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| LPS (OSNI)
GeoHub NI is the building block for a Spatial Data Infrastructure (SDI). It integrates and exchanges data with other systems within the Northern Ireland Civil Service (NICS), with Public Sector bodies outside the NICS and with private sector organisations. It acts as a spatial data supply chain by electronically pushing data to its customers and enabling customers to pull data from the LPS database, stream mapping to their desktop as needed and enable other Government departments to hold their data on a hub. Northern Ireland was the first region within the United Kingdom to develop a GI Strategy in 2003). GeoHub NI forms a key part of the realisation of this strategy. GeoHub NI The key components in those parts of GeoHub NI provided by 1Spatial are:
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Administration website – this provides a mechanism for uploading and maintaining datasets in GeoHub NI and allows specific users to carry out these tasks. On each upload that is carried out using Safesoft’s FME, the 'data upload controller' (an internal mechanism within the site) allows users to define each data layer in the dataset, add all its metadata, set the appropriate representation and validate the dataset. The validation process is carried out using Radius Studio, which can certify the whole dataset against a pre-defined rules base at the touch of a button. Generic rules can be applied to datasets to check for data quality errors such as kickbacks, spikes and unclosed polygons, and the defined rules base can be extended or modified at any time, to suit changing business or data quality requirements. The rules can also be added to a unified repository, meaning that everyone who has access to them can use and share these rules, which encourages the adoption of a common approach and rule description across an organisation. Validation should be carried out following each dataset upload/republish after editing. The validation report that is produced is appended to the metadata of the relevant dataset to enable users to view it after completion.
Security service – this is a mechanism that secures the dataset layers that are uploaded to GeoHub NI. Once the upload process is complete, the status of the dataset can be set to ‘published’, which automatically moves all of the data and associated metadata into the publication store, where it is viewable in the ESRI client. When a dataset is modified, the user selects that dataset from the publication store and sets the dataset status to ‘staging’. This takes a copy of the published dataset and moves it back into the staging store for editing. On republish, the dataset that remains visible in the map viewer throughout the editing process is overwritten, and the edited version is then viewable. There are OGC server-side proxy applications for the WMS and WFS and the software to secure access to them [via Oracle Web Services Manager]. The security service not only secures the datasets within GeoHub NI, but also secures the ESRI-supplied WFS and WMS, providing a SOAP wrapping around the services to secure them through the Internet. GeoHub NI is an example of a successful solution, which can:
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