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Lesson Navigation IconStatistics for Thematic Cartography

Unit Navigation IconBasic Statistic Rules

LO Navigation IconNominal Data

LO Navigation IconOrdinal data

LO Navigation IconNumeric data

LO Navigation IconThe Importance of Classification

LO Navigation IconData Preparation

LO Navigation IconBasic Classification Rules

LO Navigation IconSummary

Unit Navigation IconStandardisation and Classification

Unit Navigation IconStatistics for Thematic Cartography Evaluation

Unit Navigation IconSummary

Unit Navigation IconRecommended Reading

Unit Navigation IconBibliography

Unit Navigation IconMetadata

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Basic Statistic Rules

Data level of Measured Phenomena

When measuring geographic phenomena in the field for the collected dataset, we commonly speak about the level of measurement. These out-coming data usually are divided into four levels of measurement:

  • Nominal data
  • Ordinal data
  • Numeric data
    • Interval data
    • Ratio data

The distinction of these data levels is relevant for the type of map presentation we wish to choose. Ordinal, interval, and ratio can be combined to create quantitative data.
In contrast, to these three data levels, nominal data only describes qualitative information. In the following paragraphs, we will point out the characteristics of each data level.

Thus, in this lesson, for which you need no prerequisites, you will learn the different levels of data measurement. In addition, you will also learn to prepare data for classification, as well as some basic classification rules.

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