PeriodO Client
A web application for browsing and editing PeriodO data.
Development
NPM is required for development. Run npm install from the project directory
to set up a development environment.
This application uses browserify to structure code.
The main entry point is src/index.js. Run make build to bundle
the application or make watch to use watchify
to automatically bundle as files are edited.
Tests are run using PhantomJS run with mochify.
Use npm test to run all tests.
CORS proxy
Because this is a browser-base application that makes frequent use of
cross-origin linked data, it is often necessary to tunnel requests through a
proxy that adds CORS headers or fixes broken CORS implementations. The proxy URL
is configurable, and can be changed in the CORS_PROXY_URL variable
defined in src/linked_data_cache.js.
Sample country data
The pregenerated data to select spatial regions was obtained from DBPedia using the following SPARQL query:
PREFIX dbo: <http://dbpedia.org/ontology/>
PREFIX dbprop: <http://dbpedia.org/property/>
PREFIX foaf: <http://xmlns.com/foaf/0.1/>
PREFIX owl: <http://www.w3.org/2002/07/owl#>
SELECT
?place,
(sample(?label) as ?Label),
(sample(?geonamesURI) as ?GeonamesURI),
(sample(?depiction) as ?Depiction)
WHERE {
?place a dbo:Country .
?place rdfs:label ?label .
?place foaf:depiction ?depiction .
?place owl:sameAs ?geonamesURI .
FILTER langMatches(lang(?label), 'en') .
FILTER regex(str(?geonamesURI), 'geonames\\.org') .
FILTER regex(str(?depiction), 'svg', 'i')
}
GROUP BY ?place