I'm glad you sorted it - I will find some time soon for the wiki page. The reason I suggested the dev list is that I know quite a few people do not subscribe to talk any more - your questions would not be out of place there, but it is up to you!
Regards Graham. On 9 August 2011 09:49, kenneth gonsalves <law...@thenilgiris.com> wrote: > On Mon, 2011-08-08 at 07:34 +0100, Graham Jones wrote: > > These questions might get a better response on the Dev list as they > > are quite technical. > > but it is an end user question - I would not like to waste the time of > the devs. > > > I am not very good at postgis so I may be wrong, but you might be > > comparing two identical points (way and way). The postgis manual > > seems to do select. ... AS.. for each side of the comparison. > > You could check this by using the coordinates of bangalore explicitly > > rather than getting them from the database. > > actually as Frederik pointed out the error was that the measurement has > to be in degrees and not metres as I had assumed. It works like a > charm. > > > > I quite fancy starting a tips and tricks wiki page for this sort of > > thing if you would like to ass the solution when you find it. > > Here it is (I am quite proud of the fact that I could do it with my > rudimentary knowledge of sql - it only took 4 days to write it): > > select p.name, > f.lat*.0000001 as lat, > f.lon*.0000001 as lon > from > planet_osm_point p, > planet_osm_nodes f > where > (p.place != 'city') > and > ST_DWithin(p.way, > (select way from planet_osm_point where name like '%Mysuru%' limit > 1),.15) > and > p.osm_id = f.id > order by p.name; > > This selects all places within .15 degrees of Mysuru. > > -- Graham Jones Hartlepool, UK.
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