GEOSS Component and Service Registry (CSR) Architecture and Registration Prof. Liping Di Director Center for Spatial Information Science and Systems (CSISS) George Mason University Fairfax, VA, 22030, USA April , 2017

Introduction GEOSS CSR is a web system where Earth Observation resources contributed to GEOSS are registered through dedicated secured registration forms. Resource providers (e.g., government agencies and organisations) could register their resources in CSR by providing essential details about the name, contents, Earth observation vocabulary, standards and special arrangements (if any) of their contribution. Assists the GEOSS, and ultimately the user, to identify the GEOSS resources of interest.

Current CSR Highlights Currently there are 1427 user accounts and 867 approved registered resources in the CSR system ISO19115 and ISO19119 were utilized as basic information model for resource registration. Information model under ISO family not only facilitates the interaction within GEOSS community (i.e. harvesting resources from CSR), but also enhances the interoperability between external GEOSS clients and CSR. Leverages state of the art GeoNetwork as back-end geo-spatial catalog. OGC CSW interface in GeoNetwork enhances both query ability and interoperability of CSR. Security Mechanism - Encryption mechanism secures the user information in system (i.e. password) and the privilege management in back-end GeoNetwork guarantees a secured metadata discovery and access.

CSR CSW API The GEOSS registry exposes OGC CSW interfaces to be accessed by other applications, including GEO Discovery and Access Broker. GEO Discovery and Access Broker implementations can use the GEOSS registry to register and locate GEOSS catalog services as a basis for evaluation, configuration, harvest, and distributed query. CSR CSW Interfaces http://geossregistries.info/geonetwork/srv/en/csw GetCapabilities operation allows CSW clients to retrieve service metadata from a server. DescribeRecord operation allows a client to discover elements of the information model supported by the target catalogue service

CSR and SIR Interaction Providers can nominate new “Standards and Special Arrangements” for approval via CSR All the current “Standards and Special Arrangements” are populated in CSR for user to associate their resources.

CSR System Architecture GEO Discovery and Access Broker

CSR Architecture Resource Providers via Secured Web Portal can Register New Resource and place approval Request Modify/Delete Resource he/she owns Search/View all Registered Resources Resource Users (without user account) can Search/View Only Approved Resources (non-secure search/holding pages) Create User Account to become Resource Provider CSR Operational Team Reviews the registered (pending) Resources and approves them (if qualifies) to be visible for harvesting GEO DAB Harvests the approved resources via CSW interface

Resource Registration (Overview) Basic Info Resource Category, Name, Abbreviation, Description, Resource Accessibility, GEO Affiliation Start Properties Contact Info, Societal Benefit Areas, Resource Availability, Sharing Properties, Geographic Extent, Temporal Extent Standards Earth Observation Vocabulary Standard/Special Arrangements * Submit Request * For Resource Category :”Datasets” , “Analysis and Visualization”, “Alerts, RSS, and Information Feeds”, and “Catalogues, Inventories and Metadata Collections” , the Standard/Special Arrangements are mandatory field with at least one entry from either “Data Access” , “Catalog/Registry Service”, Portrayal and Display Service”, or “Data Transformation Services”

Resource Registration – Basic Info

Resource Registration - Properties

Resource Registration – Properties

Resource Registration - Standards

Total Resources and Types – Approved * Resource Types Total Resources Datasets 144 Monitoring and Observation Systems 76 Software and applications 60 Initiatives 16 Websites and documents 200 Analysis and visualization 252 Catalogues, Inventories and Metadata Collections 113 Computational Models 1 Alerts, RSS, and Information Feeds 6 867 * As of 3/29/2017

User Access Statistics From Jan 1, 2015 – March 28, 2017 Total user sessions were 8740 Average session duration of 1 minute and 23 seconds Majority of users from USA – 30% Users from other major countries such as Brazil, UK, China, Germany, Italy, Russia, Spain, and Japan were between 2% to 5 %. The uptime for the CSR service was 99.9%

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