====== Mapping =======

Heterodyne mapping is done by offset pointing the telescope. Especially for larger maps, [[otfmap]] is more efficient for larger maps because a common reference position is used for all the cells in each row. 

==== UIP commands ====

  - Point by point mapping using position switching with a specified reference position. This example uses looping commands to make a 3 x 3 map in equatorial coordinates with 15 arcsec spacing. \\ ''__uip__> ** for i 1 to 3 ** '' \\ ''__uip__> ** \_ rao /map (i-2)*15 ** '' \\ ''__uip__> ** \_ for j 1 to 3 ** '' \\ ''__uip__> ** \_\_ deco /map (j-2)*15 ** '' \\ ''__uip__> ** \_\_ oo_scan //N// /designated_off **'' \\ ''__uip__> ** \_ next ** '' \\ ''__uip__> ** next ** ''
    * At each map position, the telescope will move asymmetrically \\ ''OFF ON''
    * //N// is the number of repetitions of this pattern. 
    * The reference position must be specified in the source [[cso:telescope:uip:catalog|catalog]] as //target//:off_position.
  - Same example but without the looping commands. \\ ''__uip__> ** rao /map -15 ** '' \\ ''__uip__> ** deco /map -15 ** '' \\ ''__uip__> ** oo_scan //N// /designated_off **'' \\ ''__uip__> ** deco /map 0 ** '' \\ ''__uip__> ** oo_scan //N// /designated_off **'' \\ ''__uip__> ** deco /map +15 ** '' \\ ''__uip__> ** oo_scan //N// /designated_off **'' \\ etc.