GIS
Card Set Information
Author:
jess3c
ID:
17071
Filename:
GIS
Updated:
2010-05-01 15:13:08
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Vocab
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Description:
Chapter 7
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Affine transformation
A geometric transformation, skew and differential scaling on a rectangular object, while preserving line parallelism.
Bilinear interpolation
A resampling method that uses the distance-weighted average of the four nearest pixel values to estimate a new pixel values.
Cubic convolution
A resampling method that uses the distance-weighted average of the 16 nearest pixel values to estimate a new pixel value.
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.
Ground control points (GCPs)
Points used as control points for an image-to-map transformation.
Image-to-map transformation
One type of geometric transformation that converts the rows and columns of a sattellite image into real-world coordinates.
Map-to-map transformation
One type of geometric transformation that converts a newly digitized map into real-world coordinates.
Nearest neighbor
A resampling method that uses the nearest pixel value to estimate a new pixel value.
Pyramiding
A technique that builds different pyramid levels for displaying large raster data sets a different resolutions.
Resampling
A process of filling each pixel of a newly transformed image with a value or derived value from the original image.
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.