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USGS CMG "Digital Data" Definition

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This provides the digital data definition Typing

  • Digital data information occurs in the CMG InfoBank with these attributes:
    • digital data -- Naturally occuring features or events are sources of streams of analog information. To take a "snapshot" of a feature or event for study and for sharing, scientists use various sensors. These discrete sensor measurements form a digital recording of this analog feature or event. Increasing sampling rate and sampling precision of the recording paints a more detailed and acurate picture of the original analog source. Digital data in InfoBank are the plain text recordings.
    • plain text -- Refers to the recorded textual data in ASCII format. Plain text is the most portable format because it is supported by nearly every application on every machine. It is quite limited, however, because it cannot contain any formatting commands.
    • ascii -- Acronym for the American Standard Code for Information Interchange. Pronounced ask-ee, ASCII is a code for representing English characters as numbers, with each letter assigned a number from 0 to 127. For example, the ASCII code for uppercase M is 77. Most computers use ASCII codes to represent text, which makes it possible to transfer data from one computer to another. Text files stored in ASCII format are sometimes called ASCII files. Text editors and word processors are usually capable of storing data in ASCII format, although ASCII format is not always the default storage format. Most data files, particularly if they contain numeric data, are not stored in ASCII format. Executable programs are never stored in ASCII format.

"Errors using inadequate data are much less than those using no data at all." -- Charles Babbage

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Page Last Modified: Mon Nov 4 03:37:34 PST 2013  (chd)