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1 Replies and 1159 Views
griddata 1159 1
Started by Deleted User
I'm trying to use GRIDDATA, but I find it incredibly slow and running out of memory very easily.
This is the command:
grid = GRIDDATA(new_easting, new_northing, new_array, /GRID, xout=xout, yout=yout)
- new_easting is a 211*179 long array with x coordinates of my data set
- new_northing is a 211*179 long array with y coordinates of my data set
- new_array is a 211*179 integer array with the values of my data set
- xout is a 2736 long array with the x coordinates I want m...
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1 |
1159 |
31 Aug 2010 02:42 PM |
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0 Replies and 1179 Views
IDL Java bridge, JVM crash 1179 0
Started by Deleted User
Hi,
I use IDL 7.1 on a 64 bit Linux machine. Using IDL-jave bridge my JVW crashes with a segmentation fault everytime I get an exception in the same code on other machines. Running 32 bit IDL with a 32 bit JVM also end in segfaults.
Is this an IDL bug or am I doing something wrong
Stefan
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0 |
1179 |
30 Aug 2010 08:58 AM |
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1 Replies and 965 Views
Change pixel DN in image to unique values 965 1
Started by Deleted User
I have an image where each DN is 0. I want to change the DN values to unique numbers that increase by a unit of 1 according to the pixel location in the array. For example if I have an image where there are 2 rows, 2 colums, I want to go from
0000 1234
0000 to 5678.
Only this image is much larger. Is there an easy way to do this in ENVI or IDL (before I write the code myself)
Thanks.
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1 |
965 |
27 Aug 2010 07:34 AM |
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0 Replies and 916 Views
Active contours (snakes) 916 0
Started by Deleted User
I'm looking for IDL source code to get started on using active contours (also called snakes) for segmenting medical images. Does anyone have any they would be willing to share, or know of any out there
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0 |
916 |
26 Aug 2010 07:14 PM |
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1 Replies and 999 Views
if clause with two files 999 1
Started by Deleted User
dear all,
to find a subject saying everything i want to know is very difficult. i will try it in this thread and i hope, there is somebody out there who can help me.
i've got two images, one representing the backscattering intensity and the second the conrresponding incidence angle of the radarwave. now, i want to define if-loops or something similar, to apply thresholds.
in detail...if the incidence angle is between 15 and 20 and the backscattering intensity is above, let me s...
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1 |
999 |
26 Aug 2010 02:41 AM |
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1 Replies and 1166 Views
Extract data based on Spatial Overlay 1166 1
Started by Deleted User
Hi,
I have two files, one with 25 km pixels, the other with 300 m pixels. What I need to do is:
1) for every one of the 25 km pixels in the first image, identify and count all the 300 m pixels from the second image that lie geographically within each 25 km pixel ;
2) identify and count all of the 300 m pixels (from within each specific 25 km pixel) that have a specific band value;
once these steps have been accomplished, I'll then determine the fraction of the above 300 m pixel...
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1 |
1166 |
25 Aug 2010 02:51 PM |
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1 Replies and 986 Views
IDL and Java 986 1
Started by Deleted User
Dear users,
I have an IDL source code with some math functions and i wish to have the same functions and calculations in java to create a gui and to make it portable to other operating systems.
Do you think i should rewrite all the code in java and so do a complete porting or there are simpler solutions such as calling the IDL functions from java using solutions such as Corba or others without rewriting all the IDL code in java
P.S. The IDL language known as Interface Definition Lan...
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1 |
986 |
20 Aug 2010 08:20 PM |
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0 Replies and 1145 Views
BUFR and NAT files 1145 0
Started by Deleted User
Hey all,
I received data from EUMETSAT and they are NAT files and BUFR files. Does anyone know how to read data in these formats using IDL Any help is greatly appreciated.
Thank you,
Chaunte
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0 |
1145 |
20 Aug 2010 06:11 PM |
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0 Replies and 989 Views
gauss_inter 989 0
Started by Deleted User
Hi,
Is there anyone who is familiar with "gauss_interp" function/pro.
I am running an idl routine which exist compiling at gauss_interp. I have no idea why.
In the routine it is called as a function. But, no where it has defined the function
Please help me to resolve this.
Thanks in advance.
vivek
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0 |
989 |
20 Aug 2010 02:45 AM |
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0 Replies and 917 Views
plot function controls 917 0
Started by Deleted User
Hi,
Just curious if there is any way to have the plot function controls (color, symbols, save, position reset etc) that appear at the bottom of the new window when no window is specified appear when plotting to a specified widget_window Is there any way to add these controls to the window after creation access the methods and reproduce the same effect
Currently only able to zoom/select parts of the plot.
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0 |
917 |
18 Aug 2010 12:38 PM |
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0 Replies and 899 Views
Large array assignment 899 0
Started by Deleted User
When trying to assign a very large array (fltarr(182,21,8,35,9,9,12)) using the construct::
array1&910&93=array2
I'm finding that only part of the array is filled in, on the other hand:
array1&91*&93=array2
uses 3 times the total space of the array at peak.
&91N.B. the
array1=array2
form can't be used as the target is in a shared memory segment&93
Is this a known limitation or a bug
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0 |
899 |
17 Aug 2010 04:04 PM |
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0 Replies and 888 Views
coordinate transformation and mapping help needed in IDL 8.0 888 0
Started by Deleted User
Hello everyone,
I recently installed the new IDL 8.0 on my machine and am having difficulties overplotting scattered geographical data onto map projections. I have data in single columns of latitude, longitude and elevation. I have been able to do this with direct graphics easily enough in the past, however with the new object oriented graphics functions, I am having some difficulty. I would like simply to create a map of the Arctic, such as this:
map1 = map('polar stereographic',limit=&...
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0 |
888 |
17 Aug 2010 08:25 AM |
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3 Replies and 1043 Views
plot function, /ylog, and plot title 1043 3
Started by Deleted User
Hi folks,
I just installed IDL 8.0 and have been transferring over to the new PLOT function (as opposed to the old procedure). I am having a recurring problem when setting the axis to log scale and specifying a plot title. For example:
IDL> x = findgen(100)1
IDL> y = findgen(100)1
IDL> p = plot(x,y)
IDL> p.ylog=1
IDL> p.title='Test'
...produces a title "Test" in an odd location for me (far below the upper plot box boundary and in the middle of the data spa...
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3 |
1043 |
16 Aug 2010 04:52 PM |
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1 Replies and 899 Views
OPLOT and WINDOW 899 1
Started by Deleted User
Hi there,
Does anyone know if it's possible to plot to a window, then open another window and plot to that, and then return to the original window and overplot I've tried using WSET, but the OPLOT doesn't remember the original PLOT.
In code terms it looks something like:
FOR i=0,4 DO BEGIN
IF (i EQ 0) THEN BEGIN
WINDOW,0,TITLE='Original Plots'
PLOT, array1, array2&91i,*&93
ENDIF ELSE BEGIN
WSET=0 & OPLOT,array1, array2&91i,*&93 ; So...
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1 |
899 |
16 Aug 2010 07:46 AM |
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1 Replies and 1087 Views
intensity plot without gridding/interpolation 1087 1
Started by Deleted User
Dear forum users,
I am an absolute beginner with IDL and I have a problem which I can’t solve by myself.
I am using IDL Version 7.1 and I try to create a simple intensity plot.
I have three vectors (1d arrays): x, y, and z. x and y are the coordinates for the z value. x and y are not equidistant (only approximatively).
Until now I used
iimage,z,x,y
which produces with the IDL Gridding Wizzard nice images but not the images I want to have. I do not want that my data ...
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1 |
1087 |
15 Aug 2010 07:23 AM |
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0 Replies and 1149 Views
General question about registering 1149 0
Started by Deleted User
Hi,
Have registered recently on here and I'm trying to access the downloads page.
However, it comes up with a message about my account being processed by ITT VIS and that I can not access the page until this has been done.
Was just wondering if anyone could remember how long this takes.
Many Thanks!!
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0 |
1149 |
12 Aug 2010 09:08 AM |
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0 |
1171 |
10 Aug 2010 04:53 PM |
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0 |
905 |
10 Aug 2010 04:52 PM |
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1 Replies and 1292 Views
gradual slowing down of process overnight 1292 1
Started by Deleted User
Hello,
I set up a small IDL script that ran overnight while my machine was otherwise unloaded, and it smoothly slowed down in a systematic way as it ran. I am wondering what could be going on.
Here's what the script is doing. I have a set of approximately 50,000 ascii data files gzipped on disk, all very nearly the same size. The IDL script reads in the list of these files, and then performs a for loop, which does the following:
gunzip a data file to a temporary file
...
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1 |
1292 |
04 Aug 2010 08:41 AM |
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0 Replies and 1837 Views
Correlation between various bands of remote sensing data 1837 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...
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0 |
1837 |
02 Aug 2010 09:24 AM |