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20 Cards in this Set
- Front
- Back
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Bi-level scanned file
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A scanned file containing values of 1 or 0.
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Cell-by-Cell Encoding
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A raster data structure that stores cell values in a matrix by row and column.
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Data Compression
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Reduction of data volumes, especially for raster data.
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Digital Elevation Model (DEM)
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A digital model with an array of uniformly spaced elevation data in raster format.
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Digital Orthophoto Quad (DOQ)
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A digitized image prepared from an aerial photograph or other remotely sensed data, in which the displacement caused by camera tilt and terrain relief has been removed.
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Digital Raster Graphic (DRG)
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A scanned image of a USGS topographic map.
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ESRI grid
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A proprietary ESRI format for raster data.
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Floating Point Raster
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A raster that contains cells of continuous values.
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Georeferenced raster
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A raster that has been processed to align with a projected coordinate system.
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Integer Raster
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A raster that contains cell values of integers.
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Landsat
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An orbiting satellite that provides repeat images of the Earth's surface.
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Lossless compression
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One type of data compression that allows the original image to be precisely reconstructed.
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Lossy Compression
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One type of data compression that can achieve high-compression ratios but cannot reconstruct fully the original image.
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Quad Tree
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A raster data structure that divides a raster into a hierarchy of quadrants.
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Raster Data Model
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A data model that uses rows, columns, and cells to construct spatial features.
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Rasterization
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Conversion of vector data to raster data.
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Run length encoding (RLF)
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A raster data structure that records the cell values by row and by group. A run-length encoded file is also called a run-length compressed (RLC file).
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SPOT
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A French satellite that provides repeat images of the Earth's surface.
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Vectorization
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Conversion of raster data to vector data.
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Wavelet transform
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A new image compression technique that treats an image as a wave and progressively decomposes the wave into simpler wavelets.
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