Different Types of Data

Description

Mind Map on Different Types of Data, created by ajessop on 10/14/2013.
ajessop
Mind Map by ajessop, updated more than 1 year ago
ajessop
Created by ajessop over 11 years ago
24
0

Resource summary

Different Types of Data
  1. Data: Raw facts and figures or a set of values.
    1. Data can arise is different formats for example numbers, text, still images, moving images or sound.
      1. Images: Images can be stored as bitmap or vector graphics.
        1. Numbers: Coding systems exist for different types of numbers: integers (whole numbers); real numbers (numbers with a fractional part); currency (pounds and pence); Boolean (0 or 1).
          1. Moving Images: Animations consist of images (or frames) stored together and displayed one after the other. The more frames and the smaller the change between frames, the more realistic is the effect of the animation. An animation can take up a lot of storage space.
            1. Sound: Sound has to be sampled at regular intervals. The sampling rate is the number of times that the wave is sampled for a given time period. Data compression techniques are used to reduce the amount of storage space required.
            2. Direct data capture is the collection of data for a particular purpose.
              1. Example: reading journey details from the magnetic stripe on a train ticket when a passenger enters the platform to check that the ticket is valid
              2. Indirect data capture is the collection of data as a by-product from another purpose.
                1. Example: using the collected data on journeys to calculate statistics on train use
                2. Whatever type of data being input, computers store and process data using binary numbers. A single unit in binary is called a bit which stands for binary digit.
                  1. 1 byte = 8 bits
                    1. Computer memory is measured in Bytes. One byte is made up of eight bits. One byte can store one character.
                    Show full summary Hide full summary

                    Similar

                    Biology AQA 3.1.5 The Biological basis of Heart Disease
                    evie.daines
                    Plant and animal cells
                    charlotteireland
                    IB Economics SL: Microeconomics
                    Han Zhang
                    GCSE Biology AQA
                    isabellabeaumont
                    The Biological basis of Heart Disease
                    Andrea Leyden
                    HISTOGRAMS
                    Elliot O'Leary
                    A2 Organic Chemistry - Reactions
                    yannycollins
                    Physics P3 Fashcards
                    Holly Bamford
                    Psychopathology
                    Laura Louise
                    Creating Mind Maps with GoConqr
                    Sarah Egan
                    1PR101 2.test - Část 5.
                    Nikola Truong