cyllat_c

 Procedure Abstract Required_Reading Keywords Brief_I/O Detailed_Input Detailed_Output Parameters Exceptions Files Particulars Examples Restrictions Literature_References Author_and_Institution Version Index_Entries

#### Procedure

```   void cyllat_c ( SpiceDouble    r,
SpiceDouble    lonc,
SpiceDouble    z,
SpiceDouble *  lon,
SpiceDouble *  lat )

```

#### Abstract

```
Convert from cylindrical to latitudinal coordinates.
```

```
None.
```

#### Keywords

```
CONVERSION,  COORDINATES

```

#### Brief_I/O

```
VARIABLE  I/O  DESCRIPTION
--------  ---  --------------------------------------------------
r          I   Distance of point from z axis.
lonc       I   Cylindrical angle of point from XZ plane (radians).
z          I   Height of point above XY plane.
radius     O   Distance of point from origin.
lon        O   Longitude of point (radians).
lat        O   Latitude of point (radians).
```

#### Detailed_Input

```
r          Distance of the input point from z axis.

lonc       Cylindrical angle of the point from XZ plane (radians).

z          Height of the point above XY plane.
```

#### Detailed_Output

```
radius     Distance of the input point from origin.

lon        Longitude (i.e. angle from the XZ plane) of the input
point (radians). `lon' is set equal to `lonc'.

lat        Latitude (i.e. angle above the XY plane) of the input
point (radians). The range of `lat' is [-pi, pi].
```

```
None.
```

```
Error free.
```

```
None.
```

#### Particulars

```
This routine converts coordinates given in cylindrical
coordinates to coordinates in latitudinal coordinates.

Latitudinal coordinates are the same coordinates as use for
the earth.  Latitude refers to angle above the equator, longitude
to angle east from a meridian, and radius to the distance from
an origin.
```

#### Examples

```
Below are two tables:  The first is a set of input values
the second is the result of the following sequence of
calls to Spicelib routines.  Note all input and output angular
quantities are in degrees.

convrt_c ( lonc , "DEGREES", "RADIANS", lonc  );

cyllat_c ( r, lonc , z, &radius, &lon, &lat   );

convrt_c ( lon,  "RADIANS", "DEGREES", lon    );
convrt_c ( lat,  "RADIANS", "DEGREES", lat    );

Inputs:                         Results:

r        lonc     z             radius   lon     lat
------   ------   ------        ------   ------   ------
1.0000     0       0            1.0000     0        0
1.0000    90.00    0            1.0000    90.00     0
1.0000   180.00    1.000        1.4142   180.00    45.00
1.0000   180.00   -1.000        1.4142   180.00   -45.00
0.0000   180.00    1.000        1.0000   180.00    90.00
0.0000    33.00    0            0.0000    33.00     0.00
```

```
None.
```

```
None.
```

#### Author_and_Institution

```
E.D. Wright     (JPL)
W.L. Taber      (JPL)
```

#### Version

```   -CSPICE Version 1.1.1, 26-JUL-2016 (BVS)

-CSPICE Version 1.1.0, 23-JUL-2001 (NJB)

Removed tab characters from source file.

-CSPICE Version 1.0.1, 08-FEB-1998 (EDW)

Corrected and clarified header entries.  Removed return call.

-CSPICE Version 1.0.0, 25-OCT-1997   (EDW)
```

#### Index_Entries

```
cylindrical to latitudinal
```
`Wed Apr  5 17:54:30 2017`