/usr/share/ncarg/hluex/contourplot/cn12f.f is in libncarg-data 6.3.0-6build1.
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C $Id: cn12f.f,v 1.5 2010-03-15 22:49:23 haley Exp $
C
C***********************************************************************
C *
C Copyright (C) 1995 *
C University Corporation for Atmospheric Research *
C All Rights Reserved *
C *
C***********************************************************************
C
C File: cn12f.f
C
C Author: Mary Haley
C National Center for Atmospheric Research
C PO 3000, Boulder, Colorado
C
C Date: Mon Oct 16 11:02:58 MDT 1995
C
C Description: This example emulates LLU example "cpex08". It
C draws a filled map with filled contours appearing in
C Africa. In order to mask Africa from the map fill, we
C use the mpMaskAreaSpecifiers resource and mask all of
C the countries in Africa.
C
external NhlFAppClass
external NhlFCairoWindowWorkstationClass
external NhlFNcgmWorkstationClass
external NhlFPSWorkstationClass
external NhlFPDFWorkstationClass
external NhlFCairoPSPDFWorkstationClass
external NhlFCairoImageWorkstationClass
external nhlfscalarfieldclass
external nhlfcontourplotclass
external nhlfmapplotclass
integer appid,wid,dataid,conid,mapid
integer rlist
parameter(M = 40, N = 40)
real z(M,N)
integer len_dims(2)
character*7 wks_type
C
C Areas we want to fill.
C
character*5 fillspcs(2)
data fillspcs/'water','land'/
C
C Areas we want to mask (countries of Africa).
C
character*30 maskspcs(50)
data maskspcs/'algeria','angola','angola-exclave-called-cabinda',
+ 'benin','botswana','burundi','cameroon',
+ 'central-african-republic','chad','congo','djibouti','egypt',
+ 'equatorial-guinea','ethiopia','gabon','gambia','ghana',
+ 'guinea','guinea-bissau','ivory-coast','kenya','lesotho',
+ 'liberia','libya','madagascar','malawi','mali','mauritania',
+ 'mauritius','morocco','mozambique','namibia','niger',
+ 'nigeria','rwanda','senegal','sierra-leone','somalia',
+ 'south-africa','sudan','swaziland','tanzania','togo',
+ 'tunisia','uganda','upper-volta','western-sahara','zaire',
+ 'zambia','zimbabwe'/
C
C Define the workstation type
C
wks_type = "x11"
call NhlFInitialize
C
C Create an application object.
C
call NhlFRLCreate(rlist,'SETRL')
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'appUsrDir','./',ierr)
call NhlFCreate(appid,'cn12',NhlFAppClass,0,rlist,ierr)
if (wks_type.eq."ncgm".or.wks_type.eq."NCGM") then
C
C Create an NCGM workstation.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkMetaName','./cn12f.ncgm',ierr)
call NhlFCreate(wid,'cn12Work',NhlFNcgmWorkstationClass,
1 0,rlist,ierr)
else if (wks_type.eq."x11".or.wks_type.eq."X11") then
C
C Create an X workstation.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkPause','True',ierr)
call NhlFCreate(wid,'cn12Work',
+ NhlFCairoWindowWorkstationClass,
1 0,rlist,ierr)
else if (wks_type.eq."oldps".or.wks_type.eq."OLDPS") then
C
C Create an older-style PostScript workstation.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkPSFileName','./cn12f.ps',ierr)
call NhlFCreate(wid,'cn12Work',NhlFPSWorkstationClass,
1 0,rlist,ierr)
else if (wks_type.eq."oldpdf".or.wks_type.eq."OLDPDF") then
C
C Create an older-style PDF workstation.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkPDFFileName','./cn12f.pdf',ierr)
call NhlFCreate(wid,'cn12Work',NhlFPDFWorkstationClass,
1 0,rlist,ierr)
else if (wks_type.eq."pdf".or.wks_type.eq."PDF".or.
+ wks_type.eq."ps".or.wks_type.eq."PS") then
C
C Create a cairo PS/PDF object.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkFileName','./cn12f',ierr)
call NhlFRLSetstring(rlist,'wkFormat',wks_type,ierr)
call NhlFCreate(wid,'cn12Work',NhlFCairoPSPDFWorkstationClass,
1 0,rlist,ierr)
else if (wks_type.eq."png".or.wks_type.eq."PNG") then
C
C Create a cairo PNG object.
C
call NhlFRLClear(rlist)
call NhlFRLSetstring(rlist,'wkFileName','./cn12f',ierr)
call NhlFRLSetstring(rlist,'wkFormat',wks_type,ierr)
call NhlFCreate(wid,'cn12Work',NhlFCairoImageWorkstationClass,
1 0,rlist,ierr)
endif
C
C Call the routine 'gendat' to create an array of contour data.
C Create a ScalarField data object and hand it the data created by
C 'gendat'.
C
call NhlFRLClear(rlist)
len_dims(1) = N
len_dims(2) = M
call gendat(z,M,M,N,15,15,-10.,110.)
call NhlFRLSetmdfloatarray(rlist,'sfDataArray',z,2,len_dims,ierr)
call NhlFRLSetFloat(rlist,'sfXCStartV',-18.,ierr)
call NhlFRLSetFloat(rlist,'sfXCEndV',52.,ierr)
call NhlFRLSetFloat(rlist,'sfYCStartV',-35.,ierr)
call NhlFRLSetFloat(rlist,'sfYCEndV',38.,ierr)
call NhlFCreate(dataid,'DataPlot',nhlfscalarfieldclass,appid,
1 rlist,ierr)
C
C Create a ContourPlot object using the above data field, and make sure
C the LabelBar is displayed.
C
call NhlFRLClear(rlist)
call NhlFRLSetInteger(rlist,'cnScalarFieldData',dataid,ierr)
call NhlFCreate(conid,'con1',nhlfcontourplotclass,wid,rlist,ierr)
C
C Create a map object, specifying the areas we want filled and masked.
C
call NhlFRLClear(rlist)
call NhlFRLSetFloat(rlist,'vpXF',0.1,ierr)
call NhlFRLSetStringArray(rlist,'mpMaskAreaSpecifiers',maskspcs,
+ 50,ierr)
call NhlFRLSetStringArray(rlist,'mpFillAreaSpecifiers',fillspcs,2,
+ ierr)
call NhlFRLSetString(rlist,'pmLabelBarDisplayMode','always',ierr)
call NhlFCreate(mapid,'map',nhlfmapplotclass,wid,rlist,ierr)
call NhlFAddOverlay(mapid,conid,-1,ierr)
call NhlFDraw(mapid,ierr)
call NhlFFrame(wid,ierr)
C
C Destroy the workstation object and exit.
C
call NhlFDestroy(wid,ierr)
call NhlFClose
stop
end
subroutine gendat (data,idim,m,n,mlow,mhgh,dlow,dhgh)
C
C This is a routine to generate test data for two-dimensional graphics
C routines. Given an array 'DATA', dimensioned 'IDIM x 1', it fills
C the sub-array ((DATA(I,J),I=1,M),J=1,N) with a two-dimensional field
C of data having approximately 'MLOW' lows and 'MHGH' highs, a minimum
C value of exactly 'DLOW' and a maximum value of exactly 'DHGH'.
C
C 'MLOW' and 'MHGH' are each forced to be greater than or equal to 1
C and less than or equal to 25.
C
C The function used is a sum of exponentials.
C
dimension data(idim,1),ccnt(3,50)
fovm=9./float(m)
fovn=9./float(n)
nlow=max0(1,min0(25,mlow))
nhgh=max0(1,min0(25,mhgh))
ncnt=nlow+nhgh
do 101 k=1,ncnt
ccnt(1,k)=1.+(float(m)-1.)*fran()
ccnt(2,k)=1.+(float(n)-1.)*fran()
if (k.le.nlow) then
ccnt(3,k)=-1.
else
ccnt(3,k)=+1.
end if
101 continue
dmin=+1.e36
dmax=-1.e36
do 104 j=1,n
do 103 i=1,m
data(i,j)=.5*(dlow+dhgh)
do 102 k=1,ncnt
temp=-((fovm*(float(i)-ccnt(1,k)))**2+
+ (fovn*(float(j)-ccnt(2,k)))**2)
if (temp.ge.-20.) data(i,j)=data(i,j)+
+ .5*(dhgh-dlow)*ccnt(3,k)*exp(temp)
102 continue
dmin=amin1(dmin,data(i,j))
dmax=amax1(dmax,data(i,j))
103 continue
104 continue
do 106 j=1,n
do 105 i=1,m
data(i,j)=(data(i,j)-dmin)/(dmax-dmin)*(dhgh-dlow)+dlow
105 continue
106 continue
return
end
function fran ()
dimension rseq (100)
save iseq
data rseq / .749,.973,.666,.804,.081,.483,.919,.903,.951,.960 ,
+ .039,.269,.270,.756,.222,.478,.621,.063,.550,.798 ,
+ .027,.569,.149,.697,.451,.738,.508,.041,.266,.249 ,
+ .019,.191,.266,.625,.492,.940,.508,.406,.972,.311 ,
+ .757,.378,.299,.536,.619,.844,.342,.295,.447,.499 ,
+ .688,.193,.225,.520,.954,.749,.997,.693,.217,.273 ,
+ .961,.948,.902,.104,.495,.257,.524,.100,.492,.347 ,
+ .981,.019,.225,.806,.678,.710,.235,.600,.994,.758 ,
+ .682,.373,.009,.469,.203,.730,.588,.603,.213,.495 ,
+ .884,.032,.185,.127,.010,.180,.689,.354,.372,.429 /
data iseq / 0 /
iseq=mod(iseq,100)+1
fran=rseq(iseq)
return
end
subroutine bndary
C
C Draw a line showing where the edge of the plotter frame is.
C
call plotif (0.,0.,0)
call plotif (1.,0.,1)
call plotif (1.,1.,1)
call plotif (0.,1.,1)
call plotif (0.,0.,1)
call plotif (0.,0.,2)
C
C Done.
C
return
C
end
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