Glossary

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Looking for a quick definition?

We’ve got loads of key subject terms in our subject glossaries. There are three ways of finding what you are looking for:

  • First click on the letters of the alphabet to browse for terms.
  • Select a subject from the drop-down menu above to filter the terms by Subject.
  • Or lastly, type the term you are looking for into the search box.

EXAMPLES

Here are some examples of the kinds of definitions you’ll find on this page.

Subject:

(also called an orthophoto map) a combination of a vertical aerial photograph and a map

Subject:

a combination of a vertical aerial photograph and a map

Subject:

correction of distortion in any image which is created from above the ground (for example,...

Subject:

the solid outer part of the Earth's core

Subject:

the top layers of soil and rock in an open-cast mine

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