Changes between Version 7 and Version 8 of IPPstripe82

Timestamp:

May 5, 2009, 4:20:53 AM (17 years ago)

Author:

Sebastian Jester

Comment:

add note on -update option to addstar and relphot

IPPstripe82

@@ -7 +7 @@
 = Questions =
 
-* At what stage is the fake object insertion/dection run?
-* Is warptool, stacktool, difftool operation going to be automated?
+ * At what stage is the fake object insertion/dection run?
+ * Is warptool, stacktool, difftool operation going to be automated?
 
 = To-dos =
 
-* Look up the distortion correction for SDSS images and whether its WCS is good enough or not (ask Hubert Lampeitl?)
+ * Look up the distortion correction for SDSS images and whether its WCS is good enough or not (ask Hubert Lampeitl?)
 
 = Useful for everything =
@@ -662 +662 @@
  cd `ipp_datapath.pl path://S82PRODCATDIR`
  addstar -D CATDIR . -resort
- relphot -D CATDIR . -averages
+ relphot -D CATDIR . -averages -update
 }}}
 The resorted version is available for download at [http://www.mpia.de/homes/jester/IPPstripe82_catdir_20080815.tgz http://www.mpia.de/homes/jester/IPPstripe82_catdir_20080815.tgz] - a tarfile of about 250 MB that expands into a directory of about 500 MB. I have asked our computer people also to make available all the IPP outputs directly; however, those are 250 GB (no compression) so they need to figure out a way to host those. The input fpC*.fits images from SDSS are another ~50 GB. Here is the [[Image(htdocs:/images/README_IPPstripe82_20080815.txt)]].tgz
+
+=== Note on addstar, relphot and the -update option ===
+
+In fact, what happens with addstar is this:
+
+ * For large datasets, the `addstar` run by the IPP pipeline automatically adds stars to the dvo database, but does not reindex it. By hand, the effect is achieved by issuing
+{{{
+ addstar -D CATDIR . -update /file/to/new/data.cmf
+ addstar -D CATDIR . -resort
+}}}
+ In `addstar`,  `-update` means "update the catalog, but do not resort". Or "don't update completely", in some sense
+
+ * For small datasets, you can do it in one step, by just saying
+{{{
+ addstar -D CATDIR . /file/to/new/data.cmf
+}}}
+ This updates and resorts in one go.
+
+ * For `relphot`, however, `-update` means "really commit this change to the database". So without the `-update`, relphot won't do anything. Or not as much as you want.
+
+Because of this slight inconsistency of meanings between identical options, one or both of the `-update`s might be renamed soon.