NCL Home > Documentation > Functions > Lat/Lon functions

latGlobeFo

Generates latitudes and associated metadata for a global fixed offset grid.

Prototype

load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"

	function latGlobeFo (
		nlat     [1] : integer or long,  
		name     [1] : string,           
		longname [1] : string,           
		units    [1] : string            
	)

	return_val [*] :  default float

Arguments

nlat

A scalar equal to the number of latitudes desired.

As of version 6.0.0, this can be of type integer or long.

name

A string that will become the named dimension of the output (e.g. "lat").

longname

A string that will become the long_name of the output (e.g. "latitude").

units

A string that will become the units of the output (e.g. "degrees_north").

Return value

A one-dimensional array of size nlat. Type float.

Description

Generates latitudes and associated metadata that will run from -90 to +90.

Examples

The following require that contributed.ncl be loaded prior to invoking the function.

       load "$NCARG_ROOT/lib/ncarg/nclscripts/csm/contributed.ncl"

Example 1

Create a one-dimensional array of latitudes (coordinate array). The values are offset from the pole.

      nlat = 72
      lat  = latGlobeFo(nlat, "lat", "latitude", "degrees_north")
      print(lat)

The above returns a 1D array of length nlat values.


Variable: lat
Type: float
Total Size: 288 bytes
            72 values
Number of Dimensions: 1
Dimensions and sizes:   [lat | 72]
Coordinates: 
            lat: [-88.75..88.75]
Number Of Attributes: 2
  long_name :   latitude
  units :       degrees_north
(0)     -88.75
(1)     -86.25
(2)     -83.75
(3)     -81.25
(4)     -78.75
[snip]
(67)     78.75
(68)     81.25
(69)     83.75
(70)     86.25
(71)     88.75

Note 1: if North to South ordering is desired, use standard subscripting to reverse the order.

     lat = lat(::-1)     ; N -> S order

Note 2: If double precision is desired, set