Data Sharing and Publishing...

HISTORICAL & ReaL-Time

http://slides.com/rfarren/oceanwise-data-publishing/live

  • What do we mean by publishing data?
     
  • Publishing data - traditional methods
     
  • Publishing data - web services
     
  • Case Study (Ocean Database GeoServer & OpenLayers)
    - Publishing historic and real-time data
    - Publishing non-spatial data
    - Publishing re-purposed map outputs

in this presentation:

http://slides.com/rfarren/oceanwise-data-publishing/live

What do we mean by publishing data?

Exporting Data?

Styling data to create a map?

Making data available (sharing)?

Producing meaningful metadata?

Making data searchable so it can be found?

a combination of all of these?

From data - to published data

Data

Map

+ Styles

Crown Copyright 2014 - Not to be used for navigation

From data - to published data

Map

Useful Map

+ Metadata

Crown Copyright 2014 - Not to be used for navigation

From data - to published data

Useful Map

+ Open Formats

GeoJSON

SpatiaLite

GeoTIFF

Useable Map

Crown Copyright 2014 - Not to be used for navigation

GeoJSON

SpatiaLite

GeoTIFF

From data - to published data

Useable Map

Searchable

Accessible

  • Data Registers
  • URI's - Linked Data
  • Search Engines
  • File download services
  • Online data portals
  • Web Services (WMS WFS WCS)

Published Data!

Data

Data + Styles = Map

Map + Metadata = Useful map

Useful Map + Open Data format = Useable map

Useable Map + Searchable + Accessible = Published Map!

The data publishing pyramid

Does a PDF document count as published data?

YES!

...

...

but...

to be truely published it needs to:

  • contain or reference appropriate metadata
     
  • be searchable (this means online)
     
  • be accessible (this means online)

Publishing data - traditional methods

Spatial

FTP

CD-ROM / USB drive

Published data links

http://mysite.com/data/mydata.json

http://mysite.com/metadata/mydata.xml

Publishing spatial data - web services

What are they?

  • Standardised ways to deliver spatial data content via the web, as a response to url requests.
  • The most common are: WMS, WFS, WCS

How can I use them?

  • By entering a valid url request in a browser
  • By embedding a web service client within a web page
  • Using GIS software

=

Publishing spatial data - web services

Here is a GET command for a WMS:

Publishing spatial data - web services

What's so good about web services?

  • Access data as needed - directly into the application for which it will be used.
  • Link to the data directly from the metadata / data register / website.
  • Control who can access the data and how + who can edit and who can view.
  • Update data effortlessly and seamlessly

I want one - can I get my own?

YES! Publishing data with web services is easy

now

Case Study - Ocean Database and Geoserver

Using Geoserver to publish a variety of spatial datasets from Ocean Database and consuming them using OpenLayers

  • An open source package to host web services
  • Recognised and supported by the OSGeo community
  • Makes it easy to produce/manage web services
  • Driven by a simple web interface

What is GeoServer?

Case Study - Ocean Database and Geoserver

What Data?

A variety of slow-changing and real-time data provided by ABP Southampton including:

  • Bathymetric survey data
  • Designated survey areas and currency
  • Designated dredge areas and schedules
  • Mooring areas
  • Real-time envionmental monitoring data
  • Asset management data (navigational aids)
  • Real-time hazardous activity data (diving, hot works, refuelling)

Case Study - Ocean Database and Geoserver

Concept:

Ocean Database

GeoServer

OpenLayers

Stores & manages historical and real-time data

Processes data into published web services

OpenSource Javascript library creates user interface in web-browser

Case Study:

Ocean Database | Geoserver |OpenLayers

Result:

Crown Copyright 2014 - Not to be used for navigation

Basemap - ENC WMS by Geomod

Case Study:

Ocean Database | Geoserver |OpenLayers

Crown Copyright 2014 - Not to be used for navigation

Surveys - Depth areas produced by Maritime Toolbar

Case Study:

Ocean Database | GeoServer |OpenLayers

Crown Copyright 2014 - Not to be used for navigation

Surveys - Re-purposing with GeoServer to show target depth achievement

Case Study:

Ocean Database | GeoServer |OpenLayers

Crown Copyright 2014 - Not to be used for navigation

Designated survey areas - real-time link with data currency

Case Study:

Ocean Database | GeoServer |OpenLayers

Copyright 2014 Boscalis and ABP Southampton

Other datasets to be included:

Real-time environmental monitoring data including threshold alerts and attribute display

Case Study:

Ocean Database | GeoServer |OpenLayers

Other datasets to be included:

Real-time environmental monitoring data including threshold alerts and attribute display

How?

  • New records entered in Database as live data arrives
  • GeoServer marks affected WMS tiles for update
  • OpenLayers loads new data every minute

Case Study:

Ocean Database | GeoServer |OpenLayers

Copyright 2014 ABP Southampton

Other datasets to be included:

Asset Management data. Data sheets about Navaids can be entered into Ocean Database and published in the web service to the relevant port personnel or wider

Case Study:

Ocean Database | GeoServer |OpenLayers

Other datasets to be included:

Asset Management data. Data sheets about Navaids can be entered into Ocean Database and published in the web service to the relevant port personnel or wider

How?

  • Excel data loaded to Ocean Database
  • GeoServer responds to WMS GetFeatureInfo request - providing attribute data to the client
  • OpenLayers displays the attribute data in a web-layout, alongside spatial data

Case Study:

Ocean Database | GeoServer |OpenLayers

For demo's and discussions:

Please come and see me during the break

Thank you for listening!

OceanWise - Data Publishing

By Rich Farren

OceanWise - Data Publishing

Data Sharing and Publishing... Historical and Real-time. Presented at the OceanWise Marine GIS user conference, November 18th 2014, London UK.

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