{ "items" : [
    { "id" : "http://dbpedia.org/resource/Meridian_arc"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "In geodesy, a meridian arc measurement is the distance between two points with the same longitude, i.e., a segment of a meridian curve or its length. Two or more such determinations at different locations then specify the shape of the  reference ellipsoid which best approximates the shape of the geoid. This process is called the determination of the Figure of the Earth. The earliest determinations of the size of a spherical Earth required a single arc."] } } }
