[8] | 1 | # -*- coding: iso-8859-15 -*- |
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| 2 | import os |
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| 3 | import Numeric |
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| 4 | |
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| 5 | import cdms |
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| 6 | import MV |
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| 7 | import vcs |
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| 8 | |
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| 9 | # filtre un flichier créé par cdms avec un ncdump, puis un ncgen. |
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| 10 | def filtre_dump (fichier): |
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| 11 | os.spawnlp(os.P_WAIT,"filtre_dump","filtre_dump",fichier,fichier) |
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| 12 | |
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| 13 | |
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| 14 | # calcul le tableau d'index d'un axe de points de terre |
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| 15 | # (ie kindex2D[i,j] = land[kij]), |
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| 16 | # ainsi que les indices inversés |
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| 17 | # (ie ( iland[ kindex2D[i,j]],jland[kindex2D[i,j]] ) = ( i,j )). |
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| 18 | # l'algorithme est celui utilisé dans ORCHIDEE. |
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| 19 | def calcul_kindex(kindex2D,iland,jland,axisLand,iim,jjm): |
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| 20 | kij=0 |
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| 21 | for ki in axisLand: |
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| 22 | j = int((ki-1)/iim) |
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| 23 | i = int(((ki-1) - j*iim)) |
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| 24 | kindex2D[i,j] = int(kij) |
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| 25 | iland[kij] = i |
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| 26 | jland[kij] = j |
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| 27 | #kindex2Dt[jjm-1-j,i] = kij |
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| 28 | kij = kij+1 |
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| 29 | return |
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| 30 | |
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| 31 | # calcul le vecteur des points de terre à partir du tableau des index |
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| 32 | # (ie land[kij] = kindex2D[i,j]) |
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| 33 | # l'algorithme est celui utilisé dans ORCHIDEE. |
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| 34 | def calcul_axisLand(kindex2D,iim,jjm,missing_value): |
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| 35 | axisLand = [] |
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| 36 | kij=0 |
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| 37 | for j in range(jjm): |
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| 38 | for i in range(iim): |
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| 39 | if (kindex2D[i,j] < missing_value): |
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| 40 | ki = int(j*iim + i + 1) |
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| 41 | axisLand.append(ki) |
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| 42 | # vérification : |
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| 43 | if (j != (ki-1)/iim or i != ((ki-1) - j*iim)): |
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| 44 | print "Erreur calcul_axisLand au ",kij,"-ième point de terre pour (i,j) = ",i,j," et land_i = ",ki |
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| 45 | kij = kij+1 |
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| 46 | return(MV.array(axisLand)) |
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| 47 | |
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| 48 | |
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| 49 | # Converti une variable d'axes [t,z,land] (avec land les points de terre) |
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| 50 | # en une variable 2D (lat,lon) |
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| 51 | def conversion2D(VarIn, kindex, nbindex, iim, jjm, missing_value): |
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| 52 | VarOut = missing_value*MV.ones((jjm,iim)) |
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| 53 | for j in range(jjm): |
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| 54 | for i in range(iim): |
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| 55 | if (kindex[i,j] < missing_value): |
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| 56 | #print i,j,kindex[j,i],(jjm-1)-j |
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| 57 | VarOut[j,i] = VarIn[kindex[i,j]] |
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| 58 | return(VarOut) |
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| 59 | |
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| 60 | # Converti une variable 2D (lat,lon) en |
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| 61 | # une variable d'axe land (les points de terre). |
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| 62 | def conversion2Dinv(VarIn, kindex, nbindex, iim, jjm, missing_value): |
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| 63 | VarOut = missing_value*MV.ones(nbindex) |
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| 64 | ii=0 |
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| 65 | for j in range(jjm): |
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| 66 | for i in range(iim): |
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| 67 | if (kindex[i,j] < missing_value): |
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| 68 | VarOut[ii] = VarIn[j,i] |
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| 69 | ii=ii+1 |
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| 70 | return(VarOut) |
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| 71 | |
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| 72 | # Pour les graphiques : même fonction, avec la latitude inversée. |
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| 73 | def conversion2DGr(VarIn, kindex, nbindex, iim, jjm, missing_value): |
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| 74 | VarOutGr = missing_value*Numeric.ones((jjm,iim)) |
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| 75 | for j in range(jjm): |
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| 76 | for i in range(iim): |
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| 77 | if (kindex[i,j] < missing_value): |
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| 78 | #print i,j,kindex[j,i],(jjm-1)-j |
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| 79 | VarOutGr[(jjm-1)-j,i] = VarIn[kindex[i,j]] |
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| 80 | return(VarOutGr) |
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| 81 | |
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| 82 | # Pour les graphiques : inverse la latitude d'une variable 2D |
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| 83 | def inverse2DGr(VarIn, kindex, nbindex, iim, jjm, missing_value): |
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| 84 | VarOutGr = missing_value*Numeric.ones((jjm,iim)) |
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| 85 | for j in range(jjm): |
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| 86 | for i in range(iim): |
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| 87 | if (kindex[i,j] < missing_value): |
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| 88 | VarOutGr[(jjm-1)-j,i] = VarIn[j,i] |
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| 89 | return(VarOutGr) |
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| 90 | |
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| 91 | # Calcul l'échelle iso d'une variable Var, dans un graphique grd, avec une valeur missing_value. |
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| 92 | # On décale les grandeurs min/max de decal % |
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| 93 | def errlevGr(Var, grd, decal, missing_value): |
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| 94 | minv = cdms.MV.minimum(Var) |
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| 95 | maxv = cdms.MV.maximum(Var) |
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| 96 | if (minv > 0): |
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| 97 | minv = minv*(1-decal/100.) |
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| 98 | else: |
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| 99 | minv = minv*(1+decal/100.) |
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| 100 | if (maxv > 0): |
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| 101 | maxv = maxv*(1+decal/100.) |
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| 102 | else: |
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| 103 | maxv = maxv*(1-decal/100.) |
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| 104 | diffv = (maxv - minv)/10. |
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| 105 | errlevs = vcs.mkevenlevels(minv,maxv,12) |
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| 106 | errlevs.append(missing_value) |
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| 107 | errlevs.insert(0,missing_value) |
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| 108 | cols = vcs.getcolors(errlevs) |
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| 109 | |
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| 110 | return(errlevs, cols) |
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| 111 | |
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| 112 | |
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| 113 | |
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| 114 | # The input VarIn is a land variable. |
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| 115 | # The output variable is 2D ( [jjm,iim] or [jmin:(jmax+1),imin:(imax+1)] ) |
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| 116 | # and if calcland==1, it returns too : |
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| 117 | # zoomkindex, zoomiim, zoomjjm, nlandz, |
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| 118 | # invindex, ifenetre =(imin,imax,jmin,jmax) |
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| 119 | def zoom_land(VarIn, kindex, nbindex, lat, lon, iim, jjm, limits, missing_value, calcland=1): |
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| 120 | # where limits is in the order : [limit_W, limit_E, limit_N, limit_S] |
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| 121 | VarOut = missing_value*Numeric.ones((jjm,iim)) |
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| 122 | # inverse of kindex |
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| 123 | invindex = Numeric.zeros((nbindex,2)) |
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| 124 | imin = iim+1 |
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| 125 | imax = -1 |
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| 126 | jmin = jjm+1 |
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| 127 | jmax = -1 |
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| 128 | for j in range(jjm): |
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| 129 | for i in range(iim): |
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| 130 | if (kindex[i,j] < missing_value): |
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| 131 | if ( limits[0] <= lon[j,i] and lon[j,i] <= limits[1] |
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| 132 | and limits[3] <= lat[j,i] and lat[j,i] <= limits[2] ): |
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| 133 | imin = min(imin, i) |
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| 134 | imax = max(imax, i) |
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| 135 | jmin = min(jmin, j) |
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| 136 | jmax = max(jmax, j) |
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| 137 | invindex[kindex[i,j],0]=j |
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| 138 | invindex[kindex[i,j],1]=i |
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| 139 | VarOut[j,i] = VarIn[kindex[i,j]] |
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| 140 | zoomiim = imax - imin +1 |
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| 141 | zoomjjm = jmax - jmin +1 |
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| 142 | #print imin, imax, jmin, jmax |
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| 143 | #print zoomiim, zoomjjm |
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| 144 | # pourquoi le +1 ???? (python ??) => nécessaire en tout cas. |
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| 145 | # à cause des lat/lon qui doivent anglober la zone zoomée |
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| 146 | VarOutZoom = VarOut[jmin:(jmax+1),imin:(imax+1)] |
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| 147 | if (calcland==1): |
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| 148 | zoomkindex = Numeric.ones((zoomiim,zoomjjm))*int(missing_value) |
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| 149 | nlandz=0 |
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| 150 | for j in range(jjm): |
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| 151 | for i in range(iim): |
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| 152 | if (kindex[i,j] < missing_value): |
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| 153 | if ( limits[0] <= lon[j,i] and lon[j,i] <= limits[1] |
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| 154 | and limits[3] <= lat[j,i] and lat[j,i] <= limits[2] ): |
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| 155 | zoomkindex[i-imin, j-jmin] = kindex[i,j] |
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| 156 | nlandz=nlandz+1 |
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| 157 | print "zoom : dimension", zoomiim, zoomjjm, nlandz |
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| 158 | # print "zoom : nouvel index ",zoomkindex |
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| 159 | return(VarOutZoom, zoomkindex, zoomiim, zoomjjm, nlandz, |
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| 160 | invindex, (imin, imax, jmin, jmax)) |
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| 161 | else: |
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| 162 | return(VarOutZoom) |
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| 163 | |
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| 164 | |
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| 165 | # The input VarIn is a land variable. |
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| 166 | # The output variable is 2D ( [jjm,iim] or [jmin:(jmax+1),imin:(imax+1)] ) |
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| 167 | # Simplified version of precedent one. |
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| 168 | def zoom_land_simpl(VarIn, kindex, nbindex, zoomiim, zoomjjm, ifenetre, missing_value): |
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| 169 | # where limits is in the order : [limit_W, limit_E, limit_N, limit_S] |
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| 170 | (imin, imax, jmin, jmax) = ifenetre |
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| 171 | VarOutZoom = missing_value*Numeric.ones((zoomjjm,zoomiim)) |
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| 172 | for i in range(zoomiim): |
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| 173 | for j in range(zoomjjm): |
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| 174 | ki=kindex[imin+i,jmin+j] |
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| 175 | if (ki < missing_value): |
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| 176 | VarOutZoom[j,i] = VarIn[ki] |
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| 177 | return(VarOutZoom) |
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| 178 | |
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| 179 | |
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| 180 | # The input VarIn is a 2D variable. |
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| 181 | # the output variable is 2D ( [jjm,iim] or [jmin:(jmax+1),imin:(imax+1)] ) |
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| 182 | # and if calcland==1, it returns too : |
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| 183 | # zoomkindex, zoomiim, zoomjjm, nlandz, |
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| 184 | # invindex, ifenetre =(imin,imax,jmin,jmax) |
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| 185 | def zoom(VarIn, kindex, nbindex, lat, lon, iim, jjm, limits, missing_value, calcland=1): |
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| 186 | # where limits is in the order : [limit_W, limit_E, limit_N, limit_S] |
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| 187 | imin = iim+1 |
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| 188 | imax = -1 |
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| 189 | jmin = jjm+1 |
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| 190 | jmax = -1 |
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| 191 | for j in range(jjm): |
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| 192 | for i in range(iim): |
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| 193 | if (kindex[i,j] < missing_value): |
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| 194 | if ( limits[0] <= lon[j,i] and lon[j,i] <= limits[1] |
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| 195 | and limits[3] <= lat[j,i] and lat[j,i] <= limits[2] ): |
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| 196 | imin = min(imin, i) |
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| 197 | imax = max(imax, i) |
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| 198 | jmin = min(jmin, j) |
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| 199 | jmax = max(jmax, j) |
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| 200 | invindex[kindex[i,j],0]=j |
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| 201 | invindex[kindex[i,j],1]=i |
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| 202 | zoomiim = imax - imin +1 |
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| 203 | zoomjjm = jmax - jmin +1 |
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| 204 | # pourquoi le +1 ???? (python ??) => nécessaire en tout cas. |
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| 205 | # à cause des lat/lon qui doivent anglober la zone zoomée |
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| 206 | VarOutZoom = VarIn[jmin:(jmax+1),imin:(imax+1)] |
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| 207 | if (calcland == 1): |
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| 208 | zoomkindex = Numeric.ones((zoomiim,zoomjjm))*int(missing_value) |
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| 209 | nlandz=0 |
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| 210 | for j in range(jjm): |
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| 211 | for i in range(iim): |
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| 212 | if (kindex[i,j] < missing_value): |
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| 213 | if ( limits[0] <= lon[j,i] and lon[j,i] <= limits[1] |
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| 214 | and limits[3] <= lat[j,i] and lat[j,i] <= limits[2] ): |
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| 215 | zoomkindex[i-imin, j-jmin] = kindex[i,j] |
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| 216 | nlandz=nlandz+1 |
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| 217 | print "zoom : dimension",zoomiim, zoomjjm, nlandz |
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| 218 | # print "zoom : nouvel index ",zoomkindex |
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| 219 | return(VarOutZoom, zoomkindex, zoomiim, zoomjjm, nlandz, |
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| 220 | invindex, (imin, imax, jmin, jmax)) |
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| 221 | else: |
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| 222 | return(VarOutZoom) |
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| 223 | |
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| 224 | # The input VarIn is a 2D variable. |
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| 225 | # the output variable is 2D [jmin:(jmax+1),imin:(imax+1)] |
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| 226 | def zoom2D(VarIn, lat, lon, iim, jjm, limits, missing_value): |
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| 227 | # where limits is in the order : [limit_W, limit_E, limit_N, limit_S] |
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| 228 | imin = iim+1 |
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| 229 | imax = -1 |
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| 230 | jmin = jjm+1 |
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| 231 | jmax = -1 |
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| 232 | for j in range(jjm): |
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| 233 | for i in range(iim): |
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| 234 | if ( limits[0] <= lon[j,i] and lon[j,i] <= limits[1] |
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| 235 | and limits[3] <= lat[j,i] and lat[j,i] <= limits[2] ): |
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| 236 | imin = min(imin, i) |
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| 237 | imax = max(imax, i) |
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| 238 | jmin = min(jmin, j) |
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| 239 | jmax = max(jmax, j) |
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| 240 | zoomiim = imax - imin +1 |
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| 241 | zoomjjm = jmax - jmin +1 |
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| 242 | VarOutZoom = VarIn[jmin:(jmax+1),imin:(imax+1)] |
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| 243 | return(VarOutZoom) |
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| 244 | |
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| 245 | # The input VarIn is a 2D variable. |
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| 246 | # the output variable is 2D ( [jjm,iim] or [jmin:(jmax+1),imin:(imax+1)] ) |
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| 247 | # Simplified version of precedent one. |
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| 248 | def zoom_simpl(VarIn, zoomiim, zoomjjm, ifenetre, missing_value): |
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| 249 | # where limits is in the order : [limit_W, limit_E, limit_N, limit_S] |
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| 250 | (imin, imax, jmin, jmax) = ifenetre |
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| 251 | VarOutZoom = missing_value*Numeric.ones((zoomjjm,zoomiim)) |
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| 252 | VarOutZoom = VarIn[jmin:(jmax+1),imin:(imax+1)] |
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| 253 | return(VarOutZoom) |
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| 254 | |
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| 255 | |
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| 256 | tab_mois=[31,28,31,30,31,30,31,31,30,31,30,31] |
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| 257 | |
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| 258 | # Conversion Month/Day => Num of Day in year |
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| 259 | def monthday_to_numday(month,day): |
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| 260 | #Tableau definissant la duree des mois dans un calendrier de 365 jours |
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| 261 | numday=sum(tab_mois[0:(month-1)])+day |
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| 262 | return(numday) |
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| 263 | |
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| 264 | # Rajoute dans le fichier "fichier" les tableaux bounds_lat et bounds_lon |
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| 265 | # pour le rendre compatible avec la convention CF. |
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| 266 | |
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| 267 | # def rajoutBounds(fichier,lat,lon,nland,land,kindex,nbindex,missing_value) |
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| 268 | # bounds_lon = Numeric.zeros((nland,,4)) |
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| 269 | # bounds_lat = Numeric.zeros((nland,,4)) |
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| 270 | # for j in range(jjm): |
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| 271 | # for i in range(iim): |
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| 272 | # if (kindex[i,j] < missing_vlaue): |
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| 273 | # #print i,j,kindex[i,j],(jjm-1)-j |
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| 274 | # VarOut[i,j] = VarIn[kindex[i,j]] |
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| 275 | # return(VarOut) |
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| 276 | |
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| 277 | |
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| 278 | # Construction des tableaux de coordonnées 2D nav_lat et nav_lon |
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| 279 | def Construit_nav_l(ax_lat, ax_lon, missing_v): |
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| 280 | Mones=Numeric.ones((len(ax_lat),1)) |
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| 281 | Slon=Numeric.array([ax_lon]) |
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| 282 | nvlon=MV.dot(Mones,Slon) |
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| 283 | nav_lon=cdms.createVariable(nvlon, |
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| 284 | typecode = cdms.MV.Float16, |
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| 285 | fill_value = missing_v, |
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| 286 | attributes={'name': 'nav_lon', |
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| 287 | 'valid_min': -180., |
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| 288 | 'valid_max': 180., |
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| 289 | 'long_name': 'Longitude', |
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| 290 | 'units': 'degrees_east' }, |
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| 291 | axes = [ ax_lat, ax_lon ], |
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| 292 | id = 'nav_lon') |
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| 293 | |
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| 294 | Mones=Numeric.swapaxes(Numeric.ones((len(ax_lon),1)),0,1) |
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| 295 | tmplat=Numeric.swapaxes(Numeric.array([ax_lat]),0,1) |
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| 296 | nvlat=MV.dot(tmplat, Mones) |
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| 297 | nav_lat=cdms.createVariable(nvlat, |
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| 298 | typecode = cdms.MV.Float16, |
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| 299 | fill_value = missing_v, |
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| 300 | attributes={'name': 'nav_lat', |
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| 301 | 'valid_min': -90., |
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| 302 | 'valid_max': 90., |
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| 303 | 'long_name': 'Latitude', |
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| 304 | 'units': 'degrees_north' }, |
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| 305 | axes = [ ax_lat, ax_lon ], |
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| 306 | id = 'nav_lat') |
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| 307 | return (nav_lat, nav_lon) |
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