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Questions tagged [envi]

Use this tag for programming-related questions about the GIS app ENVI and its API.

ENVI is an application for processing and analyzing geospatial imagery, released by Harris Geospatial.

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39 questions
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Converting data into ENVI format

I have data acquisition from Hyperspectral image scanner and now my task is to convert the image(.png and .jpg format) in to different form, let's say ENVi header file or Open cv or MATLAB. IS Envi format is similar to file folder which contains…
Jr.Datascience Aspirant
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IDL equivalent of python's dir()

In python, dir(X) will list the attributes and methods of object X. Is there something similar for an IDL object?
user3433489
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Conversion of ENVI binary files to tiff

I have a challenge in converting a batch of ENVI binary files(BSQ) temperature data(gotten from SAFARI 2000 AVHRR-Derived LST) to geotiff files. How can i read them and convert it to geotiff? An example of one such file is…
grace cherotich
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Why does R raster::writeRaster() generate a pic which can't be shown in Win10?

I read my hyperspectral (.raw) file and combine three bands to "gai_out_r" Then I output as following: writeRaster(gai_out_r,filepath,format="GTiff") finally I got gai_out_r.tif But, why Win10 can't display this small tif as the pic that I output…
L. Holmes
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How do I convert a .nc file with multiple layers into a file readible in ENVI in R

I have downloaded data from https://oceancolor.gsfc.nasa.gov/ that is formatted into a .nc file but I want to be able to use it in ENVI. I have done x <- stack("C:\\Users\\blopezbarreto\\Downloads\\A2018012210500.L2_LAC_IOP.nc") This only has it…
brittbarreto
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IDL compare 1000 tifs from Meteosat and create a new one

I need to compare the bands 2,3,6 and 9 of the Meteosat-8 all 15min. I already did the calculation for the brightness temperature and I managed to read all Tifs into IDL. Now i did some Ratios. Like B6-B4, B9-3... Now I want to create a new Tif,…
bumi
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4 answers

IDL variable name based on input file name

I'm trying to load multiple images and want to automate the variable naming to make the variable name = the file input name. For example: image1=read_binary('image1.img',DATA_START=0,DATA_TYPE=1,DATA_DIMS=[450, 750,3], ENDIAN=native) Just…
wilfred202
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the solution of equation with IDL

how do i get the solution of equation with newton method in IDL，my procedure will provide the various（ tile in here）,but the newton method id IDL just recive the initially solution of equation. please help me for my thesis for remote sensing image…
Kevin Lee
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Python - list of list of single items for spectral python

I'm new around here but I've been using answers for a long time and they're always helpful, but I'm not finding this one. I'm working with spectral python for some data manipulation, and I'm vastly changing my input data. In fact, I'm creating new…
M Crockett
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ArcMap conditional statement raster attribute?

I'm having difficulty with the syntax to do the following: I have four raster products from various classifications. Each has one or two classes representing the units I am interested in, so I want to use raster calculator to make a new raster where…
ithomp
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How to use envi setup head function?

I don't understand the envi_setup_head. Could anyone help me write it in IDL code format? I have maps that were produced in IDL and I need to process them in ENVI. I don't know how to save the images in a folder and be able open them in ENVI. Does…
Chyrel
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Why IDL have different value in same expression?

I'm doing some image processing with IDL, and it required a high-precision. But when I debug my colleague's program, I find some thing strange: IDL> lat,y_res 45.749001 0.00026999999 IDL> lat - findgen(10)*y_res + y_res * 0.5 +…
Nico
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Unable to write pixel block in band sequential mode

I'm working with an ENVI image file (.hdr labbeled) with a interleave of the type bsq (band sequential). I'm trying to do a principal component transformation of an image about 350MB large. In order to do that I had to proccess it separately in…
lfmc
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Python IDL bridges: Envi functions

my aim is to use a script written in IDL, into python: IDL code: PRO PS_GS ; Start the application e = ENVI() ;Generate the roi from a vector file ; Open a vector file file_vec = Filepath('Sic_Trapani.shp', ROOT_DIR = 'E:\mydirectory\') vettore =…
Lorenzo NAIS
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insert a variable after a string for naming an output file in a loop? ENVI/IDL

I am a total beginner with ENVI/IDL, how can I insert a variable into a string for naming an output file in a loop? I am trying to loop a support vector machines classifier with different values and combinations of the parameters i.e. gamma and…
Andrea Massetti
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