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Using Geomatica Software - Fernerkundung Jena - Friedrich ...

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CONTOUR<br />

ContactX<br />

DIEST<br />

IP<br />

FCONT<br />

FVDIF<br />

IDINT<br />

NNINT<br />

RBFINT<br />

TEX<br />

Contour Generation from Raster Image Creates a vector segment<br />

containing contour lines from a raster image, such as an elevation<br />

(DEM) image, given a specified contour interval. The contour value<br />

for each line is saved in either the Z-coordinate of all vertices or in a<br />

separate attribute field.<br />

Contact Extension Creates an output vector segment. The vector<br />

egment consists of line segments which trace the intersection of a<br />

plane with the surface of a digital elevation model (DEM). The plane<br />

is defined from the dip and strike angles of the input shape, which<br />

are set by the DIP program. Alternatively, they may be set as<br />

parameters in this program.<br />

Estimation Procedure for Spatial Data Integration Combines multiple<br />

layers of spatial data to derive a favourability model for predicting a<br />

geological event (mineral potential, landslide, etc.). Available<br />

algorithms include probability estimation, certainty factor<br />

estimation, and fuzzy membership estimation. DIGRP must be run<br />

before DIEST<br />

Dip and Strike Calculation Calculates angles of dip and strike for a<br />

set of 3 or more points.<br />

Upward/Downward Continuation Filter Compute upward/downward<br />

continuation of a potential field. The filter is applied in frequency<br />

domain. 2D Fourier transform is first applied to the image. After<br />

filtering, the image is transformed back to the spatial domain.<br />

Vertical Differentiation Filter Compute the Nth order vertical<br />

differentiation of a potential field. The filter is applied in frequency<br />

domain after transforming the image using 2D FFT.<br />

Inverse Distance Interpolation Generates a raster image by<br />

interpolating image values between specified pixel locations using<br />

the Simple Inverse Distance or Weighted Inverse Distance<br />

algorithm.<br />

Natural Neighbour Interpolation Generates a raster image by<br />

interpolating image values between specified pixel locations using<br />

natural neighbour interpolation. This program uses the NNGRIDR<br />

code developed by Dr. D.F. Watson at the University of Western<br />

Australia.<br />

Radial Basis Function Interpolation Generates a raster image by<br />

interpolating image values between specified pixel locations using a<br />

Radial Basis Interpolation Algorithm. This program implements the<br />

Multi-Quadric and the Thin Plate Spline schemes.<br />

Texture Analysis Calculates a set of texture measures for all pixels<br />

in an input image. The measurements are based on second-order<br />

statistics computed from the grey level co-occurrence matrices.<br />

Either texture measures for a specific direction or directional<br />

invariant measures can be computed. The texture measures may be<br />

used as input features to classification algorithms.<br />

Change Radiometric Resolution:<br />

SCALE<br />

Image Grey Level Scaling and Quantization, perrforms a linear or<br />

nonlinear mapping of image grey levels to a desired output range.<br />

This program is typically used to scale data from "high" resolution<br />

(32 and 16-bit) channels to "low" resolution (16 and 8-bit)<br />

channels.

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