dschach

/**
 * @author https://www.tostring.co.uk/custom-metadata-webservice-client
 * @group Configuration
 */
@SuppressWarnings('PMD.ApexDoc,PMD.FieldNamingConventions,PMD.LocalVariableNamingConventions,PMD.ClassNamingConventions,PMD.ExcessiveParameterList')
public inherited sharing class CustomMetadataClient {
	static public Database.UpsertResult upsertMetadata(SObjectType objectType, Map<SObjectField, Object> record) {
		return upsertMetadata(objectType, new List<Map<SObjectField, Object>>{ record })[0];
	}

dschach

<apex:page StandardController="Contact" showHeader="true" sidebar="false">

<script>
var pos = {};
function success(position) {
  pos = position.coords;
  console.log(pos);
}

function error(msg) {