = d:Pablo_Neruda)
}UNION{
?childNode dbp:influencedBy d:Pablo_Neruda;
dbp:influencedBy ?parentNode;
rdfs:label ?child .
?parentNode rdfs:label ?parent .
FILTER(LANG(?parent) = "en" && ?parentNode = d:Pablo_Neruda)
}UNION{
d:Pablo_Neruda rdfs:label ?child
}
FILTER(LANG(?child) = "en")
}
childchild parentparent
Pablo Neruda
Dane Zajc Pablo Neruda
Gary Soto Pablo Neruda
James Tate (writer) Pablo Neruda
Richard Aitson Pablo Neruda
Erin Siegal Pablo Neruda
Jože Snoj Dane Zajc
Rudi Šeligo Dane Zajc
Veno Taufer Dane Zajc
Rigoberto González Gary Soto
Thomas Lux James Tate (writer)
html.template
{{models.main|D3Dendrogram:"child,parent"}}
TREE STRUCTURES (2)
NOW YOU CREATE YOUR OWNVISUALIZATION
Use data that is of interest for you
Describe to tell a story or support a statement
Give me feedback on how does visualbox works foryou