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From "patrick o'leary" <pj...@pjaol.com>
Subject Re: [spatial] Cartesian "Tiers" nomenclature
Date Tue, 29 Dec 2009 01:26:04 GMT
Hmm, depends, tiles indicate to me a direct correlation between the id and a
map tile, which will depend upon using the right projection
with the cartesian plotter

On Mon, Dec 28, 2009 at 2:56 PM, Grant Ingersoll <gsingers@apache.org>wrote:

>
> On Dec 28, 2009, at 4:19 PM, patrick o'leary wrote:
>
> > Hmm, but when you say grid, to me that's just a bunch of regularly spaced
> > lines..
>
> Yeah, I hear you.  I chose spatial tiles for the Solr patch, but spatial
> grid would work too.  Or map tiles/map grids.  That anchors it into the
> spatial world, since we're calling Lucene's spatial contrib/spatial and
> Solr's Solr Spatial.
>
> >
> > On Mon, Dec 28, 2009 at 1:16 PM, Grant Ingersoll <gsingers@apache.org
> >wrote:
> >
> >>
> >> On Dec 28, 2009, at 3:51 PM, patrick o'leary wrote:
> >>
> >>> So Grant here's the deal behind the name.
> >>> Cartesian because it's a simple x.y coordinate system
> >>> Tier because there are multiple tiers, levels of resolution.
> >>>
> >>> If you look at it closer:
> >>> - To programmers there's a quadtree implementation
> >>> - To web users who use maps these are grids / tiles.
> >>> - To GIS experts this is a form of multi-resolution raster-ing.
> >>> - To astrophysicists these are tiers.
> >>> - To the MS folks I've talked to they have quad something or other.
> >>> - To math folks Cartesian levels makes sense.
> >>>
> >>> Can't make all the people happy all the time,
> >>
> >> Right, but as far as I can tell (and I've only done, say an hour of
> >> research), I can't find anyone who calls them Cartesian Tiers other than
> us.
> >>
> >> Personally, I think web users are the largest group (after all, aren't
> we
> >> all web users?) out there and therefore will be the most familiar with
> >> either grid or tile.  FWIW, I have tentatively called the Solr FieldType
> to
> >> support this "SpatialTileField" as in it represents a tile in the
> spatial
> >> sense.  I'd be fine with SpatialGridField as well (GridField seems a bit
> too
> >> generic).
>
>
>

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