Arne,
My initial file was in NAD83 projection, re-projected them to "Web Mercator
Auxiliary Sphere" to avoid mis-alignment to google layers and also to avoid
on-the-fly projection. Is this unusual way of doing it?
I am sorry that I have missed that question of yours for featuretype bounds.
Are you referring to WMS Capabilities? If so I am attaching the part of the
capabilities document for a layer. A snippet from that says
"<LatLonBoundingBox minx="-94.493" miny="35.343" maxx="-93.892" maxy="35.765"/>
<BoundingBox SRS="EPSG:900913" minx="-1.051892901E7" miny="4210644.283"
maxx="-1.0452038472E7" maxy="4268301.341"/>"
Thank you once again for replying back on this despite being sick.
Thanks,
Ravi.
________________________________
From: Arne Kepp <[email protected]>
To: Ravi Pavuluri <[email protected]>
Cc: [email protected]
Sent: Wed, January 5, 2011 6:10:17 PM
Subject: Re: [Geoserver-users] Geoserver inbuilt Geowebcache with "Directory of
Spatial Files"
I think I know why, though can't be certain since you didn't respond to my
question about the bounds of the feature type.
Your data is actually stored in EPSG:900913 (a bit unusual), GWC tries to
automatically provide a gridset for the native bounds, but detects a naming
collision and thus creates EPSG:900913_MyWorkspace:MyLayer. It's smarter
about EPSG:4326, but EPSG:900913 just has too many names.
So just ignore that grid set. You don't need it, use the EPSG:900913 one,
which correspond to Google Maps et al.
-Arne
On 1/4/11 8:28 PM, Ravi Pavuluri wrote:
Thank you for your tips Arne. Looking more into this and after adding
a google base layer to the demo, I found the following observation.
>
>Here is my sample blank tile URL, when posted in a browser.
>
>"400: Requested horizontal resolution: 152.8740565429689 , best
>match: 113.62888085937448 exceeds 10% threshold. Perhaps the
>client
>is configured with an incorrect set of scales (resolutions), or
>the
>DPI setting is off compared to the one in GWC ?"
The log file says the same
>ERROR [geowebcache.GeoWebCacheDispatcher] -Requested horizontal
>resolution: 152.8740565429689 , best match: 113.62888085937448
>exceeds
>10% threshold. Perhaps the client is configured with an incorrect
>set
>of scales (resolutions), or the DPI setting is off compared to the
>one
>in GWC ?"
>
>
>The resolutions that are working with WMS layer and google maps are
>resolutions: [156543.03390625, 78271.516953125, 39135.7584765625,
>19567.87923828125, 9783.939619140625, 4891.9698095703125,
>2445.9849047851562, 1222.9924523925781, 611.4962261962891,
>305.74811309814453, 152.87405654907226, 76.43702827453613,
>38.218514137268066, 19.109257068634033, 9.554628534317017,
>4.777314267158508, 2.388657133579254, 1.194328566789627,
>0.5971642833948135, 0.29858214169740677, 0.14929107084870338,
>0.07464553542435169, 0.037322767712175846, 0.018661383856087923,
>
>0.009330691928043961, 0.004665345964021981],
>
>
>The default working GWC resolutions are
>resolutions: [227.25776171874895, 113.62888085937448,
>56.81444042968724, 28.40722021484362, 14.20361010742181,
>7.101805053710905, 3.5509025268554524, 1.7754512634277262,
>0.8877256317138631, 0.44386281585693155, 0.22193140792846577,
>0.11096570396423289, 0.05548285198211644, 0.02774142599105822,
>0.01387071299552911, 0.006935356497764555, 0.0034676782488822777,
>0.0017338391244411389, 8.669195622205694E-4, 4.334597811102847E-4,
>
>2.1672989055514236E-4, 1.0836494527757118E-4, 5.418247263878559E-5,
>2.7091236319392795E-5, 1.3545618159696397E-5]
>
>I could clearly see that resolutions of GWC example do not match to
>that of Geoserver/Openlayers.Any help here? .
>
>Thanks,
>Ravi.
>
>
>
>
>
________________________________
From: Arne Kepp <[email protected]>
>To: ravitheja <[email protected]>
>Cc: [email protected]
>Sent: Tue, January 4, 2011 12:01:08 PM
>Subject: Re: [Geoserver-users] Geoserver inbuilt Geowebcache with
>
>"Directory of Spatial Files"
>
>Not sure.
>
>Just blank tiles usually means that GeoServer rendered an empty
>tile.
>
>Errors on the GWC side usually result in pink tiles (because
>they're
>
>text files, not image files) that you can right click and read.
>
>What are the Lat/Lon bounds of MyLayer according to GS featuretype
>config?
>
>I'm coming down hard with the flu, so here are some general tips:
>1) Change the path in a tile URL from geoserverver/gwc/service/wms
>to
>
>just geoserver/wms , what does the WMS respond with?
>2) Check GeoServer's logfiles for errors?
>
>-Arne
>
>
>
>On 1/4/11 4:58 PM, ravitheja wrote:
>> Hi,
>>
>> I am trying to make use of Geowebcache built with in
>>geoserver(2.0.2) for a
>> directory of shapefiles. I pointed the cache directory to my
>> custom
>>location
>> "without" any custom geowebcache.xml file there.When I use the
>>automatic
>> demos, I get 3 options while seeding for each of the layers.
>>
>> a) EPSG:4326,
>> b) EPSG:900913 (URL structure)
>>http://MyServer/geoserver/gwc/demo/MyWorkspace:MyLayer?gridSet=EPSG:900913&format=image/png
>>g
>>
>> c) EPSG:900913_MyWorkspace:MyLayer. (URL structure)
>>http://MyServer/geoserver/gwc/demo/MyWorkspace:MyLayer?gridSet=EPSG:900913_MyWorkspace:MyLayer&format=image/png
>>g
>>
>> When I preview the layer in the demos page, I could see that a
>> and
>>c work
>> well, but b doesn't work(getting blank tiles). I could see that
>>cache gets
>> created for a and c in my custom location. Anyone has
>> suggestions
>>as to why
>> b doesn't work?
>>
>>
>> My Application:
>> I am testing it using geoext and openlayers for overlaying the
>>"entire
>> datastore layers" with ESPG:900913 and google maps as base
>> layers.
>>I have
>> tried it for a good amount of time and couldn't figure it out. I
>>suspect it
>> is something related to case b.
>>
>> Any help on this is greatly appreciated..
>>
>> Thanks,
>> Ravi.
>
>
>
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>
<Layer queryable="1">
<Name>MyWorkSpace:MyLayerName</Name>
<Title>MyLayerName</Title>
<Abstract/>
<KeywordList/>
<SRS>EPSG:900913</SRS>
<!--WKT definition of this CRS:
PROJCS["WGS84 / Google Mercator",
GEOGCS["WGS 84",
DATUM["World Geodetic System 1984",
SPHEROID["WGS 84", 6378137.0, 298.257223563, AUTHORITY["EPSG","7030"]],
AUTHORITY["EPSG","6326"]],
PRIMEM["Greenwich", 0.0, AUTHORITY["EPSG","8901"]],
UNIT["degree", 0.017453292519943295],
AXIS["Longitude", EAST],
AXIS["Latitude", NORTH],
AUTHORITY["EPSG","4326"]],
PROJECTION["Mercator_1SP"],
PARAMETER["semi_minor", 6378137.0],
PARAMETER["latitude_of_origin", 0.0],
PARAMETER["central_meridian", 0.0],
PARAMETER["scale_factor", 1.0],
PARAMETER["false_easting", 0.0],
PARAMETER["false_northing", 0.0],
UNIT["m", 1.0],
AXIS["x", EAST],
AXIS["y", NORTH],
AUTHORITY["EPSG","900913"]]-->
<LatLonBoundingBox minx="-94.493" miny="35.343" maxx="-93.892"
maxy="35.765"/>
<BoundingBox SRS="EPSG:900913" minx="-1.051892901E7" miny="4210644.283"
maxx="-1.0452038472E7" maxy="4268301.341"/>
<Style>
<Name>SampleStyle</Name>
<Title>Test</Title>
<Abstract>Something here</Abstract>
<LegendURL width="20" height="20">
<Format>image/png</Format>
<OnlineResource xmlns:xlink="http://www.w3.org/1999/xlink";
xlink:type="simple"
xlink:href="http://MyServer/geoserver/wms?request=GetLegendGraphic&format=image%2Fpng&width=20&height=20&layer=MyLayerName"/>
</LegendURL>
</Style>
</Layer>------------------------------------------------------------------------------
Learn how Oracle Real Application Clusters (RAC) One Node allows customers
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