I. The relationship between data and information is:

1. Data is a form of expression of information, data represents information through information codes that can be written. Information has many forms of expression, it is expressed through gestures, eyes, voice or graphics, but data is the best form of expression of information.

2. Because data can be written, it can be recorded, stored and processed to extract deeper information. However, data is not the same as information, data is only one of the ways of expressing information. Correct data can express information, while false, wrong data expressed by the fallacy, not information.

Two, data

Data is numerical values, that is, the results we get through observation, experiment or calculation. There are many kinds of data, the simplest being numbers. Data can also be words, images, sounds, etc. Data can be used for scientific research, design, checking, etc.

Third, information

Information, refers to audio, messages, objects transmitted and processed by communication systems, and refers broadly to everything that is transmitted by human society. Human beings are able to recognize and transform the world by acquiring and identifying different information about nature and society in order to distinguish between different things. In all communication and control systems, information is a form of universal connection.

Expanded:

Data Classification

1, according to the nature of the classification

①localization, such as a variety of coordinate data;

②qualitative, such as data indicating the attributes of the thing (settlement, rivers, roads, etc.);

③quantitative, reflecting the quantitative characteristics of the thing data, such as the length, area, volume and other geometric quantities, or weight, volume, etc.;

③Quantitative, reflecting the quantity of things characterized by data, such as length, area, volume and other geometric quantities. volume and other geometric quantities or weight, speed and other physical quantities;

④Timed, reflecting the time characteristics of things data, such as year, month, day, hour, minute, second, etc..

2, according to the form of expression is divided into

① digital data, such as a variety of statistical or measurement data. Digital data in a certain interval is a discrete value? [3]?

② analog data, consisting of continuous functions, is a continuous change in a certain interval of physical quantities, and can be divided into graphical data (such as points, lines, surfaces), symbolic data, textual data and image data, such as the size of the sound and the change in temperature.

3, according to the recording method is divided into

maps, tables, images, magnetic tape, paper tape. According to the digitization method is divided into vector data, grid data and so on. In the geographic information system, the choice of data, type, quantity, collection methods, level of detail, credibility, etc., depending on the system application objectives, functions, structure and data processing, management and analysis requirements.

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