Re: [gdal-dev] Buffer unit

2013-10-10 Thread Jaak Laineste (Nutiteq)
On 10.10.2013, at 14:06, Iván Sánchez Ortega wrote: > El Jueves, 10 de octubre de 2013 13:16:42 Jaak Laineste escribió: >> Isn't there really better solution than dual-transformation? [...] Good >> solution would be to implement buffer function from latitude/longitude >> directly, say buffer(l

Re: [gdal-dev] Buffer unit

2013-10-10 Thread Iván Sánchez Ortega
El Jueves, 10 de octubre de 2013 13:16:42 Jaak Laineste escribió: > Isn't there really better solution than dual-transformation? [...] Good > solution would be to implement buffer function from latitude/longitude > directly, say buffer(lat,lon,buffer_meters). Any takers? Actually, what you want

Re: [gdal-dev] Buffer unit

2013-10-10 Thread Jukka Rahkonen
Jaak Laineste (Nutiteq nutiteq.com> writes: > Isn't there really better solution than dual-transformation? The problem with this is that you need pick a > projection wisely, and there is no global projection what you can use without having big distortions > nearer to poles (in the case of Merca

Re: [gdal-dev] Buffer unit

2013-10-10 Thread Jaak Laineste (Nutiteq)
On 09.10.2013, at 22:57, Jukka Rahkonen wrote: > Iván Sánchez Ortega sanchezortega.es> writes: > >> >> El Miércoles, 9 de octubre de 2013 07:33:43 Federico Jurio escribió: >>> Dear all, I am using WGS84 (4326) and would like to buffer based on meters >>> and not degrees. [...] >>> Can someone

Re: [gdal-dev] Buffer unit

2013-10-09 Thread Jukka Rahkonen
Iván Sánchez Ortega sanchezortega.es> writes: > > El Miércoles, 9 de octubre de 2013 07:33:43 Federico Jurio escribió: > > Dear all, I am using WGS84 (4326) and would like to buffer based on meters > > and not degrees. [...] > > Can someone please point me in the right direction? > > If you hav

Re: [gdal-dev] Buffer unit

2013-10-09 Thread Iván Sánchez Ortega
El Miércoles, 9 de octubre de 2013 07:33:43 Federico Jurio escribió: > Dear all, I am using WGS84 (4326) and would like to buffer based on meters > and not degrees. [...] > Can someone please point me in the right direction? If you have a working PostGIS instance, you can get your geometries as Po

[gdal-dev] Buffer unit

2013-10-09 Thread Federico Jurio
Dear all, I am using WGS84 (4326) and would like to buffer based on meters and not degrees. I have two possible solutions 1) One minute of Latitude = 1852 Meters So one degree = 60 * 1852 meters = 111,120 meters 2) Project the center to something in meters or feet. Buffer that point. Project the r