LL: Latitude Longitude

Strictly speaking, Latitude/Longitude is not a projection. All coordinates in this projection are measured in units of latitude and longitude, based on an ellipsoid or datum. For this projection, the UNIT parameter must be set to any of the angular measurement units listed below.

Angular Measurement Units

FME Unit Name

Angular Measurement in Degrees

DEGREE

   1.0

GRAD

   0.9

GRADE

   0.9

MAPINFO

   0.000001

MIL

   0.05625

MINUTE

   0.01666666666666666666

RADIAN

   57.2957795130823208772

SECOND

   0.00027777777777777777

DECISEC

   0.00002777777777777777

CENTISEC

   0.00000277777777777777

MILLISEC

   0.00000027777777777777

In addition, either an EL_NAME or DT_NAME is required.

Parameter Name

Description

PARM1

The minimum longitude that will be used. Longitudes smaller than this will be expressed as positive longitudes by adding 360 to them. This is used to control where the discontinuity in longi­tude measurements will occur.

This value must be less than or equal to 0 and greater than or equal to -360.

If not specified, the default is -180.

PARM2

The maximum longitude that will be used. Longitudes larger than this will be expressed as negative longitudes by subtracting 360 from them.

This value must be greater than or equal to 0 and greater than or equal to 360.

Though not required, normally the range between PARM1 and PARM2 is 360.

If not specified, the default is 180.

ORG_LNG

Use this parameter to specify, in degrees relative to Greenwich, a prime meridian (other than Greenwich) that is to be used.