On Thu, Nov 21, 2019 at 8:06 PM Jody Garnett <[email protected]> wrote:
> Different projects describe a vastly different shape of the world and have > different distortions of scale (often as you move north south). It looks > like the two projections you describe cover the UK and and a large section > of the northern hemisphere respectfully. > The rescaling is done based on the OGC scale denominator, which has simplified formulas, in particular, not taking into account the projection local deformation. On the other side, it can be computed anywhere and it's mandatory for interoperability (see the SLD specification for the method). On the other side, the geometries get the full deformation of the projection, which for the case of 3857 in UK, is already pretty severe (UK area is I believe 3 times bigger than it actually is on web mercator*). The WMS has an option to force a "true scale" computation, see https://docs.geoserver.org/latest/en/user/services/wms/vendor.html#scalemethod You can add it to your requests and see if it fixes the problem, but I'm not sure if it affects the scale denominator used for rule activation, or it gets used all the way through Cheers Andrea *: you can play with https://thetruesize.com/#?borders=1~!MTcyMDU3MzE.NzEyNjY1Mw*MzIzMTM4Nzc(MzA0NjI5OQ~!CONTIGUOUS_US*MTAwMjQwNzU.MjUwMjM1MTc(MTc1)MA~!IN*NTI2NDA1MQ.Nzg2MzQyMQ)MQ~!CN*OTkyMTY5Nw.NzMxNDcwNQ(MjI1)Mg~!GB*NjI4OTc.MTYwMTYwOTQ)Mw , try dragging UK to the equator, where there is almost no deformation == 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 ------------------------------------------------------- *Con riferimento alla normativa sul trattamento dei dati personali (Reg. UE 2016/679 - Regolamento generale sulla protezione dei dati “GDPR”), si precisa che ogni circostanza inerente alla presente email (il suo contenuto, gli eventuali allegati, etc.) è un dato la cui conoscenza è riservata al/i solo/i destinatario/i indicati dallo scrivente. Se il messaggio Le è giunto per errore, è tenuta/o a cancellarlo, ogni altra operazione è illecita. Le sarei comunque grato se potesse darmene notizia. This email is intended only for the person or entity to which it is addressed and may contain information that is privileged, confidential or otherwise protected from disclosure. We remind that - as provided by European Regulation 2016/679 “GDPR” - copying, dissemination or use of this e-mail or the information herein by anyone other than the intended recipient is prohibited. If you have received this email by mistake, please notify us immediately by telephone or e-mail.*
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