gistfile1.txt

{
 "metadata": {
  "name": "",
  "signature": "sha256:f690f121702a4740aa2e624914c793ad75f740d558c89d491eec164062ed4846"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "# Build complex query using CSW OWSLib FES"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "The search on the next line returns 11 records from NODC geoportal (http://www.nodc.noaa.gov/geoportal/):\n",
      "\n",
      "`('roms' OR 'selfe' OR 'adcirc' OR 'ncom' OR 'hycom' OR 'fvcom') AND 'ocean' NOT 'regridded' NOT 'espresso'`\n",
      "\n",
      "How do I do this same request using OWSLib CSW w/ FES?"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "from owslib.csw import CatalogueServiceWeb\n",
      "from owslib import fes"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "search_text = ['roms','selfe','adcirc','ncom','hycom','fvcom']\n",
      "filt=[]\n",
      "for val in search_text:\n",
      "    filt.append(fes.PropertyIsLike(propertyname='apiso:AnyText',literal=('*%s*' % val),\n",
      "                                   escapeChar='\\\\',wildCard='*',singleChar='?'))\n",
      "filter1=fes.Or(filt)\n",
      "\n",
      "val = 'ocean'\n",
      "filter2=fes.PropertyIsLike(propertyname='apiso:AnyText',literal=('*%s*' % val),\n",
      "                        escapeChar='\\\\',wildCard='*',singleChar='?')\n",
      "\n",
      "val = 'regridded'\n",
      "filt=fes.PropertyIsLike(propertyname='apiso:AnyText',literal=('*%s*' % val),\n",
      "                        escapeChar='\\\\',wildCard='*',singleChar='?')\n",
      "filter3 = fes.Not([filt])\n",
      "\n",
      "val = 'espresso'\n",
      "filt=fes.PropertyIsLike(propertyname='apiso:AnyText',literal=('*%s*' % val),\n",
      "                        escapeChar='\\\\',wildCard='*',singleChar='?')\n",
      "filter4 = fes.Not([filt])\n",
      "\n",
      "\n",
      "filter_list = [fes.And([filter1, filter2, filter3, filter4])]"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 2
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "endpoint = 'http://www.nodc.noaa.gov/geoportal/csw'   # NODC/UAF Geoportal: granule level\n",
      "csw = CatalogueServiceWeb(endpoint,timeout=60)\n",
      "print csw.version"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "2.0.2\n"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "csw.getrecords2(constraints=filter_list,maxrecords=1000,esn='full')\n",
      "len(csw.records.keys())"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 4,
       "text": [
        "11"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 4
    }
   ],
   "metadata": {}
  }
 ]
}