Thanks to Aldo for figuring it all out (and a long delayed upgrade to cable broadband), I finally downloaded GSC. I found a few things along the way to improve on Aldo's method:
First, there are at least 4 versions of GSC available from CDS: GSC 1.1, the original, CDS catalog # I-220 GSC 1.2, recalibrated for better astrometric accuracy, CDS # I-254 GSC-ACT, an even better recalibration, CDS # I-255 GSC 2.2, a much deeper catalog, similar in size to USNO-A. But the download time would not be practical for just about anyone. So I wanted GSC-ACT. I wanted to keep it simple, so I tried Aldo's second method. For some reason, GSC-ACT is hard to find in most lists on CDS's website, but the link Aldo gave, with ..I/220/GSC replaced by ..I/255/GSC-ACT, works. This is also the link you'll find if you click help>catalogs in CdC and scroll down to the GSC section. But I found the downloads at this site to be very slow- not just because the files are not compressed- it was _much_ slower. Maybe a temporary problem on their end. So I checked out the first option, using <http://cdsweb.u-strasbg.fr/viz-bin/ftp-index?/ftp/cats/bincats/GSC_ACT> to get the ACT version. There is something listed as [TAR file] on that page, looking like the tar files for each dec range, but this is the entire 300 MB catalog all at once. With Winzip set as Patrick described, after downloading I extracted to ../ciel/cat/GSC-ACT and the whole thing unzipped to the proper form. So you don't have to download all the individual dec range tar files. You should be able to do the same thing with the second option- get it all at once- by going up one level to ..I/255, and dragging the GSC-ACT folder to your ..ciel/cat folder. No unzipping, but the download will be (at least) twice as long. In either case, in CdC, prefs>catalogs>stars2, select the HST GSC "compact" option and set the pointer to ..ciel/cat/GSC-ACT -John --- tonon_a <[EMAIL PROTECTED]> wrote: > > In conclusion, there are at least two ways to get the GSC files: > > 1) > > -go to http://cdsweb.u-strasbg.fr/viz-bin/ftp- > index?/ftp/cats/bincats/GSC_1.1 > -in each directory there is a tar file; download all these files > (i.e. http://cdsweb.u-strasbg.fr/viz-bin/ftp- > index?/ftp/cats/bincats/GSC_1.1/N8230/.tar you will obtain > _cdsarc_cats_bincats_GSC_1[1].1_N8230.tar) > -unzip each .tar file into the corresponding directory (i.e. the > previous file into c:/ciel/cat/gsc/N8230 (with the correct winzip > setting as Patrick suggested) > > 2) > > -go to ftp://cdsarc.u-strasbg.fr/pub/cats/I/220/GSC/ > -drag N0000,... (but not all in the same time!) directories into > c:/ciel/cat/gsc directory > > > The second method is simpler; with the first method the download > looks a bit faster, but more time is needed to build the directory > tree. > > Thanks again! > Aldo __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com ------------------------ Yahoo! Groups Sponsor --------------------~--> In low income neighborhoods, 84% do not own computers. At Network for Good, help bridge the Digital Divide! http://us.click.yahoo.com/EA3HyD/3MnJAA/79vVAA/1.XolB/TM --------------------------------------------------------------------~-> To Post a message, send it to: [email protected] To Unsubscribe, send a blank message to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/skychart-discussion/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
