GeoServer - GWC Integration & GIF image render
----------------------------------------------
Key: GEOS-4572
URL: http://jira.codehaus.org/browse/GEOS-4572
Project: GeoServer
Issue Type: Bug
Components: GWC, WMS
Affects Versions: 2.1.0
Reporter: Senthilruban Puvanendran
Assignee: Andrea Aime
Currently i'm using getMap service call through GWC-inbuilt Geoserver to cache
the layer on-the-fly. Recently i upgraded to 2.1.0 and giving problem with GIF
image format and found few insteresting findings which i listed below.
The getMap request like below:
http://localhost:8080/geoserver/gwc/service/wms?LAYERS=TEST_LAND_LAYER_GROUP&FORMAT=image%2Fgif&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=19567879.2367,-5009377.0856,19724422.2706,-4852834.0517&WIDTH=256&HEIGHT=256
1) Even though height and width were set to 256, i can see in the geoserver
logs as 1024 and final co-ordinates also changed in the geoserver logs
----------------------------------------------
2011-05-25 13:04:13,637 DEBUG [org.geoserver.wms.map] - setting up 1024x1024
image
2011-05-25 13:04:13,638 DEBUG [org.vfny.geoserver.responses.wms.map] - setting
to transparent
2011-05-25 13:04:19,638 INFO [org.geoserver.wms] -
Request: getMap
Time = null
Filter = null
Buffer = 0
Format = image/gif
Height = 1024
Width = 1024
Filters = null
Exceptions = application/vnd.ogc.se_xml
Styles = [StyleImpl[ name=test_land_block], StyleImpl[
name=test_district_boundary]]
SRS = EPSG:900913
Legend = false
Layers = [org.geoserver.wms.MapLayerInfo@786ee23b,
org.geoserver.wms.MapLayerInfo@efd03da9]
MaxFeatures = null
Bbox = ReferencedEnvelope[1.9411336204375003E7 : 2.003750834E7,
-5009377.085000001 : -4383204.949375]
FormatOptions = {}
Angle = 0.0
CQLFilter = null
Elevation = NaN
FeatureId = null
Palette = null
RemoteOwsType = null
RemoteOwsURL = null
Sld = null
SldBody = null
StartIndex = null
ViewParams = {}
Tiled = false
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"]]
Env = {}
BgColor = java.awt.Color[r=255,g=255,b=255]
Transparent = true
FeatureVersion = null
ValidateSchema = false
SldVersion = null
TilesOrigin = null
KMScore = 40
KMattr = true
Version = 1.1.1
Request = GetMap
Get = true
RawKvp =
{BBOX=1.9411336204375003E7,-5009377.085000001,2.003750834E7,-4383204.949375,
TRANSPARENT=TRUE, EXCEPTIONS=application/vnd.ogc.se_xml, VERSION=1.1.1,
FORMAT=image/gif, SERVICE=WMS, HEIGHT=1024, LAYERS=TEST_LAND_LAYER_GROUP,
REQUEST=GetMap, STYLES=, WIDTH=1024, SRS=EPSG:900913}
BaseUrl = http://localhost:8080/geoserver/
RequestCharset = UTF-8
-------------------------------------------------------
2) However when i changed the request, image format to PNG. it works fine. Due
to PNG format rendering issue with browser, i can not go-ahead with that. Seems
it get affected only for GIF format.
3) When i tried to access directly, not through GWC, It looks fine. but not
transparent image and not cache the images even though checkbox ticked in
"Enable direct WMS integration" (which seems only check whether any cached
image exists, but not create tile cache)
http://localhost:8080/geoserver/wms?LAYERS=TEST_LAND_LAYER_GROUP&FORMAT=image%2Fgif&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A900913&BBOX=19567879.2367,-5009377.0856,19724422.2706,-4852834.0517&WIDTH=256&HEIGHT=256
2011-05-25 13:02:56,304 INFO [org.geoserver.wms] -
Request: getMap
Time = null
Filter = null
Buffer = 0
Format = image/gif
Height = 256
Width = 256
Filters = null
Exceptions = application/vnd.ogc.se_inimage
Styles = [StyleImpl[ name=test_land_block], StyleImpl[
name=test_district_boundary]]
SRS = EPSG:900913
Legend = false
Layers = [org.geoserver.wms.MapLayerInfo@786ee23b,
org.geoserver.wms.MapLayerInfo@efd03da9]
MaxFeatures = null
Bbox = ReferencedEnvelope[1.95678792367E7 : 1.97244222706E7,
-5009377.0856 : -4852834.0517]
FormatOptions = {}
Angle = 0.0
CQLFilter = null
Elevation = NaN
FeatureId = null
Palette = null
RemoteOwsType = null
RemoteOwsURL = null
Sld = null
SldBody = null
StartIndex = null
ViewParams = {}
Tiled = false
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"]]
Env = {}
BgColor = java.awt.Color[r=255,g=255,b=255]
Transparent = false
FeatureVersion = null
ValidateSchema = false
SldVersion = null
TilesOrigin = null
KMScore = 40
KMattr = true
Version = 1.1.1
Request = GetMap
Get = true
RawKvp = {BBOX=19567879.2367,-5009377.0856,19724422.2706,-4852834.0517,
EXCEPTIONS=application/vnd.ogc.se_inimage, VERSION=1.1.1, FORMAT=image/gif,
SERVICE=WMS, HEIGHT=256, REQUEST=GetMap, LAYERS=TEST_LAND_LAYER_GROUP, STYLES=,
SRS=EPSG:900913, WIDTH=256}
BaseUrl = http://localhost:8080/geoserver/
RequestCharset = UTF-8
Based on above observations, I suspect there two issues or i missed few
additional configurations:
1. GIF image tile cache generation broken
2. There are few conversion on parameters when getMap request comes through GWC
to GeoServer
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