OGC RESTful Encoding of Ordering Services Framework For Earth Observation Products. Version 1.0.

Abstract

This OGC Best Practices document specifies the interfaces, bindings, requirements, conformance classes that enable complete workflows for ordering Earth Observation (EO) data products. In fact it provides the interfaces for supporting the following EO Product ordering scenarios: -- Ordering products from EO Catalogues -- Subscribing to automatic delivery of EO products -- Bulk EO Product orders The EO products orders can be delivered on file via different online protocols (e.g. ftp, sftp, ftps, etc.). The ordered items can be customized in detail, one by one or altogether, via the processing options and scene selection options. These options are dynamically discovered and set from the clients by calling appropriate methods of Ordering Services resources. This specification includes a comprehensive list of processing options (Table 7-25) and scene selection options (Table 7-26) derived from the parent specification OGC 06-141r6 which gathered inputs from several Satellite Agencies and Operators: -- ESA -- EUMETSAT -- CNES -- DLR -- CSA -- SPOT Image In case these already identified options are not sufficient for the specific mission, they can be extended following the SWE Common 2.0 framework. In Annex A, B, C there are possible examples for new ESA Sentinel missions. This document is based on the standard: OGC 06-141r6 Ordering Services Framework for Earth Observation Products Interface Standard V1.0.0 That was initially produced during the ESA HMA (Heterogeneous Missions Accessibility) initiative [OR1] and related projects. With respect to the parent specification this Best Practice document proposes the following changes: **Replaces SOAP with REST for service encoding.This affects not only the way the service is implemented, but also the way the standard is presented and described. In fact basing on REST implies that the service has to be described in terms of resources and methods applied on them while in SOAP services the description is focusing on operations and in fact the OGC 06-141r6 is structured in Web Service operations. -- Usage of OpenSearch Description Documents as alternate method for describing Ordering Options (§7.3.2.2). This specification uses the order options model already described in the OGC 06-141r6 standard, with some minor updates, that is now referred as “Canonical XML format”, but defines also an additional method for describing order options within Open Search Description Documents. Actually this part of the specification can be considered as an Open Search extension for order options. This part of the specification is meant to be used when the EO products can be directly downloaded after a catalogue interaction with possible application of some order options (§6.3.3). -- Simplification of the interfaces focusing on a sub-set of the scenarios supported by the parent specification: no future products orders supported, no orders on media.