Changes between Version 13 and Version 14 of Dvo_tutorial

Timestamp:

May 7, 2009, 10:09:53 PM (17 years ago)

Author:

Sebastian Jester

Comment:

add 'cursor' instructions

Dvo_tutorial

@@ -69 +69 @@
 Most commands will also com/explain what they expect if called without arguments.
 
-== Find out what's in the database ==
+== Find out what regions of sky are in the database ==
 
 {{{
@@ -77 +77 @@
  cgrid
  # Show outlines of images whose objects are in the db
+ images
+ # Find out coordinates of interesting regions interactively
+ cursor
+ # this brings up a graphics cursor - move it to an interesting point,
+ # hit any letter key, (e.g. a) to store the coordinates of that point 
+ # in variables $Ra $Da (for "RA of a, DEC of a").
+ # Or just click the mouse button to see coordinates.
+ # Get out of cursor mode by hitting 'q' (also stores $Rq $Dq), 
+ # then zoom in by resetting the 'region' and replotting
+ region $Ra $Da 1
+ cgrid
  images
 }}}