On 2/6/07, Mark Stosberg <[EMAIL PROTECTED]> wrote:
It's also notable that the units used are meters, not miles like
geo_distance(). That's what the magic number of "16093.44" is-- 10 miles
converted to meters.
When I benchmarked this query against the old geo_distance() variation,
it was about
On Mon, Feb 05, 2007 at 18:01:05 -0500,
Mark Stosberg <[EMAIL PROTECTED]> wrote:
>
> It's also notable that the units used are meters, not miles like
> geo_distance(). That's what the magic number of "16093.44" is-- 10 miles
> converted to meters.
You can change the earth() function in earthdis
Merlin Moncure wrote:
> On 2/5/07, Mark Stosberg <[EMAIL PROTECTED]> wrote:
>> Bruno Wolff III wrote:
>> > On Sat, Feb 03, 2007 at 14:00:26 -0500,
>> > Mark Stosberg <[EMAIL PROTECTED]> wrote:
>> >> I'm using geo_distance() from contrib/earthdistance would like to
>> find a
>> >> way to spend up
On Mon, Feb 05, 2007 at 14:47:25 -0500,
Mark Stosberg <[EMAIL PROTECTED]> wrote:
>
> This is also interesting. Is this approach practical if I want to index
> what's near each of about 40,000 US zipcodes, or the approach mostly
> useful if you there are just a small number of fixed points to add
On 2/5/07, Mark Stosberg <[EMAIL PROTECTED]> wrote:
Bruno Wolff III wrote:
> On Sat, Feb 03, 2007 at 14:00:26 -0500,
> Mark Stosberg <[EMAIL PROTECTED]> wrote:
>> I'm using geo_distance() from contrib/earthdistance would like to find a
>> way to spend up the geo distance calculation if possible
Bruno Wolff III wrote:
> On Sat, Feb 03, 2007 at 14:00:26 -0500,
> Mark Stosberg <[EMAIL PROTECTED]> wrote:
>> I'm using geo_distance() from contrib/earthdistance would like to find a
>> way to spend up the geo distance calculation if possible. This is for a
>> proximity search: "Show me adoptabl
On Sat, Feb 03, 2007 at 14:00:26 -0500,
Mark Stosberg <[EMAIL PROTECTED]> wrote:
>
> I'm using geo_distance() from contrib/earthdistance would like to find a
> way to spend up the geo distance calculation if possible. This is for a
> proximity search: "Show me adoptable pets within 250 miles of
Mark,
in astronomy we extensively use such kind of query, which we call
radial search or conesearch. There are several algorithms which perform
efficiently such query using spherical coordinates.
Specifically, we use our Q3C algorithm, see
http://www.sai.msu.su/~megera/wiki/SkyPixelization for
Hello,
I'm using geo_distance() from contrib/earthdistance would like to find a
way to spend up the geo distance calculation if possible. This is for a
proximity search: "Show me adoptable pets within 250 miles of this
zipcode".
I'm researched a number of approaches to this, but none seem as wor
