science

Spatiotemporal database

Spatiotemporal database is a 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 Spatiotemporal database rather than just read about it. In short: A spatiotemporal database is a database that manages both space and time information. Common examples include: Tracking of moving objects, which typically can occupy only a single position at a given time.

Key takeaways

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

Reference excerpt

A spatiotemporal database is a database that manages both space and time information. Common examples include:

Tracking of moving objects, which typically can occupy only a single position at a given time. A database of wireless communication networks, which may exist only for a short timespan within a geographic region. An index of species in a given geographic region, where over time additional species may be introduced or existing species migrate or die out. Historical tracking of plate tectonic activity. Spatiotemporal databases are an extension of spatial databases and temporal databases. A spatiotemporal database embodies spatial, temporal, and spatiotemporal database concepts, and captures spatial and temporal aspects of data and deals with:

Geometry changing over time and/or Location of objects moving over invariant geometry (known variously as moving objects databases or real-time locating systems).

Implementations Although there exist numerous relational databases with spatial extensions, spatiotemporal databases are not based on the relational model for practical reasons, chiefly among them that the data is multi-dimensional, capturing complex structures and behaviours. As of 2008, there are no RDBMS products with spatiotemporal extensions. There are some products such as the open-source TerraLib which use a middleware approach storing their data in a relational database. Unlike in the pure spatial domain, there are however no official or de facto standards for spatiotemporal data models and their querying. In general, the theory of this area is also less well-developed. Another approach is the constraint database system such as MLPQ (Management of Linear Programming Queries). GeoMesa is an open-source distributed spatiotemporal index built on top of Bigtable-style databases using an implementation of the Z-order curve to create a multi-dimensional index combining space and time. SpaceTime is a commercial spatiotemporal database built on top of the proprietary multidimensional index similar to the k-d tree family, but created using the bottom-up approach and adapted to particular space–time distribution of data. In a study conducted by Ericsson, SpaceTime significantly outperformed GeoMesa.

See also Geographic information system § Adding the dimension of time Historical geographic information system Locating engine Multimedia database Structure mining Time geography

References

External links

Organizations https://vldb.org/ (Very Large Databases) https://www.dexa.org/ (Database and Expert Systems Applications)

Implementations https://secondo-database.github.io/ (Secondo)

Worked examples

Example 1 — a first encounter with Spatiotemporal database

Start with the simplest possible case. Write down what Spatiotemporal database claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In 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 Spatiotemporal database 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 Spatiotemporal database 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 Spatiotemporal database

In research: Spatiotemporal database appears in 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 Spatiotemporal database 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: Spatiotemporal database is common in secondary-school and first-year university syllabi. It links to neighbouring topics Database management systems, Database stubs, Geographic data and information, so understanding it makes those chapters shorter.
In everyday life: Look for Spatiotemporal database 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 Spatiotemporal database in 20 minutes

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

Frequently asked questions

What is Spatiotemporal database in simple terms?

A spatiotemporal database is a database that manages both space and time information. Common examples include: Tracking of moving objects, which typically can occupy only a single position at a given time.

Why does Spatiotemporal database matter?

Because it connects several 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 Spatiotemporal database?

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 Spatiotemporal database.