Creating a Spatial Unit of Measure

Create the unit of measure by which the spatial reference system measures coordinates.

Prerequisites

Database Version	Spatial Unit of Measure Privileges
SAP Sybase IQ 15.3 and 15.4	Requires one of: DBA authority. You are a member of the SYS_SPATIAL_ADMIN_ROLE group.
SAP Sybase IQ 16.0	Requires one of: CREATE ANY OBJECT system privilege. MANAGE ANY SPATIAL OBJECT.

Task

In the Perspective Resources view, select the resource and select Resource > Administration Console.
In the left pane, select IQ Servers > Schema Objects > Spatial Support > Units of Measure.
Click the arrow next to Spatial Units of Measure and select New.
The Create Spatial Unit of Measure Wizard appears.

On the Welcome page of the wizard, specify:

Option	Description
Select a resource on which the spatial unit of measure will be created	Select a resource from the list.
(Multiplex only) Select a multiplex server on which the unit of measure will be created.	Select a resource from the list.
How would you like to create the unit of measure?	Indicate the method for creating the unit of measure; either choosing from a list of predefined units of measure, or creating a custom unit of measure.

Click Next.

(Predefined units of measure only) On the Unit Selection page of the wizard, filter the columns to locate the desired unit of measure. Highlight the unit of measure.

(Custom units of measure only) On the Custom Setting page of the wizard, specify:

Option	Description
Provide a name for the custom unit of measure	Specify a name for the unit of measure.
Which type of unit of measure do you want to create?	Linear – If you are using a projected coordinate system, the individual coordinate values represent a linear distance along the surface of the Earth to a point. Coordinate values can be measured by the meter, foot, mile, or yard. The projected coordinate system must explicitly state the linear unit of measure in which the coordinate values are expressed. Meter, metre, and planar degree are linear units of measure. Angular – Geographic features can be measured in degrees of latitude, radians, or other angular units of measure. Every spatial reference system must explicitly state the name of the unit in which geographic coordinates are measured, Radian and degree are angular units of measure.
Specify the custom unit of measure's conversion factor to another unit of measure of the same type.	<text box> XXX – Specify the number of units of your custom unit of measure. = <text box> – Specify the number of radians (select the radian type in the pull-down) equal to your specified number of custom units of measure. Every spatial reference system must explicitly state the name of the unit in which geographic coordinates are measured, and must include the conversion from the specified unit to a radian.

Option

Description

Provide a name for the custom unit of measure

Specify a name for the unit of measure.

Which type of unit of measure do you want to create?

Linear – If you are using a projected coordinate system, the individual coordinate values represent a linear distance along the surface of the Earth to a point. Coordinate values can be measured by the meter, foot, mile, or yard. The projected coordinate system must explicitly state the linear unit of measure in which the coordinate values are expressed. Meter, metre, and planar degree are linear units of measure.
Angular – Geographic features can be measured in degrees of latitude, radians, or other angular units of measure. Every spatial reference system must explicitly state the name of the unit in which geographic coordinates are measured, Radian and degree are angular units of measure.

Specify the custom unit of measure's conversion factor to another unit of measure of the same type.

<text box> XXX – Specify the number of units of your custom unit of measure.
= <text box> – Specify the number of radians (select the radian type in the pull-down) equal to your specified number of custom units of measure.

Every spatial reference system must explicitly state the name of the unit in which geographic coordinates are measured, and must include the conversion from the specified unit to a radian.