[postgis-users] Raster2pgsql - preserving number of decimal places

[Nick Ward]

Hello,

I'm investigating loading some height data into Postgis as type Raster.
It comes in .asc files and I am using raster2pgsql and psql to load it.

I'm running with PostgreSQL 9.5.2 and POSTGIS="2.2.2 r14797".

I've tried the following raster2pgsql combinations:
raster2pgsql -s 27700 -I -C -M *.asc -F public.test1 > test1.sql
raster2pgsql -I -C -M *.asc -F public. test2 > test2.sql
raster2pgsql -I -M *.asc -F public.test3 > test3.sql

After loading with psql I am querying it with this sql:

SELECT filename, rid, ST_Value(rast, pt.geom) As val
FROM test3 CROSS JOIN (SELECT st_GeomFromText('POINT(454900 254900)', 0) As geom) As pt
WHERE rid in (221,222,223,224);

My problem is that instead of values with 2 decimal places I get 12.
So this query should bring back 145.44 but I get 145.440002441406.

Please could you let me know if there is anything I can do to preserve the correct number of DPs?
Any help and advice would greatly appreciated.

Regards
Nick


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