<para>Returns the union of a set of raster tiles into a single raster composed of at least one band. The resulting raster's extent is the extent of the whole set. In the case of intersection, the resulting value is defined by <varname>uniontype</varname> which is one of the following: LAST (default), FIRST, MIN, MAX, COUNT, SUM, MEAN, RANGE.</para>
<note>
- <para>In order for rasters to be unioned, they most all have the same alignment. Use <xref linkend="RT_ST_SameAlignment" /> and <xref linkend="RT_ST_SameAlignmentReason" /> for more details and help. One way to fix alignment issues is to use <xref linkend="RT_ST_Resample" /> and use the same reference raster for alignment.</para>
+ <para>In order for rasters to be unioned, they most all have the same alignment. Use <xref linkend="RT_ST_SameAlignment" /> and <xref linkend="RT_ST_NotSameAlignmentReason" /> for more details and help. One way to fix alignment issues is to use <xref linkend="RT_ST_Resample" /> and use the same reference raster for alignment.</para>
</note>
<para>Availability: 2.0.0 </para>