[postgis-users] PostGIS Rasters Overview Factor

Osahon Oduware osahon.gis at gmail.com
Wed May 10 09:04:23 PDT 2017

Hi All,

I tried loading a raster with overviews using the raster2pgsql tool using
the syntax below:

raster2pgsql -s <SRID> -d -Y -e -I -C -F -M -l
/path/to/raster/file <table_name> | psql -h <host_address> -U postgres -p
5432 -d <database>

but it gave an error message stating that the overview factor cannot be
more than 1,000.

I would like to know how the Overview-factor works. Must the value for the
Overview-factor be in Powers of 2 (i.e. 2,4,8,16,...)?

I would be glad if someone could help my understanding.
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