computer science

PurVIEW

PurVIEW 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 PurVIEW rather than just read about it. In short: PurVIEW is an integrated image display and viewing plug-in software package that incorporates stereoscopic viewing technology for ESRI ArcGIS 9 (or later version). Essentially, PurVIEW is a photogrammetry-based data capture workstation that extend the ArcGIS environment.

Key takeaways

PurVIEW 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 PurVIEW to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of PurVIEW from memory before moving on to harder problems.

Reference excerpt

PurVIEW is an integrated image display and viewing plug-in software package that incorporates stereoscopic viewing technology for ESRI ArcGIS 9 (or later version). Essentially, PurVIEW is a photogrammetry-based data capture workstation that extend the ArcGIS environment. It converts Arc- desktops into precise stereo-viewing windows for geo-referenced aerial or space-borne imagery. Digitizing features directly yields positional accuracy comparable with photogrammetric mapping. Using ArcMap, geodatabase contents can be directly accessed and reviewed superimposed on standard geo-referenced 3-dimensional image models, revealing errors and omissions, or natural changes. PurVIEW's creators, International Systemap, are working with ESRI to develop seamless software integration for the 2010 release of ArcGIS 9.4. PurVIEW is suitable for a number of professional fields, such as mapping, geomatics, geology, forestry and mining.

External links http://www.purview.com/ http://www.mypurview.com/ https://web.archive.org/web/20091016095055/http://www.esricanada.com/EN_products/7098.asp

Worked examples

Example 1 — a first encounter with PurVIEW

Start with the simplest possible case. Write down what PurVIEW 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 PurVIEW 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 PurVIEW 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 PurVIEW

In research: PurVIEW 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 PurVIEW 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: PurVIEW is common in secondary-school and first-year university syllabi. It links to neighbouring topics GIS software, Image processing software, so understanding it makes those chapters shorter.
In everyday life: Look for PurVIEW 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 PurVIEW in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what PurVIEW 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 PurVIEW out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is PurVIEW in simple terms?

Why does PurVIEW 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 PurVIEW?

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 PurVIEW.