Simple Image Access version 2.0 Erratum 1: POS=RANGE examples inconsistent with spec

Author: François Bonnarel

Date last changed: 2023-01-24

Date accepted: 2023-04-05


In section 2.1.1, two RANGE examples display RANGE limits with either Inf or -Inf, + Inf. This is inconsistent with the spec which states that RA is in [0, 360] and DEC in [-90,90] and that no RANGE reduction should be required from SIA services implementations.

This bug orignally described on github in SIA issue #5 (

Erratum Content

This Erratum proposes following changes.

Fix RANGE syntax

In §2.1.1 "*POS*" of SIA-2.0,

update the RANGE example for the North Pole from


POS=RANGE 0 360.0 89.0 +Inf


POS=RANGE 0 360.0 89.0 90.0

and fix the RANGE example for the whole sky


POS=RANGE -Inf +Inf -Inf +Inf


POS=RANGE 0 360 -90 +90

Impact Assessment

Fixing the RANGE syntax in an example will make no harm to any service and will avoid application implementers writing code requesting incorrect queries.

Edit | Attach | Watch | Print version | History: r3 < r2 < r1 | Backlinks | Raw View | Raw edit | More topic actions
Topic revision: r3 - 2023-04-05 - JamesDempsey
This site is powered by the TWiki collaboration platform Powered by Perl This site is powered by the TWiki collaboration platformCopyright © 2008-2024 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback