
<section
id='WCGIS_DEFDATUM_ApplicationOptions_DefaultDatum_id'>
    <title>
        Default Datum
    </title>
    <para>
        Use the Default Datum page of the <link
        target='#WCF_ApplicationOptionsDialogBox_id'>&app_name; Application
        Options dialog box</link> to set the <termtext>default datum</termtext>.
    </para>
    <exhibit>
        <img
        src='WCGIS_DEFDATUM_ApplicationOptions_DefaultDatum_ScreenCap.png'/>
    </exhibit>
    <para>
        If the majority of the geographic data that you work with is in a single
        datum, choose it as the default. Otherwise, set the default to
        WGS-84.
    </para>
    <para>
        &app_name; will assume that all geographic data is in the default
        datum unless you specify otherwise. You will be able to override
        the default datum where necessary.
    </para>
    <para>
        See <iref target='WCGIS_IntroductionToDatums_id'/> for general information on datums.
        See <iref target='WCGISxWCF_DatumControl_id'/> for information about the datum control, which you use to specify the default datum.
    </para>
</section>

