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Setting up and testing NSG and DGIWG Profiles
This document provides an overview of setting up and testing National System for Geospatial Intelligence (NSG) and DGIWG profiles based on Open Geospatial Consortium (OGC) standards. It discusses NSG profiles for GeoPackage, WMS, WMTS and WFS standards and highlights from implementing compliance tests. It also describes the OGC validation tools and process for certifying compliance with OGC standards.
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Setting up and testing NSG and DGIWG Profiles
- 2. LUIS BERMUDEZ Executive DirectorInnovation Program April 24, 2018
- 3. SETTING UP ANDTESTING NSG AND DGIWG PROFILES
- 4. Outline • OGC Introductionand Standards Overview • NSG OGC Profiles • OGC Validation Tools • OGC Certification
- 5. OGC Introduction and StandardsOverview
- 6. Data can comefrom different places
- 7. 7 21 Billion ConnectedDevices in the Global Internet of Things in 2020
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- 10. Variety'L'Models' Short Term LongTerm What do they have in common?
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- 13. Each layer islike a source Each source can be provided as a service
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- 18. 18 OGC open standardsprovide the common interfaces e.g. Web Map Service (WMS)
- 19. 19 Interoperability Increase ability toaccess, fuse and apply diverse content when and where needed is critical to situational awareness and disaster planning/ response in cross-boundary and cross-domain settings.
- 20. 20 Interoperability in thecontext of Intelligence, Surveillance, and Reconnaissance (ISR) J28 division chief from http://www.jfcom.mil/newslink/storyarchive/2007/pa071607.htm doesn’t have to worry about where his information is coming from plug and play ISR capabilities
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- 22. 22 Open Geospatial Consortium(OGC) Leading International consortium for advancing open geospatial standards
- 23. 23 Open Geospatial Consortium(OGC) • 70 standards • 550 members • 5000 users in the portal • 100 innovation projects • 230 compliant products • 900 implementations
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- 25. Open Standards • Freelyand publicly available • Non discriminatory • No license fees • Vendor neutral • Data neutral • Based on consensus
- 26. 26 Standard … and arewidely implemented For WMS 41 organizations 92 compliant products 3 reference implementations Randomly selected complete list at http://www.opengeospatial.org/resource/products
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- 30. 30 WMS • The OGCWeb Map Service Interface Standard (WMS) defines a set of interfaces (e.g. the rule of how to encode the URL) for requesting map images over the Internet. • WMS makes it easy for a client to request images on demand changing parameters such as size and coordinate reference systems.
- 31. 31 GetMap - RequestExample Link
- 32. 32 Web Feature Service(WFS) Web Service used to: • Publish Features • Access Features • Edit Features
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- 34. 34 Geographic Markup Language(GML) • Defines an abstract feature model • Provides XML Schemas • Provides primitives: – Geometry – Feature Types – Coordinate Reference Systems • Topology
- 35. 35 OGC SensorThings API Interfacefor Internet of Things http://developers.sensorup.com/docs/
- 36. 36 Querying data frombike stations • Endpoint: http://toronto-bike- snapshot.sensorup.com/v1.0/
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- 38. What do wewant? http://www.spatiallyadjusted.com/2012/12/20/ogc-draft-geopackage-specification/
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- 43. NSG Profiles Introduction •Is National System for Geospatial Intelligence • …the combination of technology, policies, capabilities, doctrine, activities, people, data, and communities necessary to produce geospatial intelligence in an integrated multi-intelligence, multi- domain environment. (NSG Statement of Strategic Intent, March 2007) • NSG Defines an enterprise architecture • The architecture is based on standards
- 44. Profile • is asubset of a standard (selected subset of conformance classes) • imposes additional constraints on an existing standard • profile can also be extended to offer specialized functionality (called profile with extensions)
- 45. National Spatial Agency(NSG) Profiles • NSG GeoPackage 2.1 (raster and vector data), based on the OGC GeoPackage 1.1 • NSG WMS 1.0 (raster data), based on the OGC WMS 1.3 • NSG WMTS 1.1 (raster data), based on the OGC WMTS 1.0 • NSG WFS 1.0 (vector data), based on the OGC WFS 2.0 Note: These are the only ones that have an OGC Test
- 46. Highlights of implementingprofiles • Report: OGC Testbed-13: Executable Test Suites and Reference Implementations for NSG WMTS 1.0 and WFS 2.0 Profiles with Extension http://docs.opengeospatial.org/per/17-043.html
- 47. NSG WFS 1.0Operations • GetCapabilities • GetPropertyValue • GetFeature • DescribeFeatureType • ListStoredQueries • DescribeStoredQueries • LockFeature • GetFeatureWithLock • Transaction • CreateStoredQuery • DropStoredQuery • PageResults
- 48. NSG WFS 1.0– new operation: PageResults • Better navigation support (e.g. Big Data) • Requires Servers to store interim results
- 49. Current Pagination Support Requiressequential navigation
- 50. NSG WFS -PageResults • 1) get resultSetID
- 51. NSG WFS -PageResults • 2) use the resultSetID to navigate the results
- 52. NSG – WFS– Feature Versioning • restricts the notion of versioning to a time-based versioning approach • getting changes that happened since their last update • Two type of identifiers – Instance Resource Identifier - uniquely identifies each version of a certain feature (use by GetResourceByID) – Entity Resource Identifier - identifies the entity that is represented by the feature. Multiple versions of an entity should have the same entity identifier. (entity identifier should be encoded in the name attribute of the AbstractGML element
- 53. NSG WMTS Profile •Requires REST interface to be exposed • Coordinate systems CRS:84 WGS84 and EPSG:4326 WGS84 • Support for projections EPSG:3395, EPSG:5041 and EPSG:5042. Scales for World Mercator EPSG:3395 • MIME types, image formats: image/png, image/jpeg and image/gif • GetFeatureInfo request must support text/xml, text/html and application/gml+xml; version=3.2 • Caching information (expiration data) for the data must be provided using HTTP control headers.
- 54. NSG WMS Profile •A DGIWG WMS server shall be able to provide all mandatory and optional service metadata elements based on NSG Metadata Foundation (NMF) . • Coordinate systems CRS:84 WGS84 and EPSG:4326 WGS84 • MIME types for raster formats: image/png, image/jpeg and image/gif • If vector based server should provide image/svg+xml • Keywords lists …
- 55. NSG WMS Profile •A DGIWG WMS server shall be able to provide all mandatory and optional service metadata elements based on NSG Metadata Foundation (NMF) . • Coordinate systems CRS:84 WGS84 and EPSG:4326 WGS84 • MIME types for raster formats: image/png, image/jpeg and image/gif • If vector based server should provide image/svg+xml • Keywords lists …
- 56. NSG WMS Profile •A DGIWG WMS server shall always provide at least one style element and that style shall be advertised even if it's only the default style. • The MaxWidth and MaxHeight shall be greater or equal to 800 pixels. • Each vector data layer's style shall have an associated legend, available as an image in one of the following formats: PNG, GIF or JPEG and available via LegendURL. • A DGIWG WMS service should be configured to serve requests that range from at least 4x to at least 0.25x the native scale(s) or resolution(s) of the underlying datasets".
- 57. NSG GeoPackage • NSGtile matrix sets • NSG adopted GeoPackage extensions • Metadata compliant with the NSG Metadata Foundation (NMF) Version 2.2
- 58. Reference Implementations • Demosetting up reference implementations
- 59. Compliance Testing -Tests • https://github.com/opengeospatial/ets-wfs20-nsg • https://github.com/opengeospatial/ets-wms13-nsg • https://github.com/opengeospatial/ets-wmts10-nsg/ • https://github.com/opengeospatial/ets-gpkg12-nsg
- 60. Compliance Testing –Web validator Beta Environment • http://cite.opengeospatial.org/te2/
- 61. Demo Using Docker •Link and detail about the demo can be found here: https://goo.gl/HG67wd • Main page with information about running the OGC validation tool in Docker: https://github.com/opengeospatial/teamengine-docker
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- 65. 65 How long thisit take? • Once the application is passing the test (1-2 months), organizations asking for compliance can: • Make an online request 5-10 minutes. • OGC will verify and respond in 1-3 days.
- 66. 66 What if yourapplication is not passing the test? • Use the community forum citeforum@lists.opengeospatial.org • About 300 members participate in the forum: – Each test suite has a lead – OGC has alliances with groups supporting the test (answering questions, fixing bugs, etc.)
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- 69. 69 Hos to askfor Compliance “ Purchaser seeks geospatial products that provide maximum interoperability with purchaser’s and data sharing partner’s systems. To accomplish this, purchaser seeks to make maximum use of open standards provided by the Open Geospatial Consortium (OGC), ISO ...” OGC Compliance Overview - Guide for Software Acquisition White paper (15-002r5) http://docs.opengeospatial.org/wp/15-002r5/15-002r5.html
- 70. 70 How to verify that aproduct is compliant?
- 71. 71 Links • OGC validationportal: https://github.com/opengeospatial/teamengine • Source code Test code repositories https://github.com/opengeospatial?page=2&query=ets • Building the testing facility on the cloud https://github.com/opengeospatial/teamengine-builder/blob/master/build-amazon-instance.rst • Virtualization Guide https://github.com/opengeospatial/teamengine/blob/master/src/site/asciidoc/virt-guide.adoc
- 72. Contact Information • LuisBermudez • lbermudez@opengeospatial.org • Twitter: @berdez • https://www.linkedin.com/in/bermudez
Editor's Notes
- #8 Global Internet of Things Gartner group
- #21 The goal is that we get ISR to the point where the warfighter doesn’t have to worry about where his information is coming from, he just knows that we have the capability to “plug and play” ISR capabilities in to the mix so that his information needs are met – with timeliness and precision
- #39 What is this guy talking about? - How can I share something that is SQLlite contained That i based on one of the most popular vector data models - Simple Features That can support raster and tiles