JSON export from GML

[TomPohys]

JSON export is going to be a conversion of XML (OGC GML) to JSON.

Use: https://github.com/hay/xml2json

like:
python xml2json.py --strip_newlines --strip_text --pretty ~/Downloads/5514.xml
on XML with removed namespaces (e.g. xlink:, epsg: lowercase!, xmlns:.*", gml:)

Example:

{
    "ProjectedCRS": {
        "@id": "ogp-crs-5514",
        "baseGeodeticCRS": {
            "@href": "urn:ogc:def:crs::4156"
        },
        "cartesianCS": {
            "@href": "urn:ogc:def:cs::4499"
        },
        "conversion": {
            "@href": "urn:ogc:def:coordinateOperation::5510"
        },
        "domainOfValidity": {
            "@href": "urn:ogc:def:area::1306"
        },
        "identifier": {
            "#text": "urn:ogc:def:crs::5514",
            "@codeSpace": "OGP"
        },
        "metaDataProperty": {
            "CommonMetaData": {
                "alias": {
                    "@alias": "S-JTSK / Krovak EN (G)",
                    "@code": "17802",
                    "@codeSpace": "urn:ogc:def:naming-system::7302",
                    "remarks": "Uses Greenwich meridian."
                },
                "changes": {
                    "changeID": {
                        "@href": "urn:ogc:def:change-request::2011.039"
                    }
                },
                "informationSource": "Land Survey Office (ZU), Prague. www.cuzk.cz/zu",
                "isDeprecated": "false",
                "revisionDate": "2011-05-09",
                "show": "true",
                "type": "projected"
            }
        },
        "name": "S-JTSK / Krovak East North",
        "remarks": "Greenwich-based alternative to S-JTSK (Ferro) / Krovak East North, CRS code 5221.",
        "scope": "GIS. Due to distortions in survey network introduced after the initial realisation the projection has an inaccuracy of several decimetres."
    }
}

for

<?xml version="1.0" encoding="UTF-8"?>
<gml:ProjectedCRS xmlns:epsg="urn:x-ogp:spec:schema-xsd:EPSG:1.0:dataset"
                  xmlns:gml="http://www.opengis.net/gml/3.2"
                  xmlns:xlink="http://www.w3.org/1999/xlink"
                  gml:id="ogp-crs-5514">
   <gml:metaDataProperty>
      <epsg:CommonMetaData>
         <epsg:type>projected</epsg:type>
         <epsg:alias code="17802" codeSpace="urn:ogc:def:naming-system:EPSG::7302"
                     alias="S-JTSK / Krovak EN (G)">
            <epsg:remarks>Uses Greenwich meridian.</epsg:remarks>
         </epsg:alias>
         <epsg:informationSource>Land Survey Office (ZU), Prague. www.cuzk.cz/zu</epsg:informationSource>
         <epsg:revisionDate>2011-05-09</epsg:revisionDate>
         <epsg:changes>
            <epsg:changeID xlink:href="urn:ogc:def:change-request:EPSG::2011.039"/>
         </epsg:changes>
         <epsg:show>true</epsg:show>
         <epsg:isDeprecated>false</epsg:isDeprecated>
      </epsg:CommonMetaData>
   </gml:metaDataProperty>
   <gml:identifier codeSpace="OGP">urn:ogc:def:crs:EPSG::5514</gml:identifier>
   <gml:name>S-JTSK / Krovak East North</gml:name>
   <gml:remarks>Greenwich-based alternative to S-JTSK (Ferro) / Krovak East North, CRS code 5221.</gml:remarks>
   <gml:domainOfValidity xlink:href="urn:ogc:def:area:EPSG::1306"/>
   <gml:scope>GIS. Due to distortions in survey network introduced after the initial realisation the projection has an inaccuracy of several decimetres.</gml:scope>
   <gml:conversion xlink:href="urn:ogc:def:coordinateOperation:EPSG::5510"/>
   <gml:baseGeodeticCRS xlink:href="urn:ogc:def:crs:EPSG::4156"/>
   <gml:cartesianCS xlink:href="urn:ogc:def:cs:EPSG::4499"/>
</gml:ProjectedCRS>