// Initialize the Lambert Conformal Conic projection long Projectoid::lamccinvint( double r_maj, // major axis double r_min, // minor axis double lat1, // first standard parallel double lat2, // second standard parallel double c_lon, // center longitude double c_lat, // center latitude double false_east, // x offset in meters double false_north) // y offset in meters { double sin_po; // sin value double cos_po; // cos value double con; // temporary sin value double ms1; // small m 1 double ms2; // small m 2 double temp; // temporary variable double ts0; // small t 0 double ts1; // small t 1 double ts2; // small t 2 r_major = r_maj; r_minor = r_min; false_easting = false_east; false_northing = false_north; // Standard Parallels cannot be equal and on opposite sides of the equator if (fabs(lat1 + lat2) < EPSLN) { p_error("Equal Latitiudes for St. Parallels on opposite sides of equator", "lamcc-inv"); return(41); } temp = r_minor / r_major; es = 1.0 - SQUARE(temp); e = sqrt(es); center_lon = c_lon; center_lat = c_lat; sincos(lat1, &sin_po, &cos_po); con = sin_po; ms1 = msfnz(e, sin_po, cos_po); ts1 = tsfnz(e, lat1, sin_po); sincos(lat2, &sin_po, &cos_po); ms2 = msfnz(e, sin_po, cos_po); ts2 = tsfnz(e, lat2, sin_po); sin_po = sin(center_lat); ts0 = tsfnz(e, center_lat, sin_po); if (fabs(lat1 - lat2) > EPSLN) ns = log(ms1 / ms2) / log(ts1 / ts2); else ns = con; f0 = ms1 / (ns * pow(ts1, ns)); rh = r_major * f0 * pow(ts0, ns); // Report parameters to the user ptitle("LAMBERT CONFORMAL CONIC"); radius2(r_major, r_minor); stanparl(lat1, lat2); cenlonmer(center_lon); origin(c_lat); offsetp(false_easting, false_northing); InverseOK[WCS_PROJECTIONCODE_LAMCC] = 1; InverseTransform = &Projectoid::lamccinv; return(OK); }
/* Initialize the Equidistant Conic projection ------------------------------------------*/ int eqconinvint( double r_maj, /* major axis */ double r_min, /* minor axis */ double lat1, /* latitude of standard parallel*/ double lat2, /* latitude of standard parallel*/ double center_lon, /* center longitude */ double center_lat, /* center latitude */ double false_east, /* x offset in meters */ double false_north, /* y offset in meters */ long mode) /* which format is present A B */ { double temp; /* temporary variable */ double sinphi,cosphi; /* sin and cos values */ double ms1,ms2; double ml1,ml2; /* Place parameters in static storage for common use -------------------------------------------------*/ r_major = r_maj; r_minor = r_min; lon_center = center_lon; false_northing = false_north; false_easting = false_east; temp = r_minor / r_major; es = 1.0 - SQUARE(temp); e = sqrt(es); e0 = e0fn(es); e1 = e1fn(es); e2 = e2fn(es); e3 = e3fn(es); tsincos(lat1,&sinphi,&cosphi); ms1 = msfnz(e,sinphi,cosphi); ml1 = mlfn(e0, e1, e2, e3, lat1); /* format B ---------*/ if (mode != 0) { if (fabs(lat1 + lat2) < EPSLN) { p_error("Standard Parallels on opposite sides of equator","eqcon-for"); return(81); } tsincos(lat2,&sinphi,&cosphi); ms2 = msfnz(e,sinphi,cosphi); ml2 = mlfn(e0, e1, e2, e3, lat2); if (fabs(lat1 - lat2) >= EPSLN) ns = (ms1 - ms2) / (ml2 - ml1); else ns = sinphi; } else ns = sinphi; g = ml1 + ms1/ns; ml0 = mlfn(e0, e1, e2, e3, center_lat); rh = r_major * (g - ml0); /* Report parameters to the user -----------------------------*/ if (mode != 0) { ptitle("EQUIDISTANT CONIC"); radius2(r_major, r_minor); stanparl(lat1,lat2); cenlonmer(lon_center); origin(center_lat); offsetp(false_easting,false_northing); } else { ptitle("EQUIDISTANT CONIC"); radius2(r_major, r_minor); stparl1(lat1); cenlonmer(lon_center); origin(center_lat); offsetp(false_easting,false_northing); } return(OK); }
/* Initialize the Albers projection -------------------------------*/ int alberinvint( double r_maj, /* major axis */ double r_min, /* minor axis */ double lat1, /* first standard parallel */ double lat2, /* second standard parallel */ double lon0, /* center longitude */ double lat0, /* center lattitude */ double false_east, /* x offset in meters */ double false_north) /* y offset in meters */ { double sin_po,cos_po; /* sine and cos values */ double con; /* temporary variable */ double temp; /* temporary variable */ double ms1; /* small m 1 */ double ms2; /* small m 2 */ double qs0; /* small q 0 */ double qs1; /* small q 1 */ double qs2; /* small q 2 */ false_easting = false_east; false_northing = false_north; lon_center = lon0; if (fabs(lat1 + lat2) < EPSLN) { p_error("Equal latitudes for Standard Parallels on opposite sides of equator" ,"alber-invinit"); return(31); } r_major = r_maj; r_minor = r_min; temp = r_minor / r_major; es = 1.0 - SQUARE(temp); e3 = sqrt(es); tsincos(lat1, &sin_po, &cos_po); con = sin_po; ms1 = msfnz(e3,sin_po,cos_po); qs1 = qsfnz(e3,sin_po,cos_po); tsincos(lat2,&sin_po,&cos_po); ms2 = msfnz(e3,sin_po,cos_po); qs2 = qsfnz(e3,sin_po,cos_po); tsincos(lat0,&sin_po,&cos_po); qs0 = qsfnz(e3,sin_po,cos_po); if (fabs(lat1 - lat2) > EPSLN) ns0 = (ms1 * ms1 - ms2 *ms2)/ (qs2 - qs1); else ns0 = con; c = ms1 * ms1 + ns0 * qs1; rh = r_major * sqrt(c - ns0 * qs0)/ns0; /* Report parameters to the user -----------------------------*/ ptitle("ALBERS CONICAL EQUAL-AREA"); radius2(r_major, r_minor); stanparl(lat1,lat2); cenlonmer(lon_center); origin(lat0); offsetp(false_easting,false_northing); return(OK); }
/* Initialize the Lambert Conformal conic projection ------------------------------------------------*/ int lamccforint( double r_maj, /* major axis */ double r_min, /* minor axis */ double lat1, /* first standard parallel */ double lat2, /* second standard parallel */ double c_lon, /* center longitude */ double c_lat, /* center latitude */ double false_east, /* x offset in meters */ double false_north) /* y offset in meters */ { double sin_po; /* sin value */ double cos_po; /* cos value */ double con; /* temporary variable */ double ms1; /* small m 1 */ double ms2; /* small m 2 */ double temp; /* temporary variable */ double ts0; /* small t 0 */ double ts1; /* small t 1 */ double ts2; /* small t 2 */ r_major = r_maj; r_minor = r_min; false_northing = false_north; false_easting = false_east; /* Standard Parallels cannot be equal and on opposite sides of the equator ------------------------------------------------------------------------*/ if (fabs(lat1+lat2) < EPSLN) { p_error("Equal Latitiudes for St. Parallels on opposite sides of equator", "lamcc-for"); return(41); } temp = r_minor / r_major; es = 1.0 - SQUARE(temp); e = sqrt(es); center_lon = c_lon; center_lat = c_lat; tsincos(lat1,&sin_po,&cos_po); con = sin_po; ms1 = msfnz(e,sin_po,cos_po); ts1 = tsfnz(e,lat1,sin_po); tsincos(lat2,&sin_po,&cos_po); ms2 = msfnz(e,sin_po,cos_po); ts2 = tsfnz(e,lat2,sin_po); sin_po = sin(center_lat); ts0 = tsfnz(e,center_lat,sin_po); if (fabs(lat1 - lat2) > EPSLN) ns = log (ms1/ms2)/ log (ts1/ts2); else ns = con; f0 = ms1 / (ns * pow(ts1,ns)); rh = r_major * f0 * pow(ts0,ns); /* Report parameters to the user -----------------------------*/ ptitle("LAMBERT CONFORMAL CONIC"); radius2(r_major, r_minor); stanparl(lat1,lat2); cenlonmer(center_lon); origin(c_lat); offsetp(false_easting,false_northing); return(OK); }