# DefineNolPrjLatLon Method

## Description

Creates a named Latitude/Longitude Coordinate Reference System in a Named Object Library, replacing any existing **Coordinate Reference System** with the same name.

## Syntax

Visual Basic |
---|

Public Function DefineNolPrjLatLon( _ ByVal |

## Parameters

*prj*- The named
**Coordinate Reference System**to create, or replace. *lat*- The
**Coordinate Reference System**latitude origin, in degrees. See**Remarks**. *lon*- The
**Coordinate Reference System**longitude origin, in degrees. See**Remarks**. *datum*- The named Geodetic Datum on which to base the coordinate reference system. This can be any named
**Geodetic Datum**previously created, or loaded from a**Named Object Library**. *bDeg*-
`True`

Store coordinates in degrees. `False`

Store coordinates in radians.

## Remarks

A (0.0,0.0) origin should normally be used when matching a **Coordinate Reference System** to external data. If the **Coordinate Reference System** is going to be used for creating new data then using a local (lat,lon) origin near the centre of the expected extents allows Spatial References to be used with a smaller span, thus increasing the Spatial Reference resolution.

** Available:** GEO D OM OD SISpy

*Groups:*

## Example

*sis.*DefineNolPrjLatLon("NewProj", 0.0, 0.0, "USER90", 0)