[Tilecache] Current y value # is too far from tile corner y #

[Paul Ramsey]

Matt, thanks for putting this info on the list, I've already made use of it.

p

On 2/28/08, Matt M <mattm8305 at yahoo.com> wrote:
> Sweet I got it line up right.  Is anyone else if having a similar problem all I did was add the following to epsg projection list file.
>
>  # Google Projection
>  <900913> +proj=merc +a=6378137 +b=6378137 +lat_ts=0.0 +lon_0=0.0 +x_0=0.0 +y_0=0 +k=1.0 +units=m +nadgrids=@null +no_defs
>
>  I then kept the layer projection in the mapfile to:
>
>  PROJECTION
>   "init=EPSG:4326"
>  END
>
>  then added EPSG:900913 to the layer meta data section and the tilecache.cfg file.
>
>  METADATA
>       WMS_TITLE "states_poly"
>       WMS_ABSTRACT "states_poly."
>       WMS_SRS "EPSG:54004 EPSG:900913"
>  END
>
>  tilecache.cfg
>  --------------------
>
> type=MapServer
>  mapfile=/ms4w/Apache/htdocs/example.map
>  layers=states_poly
>
> bbox=-20037508.3427892,-20037508.3427892,20037508.3427892,20037508.3427892
>  maxResolution=156543.0339
>
> srs=EPSG:900913
>  tms_type=google
>
>
>  Thanks!
>
> -Matt
>
>
>  ----- Original Message ----
>  From: Christopher Schmidt <crschmidt at metacarta.com>
>  To: Matt M <mattm8305 at yahoo.com>; tilecache at openlayers.org
>  Sent: Thursday, February 28, 2008 9:49:34 AM
>  Subject: Re: [Tilecache] Current y value # is too far from tile corner y #
>
>
>  On
>  Thu,
>  Feb
>  28,
>  2008
>  at
>  06:35:57AM
>  -0800,
>  Matt
>  M
>  wrote:
>  >
>  Well,
>  that
>  seems
>  to
>  work,
>  however
>  the
>  tiles
>  seems
>  to
>  be
>  misaligned
>  somewhat.
>  >
>  Is
>  there
>  something
>  I'm
>  missing?
>  >
>  >
>  For
>  the
>  getTileUrl()
>  I
>  have
>  the
>  following:
>  >
>  >
>  function
>  (tile,zoom)
>  >
>
>
>  {
>  >
>
>
>
>
>  var
>  url
>  =
>  "http://localhost/cgi-bin/tilecache.cgi/1.0.0/vmap0/";
>  >
>
>
>
>
>  var
>  x
>  =
>  tile.x;
>  >
>
>
>
>
>  var
>  y
>  =
>  tile.y;
>  >
>
>
>
>
>  return
>  url
>  +
>  zoom
>  +
>  "/"
>  +
>  x
>  +
>  "/"
>  +
>  y
>  +
>  ".png";
>  >
>
>
>
>
>  >
>
>
>  }
>  >
>  >
>  tilecache.cfg
>  >
>  ------------------
>  >
>  [vmap0]
>  >
>  type=MapServer
>  >
>  mapfile=/ms4w/Apache/htdocs/example.map
>  >
>  layers=states_poly,states_line
>  >
>  bbox=-20037508.3427892,-20037508.3427892,20037508.3427892,20037508.3427892
>  >
>  maxResolution=156543.0339
>  >
>  srs=EPSG:54004
>  >
>  tms_type=google
>
>  Well,
>  I'm
>  guessing
>  that
>  you're
>  using
>  the
>  wrong
>  projection,
>  since
>  "EPSG:54004"
>  is
>  usually
>  associated
>  with
>  the
>  standard
>  'mercator'
>  projection:
>  the
>  proj4
>  string
>  you
>  want
>  is
>  more
>  typically
>  associated
>  with
>  EPSG:900913,
>  and
>  is
>  described
>  at
>  http://trac.openlayers.org/wiki/SphericalMercator
>  .
>  (If
>  you're
>  using
>  a
>  recent
>  version
>  of
>  TileCache,
>  this
>  should
>  have
>  been
>  described
>  in
>  the
>  tilecache.cfg
>  in
>  the
>  'Google
>  Projection'
>  comments.)
>
>  Regards,
>  --
>  Christopher
>  Schmidt
>  MetaCarta
>
>
>
>
>
>
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