// 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);
}
