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0 Replies and 1634 Views
Reading GRIB, GRIB2 files 1634 0
Started by Deleted User
Does anyone have experience reading the GRIB or GRIB2 formats, used by the National Weather Service
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1634 |
02 Feb 2006 06:14 AM |
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0 Replies and 1707 Views
Callable IDL in Windows Clusters 1707 0
Started by Deleted User
In an effort to use IDL in a C Windows environment we are trying to port Princeton mpIDL so that it will build with Visual Studio .NET 2003 and execute under Win2K and WinXP. The code and examples work well under Linux, Princeton mpIDL's original target.
We are able to get the code to build but it crashes upon reaching IDL_MAIN, the first IDL statement encountered. On the other hand, as far as I can tell from the External Development Guide, IDL_MAIN is only discussed under UNIX/VMS and unde...
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1707 |
26 Jan 2006 12:49 PM |
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0 Replies and 1891 Views
save as feature stopped working in IDL 6.2 1891 0
Started by Deleted User
My 'save as' option has stopped working in my IDLDE editor under WindowsXP in version 6.2. It just happened today and I cannot correlate it with anything else as I have been frequently using that feature through yesterday. It works correctly under 6.1. I have uninstalled and reinstalled 6.2 without effect. If anyone has a solution or suggestion I'd be happy to hear it.
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0 |
1891 |
26 Jan 2006 09:02 AM |
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1 Replies and 1794 Views
calculation NDVI 1794 1
Started by Deleted User
hi everybody
I am working with temporal modis coposite 16 days images. I did a stack layer choosing the NDVI band per one year and I would like to calculate the NDVI per this year. The range of values are betweenn -3000 and 10000. I would like to divide by 10000 in this way I can get the NDVI. the problem is that I dont find the expresion to introduce in bandmath or IDL.
Can you help me thanks
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1 |
1794 |
26 Jan 2006 03:04 AM |
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1 Replies and 1944 Views
Plotting 3D radar data from TRMM Precipitation Radar 1944 1
Started by Deleted User
I have loaded data from TRMM Precipitation Radar originally in HDF format into a structure that contains:
lat (ns,nr), lon(ns,nr) and dbz(nc,ns,nr), where ns is the number of radar 'scans', nr is the number of 'rays' and nc is the number of 'cells'. Typical size of these arrays are ns=49,nr=343 and nc=80. Basically, nc and nr describe the horizontal geolocation and nc is in the vertical (each 'cell' is 250 m with cell 79 at the earth ellipsoid).
What I want to do is to plot dBZ in a 3-d co...
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1 |
1944 |
24 Jan 2006 07:18 AM |
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0 Replies and 1613 Views
Retrieve data without opening the XROI 1613 0
Started by Deleted User
'XROI, kneeImg, REGIONS_OUT = femurROIout, STATISTICS = femurStats' gives me ROI region from femurROIout. I can do 'XROI, kneeImg, REGIONS_IN = femurROIout, STATISTICS = tibiaStats' to define the same region for a different image. I need statistic data for same region from different images. My question is how I can do this without opening XROI window. Once user defines a ROI, program automatically retrieve the data from the rest.
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1613 |
19 Jan 2006 09:25 AM |
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1 Replies and 1581 Views
Retrieve data without opening the image 1581 1
Started by Deleted User
'XROI, kneeImg, REGIONS_OUT = femurROIout, STATISTICS = femurStats' gives me ROI region from femurROIout. I can do 'XROI, kneeImg, REGIONS_IN = femurROIout, STATISTICS = tibiaStats' to define the same region for a different image. I need statistic data for same region from different images. My question is how I can do this without opening XROI window. Once user defines a ROI, program automatically retrieve the data from the rest.
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1 |
1581 |
19 Jan 2006 09:24 AM |
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0 Replies and 1822 Views
Displaying Political Boundaries using IDL 1822 0
Started by Deleted User
Hi. I'm trying to display an image of the United States and overlay some political boundaries onto it. The problem is that my boundaries are off, especially on the west coast. They are too small for the image.
Here's a link to the image: http://cse.unl.edu/~jschirf/overlay.JPG
I've tried using map_image to correct, but haven't had any luck. Here is my code:
pro overlay
compile_opt strictarr
envi, /restore_base_save_files
envi_batch_init
; Retrie...
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1822 |
14 Jan 2006 04:04 PM |
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6 Replies and 1968 Views
IDL on Dual Core Apple MacBook 1968 6
Started by Deleted User
I would like to know RSI's plans for porting IDL to the new Apple Intel platforms. Many research scienticsts use Mac OSX platforms, and since Apple is going the way of Intel, I hope that RSI will announce its intentions to port IDL to Mac/Intel in the near future.
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6 |
1968 |
12 Jan 2006 06:04 PM |
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0 Replies and 1712 Views
Setting contrast based on Hounsfield units 1712 0
Started by Deleted User
Sir, Madam, I'm still working on CTscans and I want to set different contrast depending on HUs. For example, I want to vizualize lungs in black and other structures in white on a chest exam. How can I do Must I adjust the value of the minimum and maximum of the image to -600 and 1600
Sheers
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1712 |
09 Jan 2006 03:33 AM |
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0 Replies and 1844 Views
Rice decompression 1844 0
Started by Deleted User
I would like to know if anyone has written (or tried to write) a Rice decompression routine in IDL.
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1844 |
04 Jan 2006 10:11 AM |
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1 Replies and 1813 Views
add new bands to image 1813 1
Started by Deleted User
Hi
How can i add new bands to image and manipulate bands with idl
Think you
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1 |
1813 |
30 Dec 2005 02:04 PM |
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0 Replies and 2241 Views
How to read Hounsfield's units on a CT scan ? 2241 0
Started by Deleted User
Sir, Ma'am, I'm trying to set a function to read HUs rather than the grey scale on a DICOM image from a CTscan. How must I proceed
Sheers
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0 |
2241 |
28 Dec 2005 11:17 AM |
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1 Replies and 1659 Views
watershed operation 1659 1
Started by Deleted User
Please provide me WATERSHED function source code
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1 |
1659 |
16 Dec 2005 07:38 PM |
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1 Replies and 1904 Views
how to allocate more memory? 1904 1
Started by Deleted User
I am trying to display grayscale images in a scroll widget that are about 38,000 pixels long and 1,000 wide, and IDL doesn't have the memory to do it. The exact error is this:
WIDGET_CONTROL: Unable to create X windows pixmap (BadAlloc (insufficient
resources for operation)).
Please tell me there's a way to allocate more memory to do this!
Thanks,
Chris Jackolski
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1 |
1904 |
13 Dec 2005 11:12 PM |
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0 Replies and 1836 Views
GIF images in IDL Student Edition 1836 0
Started by Deleted User
Hello,
Does anyone know if I can produce GIF images with IDL SE I have heard that I can not get a license for GIF generation under the SE, but can this license be obtained from elsewhere
Thanks in advance,
Simon
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1836 |
13 Dec 2005 06:43 AM |
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0 Replies and 1911 Views
help on Image/spectral math 1911 0
Started by Deleted User
I want to do a simple ratio of image(*, cols, rows) over spectral (*) using ENVI. I have a IDL code as below, but it does not work through band math function. Any help will be appreciated it.
function atmc, b1, s1
; do the ratio of image to atmos correction spectra
imgdim=size(b1,/dimensions)
cols=imgdim&911&93
rows=imgdim&912&93
for i = 0, rows -1 do begin
for m = 0, cols - 1 do begin
result = b1(*, m, i) / s1(*)
endfor
endfor
return, result
end
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1911 |
12 Dec 2005 06:17 PM |
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0 Replies and 1628 Views
IDL Student Edition on SuSE 9.2 or 10.0 1628 0
Started by Deleted User
Hello,
I use SuSE Linux 9.2 and will be upgrading to version 10. Has anyone been able to install IDL SE on this operating system as I shall be purchasing it soon
Thanks in advance,
Simon
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1628 |
07 Dec 2005 11:18 AM |
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0 Replies and 1805 Views
Help regarding some basic syntax 1805 0
Started by Deleted User
Hi,
I am trying to understand a code written by different author so that I can modify it for my purpose. However, since my experience with IDL is limited and I am trying to learn on my own, I am not able to understand some of the syntax or statement.
Please click here:
http://idlastro.gsfc.nasa.gov/ftp/pro/fits/sxpar.pro
sxpar.pro: I am not able to understand the statements on line 184 and 190. I would really appreciate if somebody can explain it to me.
Statement on line 184:
...
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1805 |
06 Dec 2005 09:25 AM |
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0 Replies and 1714 Views
plot data with color 1714 0
Started by Deleted User
Hello all:
I want to plot data point with specified color. The data file is the form:
1.3 1.3 1
2.2 2.1 2
2.4 2.3 3
3.2 1.2 4
1.2 5.2 5
There are three values each raw.
The first two values corresponds to x and y , the position of a 2d plot.
I want to use the third value to determine the color of the point.
Do you have any suggestion to do so
Thanks very much.
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1714 |
04 Dec 2005 06:05 AM |