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|
include <imhdr.h>
include <math.h>
include <mwset.h>
include <pkg/skywcs.h>
include <pkg/cq.h>
# These should probably go into aimpars.h.
define IMDB_WCSDICT "|wxref|wyref|wxmag|wymag|wxrot|wyrot|wraref|wdecref|\
wproj|wsystem|"
define IMDB_WCS_WXREF 1
define IMDB_WCS_WYREF 2
define IMDB_WCS_WXMAG 3
define IMDB_WCS_WYMAG 4
define IMDB_WCS_WXROT 5
define IMDB_WCS_WYROT 6
define IMDB_WCS_WLNGREF 7
define IMDB_WCS_WLATREF 8
define IMDB_WCS_WPROJ 9
define IMDB_WCS_WSYSTEM 10
# AT_DBWCS -- Compute a FITS WCS from an image using WCS definitions
# stored in the image surveys configuration file and transferred to the
# image query results structure. At the moment I am going to keep this
# routine simple by not worrying about the units of any quantities but the
# world coordinates of the reference point. This routine can be made more
# sophisticated later as time permits. The information is there ...
int procedure at_dbwcs (im, res, update, verbose)
pointer im #I the input image descriptor
pointer res #I the image query results descriptor
bool update #I update rather than list the wcs
bool verbose #I verbose mode
double xref, yref, xmag, ymag, xrot, yrot, lngref, latref, dval
pointer sp, kfield, kname, kvalue, kunits, wtype, ctype, coo, mw
int i, ip, stat, coostat, ktype, nwcs, wkey, lngunits, latunits
double imgetd(), at_imhms()
int cq_istati(), cq_winfon(), strdic(), ctod(), ctowrd(), sk_decwcs()
bool streq()
errchk imgetd()
begin
# Return if the input is not 2D.
if (IM_NDIM(im) != 2)
return (ERR)
# Allocate working space.
call smark (sp)
call salloc (kfield, CQ_SZ_QPNAME, TY_CHAR)
call salloc (kname, CQ_SZ_QPNAME, TY_CHAR)
call salloc (kvalue, CQ_SZ_QPVALUE, TY_CHAR)
call salloc (kunits, CQ_SZ_QPUNITS, TY_CHAR)
call salloc (wtype, SZ_FNAME, TY_CHAR)
call salloc (ctype, SZ_FNAME, TY_CHAR)
# Assume some sensible defaults, e.g. the reference point is at
# the center of the image, the orientation is the standard astronomical
# orientation with ra increasing to the left and declination increasing
# to the top, the projection is tan, the coordinate system is J2000.
xref = (IM_LEN(im,1) + 1.0d0)/ 2.0d0
yref = (IM_LEN(im,2) + 1.0d0)/ 2.0d0
xmag = INDEFD
ymag = INDEFD
xrot = 180.0d0
yrot = 0.0d0
lngref = INDEFD
latref = INDEFD
call strcpy ("tan", Memc[wtype], SZ_FNAME)
call strcpy ("J2000", Memc[ctype], SZ_FNAME)
# Loop over the mwcs database quantities.
nwcs = cq_istati (res, CQNWCS)
do i = 1, nwcs {
# Get the keyword information.
if (cq_winfon (res, i, Memc[kfield], CQ_SZ_QPNAME, Memc[kname],
CQ_SZ_QPNAME, Memc[kvalue], CQ_SZ_QPVALUE, ktype, Memc[kunits],
CQ_SZ_QPUNITS) != i)
next
# Which keyword have we got ?
wkey = strdic (Memc[kfield], Memc[kfield], CQ_SZ_QPNAME,
IMDB_WCSDICT)
ip = 1
switch (wkey) {
# Get the x reference point in pixels.
case IMDB_WCS_WXREF:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
if (! IS_INDEFD(dval))
xref = dval
case IMDB_WCS_WYREF:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
if (! IS_INDEFD(dval))
yref = dval
case IMDB_WCS_WXMAG:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
if (! IS_INDEFD(dval))
xmag = dval
case IMDB_WCS_WYMAG:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
if (! IS_INDEFD(dval))
ymag = dval
case IMDB_WCS_WXROT:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
if (! IS_INDEFD(dval))
xrot = dval
case IMDB_WCS_WYROT:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
if (! IS_INDEFD(dval))
yrot = dval
case IMDB_WCS_WLNGREF:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else {
dval = at_imhms (im, Memc[kname])
if (IS_INDEFD(dval)) {
iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
}
}
if (! IS_INDEFD(dval))
lngref = dval
lngunits = strdic (Memc[kunits], Memc[kunits], CQ_SZ_QPUNITS,
SKY_LNG_UNITLIST)
case IMDB_WCS_WLATREF:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
dval = INDEFD
else if (ctod (Memc[kvalue], ip, dval) <= 0)
dval = INDEFD
} else {
dval = at_imhms (im, Memc[kname])
if (IS_INDEFD(dval)) {
iferr (dval = imgetd (im, Memc[kname]))
dval = INDEFD
}
}
if (! IS_INDEFD(dval))
latref = dval
latunits = strdic (Memc[kunits], Memc[kunits], CQ_SZ_QPUNITS,
SKY_LAT_UNITLIST)
case IMDB_WCS_WPROJ:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
call strcpy ("tan", Memc[wtype], SZ_FNAME)
else if (ctowrd (Memc[kvalue], ip, Memc[wtype],
SZ_FNAME) <= 0)
call strcpy ("tan", Memc[wtype], SZ_FNAME)
} else iferr (call imgstr (im, Memc[kname], Memc[wtype],
SZ_FNAME))
call strcpy ("tan", Memc[wtype], SZ_FNAME)
case IMDB_WCS_WSYSTEM:
if (streq (Memc[kname], "INDEF")) {
if (streq (Memc[kvalue], "INDEF"))
call strcpy ("J2000", Memc[ctype], SZ_FNAME)
else if (ctowrd (Memc[kvalue], ip, Memc[ctype],
SZ_FNAME) <= 0)
call strcpy ("J2000", Memc[ctype], SZ_FNAME)
} else iferr (call imgstr (im, Memc[kname], Memc[ctype],
SZ_FNAME))
call strcpy ("J2000", Memc[ctype], SZ_FNAME)
default:
;
}
}
# Check to see of the critical quantities image scale and reference
# point are defined. Quit if they are not, otherwise update the
# header.
if (IS_INDEFD(xmag) || IS_INDEFD(ymag) || IS_INDEFD(lngref) ||
IS_INDEFD(latref)) {
stat = ERR
} else {
# Open the coordinate system structure.
coostat = sk_decwcs (Memc[ctype], mw, coo, NULL)
# Update hte header.
if (coostat == ERR || mw != NULL) {
if (mw != NULL)
call mw_close (mw)
stat = ERR
} else {
if (lngunits > 0)
call sk_seti (coo, S_NLNGUNITS, lngunits)
if (latunits > 0)
call sk_seti (coo, S_NLATUNITS, latunits)
if (verbose)
call printf (" Writing FITS wcs using image survey db\n")
call at_uwcs (im, coo, Memc[wtype], lngref, latref, xref,
yref, xmag, ymag, xrot, yrot, false, update)
stat = OK
}
# Close the coordinate structure
if (coo != NULL)
call sk_close (coo)
}
call sfree (sp)
return (stat)
end
define NEWCD Memd[ncd+(($2)-1)*ndim+($1)-1]
# AT_UWCS -- Compute the image wcs from the user parameters.
procedure at_uwcs (im, coo, projection, lngref, latref, xref, yref,
xscale, yscale, xrot, yrot, transpose, update)
pointer im #I pointer to the input image
pointer coo #I pointer to the coordinate structure
char projection[ARB] #I the sky projection geometry
double lngref, latref #I the world coordinates of the reference point
double xref, yref #I the reference point in pixels
double xscale, yscale #I the x and y scale in arcsec / pixel
double xrot, yrot #I the x and y axis rotation angles in degrees
bool transpose #I transpose the wcs
bool update #I update rather than list the wcs
double tlngref, tlatref
int l, i, ndim, naxes, axmap, wtype, ax1, ax2, szatstr
pointer mw, sp, r, w, cd, ltm, ltv, iltm, nr, ncd, axes, axno, axval
pointer projstr, projpars, wpars, mwnew, atstr
int mw_stati(), sk_stati(), strdic(), strlen(), itoc()
pointer mw_openim(), mw_open()
errchk mw_newsystem(), mw_gwattrs()
begin
mw = mw_openim (im)
ndim = mw_stati (mw, MW_NPHYSDIM)
# Allocate working memory for the vectors and matrices.
call smark (sp)
call salloc (projstr, SZ_FNAME, TY_CHAR)
call salloc (projpars, SZ_LINE, TY_CHAR)
call salloc (wpars, SZ_LINE, TY_CHAR)
call salloc (r, ndim, TY_DOUBLE)
call salloc (w, ndim, TY_DOUBLE)
call salloc (cd, ndim * ndim, TY_DOUBLE)
call salloc (ltm, ndim * ndim, TY_DOUBLE)
call salloc (ltv, ndim, TY_DOUBLE)
call salloc (iltm, ndim * ndim, TY_DOUBLE)
call salloc (nr, ndim, TY_DOUBLE)
call salloc (ncd, ndim * ndim, TY_DOUBLE)
call salloc (axes, IM_MAXDIM, TY_INT)
call salloc (axno, IM_MAXDIM, TY_INT)
call salloc (axval, IM_MAXDIM, TY_INT)
# Open the new wcs
mwnew = mw_open (NULL, ndim)
call mw_gsystem (mw, Memc[projstr], SZ_FNAME)
iferr {
call mw_newsystem (mw, "image", ndim)
} then {
call mw_newsystem (mwnew, Memc[projstr], ndim)
} else {
call mw_newsystem (mwnew, "image", ndim)
}
# Set the LTERM.
call mw_gltermd (mw, Memd[ltm], Memd[ltv], ndim)
call mw_sltermd (mwnew, Memd[ltm], Memd[ltv], ndim)
# Store the old axis map for later use.
call mw_gaxmap (mw, Memi[axno], Memi[axval], ndim)
# Get the 2 logical axes.
call mw_gaxlist (mw, 03B, Memi[axes], naxes)
axmap = mw_stati (mw, MW_USEAXMAP)
ax1 = Memi[axes]
ax2 = Memi[axes+1]
# Set the axes and projection type.
if (projection[1] == EOS) {
call mw_swtype (mwnew, Memi[axes], ndim, "linear", "")
} else {
call sscan (projection)
call gargwrd (Memc[projstr], SZ_FNAME)
call gargstr (Memc[projpars], SZ_LINE)
call sprintf (Memc[wpars], SZ_LINE,
"axis 1: axtype = ra %s axis 2: axtype = dec %s")
call pargstr (Memc[projpars])
call pargstr (Memc[projpars])
call mw_swtype (mwnew, Memi[axes], ndim, Memc[projstr], Memc[wpars])
}
# Copy in the atrributes of the other axes.
szatstr = SZ_LINE
call malloc (atstr, szatstr, TY_CHAR)
do l = 1, ndim {
if (l == ax1 || l == ax2)
next
iferr {
call mw_gwattrs (mw, l, "wtype", Memc[projpars], SZ_LINE)
} then {
call mw_swtype (mwnew, l, 1, "linear", "")
} else {
call mw_swtype (mwnew, l, 1, Memc[projpars], "")
}
for (i = 1; ; i = i + 1) {
if (itoc (i, Memc[projpars], SZ_LINE) <= 0)
Memc[atstr] = EOS
repeat {
iferr (call mw_gwattrs (mw, l, Memc[projpars],
Memc[atstr], szatstr))
Memc[atstr] = EOS
if (strlen (Memc[atstr]) < szatstr)
break
szatstr = szatstr + SZ_LINE
call realloc (atstr, szatstr, TY_CHAR)
}
if (Memc[atstr] == EOS)
break
call mw_swattrs (mwnew, 1, Memc[projpars], Memc[atstr])
}
}
call mfree (atstr, TY_CHAR)
# Compute the referemce point world coordinates.
switch (sk_stati(coo, S_NLNGUNITS)) {
case SKY_DEGREES:
tlngref = lngref
case SKY_RADIANS:
tlngref = RADTODEG(lngref)
case SKY_HOURS:
tlngref = 15.0d0 * lngref
default:
tlngref = lngref
}
switch (sk_stati(coo, S_NLATUNITS)) {
case SKY_DEGREES:
tlatref = latref
case SKY_RADIANS:
tlatref = RADTODEG(latref)
case SKY_HOURS:
tlatref = 15.0d0 * latref
default:
tlatref = latref
}
if (! transpose) {
Memd[w+ax1-1] = tlngref
Memd[w+ax2-1] = tlatref
} else {
Memd[w+ax2-1] = tlngref
Memd[w+ax1-1] = tlatref
}
# Compute the reference point pixel coordinates.
Memd[nr+ax1-1] = xref
Memd[nr+ax2-1] = yref
# Compute the new CD matrix.
if (! transpose) {
NEWCD(ax1,ax1) = xscale * cos (DEGTORAD(xrot)) / 3600.0d0
NEWCD(ax2,ax1) = -yscale * sin (DEGTORAD(yrot)) / 3600.0d0
NEWCD(ax1,ax2) = xscale * sin (DEGTORAD(xrot)) / 3600.0d0
NEWCD(ax2,ax2) = yscale * cos (DEGTORAD(yrot)) / 3600.0d0
} else {
NEWCD(ax1,ax1) = xscale * sin (DEGTORAD(xrot)) / 3600.0d0
NEWCD(ax2,ax1) = yscale * cos (DEGTORAD(yrot)) / 3600.0d0
NEWCD(ax1,ax2) = xscale * cos (DEGTORAD(xrot)) / 3600.0d0
NEWCD(ax2,ax2) = -yscale * sin (DEGTORAD(yrot)) / 3600.0d0
}
if (! update)
call at_mwshow (mwnew, Memd[ltv], Memd[ltm], Memd[w], Memd[nr],
Memd[ncd], ndim)
# Reset the axis map.
call mw_seti (mw, MW_USEAXMAP, axmap)
# Recompute and store the new wcs if update is enabled.
call mw_saxmap (mwnew, Memi[axno], Memi[axval], ndim)
if (sk_stati (coo, S_PIXTYPE) == PIXTYPE_PHYSICAL) {
call mw_swtermd (mwnew, Memd[nr], Memd[w], Memd[ncd], ndim)
} else {
call mwmmuld (Memd[ncd], Memd[ltm], Memd[cd], ndim)
call mwinvertd (Memd[ltm], Memd[iltm], ndim)
call asubd (Memd[nr], Memd[ltv], Memd[r], ndim)
call mwvmuld (Memd[iltm], Memd[r], Memd[nr], ndim)
call mw_swtermd (mwnew, Memd[nr], Memd[w], Memd[cd], ndim)
}
# Save the fit.
if (! transpose) {
call sk_seti (coo, S_PLNGAX, ax1)
call sk_seti (coo, S_PLATAX, ax2)
} else {
call sk_seti (coo, S_PLNGAX, ax2)
call sk_seti (coo, S_PLATAX, ax1)
}
if (update) {
call sk_saveim (coo, mwnew, im)
call mw_saveim (mwnew, im)
}
# Close the wcs,
call mw_close (mwnew)
call mw_close (mw)
# Force the CDELT keywords to update. This will be unecessary when
# mwcs is updated to deal with non-quoted and / or non left-justified
# CTYPE keywords..
wtype = strdic (Memc[projstr], Memc[projstr], SZ_FNAME, WTYPE_LIST)
if (wtype > 0)
call sk_seti (coo, S_WTYPE, wtype)
call sk_ctypeim (coo, im)
# Reset the fit. This will be unecessary when wcs is updated to deal
# with non-quoted and / or non left-justified CTYPE keywords.
call sk_seti (coo, S_WTYPE, 0)
call sk_seti (coo, S_PLNGAX, 0)
call sk_seti (coo, S_PLATAX, 0)
call sfree (sp)
end
# AT_IMHMS -- Fetch a quantity form the image header that is in hms or dms
# format, e.g. in the form "+/-hh mm ss.x" or "+/-dd mm ss.s".
double procedure at_imhms (im, kname)
pointer im #I the image descriptor
char kname[ARB] #I the image keyword name
double dval, hours, minutes, seconds
pointer sp, value
int nscan()
errchk imgstr()
begin
call smark (sp)
call salloc (value, SZ_FNAME, TY_CHAR)
iferr {
call imgstr (im, kname, Memc[value], SZ_FNAME)
} then {
dval = INDEFD
} else {
call sscan (Memc[value])
call gargd (hours)
call gargd (minutes)
call gargd (seconds)
if (nscan() != 3)
dval = INDEFD
else if (hours >= 0.0d0)
dval = hours + (minutes / 60.0d0) + (seconds / 3600.0d0)
else
dval = -(abs(hours) + (minutes / 60.0d0) + (seconds / 3600.0d0))
}
call sfree (sp)
return (dval)
end
|
