dynamic layers and DescribeCoverage requests

[Ara.T.Howard]

hi all-

few newb questions:


1) i'm adding a dynamic layer via mapscript/php using this code:

   $oMap = ms_newMapobj("/data/ut_night_mosaics.map");

   $oLayer = ms_newLayerObj ($oMap);

   $oLayer->set('name', 'foo');

   $oLayer->setProcessing ("SCALE_1=0,63");
   $oLayer->setMetaData ("wcs_description"     , "F152003 11 28 mosaic");
   $oLayer->setMetaData ("wcs_name"            , "mosaic");
   $oLayer->setMetaData ("wcs_label"           , "vis_mosaic");
   $oLayer->setMetaData ("ows_srs"             , "EPSG:4326");
   $oLayer->setMetaData ("ows_extent"          , "-180 -75 180 75");
   $oLayer->setMetaData ("wcs_resolution"      , "0.00833333 -0.00833333");
   $oLayer->setMetaData ("wcs_bandcount"       , "1");
   $oLayer->setMetaData ("wcs_formats"         , "GEOTIFF");
   $oLayer->setMetaData ("wcs_nativeformat"    , "8-bit GeoTIF");
   $oLayer->setMetaData ("wcs_rangeset_name"   , "vis_mosaic");
   $oLayer->setMetaData ("wcs_rangeset_label"  , "vis");
   $oLayer->setMetaData ("wcs_rangeset_axes"   , "bands");
   $oLayer->setMetaData ("wcs_bands_name"      , "bands");
   $oLayer->setMetaData ("wcs_bands_semantic"  , "http://www.ngdc.noaa.gov/dmsp/");
   $oLayer->setMetaData ("wcs_bands_refSys"    , "European Petroleum Survey Group (EPSG)");
   $oLayer->setMetaData ("wcs_bands_label"     , "F152003");
   $oLayer->setMetaData ("wcs_bands_values"    , "VIS");
   $oLayer->set('status', MS_OFF);
   $oLayer->set('dump', MS_TRUE);
   $oLayer->set('data', "F1520061123.nt.d.OIS.vis.mos");
   $oLayer->set('dump', MS_LAYER_RASTER);
   $oLayer->setProjection ("init=epsg:4326");

   $oMap->owsdispatch($request);
   $contenttype = ms_iostripstdoutbuffercontenttype();
   header("Content-Type: $contenttype");
   ms_iogetStdoutBufferBytes();
   ms_ioresethandlers();

this works fine: i can make wcs requests for the 'foo' layer.  however, a
DescribeCoverage request does not seem to pick up on the dynamic layer via
owsdispatch.  what else should i look into doing?


2) there are compile time limits (default 200 i think) in our version of map
server which limit the number of layer in a mapfile, which need to exceed by a
fair bit.  my initial tests seems to show that dyamic layers avoid these
limits.  is this a correct assumption?


3) what's the CamelCase vs snake_case ruls in map script.  eg

     ms_iogetStdoutBufferBytes not ms_iogetstdoutbufferbytes

     ms_iosethandlers not ms_ioSetHandlers

   etc.  does the naming scheme relate to c call mapping? or is it arbitrary?

4) the docs aren't exactly think for wcs related questions.  i'm fine reading
sources instead.  which sources would be reccomended?


kind regards.

-a
-- 
if you find yourself slandering anybody, first imagine that your mouth is
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dalai lama