I tried to use the Previewer to render my DTED 2 data and output image/bil
format.  I got the error and have no ideas what was wrong.  How do I send
the JAI_IMAGEREAD parameter in the getMap request? 
Request: getMap
        Buffer = 0
        Format = image/bil
        Time = []
        Filters = null
        Filter = null
        Width = 512
        Height = 511
        RemoteOwsType = null
        RemoteOwsURL = null
        SldBody = null
        ValidateSchema = false
        Sld = null
        CQLFilter = null
        FeatureId = null
        SldVersion = null
        StartIndex = null
        FormatOptions = {}
        Env = {}
        Tiled = false
        Palette = null
        Angle = 0.0
        BgColor = java.awt.Color[r=255,g=255,b=255]
        Transparent = false
        FeatureVersion = null
        SRS = EPSG:4326
        Styles = [StyleImpl[ name=raster]]
        Layers = [org.geoserver.wms.MapLayerInfo@1a4ecc76]
        MaxFeatures = null
        ViewParams = null
        Crs = 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["Geodetic longitude", EAST], 
  AXIS["Geodetic latitude", NORTH], 
  AUTHORITY["EPSG","4326"]]
        Bbox = ReferencedEnvelope[-122.00013888888888 : -120.9998611111111,
36.99986111111111 : 38.000138888888884]
        Elevation = []
        TilesOrigin = null
        Exceptions = SE_XML
        Version = 1.1.0
        Request = GetMap
        RawKvp =
{BBOX=-122.00013888888888,36.99986111111111,-120.9998611111111,38.000138888888884,
VERSION=1.1.0, FORMAT=image/bil, SERVICE=WMS, HEIGHT=511, REQUEST=GetMap,
LAYERS=dted:n37_w122_1arc_v1, STYLES=, WIDTH=512, SRS=EPSG:4326}
        BaseUrl = http://172.16.203.30:8080/geoserver/
        Get = true
        RequestCharset = UTF-8
28 Feb 12:14:12 ERROR [geoserver.ows] - 
java.lang.IllegalStateException: Parameter "USE_JAI_IMAGEREAD" is missing.
        at org.geotools.parameter.Parameter.booleanValue(Parameter.java:434)
        at
org.geotools.coverageio.RasterLayerRequest.extractParameter(RasterLayerRequest.java:251)
        at
org.geotools.coverageio.RasterLayerRequest.<init>(RasterLayerRequest.java:205)
        at
org.geotools.coverageio.BaseGridCoverage2DReader.read(BaseGridCoverage2DReader.java:370)
        at
org.gatioeotools.coverage.grid.io.AbstractGridCoverage2DReader.read(AbstractGridCoverage2DReader.java:1

I hope this information is sufficient.  Let me know if you need more
information.
Many thanks in advance

Regards,
Tam



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