All,
I'm having problems with GeoWebCache, I have a Leaflet.js web mapping site
using Proj4Leaflet which consumes 2 WMS feeds from Geoserver (2.3.3), both are
Layer Groups (one base mapping the other is data) and everything displays fine
when I'm not using GWC.
When I enable caching on the base mapping Layer Group I get two different
results at different zoom levels:
1. At zoom levels 5, 6, 8 & 9: I get "geowebcache-cache-result: HIT".
However the images are misaligned/offset to the non-cached layers
2. At zoom levels 7, 10, 11, 12, 13 & 14: I get
"geowebcache-cache-result: MISS" and "geowebcache-miss-reason: request does not
align to grid(s) 'Ordnance_Survey_National_Grid'". Because the cache isn't
used the layers align correctly
I have created a custom Gridset for this and it is British National Grid,
EPSG:27700 (full specification at the foot of the email).
I'm really confused as the resolutions that I've defined in my web app exactly
match the Gridset below and I can't work out if I've got a problem with the
Gridset or something in the Leaflet code.
If anyone could shed any light on this matter or point me in the right
direction to troubleshoot it I'd greatly appreciate it. Please let me know if
any further information is required.
Kind regards,
Rob
<gridSet>
<name>Ordnance_Survey_National_Grid</name>
<srs>
<number>27700</number>
</srs>
<extent>
<coords>
<double>1346.748175220855</double>
<double>7097.996956234318</double>
<double>671066.5126380573</double>
<double>1230202.1293903186</double>
</coords>
</extent>
<alignTopLeft>false</alignTopLeft>
<resolutions>
<double>5600.0</double>
<double>2800.0</double>
<double>1400.0</double>
<double>700.0</double>
<double>350.0</double>
<double>175.0</double>
<double>84.0</double>
<double>42.0</double>
<double>21.0</double>
<double>11.2</double>
<double>5.6</double>
<double>2.8</double>
<double>1.4</double>
<double>0.7</double>
<double>0.35</double>
<double>0.14</double>
<double>0.07</double>
</resolutions>
<metersPerUnit>1.0</metersPerUnit>
<pixelSize>2.8E-4</pixelSize>
<scaleNames>
<string>Ordnance Survey National Grid:0</string>
<string>Ordnance Survey National Grid:1</string>
<string>Ordnance Survey National Grid:2</string>
<string>Ordnance Survey National Grid:3</string>
<string>Ordnance Survey National Grid:4</string>
<string>Ordnance Survey National Grid:5</string>
<string>Ordnance Survey National Grid:6</string>
<string>Ordnance Survey National Grid:7</string>
<string>Ordnance Survey National Grid:8</string>
<string>Ordnance Survey National Grid:9</string>
<string>Ordnance Survey National Grid:10</string>
<string>Ordnance Survey National Grid:11</string>
<string>Ordnance Survey National Grid:12</string>
<string>Ordnance Survey National Grid:13</string>
<string>Ordnance Survey National Grid:14</string>
<string>Ordnance Survey National Grid:15</string>
<string>Ordnance Survey National Grid:16</string>
</scaleNames>
<tileHeight>256</tileHeight>
<tileWidth>256</tileWidth>
<yCoordinateFirst>false</yCoordinateFirst>
</gridSet>
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