data (vocab)

• Compress = to decrease the number of bits used to represent a piece of information
• Data compression = Involves encoding information using fewer bits than the original representation
• Image = A type of data used for graphics or pictures
• Lossless = A compression scheme in which every bit of the original data can be recovered from the compressed file
• Lossy = A compression scheme in which "useless" or less-than-totally-necessary information is thrown out in order to reduce the size of the data. The eliminated data is unrecoverable
• Metadata = Is data that describes other data. For example, a digital image my include metadata that describe the size of the image, number of colors, or resolution.
• Raw data = The original data as it was collected without any modification, compression, etc.
• Visualization = Images, diagrams, tables, etc. created from information extracted from a given data set, with the express intention of highlighting a data story.