<refsection>
<title>Description</title>
- <para>raster is a spatial data type used to represent raster data such as those imported from jpegs, tiffs, pngs, digital elevation models.
+ <para>raster is a spatial data type used to represent raster data such as those imported from JPEGs, TIFFs, PNGs, digital elevation models.
Each raster has 1 or more bands each having a set of pixel values. Rasters can be georeferenced.</para>
<note>
<para>Requires PostGIS be compiled with GDAL support. Currently rasters can be implicitly converted to geometry type, but the conversion returns the