|
|
|
|
|
|
0 Replies and 1891 Views
Correlation between various bands of remote sensing data 1891 0
Started by Deleted User
Hi,
I wanted to find the correlation between various bands in a multi band satellite data. (number of bands is 224)
I know that there exists CORRELATE command which basically calculates between two dimensional data.
Here, i consider the entire value of band1 as one value and another band say band2 of the same image as another value, and i need to find the correlation value between them
The image that i use here is of the format HDF. Could i convert it to another file format such...
|
|
|
|
0 |
1891 |
02 Aug 2010 09:24 AM |
|
1 Replies and 1027 Views
Large Volume Geotiff Visualization 1027 1
Started by Deleted User
Hi all,
I have Geotiff data for both DEM and Images (for texture) which are large volume files (>500MB each). I am trying to write an IDL program able to deal with such large volume data. Basically, I load the data with READ_TIFF() and use a Graphic Object ("IDLgrModel","IDLgrSurface",...) for the 3D visualization.Unfortunately, I often get Memory error, and then if the data are displayed, "flying over" is just too slow. I have a pretty decent PC (DELL P...
|
|
|
|
1 |
1027 |
30 Jul 2010 01:30 PM |
|
0 Replies and 1138 Views
ROIs pixel values 1138 0
Started by Deleted User
I am doing some image processing (Remote Sensing) work in IDL. My image has four bands (blue, green, red, and NIR). I am trying to define regions of interest (ROIs) within the image and get the values of the pixels within the ROI. By values, I mean the reflectance values of the four bands for every pixels contained within my defined ROIs. Thanks for your time and your help.
|
|
|
|
0 |
1138 |
29 Jul 2010 04:49 PM |
|
2 Replies and 1211 Views
Data Structure Concatenation 1211 2
Started by Deleted User
Hello all.
Sorry if this is going to be long. I know having to debug other peoples scripts, I prefer a good concise explanation to figure things out! And I added a copy of some of the code that is giving me errors. It's just a lot of fluff you need not worry about.
I have been using IDL for a few years now, but my new job has forced me to start taking my more casual use of this language to a new degree. As such, I have found myself a bit baffled with how I can concatenate structures in I...
|
|
|
|
2 |
1211 |
28 Jul 2010 12:43 PM |
|
0 Replies and 1000 Views
Multiple Iplots to same postscript file? 1000 0
Started by Deleted User
I have twelve separate iplots I want to combine into one postscript file; is there an easy way to do this (preferably without having to run them all again, but either way) I tried creating a new iplot with twelve windows and copypasting them in, but that didn't go over well; they came out small, squished and in weird dimensions. Is there any way to just save them all to the same .eps file
Thanks,
Sam
|
|
|
|
0 |
1000 |
27 Jul 2010 12:29 PM |
|
2 Replies and 1151 Views
CEA projection 1151 2
Started by Deleted User
Hello, community!
If I would like to use routine "MAP_SET" to establishes the axis type and coordinate conversion mechanism, which projection type I should choose for CEA projection CEA stands for 'Cylindrical Equal Area'.
Thanks!
|
|
|
|
2 |
1151 |
23 Jul 2010 02:02 PM |
|
0 Replies and 1023 Views
IDL 8.0 is now available 1023 0
Started by Deleted User
IDL 8.0 is now available for download from the ITT VIS website. This is a major, significant development effort for IDL that includes:
- Graphics That Are Powerful Yet Easy - New graphics functions for plot, surface, contour, image and map create dynamic, presentation- quality visualizations.
- Enhanced, Expanded Programming Language - New control features, core data types and a modern scripting syntax that is familiar makes developing IDL code and applications fast and easy.
- Simpl...
|
|
|
|
0 |
1023 |
22 Jul 2010 02:45 PM |
|
2 Replies and 1034 Views
Problem adding a vector to a new EVF file using ENVI_EVF_DEFINE_ADD_RECORD 1034 2
Started by Deleted User
Howdy, community!
I'm not sure which board (IDL or ENVI) this post should go in, but I'm going to try IDL first, since I'm using an ENVI function in an IDL program.
My problem is basically this: I've opened an EVF file which consists of a contour polygon. This polygon needs to be solidly filled programmatically, and I've done that. Now, I'm ready to put this polygon back into an EVF file and convert it to a shapefile. Problem is, I'm very new to IDL / ENVI / Image Proces...
|
|
|
|
2 |
1034 |
22 Jul 2010 12:33 PM |
|
0 Replies and 1113 Views
Cloud tracking 1113 0
Started by Deleted User
Hi all,
Does anyone know how to track clouds in a satellite image If not, are there any references/resources that might be helpful for me I've tried some tracking algorithms but since the image has longitude and latitude lines, it doesn't work efficiently. Anything will help.
Thank you,
C.L.
|
|
|
|
0 |
1113 |
21 Jul 2010 10:06 PM |
|
0 Replies and 1121 Views
Reading a binary file using readu 1121 0
Started by Deleted User
Hi,
I have been trying to use a binary file created using fortran by the 'readu' command but I am unable to. My file is a 2 column 121 row array. I could read it if I use a FOR statement like this:
INPT = 'COORD_PTS.DAT'
OPENR, 14, INPT, /F77_UNFORMATTED
FOR J=0,120 DO BEGIN
READU, 14, X, Z
PRINT,X,Z
ENDFOR
CLOSE,14
But I want to read it as an array so as to use it for plotting later onwards. Help me how to read it as an array. When I try the following steps:...
|
|
|
|
0 |
1121 |
21 Jul 2010 07:38 AM |
|
0 Replies and 979 Views
IDLENVI: widget_subset 979 0
Started by Deleted User
Dear community,
I want to subset a stacked image (e.g. 4,1000,1000 dimensions) in IDL with widget_subset in ENVI. My problem is that the header of the subset (incl. UTM coordinates) does not exist after the export of the subset. The exported subset does not contain a header. How can I read out the correct header from the subseted image (likewise to the ENVI_DOIT, 'ENVI_LAYER_STACKING_DOIT')
Thanks for your answers,
Michael Wiesner
|
|
|
|
0 |
979 |
20 Jul 2010 08:45 AM |
|
1 Replies and 988 Views
a widget for display of a 2D plot 988 1
Started by Deleted User
Hi, I have a plot generated using plot2D, and I would like to put that on a GUI, which widget should I use
|
|
|
|
1 |
988 |
19 Jul 2010 07:44 AM |
|
2 Replies and 822 Views
import las lidar 822 2
Started by Deleted User
Hello Everyone
I need to import 40 files las lidar, to envi format, for then mosaicking ..... I write the next script....... but no found ...
could someone help me with this
please
F80='(80("-"))'
F80E='(80("="))'
F120='(120("-"))'
F120E='(120("="))'
F120S='(120("*"))'
; *********************************************************************
; PARAMETERS
; ******************************************...
|
|
|
|
2 |
822 |
15 Jul 2010 03:45 PM |
|
1 Replies and 1311 Views
Just need IDL virtual machine! 1311 1
Started by Deleted User
Hi,
I am trying to run a program called DEM2TOPO to convert a geoTIFF file to a .mp file for a GPS. And I need IDL virtual machine to run DEM2TOPO. Where can I download it
Cheers,
|
|
|
|
1 |
1311 |
14 Jul 2010 04:07 PM |
|
1 Replies and 1143 Views
idlde doesn't work on Fedora 11 1143 1
Started by Deleted User
/.metadata/.log error file is decribed below.
!SESSION 2010-07-14 16:32:38.576 -----------------------------------------------
eclipse.buildId=unknown
java.version=1.5.0_11
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_US
Command-line arguments: -os linux -ws gtk -arch x86
!ENTRY org.eclipse.osgi 4 0 2010-07-14 16:32:40.096
!MESSAGE Application error
!STACK 1
java.lang.UnsatisfiedLinkError: no swt-pi-gtk-34...
|
|
|
|
1 |
1143 |
14 Jul 2010 01:35 AM |
|
1 Replies and 1046 Views
How can make equation of temperature 1046 1
Started by Deleted User
Hi everybody
I don’t know about making equation of temperature in IDL, I have few information about this matter. Could you help me about this matter I will be appreciated if you give me more details about this. Thank you
Sincerely Yours, Hadi
|
|
|
|
1 |
1046 |
13 Jul 2010 08:09 PM |
|
1 Replies and 937 Views
problem with push the browse button and open a dialog 937 1
Started by Deleted User
I really don't know what was wrong, the code is so simple, but after I pushed the button, nothing happend
Pro OnPressBrowse, Event
test = DIALOG_PICKFILE()
print,'-------------------'
end
Pro simp_widg
base = widget_base(XSIZE = 800, YSIZE =600, TITLE='A Simple Example')
Textbox1 = widget_text(base,/SENSITIVE,XSIZE=80, XOffset=20, YOffset=40,value='select a file')
button =widget_button(base, XSize=60, YSize=40,Xoffset=550, Yoffset=40, value='browse',EV...
|
|
|
|
1 |
937 |
13 Jul 2010 10:49 AM |
|
0 Replies and 1059 Views
highres continent outlines with map_set 1059 0
Started by Deleted User
Hello
I am trying to set a map with high resolutoin continent outlines. I'm coding as follows (for a sub region, specified by limit):
IDL> map_set, limit=&9147,-8,60,7&93, continents = 1, highres=1
but get an error message:
Compiled module: MAP_SET.
Keyword HIGHRES not allowed in call to: MAP_SET
Execution halted at: $MAIN$
All the documentation i have indicates highres is a valid keyword, so long as the continents keyword is set to 1 , which it i...
|
|
|
|
0 |
1059 |
06 Jul 2010 06:48 AM |
|
0 Replies and 1339 Views
From fid to array 1339 0
Started by Deleted User
Dear community,
I have following problem. I want to stack two (or more) masks (each with three pixel values: 0,11 and 14) with the help of ENVIIDL. My testcode works at now with only 2 masks whose pixel-sizes and scene-sizes are different (for that reason the /EXCLUSIVE-command). The code works right until the last few lines. I want to get an three-dimensional array (img_stacked) with the two band-layers each with the same x and y dimension (the one from the bigger mask).
I'm an IDL-beg...
|
|
|
|
0 |
1339 |
05 Jul 2010 08:32 AM |
|
2 Replies and 1337 Views
write tiff from hdf band 1337 2
Started by Deleted User
Hello IDL Community,
I tried to write an IDL routine which consecutively opens bands of a hdf file and writes each of them to a tiff file, but the result looks quite speckled (in comparison to a manual save in ENVI). So far, I cannot figure out the error; consulted the IDL help for different hdf procedures and functions without success (perhaps missed somthing important, I don't know - it is the first time of working with hdf file).
The hdf file includes several VI bands (data type inte...
|
|
|
|
2 |
1337 |
05 Jul 2010 07:38 AM |
|