Aldo, I did a little bit more study, and found that the N8230 that I downloaded from ftp://cdsarc.u-strasbg.fr/pub/cats/I/220/GSC/ also works when I put it in a folder I called /GSC-comp/, and then checked the "HST GSC compact" box and set the reference to this directory. I only had this one zone in the catalog folder, and when I moved to a different part of the sky, CdC wanted to read a zone from a CD. This confirms Patrick's success as well. Now, I actually went to the ftp site, and not your http site. This may be one difference of importance. (I don't know if these two URLs, yours and mine, point to the exact same file, but I suspect they don't since Patrick had to unzip the http'd file and I didn't have to unzip the ftp'd file.) When you get to the ftp site, then each of the 24 directories are visible. I simply right-clicked and dragged N8230 to my desktop, and selected "Copy". It took a few minutes to download, but I didn't have to do any further decompression. What I got was not a .tar file, as I suggested earlier, but the compact binary .gsc file itself. If you open it with Notepad, you'll see that there are a lot of non-printing characters - a sure sign of some sort of binary file. If I open my "original FITS" files, they are all ASCII (and hence expand to 1.18 GB instead of 330+ MB). It sure is a lot of time-consuming downloading, but if you are still stuck, then I would recommend COPYing N8230 from the ftp address above, as I did, putting it in a folder called anything you like, e.g. GSC-compact, and then starting CdC and pointing the catalog selector for "compact" to that directory. If you then go to the NCP, you can zoom in and see for yourself that the GSC stars are represented. Don't forget to set the magnitude limit in "Stars1" faint enough so that you don't filter them out. If it works for you, you can then go about copying the other 23 directories, which as you know will take a while! Hope this helps, Dick --- In [email protected], "tonon_a" <[EMAIL PROTECTED]> wrote: > > Hi Dick, > In effect, the content of my directories is different. From your > example, my 4630.GSC is 5KB and 4619.GSC is 77KB > I downloaded everything from: > http://cdsweb.u-strasbg.fr/viz-bin/ftp- > index?/ftp/cats/bincats/GSC_1.1/N8230 > If I select in CDC the "HST GSC compact" option, the program accepts > the directory and its contents (the C:\ciel\cat\gsc window is white), > but I have the "Access violation at address 002242AD in > module 'CATALOG.DLL' ..." > If I select "HST Guide Star Catalog" option, CDC accepts the > directory, but prompts the following message:"Mount disk for GSC > C:\ciel\cat\gsc" > So, as you already told me, it looks that I am working with something > that is still compressed, but I don't know how to decompress these > files or from where download the correct ones. > In addition I have not a \tables directory (if you move them to > another directory, does CDC still work? > What do you think? > Regards, > Aldo > > --- In [email protected], "Dick Berg" <[EMAIL PROTECTED]> > wrote: > > > > Hi Aldo, > > Sorry for the delay in response. I was on travel. > > Yes there should be 24 directories, named N0000, N0730, ... , > > S8230. In each directory there will be a variable number of files. > > For example, in N8230, I have 48 files, from 4615.gsc to 4662.gsc. > > The smallest file(s) in this directory are 26 KB (e.g. 4629.gsc) > and > > the largest file is 293 KB (4619.gsc). Does your directory N8230 > > look like this? > > There are a total of 9537 .gsc files altogether. (The last file > in > > S8230 is 9537.gsc. > > > > The directory (folder) structure should look like this: > > ...\GSC\ > > .......\N0000\ > > .............\0001.gsc > > .............\0002.gsc > > etc. > > to .....\0593.gsc > > > > .......\N0730\ > > .............\0594.gsc > > etc. > > > > .......\N1500\ > > etc. > > .......\N2230\ > > etc > > etc > > .......\S8230\ > > > > There is also a TABLES\ directory, which is part of the GSC > > catalog. I do not know whether CdC requires it, but probably it > > does. If so, then it looks like this: > > ...\TABLES\ > > ..........\lg_reg_x.tbl > > etc. > > > > When you point CdC to the GSC catalog, make sure you point to the > > parent directory containing both the \GSC\ and \TABLES\ > > directories!! and not to the \GSC\ directory itself. This is > > important. > > > > If you still have trouble I will look further into the catalog > > source you specified from cdsarc. Let me know how you are doing. > > > > Regards, > > > > Dick > > > > --- In [email protected], "tonon_a" > <[EMAIL PROTECTED]> > > wrote: > > > > > > Hi Dick, > > > Sorry, I am a bit confused. > > > I downloaded 24 .tar files (_cdsarc_cats_bincats_GSC_1 > > > [1].1_N0000.tar,...) and unzipped them into 24 directories. In > > each > > > directory there are more o5 less 600 files (from 10 to 100 KB), > > for > > > example in the N0000 there are 00001.GSC,...,0593.GSC. > > > Now, how can I uncompress again those files? > > > > > > Aldo > > > > > > --- In [email protected], "tonon_a" > > <[EMAIL PROTECTED]> > > > wrote: > > > > > > > > Thanks, > > > > I will try this evening, and tell you! > > > > Aldo > > > > > > > > --- In [email protected], "Dick Berg" > > > <[EMAIL PROTECTED]> > > > > wrote: > > > > > > > > > > Hi, Aldo, > > > > > If you downloaded the GSC from Vizier or the CDC archives, > > > those > > > > > files are compressed using .gz, and this is not the same as > > > > the "HST > > > > > GSC Compact", I believe. This is what leads to the error you > > are > > > > > getting. > > > > > One way out of this is to decompress these files (all 9537 > > of > > > > > them) twice. You have to get to the original FITS format, > > > leaving > > > > > the directory structure intact, and then setting up the "HST > > GSC > > > > > original FITS" switch. The files expand to about 1.18 GB. > > > > > You can look for and download a program called BitZipper to > > do > > > > the > > > > > job. It's main strength is that it's free for a couple weeks, > > > and > > > > > you can batch process the individual N0000... directories, so > > > you > > > > > don't have to unzip/uncompress each and every file > > individually. > > > > > Hope this will help you. > > > > > Dick > > > > > > > > > > --- In [email protected], "tonon_a" > > > > <[EMAIL PROTECTED]> > > > > > wrote: > > > > > > > > > > > > > > > > > > Hi all > > > > > > > > > > > > Please, can you help me? > > > > > > > > > > > > I downloaded GCS 1.1, built the C:/ciel/cat/gsc/.. > > > > > > directories and selected, from the 'Stars 2' menu, the 'HST > > > GSC > > > > > > Compact' catalogue, but the following error is displayed: > > > > > > > > > > > > Access violation at address 002242D in > > module 'CATALOG.DLL', > > > > Read > > > > > > of address 0000004A > > > > > > > > > > > > I am using, with no other problems, the 2.76 version. > > > > > > > > > > > > Where am I wrong? > > > > > > > > > > > > Aldo
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