Opened 3 years ago
|Reported by:||hobu||Owned by:||warmerdam|
From: "D'Eramo, Massimo" <Massimo.D'Eramo@garmin.com> Date: April 2, 2012 8:48:42 AM CDT To: "email@example.com" <firstname.lastname@example.org> Subject: Attention Mr. Howard Butler - wrong entry list in Spatialreference.org for Gauss-Boaga Hello Mr. Butler, I apologize if I write you through this address but I couldn’t find a reference mailbox address in Spatialreference.org website. I have found a mistake in Italy Gauss-Boaga East (4686) reference system. The central meridian for this projection is 15° East of Greenwich, while you report 9° East. Now, 9°East of Greenwich is the central meridian for Gauss-Boaga West (4685), so this error brings a very large systemic error if used. System definition for 4686 should therefore be changed as following: PROJCS["unnamed", GEOGCS["International 1909 (Hayford)", DATUM["unknown", SPHEROID["intl",6378388,297]], PRIMEM["Greenwich",0], UNIT["degree",0.0174532925199433]], PROJECTION["Transverse_Mercator"], PARAMETER["latitude_of_origin",0], PARAMETER["central_meridian",15], PARAMETER["scale_factor",0.9996], PARAMETER["false_easting",2520000], PARAMETER["false_northing",0]] I would kindly ask you to correct the issue and confirm to me. Also, I see that both Gauss-Boaga reference systems are classified as “unnamend” in PROJCS field. I would suggest to assign the names of “Gauss-Boaga Ovest” to the West zone (4685) and “Gauss-Boaga Est” for the East zone (4686). These are the most commonly used names for the two systems here in Italy. If you prefer an English naming, simply use “Gauss-Boaga West” and “Gauss-Boaga East”. Italian people will anyway be able to understand it… Thanks in advance Best regards Massimo D’Eramo
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