GIS

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Author:
jess3c
ID:
17071
Filename:
GIS
Updated:
2010-05-01 15:13:08
Tags:
Vocab
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Description:
Chapter 7
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  1. Affine transformation
    A geometric transformation, skew and differential scaling on a rectangular object, while preserving line parallelism.
  2. Bilinear interpolation
    A resampling method that uses the distance-weighted average of the four nearest pixel values to estimate a new pixel values.
  3. Cubic convolution
    A resampling method that uses the distance-weighted average of the 16 nearest pixel values to estimate a new pixel value.
  4. Geometric transformation
    The process of converting a map or an image from one coordinate system to another by using a set of control points and transformation equations.
  5. Ground control points (GCPs)
    Points used as control points for an image-to-map transformation.
  6. Image-to-map transformation
    One type of geometric transformation that converts the rows and columns of a sattellite image into real-world coordinates.
  7. Map-to-map transformation
    One type of geometric transformation that converts a newly digitized map into real-world coordinates.
  8. Nearest neighbor
    A resampling method that uses the nearest pixel value to estimate a new pixel value.
  9. Pyramiding
    A technique that builds different pyramid levels for displaying large raster data sets a different resolutions.
  10. Resampling
    A process of filling each pixel of a newly transformed image with a value or derived value from the original image.
  11. Root mean square (RMS) error
    A measure of the deviation between the actual location and the estimated location of the control points in geometric transformation.

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