computer science

Sedris

Sedris is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Sedris rather than just read about it. In short: SEDRIS (Synthetic Environment Data Representation and Interchange Specification) is an international data coding standard infrastructure technology created to represent environmental data in virtual environments. Environmental data represented by SEDRIS may be concrete, such as trees and mountains, or abstract, such as the behavior of light.

Key takeaways

Sedris belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Sedris to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Sedris from memory before moving on to harder problems.

Reference excerpt

SEDRIS (Synthetic Environment Data Representation and Interchange Specification) is an international data coding standard infrastructure technology created to represent environmental data in virtual environments. Environmental data represented by SEDRIS may be concrete, such as trees and mountains, or abstract, such as the behavior of light. The infrastructure frees users to place their focus on application development and also facilitates the exchange of data for reuse and wider scrutiny. Research into shared ways to represent environmental data was begun in the 1980s in order to permit distributed simulations to work together. SEDRIS was launched in 1994 by program managers of the United States Army's Simulation Training and Instrumentation Command and the US Department of Defense's Defense Advanced Research Projects Agency.

Standardization SEDRIS has led to forming the series standards of

ISO/IEC 18023:2006(E) Information technology - SEDRIS - ISO/IEC 18023-1:2006(E) Information technology - SEDRIS - Part 1: Functional specification Archived 2009-06-17 at the Wayback Machine ISO/IEC 18023-2:2006(E) Information technology - SEDRIS - Part 2: Abstract transmittal format Archived 2009-10-12 at the Wayback Machine ISO/IEC 18023-3:2006(E) Information technology - SEDRIS - Part 3: Transmittal format binary encoding Archived 2009-10-12 at the Wayback Machine ISO/IEC 18024-4:2006(E) Information technology - SEDRIS language bindings - Part 4: C Archived 2009-10-12 at the Wayback Machine ISO/IEC 18025:2005(E) Information technology - Environmental Data Coding Specification[link removed] (EDCS) ISO/IEC 18026:2006(E) Information technology - Spatial Reference Model Archived 2009-06-15 at the Wayback Machine (SRM) ISO/IEC 18041-4:2005(E) Information technology - EDCS language bindings - Part 4: C Archived 2010-07-04 at the Wayback Machine ISO/IEC 18042-4:2006(E) Information technology - Spatial Reference Model (SRM) language bindings - Part 4: C Archived 2009-10-12 at the Wayback Machine

See also 3D Computer Graphics Environmental management system Geographic information system Glossary of Military Modeling & Simulation Environment Simulation Interoperability Standards Organization

References

External links SEDRIS - Environmental Data Representation & Interchange (home page)

Worked examples

Example 1 — a first encounter with Sedris

Start with the simplest possible case. Write down what Sedris claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Sedris before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Sedris ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Sedris

In research: Sedris appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Sedris in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Sedris is common in secondary-school and first-year university syllabi. It links to neighbouring topics GIS software, Synthetic environment, so understanding it makes those chapters shorter.
In everyday life: Look for Sedris outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Sedris in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Sedris means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Sedris out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Sedris in simple terms?

Why does Sedris matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Sedris?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Sedris.