IDRISI Selva is an integrated GIS and Image Processing software solution providing nearly 300 modules for the analysis and display of digital spatial information.

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4
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4answers
1k views

How to sample raster datasets at ALL points?

I know it is possible to use tools like ArcGis's 'extract sample' tool to extract values at a given number of points. I would like to sample every pixel in a raster, and drill down through all other ...
4
votes
3answers
2k views

what is the syntax for a Maximum operator in ArcGIS

The requested maximum operator is a function that produces a new raster with the highest values on a cell-by-cell basis from an array of coincident input rasters. It is the kind of Maximum Support ...
4
votes
1answer
260 views

How do I use a DHM in tiff format for distance and slope measurements?

I am a student and I have to work out a project about soil loss on a plot. I need basic measurements of this plot such as length, width, area and slope for my erosion calculations. I have got my ...
3
votes
2answers
2k views

IDRISI .vec file translator to ESRI shapefile format?

I've recently got hold of almost 20 years old IDRISI .vec files which I'd like to convert to ESRI shapefile. I've been struggling to find any translator for this file format so far. Does anybody know ...
3
votes
2answers
770 views

How to extract cell values from a raster file with Idrisi Taiga?

I need to convert raster cells into points. I use Idrisi and I need to generate a table containing xy (coordinates) and z (cell value).
2
votes
1answer
437 views

Fuzzy maps with QGIS/GRASSGIS

How to do fuzzy maps (FUZZY module in IDRISI) with QGIS/GRASSGIS?
2
votes
1answer
276 views

How to open a .k format (I think it is made with IDRISI product) with open source software

I just received a .k file which I know it was made with a IDRISI software (I do not know which). I searched the web and I did not find many information on this format apart for a very essential page ...
2
votes
0answers
57 views

Size of an object in raster image based on DPI resolution and number of pixels

I'm trying to estimate the size of an object in a raster image, with known DPI resolution. To evaluate the validity of this method, I do as follows: 1) I'm drawing a 0,02 in × 0,02 in black square ...
2
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0answers
64 views

Classification and measurement of feature basing on scan [closed]

It`s not entirely a GIS question, however maybe somebody can help. I need to automatically classify and then measure area of certain elements on image. That image is a scan of a thin wood slice and ...
1
vote
2answers
279 views

How to create an image of mean values from multiple NDVI images?

I have downloaded MODIS NDVI images of 12 months. I would like to create just 1 image with the mean values. I tried using IDRISI's 'NDVI compositing utility', but I get an error. Is there a way to do ...
1
vote
1answer
474 views

How to convert jpgs to RST for IDRISI Selva Image Processing

I would like to create a mosaic data set in IDRSI Selva however, my images are jpg. Is there a way to convert these within IDRISI or otherwise? Thanks.
1
vote
1answer
26 views

What does “cell” stands for in IDRISI?

Is "cell" in IDRISI (for ex. in area calculation) the same thing as pixel? Or what else it is?
1
vote
1answer
2k views

Converting ERDAS (*.img) file into headerless binary file?

I am having trouble converting an ERDAS (*.img) file into a headerless binary file. I want to use those images in the TIMESAT program. I'm trying to do this in IDRISI 32 but there is an error ...
1
vote
1answer
37 views

How to normalize Landcover criterian Map to 0-255 scale in Weighted Linear Combination?

I am interested to normalize Landcover raster image having 6 classess using fuzzy membership function (sigmoidal monotonically increasing) in Weighed Linear Combination (WLC) in the backdrop of MCE ...
1
vote
0answers
28 views

Probabilities matrices and cellular automata in IDRISI

I apologize for asking about such elementary things, but I am utterly new to IDRISI yet am now having to learn how to perform certain tasks with it on very short notice. Am I right that, when Markov ...
1
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0answers
193 views

converting coordinate/reference system on IDRISI Selva

i had converted my shp.coordinate/reference system from plane to UTM 48S in IDRISI Selva by change it directly at its layer properties. And after, theres message said that the changing is only for ...
0
votes
1answer
330 views

grouping village points based on distance and population size

I want to group a number of villages based on their distance to each other and total cumulative population size? any suggestions? Edit: To be clear, my question is as follows: 1, I have a vector ...
0
votes
0answers
15 views

Preparing success rate diagram in IDRISI?

I am looking to produce 'Success Rate Curve' of my Landslide Susceptibility Zonation Map' earlier prepared in IDRISI Selva 17.0 edition. Is there any way to produce the following diagram in the ...
0
votes
0answers
203 views

Converting GeoTIFF to Idrisi raster (RST) in QGIS?

I need to convert a GeoTIFF file to Idrisi raster (RST) in QGIS. I've tried the following: Raster->Conversion->Translate It does not work and I do not know what to do? Annex GTIFF