Open Geospatial Consortium

Submission Date: <2020-05-10>

Approval Date:   <2020-06-23>

Internal reference number of this OGC® document:  20-053

Category: OGC® Standards Working Group Charter

Authors:  Kyoung-Sook Kim, Mahmoud Sakr, Nobuhiro Ishimaru

OGC Moving Features Standards Working Group Charter (Amendment)

Copyright notice

Copyright © 2020 Open Geospatial Consortium

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To: OGC members & interested parties

The OGC Moving Features Standards Working Group charter is being amended. The OGC members listed below have proposed this amendment per the purpose clause of the SWG charter amendment below.

The SWG charter amendment provided in this document meets the requirements of the OGC TC Policies and Procedures. The SWG name, statement of purpose, scope, list of deliverables, audience, and language specified in the proposal will constitute the SWG’s official charter. Technical discussions may occur no sooner than the SWG’s first meeting.

This SWG will operate under the OGC IPR Policy. The eligibility requirements for becoming a participant in the SWG at the first meeting (see details below) are that:

  • You must be an employee of an OGC member organization or an individual member of OGC;

  • The OGC member must have signed the OGC Membership agreement;

  • You must notify the SWG chair of your intent to participate to the first meeting. Members may do so by logging onto the OGC Portal and navigating to the Observer page and clicking on the link for the SWG they wish to join and;

  • You must attend meetings of the SWG. The first meeting of this SWG is at the time and date fixed below. Attendance may be by teleconference.

Of course, participants also may join the SWG at any time. The OGC and the SWG welcomes all interested parties.

Non-OGC members who wish to participate may contact us about joining the OGC. In addition, the public may access some of the resources maintained for each SWG: the SWG public description, the SWG Charter, Change Requests, and public comments, which will be linked from the SWG’s page.

Please feel free to forward this announcement to any other appropriate lists. The OGC is an open standards organization; we encourage your feedback.

1. Moving Features

With the development of communication and positioning technology such as Global Navigation Satellite System (GNSS), Wi-Fi, and Beacon, collecting movement data for moving features, typically on vehicles and pedestrians, has become easy. A moving feature is a feature whose location continuously changes over time. A moving feature is widely used in several application domains, such as LBS (Location Based Service), marketing, and public health. These applications have considered not only the current location of features but also the historical data of a feature’s movement. These data are used to analyze the patterns of moving features and provide input to predictive models. Moreover, innovative applications for smart cities require the overlay and integration of moving feature data from different sources to create enhanced social and business values. For example, sharing moving feature data widely and seamlessly helps organizations to handle marketing at the micro-level, trace people contacts in penedemics, make an efficient evacuation plans in the case of a sudden disaster, control autonomous vehicles and personal mobility, and more based on people’s activities and movement conditions.

2. Purpose of the Standards Working Group

The goals for the Moving Features SWG are to develop and maintain enhancements to the moving features standard based on the following issues:

  • Data models and encoding formats to exchange the moving features data including GNSS-logged, network-constrained, semantic, and region-based moving features.

  • Service interfaces based on the emerging OGC APIs and SQL, such as a moving feature service, process service, and so on.

  • Data quality and validation of moving feature data.

  • Support other OGC working groups (SWG and DWG) to use moving feature data in there domains of interest.

3. Business Value Proposition

Market demand is rapidly increasing recently for better integration of moving feature data with GIS and other geospatial technologies. Example applications using moving feature data include:

  • traffic congestion information services using probe cars or taxis equipped with GPS to measure the travel time of each road link;

  • tracking systems on auto-trucks for logistics management, and

  • agent-based road traffic simulation systems for forecasting traffic situations.

The pressing demand on mobility services is driving innovative data-powered solutions such as car-sharing, ride-sharing, mobility as a service MaaS, ECO-routing, and multi-modal to name some. As mentioned as the OGC White Paper “Geospatial Data Science” [OGC 20-001r2], providing the interoperability for heterogeneous applications requiring mobility data of moving features is increasingly important and impactful. This is because the spatiotemporal data analysis will broaden the market for big geospatial data. Systems relying on single-source moving feature data are now evolving into more integrated systems. The integration of moving feature data from different sources is key to developing more innovative and advanced applications. This SWG aims to provide OGC standards for handling and sharing moving features data.

4. Scope of Work

The aim of the Moving Features SWG is to develop new candidate standards for accelerating the eco-system of moving feature data to share and reuse moving feature data by humans and machines. Existing standards for the feature representation do not address the dynamic aspects of location and property. A new candidate standard in preparation of that document as an RFC submission will cover one of the following scopes;

  • Conceptual models: ISO19141:2008 Schema for Moving Features should be referred to as the conceptual data model for the development of candidate standards. The Moving Features SWG will revisit the ISO19141:2008 schema to analyze the schema, whether it can cover new requirements of applications and use cases such as autonomous vehicles, augmented reality, indoor applications, and propagation of disease. A standard data model should describe the movement of zero to three-dimensional geometric features, including changes in attitude or rotation along with the movement.

  • Encodings: The encoding specifications for exchanging moving feature data should be prioritized, which more directly contributes to the system development and the data integration among heterogeneous data sources. The initial proposal is to define the standard and to illustrate it with an XML encoding, but other encodings may be used as well, such as a CSV, JSON, ProtoBuf, or other Binary encoding. The general framework to represent movements of point-based features is a starting point, but its scope should be expanded incrementally through communication and discussions with system developers and potential users.

  • Services: The implementation specifications to access, manage, and process moving feature data with places and times encourage rapid and advanced utilization of movement data across many sectors. The SWG will consider new service interfaces with existing and emerging OGC APIs and SQL to best query and publish various types of movements of features, such as moving points, moving curves, and moving regions.

  • Data quality: Raw location data of moving features contain a large portion of noise and missing location due to obstruction during positioning and the network disconnection. The SWG will discuss a set of quality measurements, an interoperable framework, and/or a guideline to process, validate, and improve the data quality for the sharing of high-quality moving feature data.

4.1. Statement of relationship of planned work to the current OGC standards baseline

The proposed standard will rely upon existing OGC Abstract Specification Topics for basic geometry, coordinate reference systems, and metadata. In particular, the following OGC standards will be taken account into the proposed standard:

  • Topic 1 - Feature Geometry [OGC 01-101]

  • Topic 5 - Features [OGC 08-126]

  • Topic 11 - Metadata [OGC 11-111r1]

  • Topic 19: Geographic information - Linear referencing [OGC 10-030]

  • OGC API - Features - Part 1: Core [OGC 17-069r3]

  • ongoing OGC API standards

4.2. What is Out of Scope?

The following activities are out of scope for the initial OGC Moving Features specification, but may be in scope for future versions of the OGC Moving Features specification, or other related specifications as indicated.

  • Positioning of moving features;

  • The dimensional deformation of the feature’s geometry (e.g., from 1-d geometry to 0-d geometry);

  • Non-rigid 3D features (future or related);

  • The movement and deformation of coverages (related)

  • The succession of either features or their association

4.3. Specific Existing Work Used as Starting Point

  • OGC 19-045r3, OGC® Moving Features Encoding Extension - JSON

  • OGC 16-120r3, OGC Moving Features Access

  • OGC 18-075, OGC® Moving Features Encoding Part I: XML Core

  • OGC 14-084r2, OGC® Moving Features Encoding Extension: Simple Comma Separated Values (CSV)

4.4. Is This a Persistent SWG

[x] YES

[ ] NO

4.5. When can the SWG be Inactivated

The SWG can be inactivated once the final multipart standard has been developed and change requests become minimal or not applicable for consideration. The SWG can be re-activated at any time.

5. Description of deliverables

5.1. Initial Deliverables

The following deliverables will result from the work of this SWG;

  • A final version of Moving Features standard documents for the submission to the TC, and

  • Corresponding schemas associated with Moving Features.

5.2. Additional SWG Tasks

  • Promotion of the proposed standards across Working Groups;

  • Encouragement of a reference open source implemantation;

  • Contribution to any SWG to use the proposed standards for thier use cases; and

  • Collaboration with relevant Working Groups, including but not limited to, Coordinate Reference System DWG, GeoPose SWG, Temporal DWG, GeoAI DWG, and Environmental Data Retrieval API SWG;

6. IPR Policy for this SWG

[x] RAND-Royalty Free

[ ] RAND for fee

7. Anticipated Audience / Participants

Those involved in the design, development, implementation, or use of elements listed above in "Scope of the Work". This includes various service providers, prospective users of the services exposed as the Moving Features Encodings, information architects and bibliographic, metadata, and content provider.

8. Other informative information about the work of this SWG

8.1. Collaboration

The Moving Features SWG encourages communities to share their ideas and comments through communication and collaboration tools, such as GoToMeeting, GitHub, or GitLab, including the OGC portal.

8.2. Similar or Applicable Standards Work (OGC and Elsewhere)

The following standards and projects may be relevant to the SWG’s planned work, although none currently provide the functionality anticipated by this committee’s deliverables:

  • ISO 19141:2008 Geographic information — Schema for moving features

  • OGC Simple Features Specification for SQL

8.3. Details of first meeting

The first meeting of the SWG will be held at the OGC Member Meeting in Munich in September 2020. Call-in information will be provided to the SWG’s e-mail list and on the OGC portal calendar in advance of the meeting.

8.4. Projected on-going meeting schedule

The work of the SWG will be carried out primarily by face-to-face meetings perhaps at each of the OGC Member Meetings with email and conference calls possibly every month.

8.5. Supporters of this Charter

The following people support this proposal and are committed to the Charter and projected meeting schedule. These members are known as SWG Founding or Charter members. The charter members agree to the SoW and IPR terms as defined in this charter. The charter members have voting rights beginning the day the SWG is officially formed. Charter Members are shown on the public SWG page. Extend the table as necessary.



Kyoung-Sook Kim

National Institute of Advanced Industrial Science & Technology (AIST)

Mahmoud Sakr

Université libre de Bruxelles (ULB)

Nobuhiro Ishimaru

Hitachi, Ltd., Defense Systems Division

John Herring

Oracle USA

Steve Liang

University of Calgary

Carl Stephen Smyth

Open Site Plan

Don Sullivan

US National Aeronautics and Space Administration (NASA)

Thomas H. Kolbe

Technische Universität München - Runder Tisch GIS e.V.

Jiyeong Lee

University of Seoul

Ki-Joune Li

Pusan National University

Martin Desruisseaux


Akinori Asahara

Central Research Laboratory, Hitachi, Ltd.

8.6. Conveners

The initial conveners of the Moving Features SWG are:

Kyoung-Sook Kim

Nobuhiro Ishimaru

Mahmoud Sakr