Download - JavaScript Client Libraries for the (Former) Long Tail of OGC Standards

JavaScript Client Libraries for the (Former) Long Tail of OGC Standards

FOSS4G-Europe, Bremen, July 2014

Daniel Nüst (52°North GmbH), Matthes Rieke (52N), Paul Breen (BAS)

SOS.js & wps-js @ FOSS4G-E, Bremen, 2014 2

http://commons.wikimedia.org/wiki/File:Long_tail.svg


2014JavaScript is on the rise (node, JS engines)

Cloud

jQuery

AngularJS, Dojo, ExtJS, …

OpenLayers, Leaflet, GeoExt, …


Motivation

Create generic client libraries because…

applications move to the browser,WPS and SOS reach(ed) 2nd version,need to build apps, and

we don’t want to repeat ourselves.


SOS.JS AND WPS-JSComing up: new project introduction and demonstration


WPS-JS


About wps-js

JavaScript WPS Client to build interactive forms to control standardized processes.

Build on: OpenLayers (requests, XML)

GitHub: https://github.com/52North/wps-js


htt

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OGC WPS“Geo-ready” web processing standard

GetCapabilitiesDescribeProcessExecute

WPS-G, WPS-T

More: http://www.ogcnetwork.net/wps


wps-js FeaturesForm generation based on process descriptions

WPS 1.0.0

Interactive execution of processes

Pre-configuration of UI/form

Style-free


Demo

http://nuest.github.io/wps-js/http://geostatistics.demo.52north.org/wps/client.htmlhttp://geoviqua.dev.52north.org/wps-js-client/

Simple calculatorTable output

Data intercomparison and colocation(pre-configuration)


http://geoviqua.dev.52north.org/wps-js-client/demo/geca-intercomparison/client.html?

source=Testlink&_pdPortlet_WAR_geoportal_uuid=067a17f9-8d37-4d15-b405-

25e701dd03b0&_pdPortlet_WAR_geoportal_uuid=31172be3-01ae-4d4d-b500-

8e734a1d5432&hide=false


SOS.JS


About SOS.jsJavascript library to browse, visualise, and access, data from an OGC Sensor Observation Service.

Basis: OpenLayers

GitHub: https://github.com/52North/sos-js

History…


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Live Demos

http://basmet.nerc-bas.ac.uk/sos/http://52north.github.io/sos-js/http://sensors.geonovum.nl/sos-js-test/sos-app-test.html

[integrated in 52°North SOS]


ExperiencesShortest path to beta (OL)

Raw time series data can be handled in JSXML is possible, of course JSON is simpler…

Hard to reach “completeness” when driven by projects

Be aware of CORS when you deploy services


GoalsUseful and usable libraries for application developers (not SWE/processing experts)

Facilitate usage of WPS and SOS

Minimal footprintFlexible use (domain applications)

User-friendly interfaces

Non-copyleft licenses

Be used by OpenLayers


Steps1) Become independent…

from mapping librariesfrom specific frameworksmodularizerelease version 1.0

2) Extend developer/user community

3) Ease usage (plugins for JS libs/JS mapping)


Challenges

“lib-independent library”

JavaScript modularization

Coordination and community building

Testing and service compatibility


@FiveTwoN

http://blog.52north.org/

52north.org/communities/

Is there a (technical, organisational) way to build a compatible JavaScript OGC client across all standards?

Download - JavaScript Client Libraries for the (Former) Long Tail of OGC Standards

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