You ARE a feisty thang these days, aren't you :-) Paul Ramsey wrote: > If he's just buffering one line, he should calculate it by hand, like > a Real Man :) > > On Wed, Feb 11, 2009 at 10:22 AM, Chris Hermansen > <[email protected]> wrote: > >> It might not be that bad, Paul, depending on the latitude of the start >> and end points, which - USA <-> France - sounds like they might be >> pretty close. If it was say Seattle Paris, that would be ok. >> >> Paul Ramsey wrote: >> >>> that's really not a good option. mercator does not preserve >>> length/distance, so the buffer would end up larger at one end than the >>> other, and furthermore would not be the expected width, since it would >>> be built far from the latitude of true scale. >>> >>> P. >>> >>> On Wed, Feb 11, 2009 at 8:52 AM, Pavel Iacovlev >>> <[email protected]> wrote: >>> >>> >>>> As an option you can use google mercator projection for the whole world. >>>> But >>>> read carefully docs about it to understand the precision loss. >>>> >>>> http://genuchten.blogspot.com/2008/04/srid-stuff-in-postgis.html would be a >>>> good start. >>>> >>>> On Wed, Feb 11, 2009 at 6:26 PM, Matthes Rieke <[email protected]> >>>> wrote: >>>> >>>> >>>>> Hi all, >>>>> >>>>> I am currently running into this problem: I have a LineString in lat/long >>>>> coordinates (SRID 4326 - going from USA to france). I now want to create a >>>>> buffer in meters from this. So the normal way to transfrom the coordinates >>>>> to a planar CRS, buffering, then transforming back to 4326 does not work >>>>> (the Line is covering many UTM zones). What would be a reasonable solution >>>>> for this problem? >>>>> >>>>> Thanks and regards, >>>>> Matthes >>>>> >>>>> _______________________________________________ >>>>> postgis-users mailing list >>>>> [email protected] >>>>> http://postgis.refractions.net/mailman/listinfo/postgis-users >>>>> >>>>> >>>>> >>>> -- >>>> http://iap.md, The future is open >>>> >>>> _______________________________________________ >>>> postgis-users mailing list >>>> [email protected] >>>> http://postgis.refractions.net/mailman/listinfo/postgis-users >>>> >>>> >>>> >>>> >>> _______________________________________________ >>> postgis-users mailing list >>> [email protected] >>> http://postgis.refractions.net/mailman/listinfo/postgis-users >>> >>> >> -- >> Regards, >> >> Chris Hermansen mailto:[email protected] >> tel+1.604.714.2878 · fax+1.604.733.0631 · mob+1.778.232.0644 >> Timberline Natural Resource Group · http://www.timberline.ca >> 401 · 958 West 8th Avenue · Vancouver BC · Canada · V5Z 1E5 >> >> _______________________________________________ >> postgis-users mailing list >> [email protected] >> http://postgis.refractions.net/mailman/listinfo/postgis-users >> >> > _______________________________________________ > postgis-users mailing list > [email protected] > http://postgis.refractions.net/mailman/listinfo/postgis-users >
-- Regards, Chris Hermansen mailto:[email protected] tel+1.604.714.2878 · fax+1.604.733.0631 · mob+1.778.232.0644 Timberline Natural Resource Group · http://www.timberline.ca 401 · 958 West 8th Avenue · Vancouver BC · Canada · V5Z 1E5 _______________________________________________ postgis-users mailing list [email protected] http://postgis.refractions.net/mailman/listinfo/postgis-users
