NEW add geometrics extrafield (#28239)

* add extrafield point

* wip

* wip

* wip

* input

* input

* output values

* update values

* update values

* update values

* update values

* update values

* wip

* add geomapeditor

* add geomapeditor

* add linestring and polygon

* add linestring and polygon

* add linestring and polygon

* add linestring and polygon

* wip

* wip

* can store and retrieve linestring

* can store and retrieve linestring

* coordinates are inverted

* coordinates are inverted

* add multipoints

* use text instead binary

* auto center map

* wip

wip

* doc

* fix

* wip

* wip

* translation dynamic

---------

Co-authored-by: Laurent Destailleur <eldy@destailleur.fr>

htdocs/includes/geoPHP/lib/geometry/GeometryCollection.class.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * GeometryCollection: A heterogenous collection of geometries
+ */
+class GeometryCollection extends Collection
+{
+	protected $geom_type = 'GeometryCollection';
+
+	// We need to override asArray. Because geometryCollections are heterogeneous
+	// we need to specify which type of geometries they contain. We need to do this
+	// because, for example, there would be no way to tell the difference between a
+	// MultiPoint or a LineString, since they share the same structure (collection
+	// of points). So we need to call out the type explicitly.
+	public function asArray()
+	{
+		$array = array();
+		foreach ($this->components as $component) {
+			$array[] = array(
+			'type' => $component->geometryType(),
+			'components' => $component->asArray(),
+			);
+		}
+		return $array;
+	}
+
+	// Not valid for this geomettry
+	public function boundary()
+	{
+		return null; }
+	public function isSimple()
+	{
+		return null; }
+}