A call to science and technology to work on standards for environmental data sharing

Which recent Geoscience related journal article has most influenced your work?

For me it was Laniak et al. (2013) "Integrated Environmental Modeling: A Vision and Roadmap for the Future". With a BSc in Computer Science I had worked in the IT industry before I started in academia. When I read Laniak et al. (2013) my Geography Master’s I knew that that was exactly how I would want to apply my computational background. Laniak et al. presented a vison for the future of integrated environmental modelling. They called to science and technology to work on standards for data sharing, and envisioned web-based platforms for transdisciplinary community interactions. I knew that science is not only about observations and theory. But it was then when I deeply understood how the capabilities of modern computers support research, make it reproducible and, thus, can accelerate research. The potential of linking people and knowledge from different disciplines in order to jointly understand natural processes and to make decisions together overwhelmed me. This landmark paper has since influenced me throughout my PhD and beyond.

Reference:

Laniak, Gerard F, Gabriel Olchin, Jonathan Goodall, Alexey Voinov, Mary Hill, Pierre Glynn, Gene Whelan, et al. 2013. “Integrated Environmental Modeling: A Vision and Roadmap for the Future.” Environmental Modelling & Software 39 (0):3–23. https://dx.doi.org/10.1016/j.envsoft.2012.09.006

SMART Groundwater Portal Dev going full "Cloud"

What a concise quote from Erik Dietrich, founder of DaedTech LLC:

Software developers demand the ability to work effectively from anywhere.  They have attained a coolness factor, and demand for them is so high that there is no need for them to guard their source code like squirrels preparing for winter.  GitHub is a good idea because it effectively captured what software developers really want and offered it to them pretty flawlessly.  GitHub is a zeitgeist that is taking over the world precisely because software developers are taking over the world and software developers really like GitHub. (source)

Although, I work at a research institute which is one half a commercial consultancy with IP to protect, on-going international research collaborations, and governmental research funding require us to be flexible, open and accessible.  I work as a research scientist/analyst programmer in a science department, not in the IT or applications department, and thus, IT infrastructure interaction in commercial entities is "challenging" - for the scientists as well as for the IT folks.

In our current project we embraced the Zeitgeist now, too. For our geodata portal development and deployment processes, we adopted following paradigm:

Google Cloud Platform, Compute and Container Engine with Kubernetes as the our computational platform.

Google Drive, Google Docs and Sheets for assets, functional and implementation specifications development, user stories and use cases.

GitHub as our distributed version control system, which allows us to collaborate, yet, keep contributions transparent and easily and publicly traceable.

Trello eventually serves as our workflow board, for sprints, keeping links of specs, repos and other soft information together. I believe, that we could have done everything in GitHub, but Google Docs and Trello provide gently mechanisms to also invite non-technical folks to contribute. And actually, what we really want is this, right?

Environment Southland Information Management Conference

Regional councils and government agencies are increasingly under pressure to resolve data questions and discover how best to acquire, manage, collate, analyse, report and disseminate data, while managing  the associated costs. Steering organisations through these complex issues requires a solid understanding of what technologies are available and the information demands of the future *(source).

I had the great opportunity to speak at the Environment Southland Information Management Conference in Invercargill. It was a great event, well organised and very informative. I believe I could contribute my part to the line up and fill a few more gaps in the whole picture.
This was not a business as usual conference, it was obvious that the speakers took it serious to cater their presentations to the needs of the stakeholders. And with 70 attendees from regional and central government, as well as visitors from research and industry.

It was great to see the emerging patterns around NZ and similar approaches to a holistic, comprehensive and modern data strategy. If you are interested, this is a link to programme, and please see below for my slides. Watch the talk on Youtube.

Geospatial web-enablement for environmental data in New Zealand

This blog post can be seen as a sequel to a former blog post on the introduction on geospatial data sharing and spatial data infrastructures (SDI), where I explained the basics of OGC standards and web services. Quite some research organisations and governmental agencies already employ OGC standards to make data available online, often even free of charge for the public. I would like to present some really good examples of interoperable data sharing in New Zealand.

Through the standardised and web-based access to so many data sources, not only traditional geographical processing and analysis (GIS) based research is made easier, but also complete new technical and methodological research possibilities arise.

LINZ - Land Information New Zealand

I would like to start with Land Information New Zealand (LINZ). LINZ, as a governmental body, has issued and maintains New Zealand’s geospatial strategy. LINZ runs the LINZ Data Service, which provide tons of NZ-related data sets, topography, maps, place names and much more, almost all of it is available under a NZ Creative Commons license. You can register for free, get an API key and use data directly through web, basically as long as you tell that it is LINZ data. LINZ provides standard OGC CSW, WMS and WFS web service interfaces.

http://data.linz.govt.nz

More news about the NZ geospatial strategy can be found on here.

DOC – Department of Conservation

Also the New Zealand Department of Conservation is going towards geospatial web services. It looks like they use ESRI software, which supports OGC standards to certain bit already, although ESRI (producer of the ArcGIS software) as a commercial closed-source software provider has been known to notoriously neglect open standards. However, the Shapefile format is open and besides ESRI REST services, the DOC Geoportal also allows for OGC-based access (CSW/ISO 19139 metadata for search and discovery and WMS/WFS for map/feature data access)

http://geoportal.doc.govt.nz

GNS Science

The Institute of Geological and Nuclear Sciences is one of the 9 New Zealand Crown Research Institutes (CRI), which conduct about one half publicly/governmentally funded and the other half commercial research projects and, together with the universities of course, can be seen as New Zealand’s main science and research providers, each claiming a particular scientific domains. GNS Science is New Zealand’s leading provider of Earth, geoscience and isotope research and the geological survey of New Zealand. GNS’s research topics also include volcanoes, earthquakes, geothermal features and groundwater.

GNS has published the 1:250 000 Geological Map of New Zealand (QMAP. It is also digitally accessible – GNS exports the QMAP as OGC WMS and WFS in the OGC format GeoSciML. An easy way and very interesting example for interoperability is to explore New Zealand’s geology is through the OneGeology project, which sources and displays such services from geological surveys from all over the world.

The GNS-EU collaborative SMART Acquifer Characterisation programme (SAC) also aims to connect OGC based data sources. Within the research aim “Data Synthesis and Visualisation” the SMART Data Portal aims to develop an integrated OGC framework for discovery, access, processing and visualisation of hydrogeological data.

http://data.gns.cri.nz/metadata/

NIWA – National Institute of Water and Atmospheric Research

NIWA NIWA, another CRI, has a strong reputation in climate, marine and marine ecosystem and biodiversity sciences. Whereas a lot of organisations and agencies make data available first and then (if at all) add more sophisticated search technology, NIWA started the other way round. They established a discovery portal - the Environmental Information Browser, which is basically a catalogue, where one can search by keywords, places, data and time. All the data NIWA has, will eventually be listed and can be queried and also harvested through the OGC CSW interface. Furthermore NIWA is also moving towards providing OGC web services to their data sets. One particular example has been a “Summer of eResearch” project and its progress documented on the eResearch website.

http://ei.niwa.co.nz

Landcare Research

Landcare Research is also a New Zealand Crown Research Institute and focuses on the management of terrestrial biodiversity and land resources in order to both protect and enhance the terrestrial environment. I have come across several Landcare projects on soils and land use data, where Landcare not only uses OGC standards, but also participates in the development and maturing of some of those standards. Like the former parties, Landcare runs a data or geoportal (LRIS), too, which can be accessed and queried through CSW, WMS and WFS web interfaces,

https://lris.scinfo.org.nz/

Landcare also hosts a dedicated soil map portal (S-map), which sources the digital soil information layers based on WMS. Furthermore they drive the development of a global soil map portal (http://www.globalsoilmap.net/), which under the hood, of course, uses OGC standards again. To enable international, comparable, interoperable soil data exchange Landcare participates in the development of a soil information standard.

Outlook

Regional councils are on the way, too. Many regional councils already make data accessible on their web sites. A quick investigation shows for example Environment Waikato, Horizons, HBRC, BOP or Environment Canterbury. However most of these data sources need to be accessed manually and/or do not provide a standardised interface. Not to speak of a generalised way to actually find them. In conjunction with the open data initiatives (Open and Transparent Government , Open New Zealand) and catalogues available ( government datasets online, Open Data Catalogue), there is massive potential to link diverse datasets, relate and analyse seemingly unrelated datasets and gain new insights, find and (re-use) data by type, time and location or just enable ubiquitous mobile access to the data you need. However, we might end up needing a catalogue for the catalogues, and of course a lot of existing data needs to be geo-located/geo-referenced, so that they could be found by location. There is still a way to go and definitely some more research necessary in that space.

Originally posted on the New Zealand eResearch website - 16/04/2013

A side note on geospatial data sharing and spatial data infrastructures (SDI)

This blog post is dedicated to provide a general overview over the field of geospatial and environmental data sharing. The term geospatial is actually tautologous: The prefix “geo” implies geography, which always relates things to each other based on their location, where nearer things are stronger related than things further away from each other (Tobler’s 1st law of geography). And the word “spatial” also means having an extent and location in a space. However “geospatial” nowadays is almost exclusively used in the field of digital data with geographical context. Therefore software that delivers, analyses, presents, processes, stores and retrieves is also often called geospatial software (having its origins in the good old GIS – Geographical Information Systems).

Part 1: GIS and GI Science intro

Research areas that work on the science behind GIS and spatial data, on the analytical methods, processes techniques, on ways of (standardised) spatial data exchange, effective and efficient storage and retrieval, are called GI Science, Geoinformatics, Geomatics, Geocomputation, Spatial Computation or Spatial Science … There is actually quite some discussion, if the necessity, even an entitlement for such a dedicated mixed branch of computer science and geography exists, a similar discussion when geography emerged as an accepted field of research (ref). On the other hand you’ll often find the quote that “80% of data has a spatial component” or something like that. Apparently I can get the source right anymore, therefore you might handle this with care. It might go back to the 1990s when GIS software for PCs wanted to get their feet into the market (gis lounge). However a lot of data in the geosciences have a spatial context and - a lot - of those data are needed for governmental agencies to manage land and water resources properly :smile: Agreed?

Part 2: The Opengeospatial Consortium, aka OpenGIS, aka OGC

“The Open Geospatial Consortium (OGC) is an international industry consortium of 479 companies, government agencies and universities participating in a consensus process to develop publicly available interface standards. OGC® Standards support interoperable solutions that ‘geo-enable’ the Web, wireless and location-based services and mainstream IT.”

The OGC standards framework provides means to build a spatial Data infrastructure (LINZ - Land Information New Zealand) – which is “the technology, policies, standards, and human resources necessary to acquire, process, store, distribute and improve the usability of geospatial data. (SDI) facilitates the connections between these important sources of information, and allows people to find and access them.” Quite some of the OGC standards and web services are also ISO international standards. There are interface and service descriptions on the one hand and data encodings/formats and conceptual data models on the other side. I will provide a short summary:

WMS – Web Mapping Service (ISO 19128 WMS v1.3.0)

Essentially provides (web) maps (as images like png or jpg) output data Geographiclly correct images, png, jpg, view or portrayal service

Major methods: GetCapabilties and GetMap

WFS – Web Feature Service (ISO 19142 WFS v2.0)

Provides an interface to access, query, store and retrieve vector “features”, aka discrete data – like in ESRI shapefiles. Data is accessible by their data schema, which can be soft-typed and values in schema fields and location queries are utilized. Output GML (ISO 19136), which is in a particular “domain-specific” XML schema. With WFS-T – transactional – there is also support to write back to the WFS server.

GetCapabilities GetFeature – get the data DescribeFeatureType – get schema

WCS – Web Coverage Service

Provides an interface to access, query and retrieve raster imagery and coverages, grids (aka “fields”) as in continuous data. eg NetCDF-CF, GeoTIFF, ArcGRID

GetCapabilities DescribeCoverage GetCoverage

CSW – Catalogue Service for Web (ISO 19115 CSW 2.0.2)

Provides an interface to access, query, store and retrieve metadata, aka data about the geospatial data, which is accessible through other geospatial webservices. Output is usually XML ISO 19139 metadata or Dublin core.

GetCapabilities GetRecords – find metadata record by search criteria GetRecordById – get one record by its unique id DescribeRecord – metadata type GetDomain – get range of values and/or keywords

SOS – Sensor Observation Service

Provides an interface to access, query, store and retrieve time-series based data that has been measured at locations, eg through sensors or field surveying/sampling. But the focus is to query on temporal and then on spatial or value comparison basis. Standard output formats are O&M, WaterML2.0 time-series and SensorML sensor/procedure metadata.

SOS is part of the sensor web enablement initiative (SWE) which advances to its version 2, where a lot of things become more flexible, but also moe complicated. I will write about that later ☺ SOS explicitly also describes a group of methods to insert sensor and observation data. This is handled through different profiles.

GetCapabilities GetObservation DescribeSensor

There are quite some commercial and Open Source software packages and tool kits available, for the desktop and server-based for the web that support or where explicitly written for OGC webservices and splendid Open Source resources in the web:

OSGeo Foundation: http://www.osgeo.org

(Spatially enabled) Databases:

• Postgresql/Postgis
• MySQL
• Oracle Database
• Microsoft SQL Server
• ESRI Geodatabase / ArcSDE
• SpatiaLite
• Rasdaman
• GeoCouch

Data Servers (store data in databases):

• Geoserver (WMS, WFS, WCS)
• Mapserver (WMS, WFS, SOS)
• 52°North SOS server
• Geonetwork (CSW)
• ESRI ArcIMS / ArcServer
• Thredds (WCS, netCDF)

Web mapping tool kits / frameworks (take data from data servers):

• openlayers
• Mapbender
• MapFish
• Geomajas
• Flash
• Silverlight

Desktop clients supporting (at least partially) OGC standards:

• QuantumGIS
• uDig
• ESRI ArcGIS
• Intergraph Geomedia

And on it goes … in the next weeks, I will write about New Zealand and international examples of OGC webservices implementations and SDIs for geospatial data publishing (where the data is basically public domain and needs to made accessible) and provide some closer insights to OGC SWE and the next generation sensor networks initiative SWE 2.0 et al.