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IDRISI Modules A - Z

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iALLOCATE
Analysis/Distance Operators
Performs spatial allocation using either DISTANCE or COST surfaces.
iARCIDRIS
File/Import-Export/Software-Specific Formats
Converts files to and from Arc/Info GENERATE/UNGEN format.
iAREA
Analysis/Database Query
Creates a new image by giving each output pixel the value of the area of the class to which the input pixel belonged. Output can also be produced as a table or an attribute values file in a range of measurement units.
iASSIGN
Analysis/Database Query
Data Entry
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.
iATLIDRIS
File/Import-Export/Software-Specific Formats
Converts ATLAS BNA files to IDRISI vector format.
iAUTOCORR
Analysis/Statistics
Computes Moran+s -I+ first lag autocorrelation statistic for an image, along with confidence tests. Non-rectangular regions can be analyzed by defining a binary mask.
iBATCH324
DOS version only
Converts groups of Version 3 data files to Version 4 format.
iBAYES
Analysis/Decision Support
evaluates Bayes' Theorem. Multiple evidence maps (such as that produced by PCLASS ) are permitted as long as they are conditionally independent. Prior probabilities may be input in map form (and thus, like the evidence maps, may vary continuously over space). The user is also able to specify the confidence in the decision rule, I. e., the belief that the evidence supportive of the hypothesis is truly reflected in the evidence at hand -- p(e|e'). BAYES is an extension to what is sometimes called a Bayesian Weight of Evidence approach.
iBBKIDRIS
File/Import/US Government Data Formats
Converts National Survey Blue Book format (*80* and *81* records) to IDRISI vector format.
iBILIDRIS
File/Import/General Conversion Tools
Converts generic band-interleaved by line images to IDRISI format.
iBIPIDRIS
File/Import/General Conversion Tools
Converts generic band-interleaved by pixel images to IDRISI format.
iBMPIDRIS
WINDOWS version only
File/Import-Export/Desktop Publishing Formats
BMPIDRIS converts bitmaps from graphics packages which support the .bmp format into IDRISI for Windows images and vice versa. BMPIDRIS should be used as a companion to WMFIDRIS for the conversion of vector images.
iCENTER
Analysis/Statistics
Computes mean center (weighted or not) of a point distribution and standard radius (the two-dimensional equivalent of a standard deviation).
iCLUSTER
Analysis/Image Processing
Performs unsupervised classification.
iCOLOR
DOS version only
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.(in WINDOWS version: DISPLAY LAUNCHER)
iCOLOR85
DOS version only
A special version of COLOR for the 8514/A graphics adaptor capable of displaying color composite images (256 color) at high resolution (1024 ´ 768) (in WINDOWS version: DISPLAY LAUNCHER)
iCOLSPACE
Analysis/Image Processing
Performs HLS/RGB color space transformations.
iCOMPOSIT
Analysis/Image Processing
Produces color composite images.
iCONCAT
Reformat
Concatenates multiple images to produce a larger image.
iCONFIG
DOS version only
A hardware configuration utility.
iCONTRACT
Reformat
Reduces image resolution by pixel thinning or aggregation.
iCONV3TO4
File/Import
Converts Version 3 data files to Version 4 format.
iCONVERT
Reformat
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.
iCOPY
WINDOWS version only
COPY provides the file management capability of copying IDRISI for Windows data files.
iCOST
Analysis/Distance Operators
Generates a distance/proximity surface where distance is measured as the least cost distance in moving over a friction surface.
iCRATIO
Analysis/Statistics
Computes the compactness ratio of polygons given corresponding area and perimeter images.
iCRLF
File/Import/General Conversion Tools
Adds or removes carriage return and line feed symbols.
iCROSSTAB
Analysis/Database Query
Analysis/Statistics
Analysis/Change-Time Series
Performs image crosstabulation and crosscorrelation.
iCTG
File/Import/US Government Data Formats
Imports USGS CTG (Composite Theme Grid) data files into IDRISI.
iDATABASE WORKSHOP
WINDOWS version only
Analysis/Database Query
DATABASE WORKSHOP provides IDRISI for Windows with an integrated relational database management system.
iDBIDRIS
DOS version only
Used to import dBASE files into IDRISI values files, and move IDRISI values files back into dBASE format.
iDECOMP
Analysis/Distance Operators
Decomposes a force vector (as a magnitude and direction image pair) into X and Y component images. Also takes X and Y component images and produces a force vector image pair.
iDELETE
WINDOWS version only
DELETE provides the file management capability of deleting IDRISI for Windows data files.
iDEMIDRIS
DEM in WINDOWS version
File/Import/US Government Data Formats
Reads USGS 1:24,000 and 1:250,000 Digital Elevation Models.
iDESCREF
DOS version only (in WINDOWS version integrated in DESCRIBE)
Describes the contents of a reference system parameter file.
iDESCRIBE Describes the contents of any image, vector or values files.
iDESTRIPE
Analysis/Image Processing
Removes band striping due to variable detector output.
iDISPERSE
Analysis/Distance Operators
DISPERSE is a companion to VARCOST that calculates dispersion distances. The procedure is essentially the same as that of VARCOST except that the emphasis is on forces acting to disperse a body (e. g., a point-source contaminant spill) and the time taken to disperse it to a specified distance. DISPERSE is released as an experimental module in Version 4.1 and all users are invited to comment upon their experiences with this procedure and provide suggestions for modifications.
iDISPLAY LAUNCHER
WINDOWS version only
DISPLAY LAUNCHER is the module that allows you to open a new display window.
iDISPLAY
DOS version only
A universal display routine using ASCII characters.
iDISTANCE
Analysis/Distance Operators
Calculates the distance/proximity of each pixel to the nearest of a set of target pixels.
iDLG
File/Import/US Government Data Formats
Scans and extracts features from USGS DLG (Digital Line Graph) files into IDRISI vector format.
iDOCUMENT Creates a documentation file for a new imported data file, or revises the documentation files of an existing data file.
iDUMP
File/Import/General Conversion Tools
Displays byte-level contents of any file.
iDXFIDRIS
File/Import-Export/Desktop Publishing Formats
Reads and writes DXF format vector files.
iEDIT
Analysis/Database Query
Data Entry
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.
iEDITSIG
Analysis/Image Processing
Edits signatures created with MAKESIG.
iENVIRON Changes the prevailing IDRISI operating environment.
iERDIDRIS
File/Import-Export/Software-Specific Formats
Converts files to and from ERDAS ".lan" and ".gis" format.
iERRMAT
Analysis/Decision Support
Produces an error matrix analysis of categorical map data compared to ground truth information. Tabulates error of omission and commission, marginal and total errors and selected confidence intervals. Per Category Kappa Index of Agreement figures are also provided. This module is a substatial revision and replacement for CONFUSE.
iEXPAND
Reformat
Increases image resolution by pixel duplication.
iEXTRACT
Analysis/Database Query
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.
iFILTER
Analysis/Context Operators
Analysis/Image Processing
Convolves (strictly correlates) an image with a digital filter. Mean, median, mode, edge-enhancement, low-pass, high-pass and user-defined filters are accommodated.
iFLIP
File/Import/General Conversion Tools
Reverses the byte order of 2-byte integer files.
iFUZZY
Analysis/Decision Support
Evaluates the fuzzy set membership values (possibilities) of data cells based on any of three membership functions: sigmoidal, j-shaped and linear. Monotonically increasing, monotonically decreasing, symmetric and asymmetric variants are supported. Other Fuzzy Set operations such as CON (concentration), DIL (dilation), AND and OR are covered by the standard modules TRANSFOR and OVERLAY .
iGRASSIDR
File/Import-Export/Software-Specific Formats
Converts raster files between GRASS and IDRISI.
iGROUP
Analysis/Context Operators
Classifies pixels according to contiguous groups.
i GSPIDRIS
WINDOWS version only
File/Import
GSPIDRIS extracts image data from SpotImage's SPOTView 1.5 and 4.1 format data volumes.
iHISTO
Analysis/Database Query
Analysis/Statistics
Produces histograms of image file values. In addition to the graphic output, numeric output includes proportional and cumulative frequen- cies along with simple statistics.
iHNTRLAND
Analysis/Context Operators
Determines the supply areas dominated by, or the hinterlands of, point demand centers.
iIDRISI
IDRISIW in WINDOWS version
The main IDRISI menu system.
iIMAGE
DOS version only
Produces a grey-scale image (up to 32 levels) using a half-tone procedure on dot-matrix, ink-jet and laser printers.
iINITIAL
Data Entry
Initializes a new image with a constant value.
iINTERCON
Data Entry/Surface Interpolation
Interpolates a surface from a set of contours by linear interpolation.
iINTERPOL
Data Entry/Surface Interpolation
Interpolates a surface from point data using either a weighted-distance or potential surface model.
iLANDSAT
DOS version only
Facilitates the downloading of LANDSAT CCT-X data.
iLINEGEN
Reformat
Generalizes vector lines by point selection, low-pass filtering or tolerance band selection.
iLINERAS
Reformat/Raster-Vector Conversion
Line-to-Raster conversion.
iLIST Lists the names and titles of all image, vector and values files.(all files in WINDOWS version)
iLISTPAL
DOS version only (in WINDOWS version integrated in DESCRIBE)
Lists color palette files in the active data directory.
iLISTREF
DOS version only (in WINDOWS version integrated in DESCRIBE)
Lists reference system parameter files.
iLISTSCR
DOS version only (in WINDOWS version integrated in DESCRIBE)
Lists vector script files used with PLOT.
iLISTSIG
DOS version only (in WINDOWS version integrated in DESCRIBE)
Lists supervised classification signature files.
iMAINT
DOS version only (in WINDOWS version separated into COPY , RENAME and DELETE )
A file maintenance utility.
iMAKESIG
Analysis/Image Processing
Creates signature files for each informational class for which you have created training sites.
iMAPIDRIS
File/Import-Export/Software-Specific Formats
Converts to and from Map Analysis Package files (both mainframe and micro versions).
iMAXLIKE
Analysis/Image Processing
A Maximum Likelihood classifier.
iMCE
Analysis/Decision Support
Computes a Multi-Criteria Avaluation by means of a weighted linear combination of factors, subsequently masked by a set of constraints. Factor uncertainty information is propagated to the result to compute the uncertainty in the suitabilities derived.
iMDCHOICE
Analysis/Decision Support
MDCHOICE is a multi-dimensional choice procedure that produces an output map indicating, for each cell, which of a series of input maps has the highest value. In cases where the input maps represent suitabilities for different objectives, the procedure provides one alternative to the multi-objective decision problem (although the MOLA procedure is preferable in most instances). In these cases, input maps should be standardized either with STANDARD or by means of the histogram equalization procedure in STRETCH .
iMINDIST
Analysis/Image Processing
A Minimum Distance to Means classifier.
iMOLA
Analysis/Decision Support
An iterative Multi-Objective Land Allocation routine. Input maps are ranked suitability maps such as would be produced by ranking (using RANK ) the output from a multi-criteria evaluation (using MCE ). The procedure uses a decision heuristic to resolve conflicts and is suitable for use with massive data sets.
iNDVICOMP
Analysis/Change-Time Series
Composites images (eg. NDVI) using either a maximum value procedure or a quadratic mean.
iNEWMOD
DOS version only
NEWMOD is a program shell to aid in the creation of new modules. Two versions are supplied: one in PASCAL and the other in BASIC.
iODYIDRIS
File/Import/Software-Specific Formats
Converts ODYSSEY vector files to IDRISI vector format.
iORTHO Produces a 3-D orthographic perspective plot of surface data with optional draping of a second color image.
iORTHO85
DOS version only
A special version of ORTHO for the 8514/A graphics adaptor capable of displaying color composite images at high resolution.
iOSUIDRIS
File/Import-Export/Software-Specific Formats
Converts to and from OSU Map files.
iOUTPOST
File/Export/Desktop Publishing Formats
OUTPOST creates PostScript output from IDRISI vector files for export to desktop publishing software. OUTPOST also allows for the creation of PostScript groups based on a sorting of identifiers or of values in an attribute values file.
iOVERLAY
Analysis/Database Query
Analysis/Mathematical Operators
Analysis/Change-Time Series
Undertakes pixel-wise addition, subtraction, multiplication, division and exponentiation of paired images. Maximum, minimum, -normalized ratio+ and -cover+ are also supported. On binary images, logical AND and OR operations are supported by means of the multiply and maximum operation. Other boolean operations are supported through various binary image overlay combinations.
iPAINT
DOS version only
A color output module for the HP Paintjet, Paintjet XL, XL300 and the Deskjet 500C, 550C and 1200C.
iPALETTE WORKSHOP
WINDOWS version only
PALETTE WORKSHOP facilitates the creation and modification of color palettes.
iPALIDRIS
File/Import-Export/Software-Specific Formats
Converts palette files between IDRISI, ERDAS, ILWIS and IAX.
iPARE
File/Import/General Conversion Tools
Converts generic files with headers to IDRISI format.
iPATHWAY
Analysis/Distance Operators
Finds the shortest path between one or more specified points and a destination specified as the lowest point on a cost surface.
iPATTERN
Analysis/Statistics
Analysis/Context Operators
Evaluates pattern measures of relative richness, diversity, dominance index, fragmentation index, NDC, CVN and BCM.
iPCA
Analysis/Image Processing
Principal Components Analysis (standardized and unstandardized).
iPCLASS
Analysis/Database Query
Analysis/Decision Support
Evaluates the probability that pixels exceed or are exceeded by a specified threshold using the stated RMS error or the data set and a normal probability distribution error model.
iPERIM
Analysis/Database Query
Creates a new image by giving each output pixel the value of the perimeter of the class to which the input pixel belongs. Output can also be produced as a table or an attribute values file in a range of measurement units.
iPIPED
Analysis/Image Processing
A Parallelepiped classifier.
iPLOT
DOS version only
Produces vector plots on screen, HPGL plotters and selected printers.
iPOINTRAS
Reformat/Raster-Vector Conversion
Point-to-Raster conversion.
iPOINTVEC
Reformat/Raster-Vector Conversion
Produces a vector point file from raster image (a companion to POLYVEC ).
iPOLYRAS
Reformat/Raster-Vector Conversion
Polygon-to-Raster conversion.
iPOLYVEC
Reformat/Raster-Vector Conversion
Raster-to-Polygon conversion.
iPROFILE
Analysis/Database Query
Analysis/Change-Time Series
Creates profiles over space or over time.
iPROJECT
Reformat
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.
iQUADRAT
Analysis/Statistics
Computes the density, variance and variance-mean ratio of quadrat cell counts.
iQUERY
Analysis/Database Query
Extracts pixels designated by an independent mask into a sequential file for subsequent statistical analysis.
iRADIANCE
Analysis/Image Processing
Converts raw values to calibrated radiances for LANDSAT images.
iRANDOM
Analysis/Statistics
Analysis/Decision Support
Creates random images according to either a rectilinear or normal distribution. In the case of a normal distribution, the mean and standard deviation to be used may be specified.
iRANK
Analysis/Decision Support
Rank orders the cells in a raster image. Ties may optionally be resolved by using the rank order of a second image. Both primary and secondary ranks may be in ascending or descending order. The procedure is used extensively in optimization problems such as with RECLASS for single objective decisions and MOLA for mulit-objective decisions.
iRASLNVEC Produces plottable vector output from images.
iRECLASS
Analysis/Database Query
Reclassifies pixels by equal intervals or user-defined schemes. RECLASS is commonly used as a database query routine by reclassifying images into Boolean maps of areas meeting the specified conditions.
iREGRESS
Analysis/Statistics
Analysis/Change-Time Series
Performs regression analysis on images or attribute values files.
iRENAME RENAME provides the file management capability of renaming IDRISI for Windows data files.
iRESAMPLE
Reformat
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.
iRESULTAN
Analysis/Distance Operators
Computes the resultant force vector (as a magnitude and direction image pair) from two input force vector image pairs.
iSAMPLE
Analysis/Statistics
Analysis/Decision Support
Creates systematic, random and stratified random point sampling schemes.
iSCALAR
Analysis/Mathematical Operators
Adds, subtracts, multiplies, divides and exponentiates pixels by a constant value.
iSCATTER
DOS version only; single program file, not in the menu!
Creates XY-scatterplots as images.
iSIGCOMP
Analysis/Image Processing
A signature comparison utility.
iSPDIST
Analysis/Distance Operators
A companion to the DISTANCE module, SPDIST calculates spherical distances on the surface of the earth from designated features using spherical trigonometry.
i SRFIDRIS
File/Import-Export/Software-Specific Formats
SRFIDRIS will import Surfer GRID raster files into IDRISI for Windows image format. It will also export IDRISI vector point files into the Surfer DAT format.
iSSTIDRIS
File/Import
Converts raster images entered with a spreadsheet to IDRISI. Can be used to read any ASCII image format with CR/LF characters at the end of each row.
iSTANDARD
Analysis/Statistics
Analysis/Decision Support
Converts an image to standard scores.
iSTRETCH
Analysis/Decision Support
Analysis/Image Processing
Produces linear, linear with saturation and histogram equalization contrast stretches in preparation for image display.
iSUBSET
DOS version only (in WINDOWS version integrated in WINDOW
Windows sub-images from groups of images.
iSURFACE
Analysis/Context Operators
Produces slope gradient and aspect images from a surface. Can also be used to create analytical hillshading.
iSYMBOL WORKSHOP
WINDOWS version only
SYMBOL WORKSHOP is used for the creation and editing of IDRISI symbol files.
iTHERMAL
Analysis/Image Processing
Converts LANDSAT TM Band 6 raw data to blackbody temperatures.
iTHIESSEN
Analysis/Distance Operators
Data Entry/Surface Interpolation
Produces Thiessen polygons (a Voronoi Tesselation) about a set of irregularly distributed points.
iTIFIDRIS
File/Import-Export/Desktop Publishing Formats
Reads and writes TIFF format files.
iTOSCA An independent universal digitizing module distributed with IDRISI.
iTRANSFOR
Analysis/Mathematical Operators
Transforms the attributes of images such as log transformation, using any of 14 operations.
iTRANSPOS
Reformat
Image transposition by row or column reversal, or by rotation.
iTREND
Analysis/Statistics
Data Entry/Surface Interpolation
Calculates the best fit linear, quadratic or cubic trend surface to a set of irregular cell control points by least-squares procedures. Produces new images of the trend surfaces in addition to surface statistics.
iTSA
Analysis/Change-Time Series
TSA is a spatial time series analysis procedure based on Standardized Principal Components. Up to 84 input images can be analyzed as a group with the production of an equal number of resulting components. Loadings graph are output either as IDRISI profiles or as a DIF-format data file that can be read by virtually all spreadsheet software systems.
iUPDATE
Data Entry
Keyboard entry/update of image data.
iUTMREF
Data Entry
is used to facilitate the creation of reference system parameter files based on the Universal Transverse Mercator system, for use with PROJECT
iVAR2FIX
File/Import/General Conversion Tools
Converts variable length ASCII files to fixed length.
iVARCOST
Analysis/Distance Operators
Computes an anisotropic cost surface. This module is the equivalent of COST (specifically the COSTPUSH algorithm) except that it recognizes that frictions may have different strengths in different directions. Frictions are entered as force vectors described by a pair of images - a magnitude image and a direction image. VARCOST also allows the specification of an isotropic friction image for omni-directional elements.
iVGACOMP
DOS version only
Produces color composite images for standard VGA systems.
iVIEW Allows direct examination of the data values in any portion of an image. Output precision is user-specified.
iVIEWSHED
Analysis/Context Operators
Creates an image of all points visible from one or more viewpoints over a given surface.
iWATRSHED
Analysis/Context Operators
Determines the watersheds of one or more specified locations.
iWEIGHT
Analysis/Decision Support
Computes a best-fit set of weights by calculation of the principal eigenvector of a pairwise reciprocal comparison matrix in which each factor in a multi-criteria evaluation is compared to every other factor. Information on consensus and procedures for resolving lack of consensus are provided.
iWINDOW
Reformat
Extracts a rectangular sub-image.(in WINDOWS version direct batch processing possible)
iWMFIDRIS
WINDOWS version only
File/Export/Desktop Publishing Formats
WMFIDRIS is an export module that creates Windows Meta Files from IDRISI for Windows vector files as a means of facilitating the movement of IDRISI for Windows data to graphics packages (such as CorelDRAW! and Adobe Illustrator)
iXYZIDRIS
File/Import
XYZIDRIS converts data in X, Y and Z format (e.g., spreadsheet data) to IDRISI for Windows vector point files.


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