raster2pgsql

Create Extension

In order to use raster2pgsql, either by command line or the control panel, you will need to create the postgis_raster extension

su to postgres

root@demo:# su - postgres

Start psql

postgres@demo:~$ psql
psql (15.3 (Ubuntu 15.3-1.pgdg22.04+1))
Type "help" for help.

Connect to target database (in this case, postgisftw)

postgres=# \c postgisftw
You are now connected to database "postgisftw" as user "postgres".

Issue the create extension command

postgisftw=# create extension postgis_raster;
CREATE EXTENSION
postgisftw=#

raster2pgsql Loader

An included raster2pgsql tool is available if you installed Webmin.

There are 2 options for loading raster files:

  1. Load using the raster2pgsql File Loader.

  2. Load using raster2pgsql via command line.

Load via raster2pgsql Loader

Click the Shape File Loader tab as shown below

../../_images/raster2pgsql-tab.png

The load options are displayed below.

../../_images/raster2pgsql-panel.png

Also select if load will be into a new Schema and, in the case of New Table creation, the table name to be created.

Load Options

Database: select the database you wish to load the shape file to.

Load Type: Create, Drop, Append, or Prepare

Set SRID: Defaults to 0 if not set

Database Username: Select the user who will own the data

Schema: Select an existing schema or create a new schema.

Table: Select an existing table or create new one

Raster File Source: Local, Upload, or FTP/HTTP

Load via Comamnd Line

Usage

raster2pgsql usage can be found using the ‘raster2pgsql’ command.

[root@postgis ~]# raster2pgsql
RELEASE: 3.0.1 GDAL_VERSION=30 (ec2a9aa)
USAGE: raster2pgsql [<options>] <raster>[ <raster>[ ...]] [[<schema>.]<table>]
Multiple rasters can also be specified using wildcards (*,?).

OPTIONS:
-s <srid> Set the SRID field. Defaults to 0. If SRID not
  provided or is 0, raster's metadata will be checked to
  determine an appropriate SRID.
-b <band> Index (1-based) of band to extract from raster. For more
   than one band index, separate with comma (,). Ranges can be
   defined by separating with dash (-). If unspecified, all bands
   of raster will be extracted.
-t <tile size> Cut raster into tiles to be inserted one per
   table row. <tile size> is expressed as WIDTHxHEIGHT.
   <tile size> can also be "auto" to allow the loader to compute
   an appropriate tile size using the first raster and applied to
   all rasters.
-P Pad right-most and bottom-most tiles to guarantee that all tiles
  have the same width and height.
-R  Register the raster as an out-of-db (filesystem) raster. Provided
   raster should have absolute path to the file
(-d|a|c|p) These are mutually exclusive options:
  -d  Drops the table, then recreates it and populates
      it with current raster data.
  -a  Appends raster into current table, must be
      exactly the same table schema.
  -c  Creates a new table and populates it, this is the
      default if you do not specify any options.
  -p  Prepare mode, only creates the table.
-f <column> Specify the name of the raster column
-F  Add a column with the filename of the raster.
-n <column> Specify the name of the filename column. Implies -F.
-l <overview factor> Create overview of the raster. For more than
   one factor, separate with comma(,). Overview table name follows
   the pattern o_<overview factor>_<table>. Created overview is
   stored in the database and is not affected by -R.
-q  Wrap PostgreSQL identifiers in quotes.
-I  Create a GIST spatial index on the raster column. The ANALYZE
   command will automatically be issued for the created index.
-M  Run VACUUM ANALYZE on the table of the raster column. Most
   useful when appending raster to existing table with -a.
-C  Set the standard set of constraints on the raster
   column after the rasters are loaded. Some constraints may fail
   if one or more rasters violate the constraint.
-x  Disable setting the max extent constraint. Only applied if
   -C flag is also used.
-r  Set the constraints (spatially unique and coverage tile) for
   regular blocking. Only applied if -C flag is also used.
-T <tablespace> Specify the tablespace for the new table.
   Note that indices (including the primary key) will still use
   the default tablespace unless the -X flag is also used.
-X <tablespace> Specify the tablespace for the table's new index.
   This applies to the primary key and the spatial index if
   the -I flag is used.
-N <nodata> NODATA value to use on bands without a NODATA value.
-k  Skip NODATA value checks for each raster band.
-E <endian> Control endianness of generated binary output of
   raster. Use 0 for XDR and 1 for NDR (default). Only NDR
   is supported at this time.
-V <version> Specify version of output WKB format. Default
   is 0. Only 0 is supported at this time.
-e  Execute each statement individually, do not use a transaction.
-Y  Use COPY statements instead of INSERT statements.
-G  Print the supported GDAL raster formats.
-?  Display this help screen.

Troubleshooting

If the above commands produce ‘raster2pgsql command not found’, close your existing SSH session and create a new one.

Documentation

Below are resources to get started with ogr2ogr and gdal_translate: