Index: trunk/Ohana/src/libfits/doc/notes-compress.txt
===================================================================
--- trunk/Ohana/src/libfits/doc/notes-compress.txt	(revision 15487)
+++ trunk/Ohana/src/libfits/doc/notes-compress.txt	(revision 38441)
@@ -1,2 +1,20 @@
+
+20150525 : 
+
+uncompression steps:
+
+ * read in a table: gfits_fread_ftable_data (f, &ftable, FALSE); (no byte swap)
+ * uncompress the image: gfits_uncompress_image (&buf[0].header, &buf[0].matrix, &ftable);
+   * get ZIMAGE from heaer & delete
+   * get ZCMPTYPE 
+   * get ZBITPIX, ZNAXIS, ZNAXISnn
+   * get ZTILEn (if missing ZTILE1 = Nx, others 1)
+   * get ZNAME, ZVAL
+   * ZSIMPLE, ZTENSION, ZEXTEND, ZBLOCKED, ZPCOUNT, ZGCOUNT, etc
+   * ZSCALE, ZBLANK, OBLANK, ZZERO
+
+   * data is stored in fits table COMPRESSED_DATA (1PB, 1PI, 1PJ)
+
+------------------------------------------------
 
 TFORMn : rPt(e_max)