Re: [Geoserver-users] EPSG:900913 vs EPSG:3857

SourceForge Headquarters 225 Broadway Suite 1600 San Diego, CA 92101 +1 (858) 454-5900

To be honest I don't know what the hell is going on but it's driving me crazy...

According to what I've searched on the web and in GeoServer's SRS database there're minor differences but seem to be crucial

This the WKT representation of GeoServer's ESPG:900913

PROJCS["WGS84 / Google Mercator", 
  GEOGCS["WGS 84", 
    DATUM["World Geodetic System 1984", 
      SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]], 
      AUTHORITY["EPSG","6326"]], 
    PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]], 
    UNIT["degree", 0.017453292519943295], 
    AXIS["Longitude", EAST], 
    AXIS["Latitude", NORTH], 
    AUTHORITY["EPSG","4326"]], 
  PROJECTION["Mercator_1SP"], 
  PARAMETER["semi_minor", 6378137.0], 
  PARAMETER["latitude_of_origin", 0.0], 
  PARAMETER["central_meridian", 0.0], 
  PARAMETER["scale_factor", 1.0], 
  PARAMETER["false_easting", 0.0], 
  PARAMETER["false_northing", 0.0], 
  UNIT["m", 1.0], 
  AXIS["x", EAST], 
  AXIS["y", NORTH], 
  AUTHORITY["EPSG","900913"]]

And this is the one in spatial reference (http://spatialreference.org/ref/sr-org/6627/html/ )

PROJCS["Google Mercator",
    GEOGCS["WGS 84",
        DATUM["World Geodetic System 1984",
            SPHEROID["WGS 84",6378137.0,298.257223563,
                AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]],
        PRIMEM["Greenwich",0.0,
            AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.017453292519943295],
        AXIS["Geodetic latitude",NORTH],
        AXIS["Geodetic longitude",EAST],
        AUTHORITY["EPSG","4326"]],
    PROJECTION["Mercator_1SP"],
    PARAMETER["semi_minor",6378137.0],
    PARAMETER["latitude_of_origin",0.0],
    PARAMETER["central_meridian",0.0],
    PARAMETER["scale_factor",1.0],
    PARAMETER["false_easting",0.0],
    PARAMETER["false_northing",0.0],
    UNIT["m",1.0],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","900913"]]

As you can see in the AXIS part there're two differences.

Well, I've created in the epsg.properties a new entry called 9999 with the data taken from the web spatialreference , set the declared SRS to my custom CRS, set FORCED TO DECLARED and it works!

 I don't understand anything...

Thanks.

Regards,

Agur bero bat,

David Alda Fernández de Lezea
Área de Sistemas de Información Geográfica, Planificación Territorial y Forestal Informazio Geografikoen Sistemak, Lurralde eta Baso Antolaketaren Arloa.
da...@ha...s | www.hazi.eus
T 945 003 240 – M 627 923 170 – F 945 003 290 
Hazi | Granja Modelo de Arkaute s/n | 01192 Arkaute – Araba

*********************  LEGE OHARRA   *******************   AVISOLEGAL   *******************   DISCLAIMER   *****************************
Mezu hau pertsonala eta isilpekoa da eta baimenik gabeko erabilera debekatua dago legalki. Jasotzailea ez bazara ezabatu mezua, bidali eta kontserbatu gabe.
Este mensaje es personal y confidencial y su uso no autorizado está prohibido legalmente. Si usted no es el destinatario, proceda a borrarlo, sin reenviarlo ni conservarlo.
This message is personal and confidential, unauthorised use is legally prohibited. If you are not the intended recipient, delete it without resending or backing it.

De: and...@gm... [mailto:and...@gm...] En nombre de Andrea Aime
Enviado el: viernes, 12 de febrero de 2016 12:14
Para: David Alda Fernandez de Lezea
CC: GeoServer Users
Asunto: Re: [Geoserver-users] EPSG:900913 vs EPSG:3857

Hi David,
I can confirm the two are identical, the "reprojection console" in GeoServer is giving me back
the identity transform going from one to the other.

Deformed labels sounds strange... are you using GWC with "full wms" enabled, to serve wms
requests out of cached tiles? 
One possible reason for label deformation could be that your requests are not matching up the
cached tiles exactly.

Care to share an example of how the deformed labels look?

Cheers
Andrea

On Fri, Feb 12, 2016 at 11:42 AM, David Alda Fernandez de Lezea <da...@ha...s> wrote:
Hi list,

Does GeoServer treat in the same way these two SRS's?

I'm asking this because I'm working on a GeoNode project, which as you know has GeoServer in the back-end, and I'm having some strange issues (deforming labels) with some data that it's in EPSG:3857. GeoExplorer then publishes them as 900913. In theory they're the same but in practice it seem they're not.

Any hints?

Thanks in advance.

Agur bero bat,

David Alda Fernández de Lezea
Área de Sistemas de Información Geográfica, Planificación Territorial y Forestal Informazio Geografikoen Sistemak, Lurralde eta Baso Antolaketaren Arloa.
da...@ha...s | www.hazi.eus
T 945 003 240 - M 627 923 170 - F 945 003 290
Hazi | Granja Modelo de Arkaute s/n | 01192 Arkaute - Araba

*********************  LEGE OHARRA   *******************   AVISOLEGAL   *******************   DISCLAIMER   *****************************
Mezu hau pertsonala eta isilpekoa da eta baimenik gabeko erabilera debekatua dago legalki. Jasotzailea ez bazara ezabatu mezua, bidali eta kontserbatu gabe.
Este mensaje es personal y confidencial y su uso no autorizado está prohibido legalmente. Si usted no es el destinatario, proceda a borrarlo, sin reenviarlo ni conservarlo.
This message is personal and confidential, unauthorised use is legally prohibited. If you are not the intended recipient, delete it without resending or backing it.

------------------------------------------------------------------------------
Site24x7 APM Insight: Get Deep Visibility into Application Performance
APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month
Monitor end-to-end web transactions and take corrective actions now
Troubleshoot faster and improve end-user experience. Signup Now!
http://pubads.g.doubleclick.net/gampad/clk?id=272487151&iu=/4140
_______________________________________________
Geoserver-users mailing list
Geo...@li...
https://lists.sourceforge.net/lists/listinfo/geoserver-users

-- 
==
GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.
==

Ing. Andrea Aime 
@geowolf
Technical Lead

GeoSolutions S.A.S.
Via di Montramito 3/A
55054  Massarosa (LU)
phone: +39 0584 962313
fax: +39 0584 1660272
mob: +39  339 8844549

http://www.geo-solutions.it
http://twitter.com/geosolutions_it

AVVERTENZE AI SENSI DEL D.Lgs. 196/2003
Le informazioni contenute in questo messaggio di posta elettronica e/o nel/i file/s allegato/i sono da considerarsi strettamente riservate. Il loro utilizzo è consentito esclusivamente al destinatario del messaggio, per le finalità indicate nel messaggio stesso. Qualora riceviate questo messaggio senza esserne il destinatario, Vi preghiamo cortesemente di darcene notizia via e-mail e di procedere alla distruzione del messaggio stesso, cancellandolo dal Vostro sistema. Conservare il messaggio stesso, divulgarlo anche in parte, distribuirlo ad altri soggetti, copiarlo, od utilizzarlo per finalità diverse, costituisce comportamento contrario ai principi dettati dal D.Lgs. 196/2003.

The information in this message and/or attachments, is intended solely for the attention and use of the named addressee(s) and may be confidential or proprietary in nature or covered by the provisions of privacy act (Legislative Decree June, 30 2003, no.196 - Italy's New Data Protection Code).Any use not in accord with its purpose, any disclosure, reproduction, copying, distribution, or either dissemination, either whole or partial, is strictly forbidden except previous formal approval of the named addressee(s). If you are not the intended recipient, please contact immediately the sender by telephone, fax or e-mail and delete the information in this message that has been received in error. The sender does not give any warranty or accept liability as the content, accuracy or completeness of sent messages and accepts no responsibility  for changes made after they were sent or for other risks which arise as a result of e-mail transmission, viruses, etc.

-------------------------------------------------------