CORE MODULES

The CORE modules provide basic facilities for the manipulation of raster images

Project Management

IDRISI

The main IDRISI menu system.

ENVIRON

Changes the prevailing IDRISI operating environment.

LIST

Lists the names and titles of all image, vector and values files.

LISTPAL

Lists color palette files in the active data directory.

LISTSIG

Lists supervised classification signature files.

LISTSCR

Lists vector script files used with PLOT.

LISTREF

Lists reference system parameter files.

DESCRIBE

Describes the contents of any image, vector or values files.

DESCREF

Describes the contents of a reference system parameter file.

DOCUMENT

Creates a documentation file for a new imported data file, or revises the documentation files of an existing data file.

CONVERT

Converts between all of the image storage formats supported by IDRISI. Files may be converted to any combination of the byte, integer and real (floating point) data types and the ASCII, binary and packed (run-length encoded) file structures.

MAINT

A file maintenance utility.

CONFIG

A hardware configuration utility.

CONV3TO4

Converts Version 3 data files to Version 4 format.

BATCH324

Converts groups of Version 3 data files to Version 4 format.

Back to index!


Display Modules

COLOR

Produces color output of raster images with integrated vector display on EGA, VGA and SuperVGA graphics systems. COLOR also provides interactive inquiry, on-screen digitizing, interactive zoom, vector file overlay, interactive palette selection and adjustment and interactive legend editing. With SuperVGA graphics adaptors, high resolution displays (up to 1024 ´ 768) of color composite images (256 color) can be produced.

COLOR85

A special version of COLOR for the 8514/A graphics adaptor capable of displaying color composite images (256 color) at high resolution (1024 ´ 768).

ORTHO

Produces a 3-D orthographic perspective plot of surface data with optional draping of a second color image.

ORTHO85

A special version of ORTHO for the 8514/A graphics adaptor capable of displaying color composite images at high resolution.

IMAGE

Produces a grey-scale image (up to 32 levels) using a half-tone procedure on dot-matrix, ink-jet and laser printers.

PLOT

Produces vector plots on screen, HPGL plotters and selected printers.

PAINT

A color output module for the HP Paintjet, Paintjet XL, XL300 and the Deskjet 500C, 550C and 1200C.

DISPLAY

A universal display routine using ASCII characters.

VIEW

Allows direct examination of the data values in any portion of an image. Output precision is user-specified.

HISTO

Produces histograms of image file values. In addition to the graphic output, numeric output includes proportional and cumulative frequen- cies along with simple statistics.

STRETCH

Produces linear, linear with saturation and histogram equalization contrast stretches in preparation for image display.

Back to index!


Data Entry

TOSCA

An independent universal digitizing module distributed with IDRISI.

POINTRAS

Point-to-Raster conversion.

LINERAS

Line-to-Raster conversion.

POLYRAS

Polygon-to-Raster conversion.

INITIAL

Initializes a new image with a constant value.

UPDATE

Keyboard entry/update of image data.

EDIT

A simple ASCII text editor for use with creating a variety of IDRISI data files. With values files, EDIT creates and maintains proper documenta- tion files automatically.

INTERPOL

Interpolates a surface from point data using either a weighted-distance or potential surface model.

INTERCON

Interpolates a surface from a set of contours by linear interpolation.

Back to index!


Attribute Data Management

ASSIGN

Creates an image from an attribute values file by assigning the data values contained in the attribute values file to the cells belonging to defined regions. ASSIGN can also be used to reclassify integer images.

EXTRACT

Creates an attribute values file from an image by extracting a summary of data values found within defined regions. The summary (minimum, maximum, range, total, mean, or standard deviation) may also be output as a table.

DBIDRIS

Used to import dBASE files into IDRISI values files, and move IDRISI values files back into dBASE format.

see also EDIT , UPDATE , RECLASS and COLSPACE .

Back to index!


Spatial Data Management

PROJECT

Undertakes conversions between reference systems for both vector and raster files. With raster images, a resampling is undertaken using either a nearest-neighbor or bilinear interpolation. Supported projections include the Mercator, Transverse Mercator, Lambert Conformal Conic and Plate Carree. By using reference system parameter files, a limitless number of reference system conversions can be undertaken. Full forward and backward transformations are accommodated using ellipsoidal formulas. PROJECT also incorporates the US National Geodetic Survey's NADCON procedure for converting between NAD27 AND NAD83 and the Molodensky transform equations for all other datums. Over 200 reference system parameter files are supplied with the module, including all US State Plane (SPC) systems for NAD27 and NAD83 and a complete set of UTM zones based on WGS84 for the northern and southern hemispheres. In addition, users can construct reference system parameter files for any system based on a supported projection.

RESAMPLE

Determines the data values for a rectangular grid by interpolation of the values in a different (and possibly warped) grid. Linear, quadratic and cubic mappings between the grids are provided, along with nearest-neighbor and bi-linear interpolations. Vector files may also be trans- formed with this Òrubber sheetÓ procedure.

EXPAND

Increases image resolution by pixel duplication.

CONTRACT

Reduces image resolution by pixel thinning or aggregation.

TRANSPOS

Image transposition by row or column reversal, or by rotation.

CONCAT

Concatenates multiple images to produce a larger image.

WINDOW

Extracts a rectangular sub-image.

SUBSET

Windows sub-images from groups of images.

POINTVEC

Produces a vector point file from raster image (a companion to POLYVEC ).

POLYVEC

Raster-to-Polygon conversion.

LINEGEN

Generalizes vector lines by point selection, low-pass filtering or tolerance band selection.

RASLNVEC

Produces plottable vector output from images.

Back to index!


idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis idrisi resource center idrisi gis idrisi gis