OGR_ExportToJSON2

OGR_ExportToJSON2

{
 "metadata": {
  "name": "OGR_ExportToJson"
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "import ogr\nimport gdal\ngdal.VersionInfo()",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "pyout",
       "prompt_number": 18,
       "text": "'1920'"
      }
     ],
     "prompt_number": 18
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "driver = ogr.GetDriverByName('Memory')\ndatasource = driver.CreateDataSource('out')\nlyr = datasource.CreateLayer('layername', geom_type=ogr.wkbMultiPolygon)",
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 2
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "namedef = ogr.FieldDefn('Name', ogr.OFTString)\nnamedef.SetWidth(20)\n\nlyr.CreateField(namedef)\n\nft1 = ogr.Feature( lyr.GetLayerDefn() )\nft2 = ft1.Clone()\nft3 = ft1.Clone()\n\nft1.SetField('Name', 'Test1')\nft2.SetField('Name', 'Test2')\nft3.SetField('Name', 'Test3')\n\nlyr.CreateFeature(ft1)\nlyr.CreateFeature(ft2)\nlyr.CreateFeature(ft3)\n",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "pyout",
       "prompt_number": 3,
       "text": "0"
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": "Note how the first feature (FID=0) is exported without \"id=0\""
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "for ft in lyr:\n    print ft.ExportToJson()",
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": "{\"geometry\": null, \"type\": \"Feature\", \"properties\": {\"Name\": \"Test1\"}}\n{\"geometry\": null, \"type\": \"Feature\", \"properties\": {\"Name\": \"Test2\"}, \"id\": 1}\n{\"geometry\": null, \"type\": \"Feature\", \"properties\": {\"Name\": \"Test3\"}, \"id\": 2}\n"
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": "",
     "language": "python",
     "metadata": {},
     "outputs": []
    }
   ],
   "metadata": {}
  }
 ]
}