Cartography and Data Representation

Flashcards based on Cartography and Data Representation lecture notes.

measurements - are qualitative and categorical. Eg. hair colour, place of birth.

Nominal

measurements - are meaningful in terms of rank order in that each category has a unique position relative to the other categories. For instance, social classes such as working, middle, and upper.

Ordinal

measurements are meaningful in terms of ordering and distance between categories because the distance between categories is in fixed and equal units. Eg. Temperature

Interval

measurement has all the properties of interval measurement, with the additional property that the zero point is inherently defined by the measurement scheme. Eg. distance

Ratio

__ equal size ranges

Equal Interval

__ equal number of values (data records) per class

Quantiles

__ uses natural groupings (Jenks method)

Natural Breaks

__ based on a distribution (distance) from the mean

Standard Deviation

Maps are about ___ therefore use the symbols that people associate with different themes – cartographic convention.

communication

__ - French Geo-cartographer, in his book "Semiology of graphics" (1983) provided a logical structure for graphic variables

Bertin, J

Colour comes from ___ __

Electromagnetic Energy

HVC - Hue Value Chroma. Hue or Colour, __, Luminosity Chroma or __

Lightness, Saturation

RGB- Red Green Blue - __ primaries.

additive

CMY - Cyan Magenta Yellow - __ primaries

subtractive

Red and green light will combine to produce __, however red and green ink will not combine to produce yellow, instead a chocolate brown will result.

yellow

Cyan, Magenta, and Yellow are more suited for specifying light and are therefore used for making inks. They are called the primary colours.

reflective, subtractive

Red, green, and blue are more suited for specifying light and are therefore used for this purpose, eg. a cathode ray tube in a TV or computer monitor. They are called the primary colours.

direct, additive