diff --git a/client/cdb_dataservices_client--0.20.0--0.21.0.sql b/client/cdb_dataservices_client--0.20.0--0.21.0.sql
index 970c329..495deda 100644
--- a/client/cdb_dataservices_client--0.20.0--0.21.0.sql
+++ b/client/cdb_dataservices_client--0.20.0--0.21.0.sql
@@ -6,3 +6,63 @@
 SET search_path = "$user",cartodb,public,cdb_dataservices_client;
 
 -- HERE goes your code to upgrade/downgrade
+CREATE OR REPLACE FUNCTION cdb_dataservices_client._obs_getavailablegeometries (username text, orgname text, bounds geometry(Geometry, 4326) DEFAULT NULL, filter_tags text[] DEFAULT NULL, numer_id text DEFAULT NULL, denom_id text DEFAULT NULL, timespan text DEFAULT NULL, number_geometries integer DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_client.obs_meta_geometry AS $$
+  CONNECT cdb_dataservices_client._server_conn_str();
+
+  SELECT * FROM cdb_dataservices_server.obs_getavailablegeometries (username, orgname, bounds, filter_tags, numer_id, denom_id, timespan, number_geometries);
+
+$$ LANGUAGE plproxy;
+
+CREATE OR REPLACE FUNCTION cdb_dataservices_client.obs_getavailablegeometries (bounds geometry(Geometry, 4326) DEFAULT NULL ,filter_tags text[] DEFAULT NULL ,numer_id text DEFAULT NULL ,denom_id text DEFAULT NULL ,timespan text DEFAULT NULL ,number_geometries integer DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_client.obs_meta_geometry AS $$
+DECLARE
+
+  username text;
+  orgname text;
+BEGIN
+  IF session_user = 'publicuser' OR session_user ~ 'cartodb_publicuser_*' THEN
+    RAISE EXCEPTION 'The api_key must be provided';
+  END IF;
+  SELECT u, o INTO username, orgname FROM cdb_dataservices_client._cdb_entity_config() AS (u text, o text);
+  -- JSON value stored "" is taken as literal
+  IF username IS NULL OR username = '' OR username = '""' THEN
+    RAISE EXCEPTION 'Username is a mandatory argument, check it out';
+  END IF;
+
+  RETURN QUERY SELECT * FROM cdb_dataservices_client._obs_getavailablegeometries(username, orgname, bounds, filter_tags, numer_id, denom_id, timespan, number_geometries);
+END;
+$$ LANGUAGE 'plpgsql' SECURITY DEFINER;
+
+CREATE OR REPLACE FUNCTION cdb_dataservices_client._obs_getavailablegeometries_exception_safe (bounds geometry(Geometry, 4326) DEFAULT NULL ,filter_tags text[] DEFAULT NULL ,numer_id text DEFAULT NULL ,denom_id text DEFAULT NULL ,timespan text DEFAULT NULL ,number_geometries integer DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_client.obs_meta_geometry AS $$
+DECLARE
+
+  username text;
+  orgname text;
+  _returned_sqlstate TEXT;
+  _message_text TEXT;
+  _pg_exception_context TEXT;
+BEGIN
+  IF session_user = 'publicuser' OR session_user ~ 'cartodb_publicuser_*' THEN
+    RAISE EXCEPTION 'The api_key must be provided';
+  END IF;
+  SELECT u, o INTO username, orgname FROM cdb_dataservices_client._cdb_entity_config() AS (u text, o text);
+  -- JSON value stored "" is taken as literal
+  IF username IS NULL OR username = '' OR username = '""' THEN
+    RAISE EXCEPTION 'Username is a mandatory argument, check it out';
+  END IF;
+
+
+  BEGIN
+    RETURN QUERY SELECT * FROM cdb_dataservices_client._obs_getavailablegeometries(username, orgname, bounds, filter_tags, numer_id, denom_id, timespan, number_geometries);
+  EXCEPTION
+    WHEN OTHERS THEN
+        GET STACKED DIAGNOSTICS _returned_sqlstate = RETURNED_SQLSTATE,
+                                _message_text = MESSAGE_TEXT,
+                                _pg_exception_context = PG_EXCEPTION_CONTEXT;
+        RAISE WARNING USING ERRCODE = _returned_sqlstate, MESSAGE = _message_text, DETAIL = _pg_exception_context;
+
+  END;
+END;
+$$ LANGUAGE 'plpgsql' SECURITY DEFINER;
diff --git a/client/cdb_dataservices_client--0.21.0--0.20.0.sql b/client/cdb_dataservices_client--0.21.0--0.20.0.sql
index 832c80c..55b6f37 100644
--- a/client/cdb_dataservices_client--0.21.0--0.20.0.sql
+++ b/client/cdb_dataservices_client--0.21.0--0.20.0.sql
@@ -6,3 +6,57 @@
 SET search_path = "$user",cartodb,public,cdb_dataservices_client;
 
 -- HERE goes your code to upgrade/downgrade
+CREATE OR REPLACE FUNCTION cdb_dataservices_client._obs_getavailablegeometries (username text, orgname text, bounds geometry(Geometry, 4326) DEFAULT NULL, filter_tags text[] DEFAULT NULL, numer_id text DEFAULT NULL, denom_id text DEFAULT NULL, timespan text DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_client.obs_meta_geometry AS $$
+  CONNECT cdb_dataservices_client._server_conn_str();
+  SELECT * FROM cdb_dataservices_server.obs_getavailablegeometries (username, orgname, bounds, filter_tags, numer_id, denom_id, timespan);
+$$ LANGUAGE plproxy;
+
+CREATE OR REPLACE FUNCTION cdb_dataservices_client.obs_getavailablegeometries (bounds geometry(Geometry, 4326) DEFAULT NULL ,filter_tags text[] DEFAULT NULL ,numer_id text DEFAULT NULL ,denom_id text DEFAULT NULL ,timespan text DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_client.obs_meta_geometry AS $$
+DECLARE
+  username text;
+  orgname text;
+BEGIN
+  IF session_user = 'publicuser' OR session_user ~ 'cartodb_publicuser_*' THEN
+    RAISE EXCEPTION 'The api_key must be provided';
+  END IF;
+  SELECT u, o INTO username, orgname FROM cdb_dataservices_client._cdb_entity_config() AS (u text, o text);
+  -- JSON value stored "" is taken as literal
+  IF username IS NULL OR username = '' OR username = '""' THEN
+    RAISE EXCEPTION 'Username is a mandatory argument, check it out';
+  END IF;
+
+  RETURN QUERY SELECT * FROM cdb_dataservices_client._obs_getavailablegeometries(username, orgname, bounds, filter_tags, numer_id, denom_id, timespan);
+END;
+$$ LANGUAGE 'plpgsql' SECURITY DEFINER;
+
+CREATE OR REPLACE FUNCTION cdb_dataservices_client._obs_getavailablegeometries_exception_safe (bounds geometry(Geometry, 4326) DEFAULT NULL ,filter_tags text[] DEFAULT NULL ,numer_id text DEFAULT NULL ,denom_id text DEFAULT NULL ,timespan text DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_client.obs_meta_geometry AS $$
+DECLARE
+  username text;
+  orgname text;
+  _returned_sqlstate TEXT;
+  _message_text TEXT;
+  _pg_exception_context TEXT;
+BEGIN
+  IF session_user = 'publicuser' OR session_user ~ 'cartodb_publicuser_*' THEN
+    RAISE EXCEPTION 'The api_key must be provided';
+  END IF;
+  SELECT u, o INTO username, orgname FROM cdb_dataservices_client._cdb_entity_config() AS (u text, o text);
+  -- JSON value stored "" is taken as literal
+  IF username IS NULL OR username = '' OR username = '""' THEN
+    RAISE EXCEPTION 'Username is a mandatory argument, check it out';
+  END IF;
+  BEGIN
+    RETURN QUERY SELECT * FROM cdb_dataservices_client._obs_getavailablegeometries(username, orgname, bounds, filter_tags, numer_id, denom_id, timespan);
+  EXCEPTION
+    WHEN OTHERS THEN
+        GET STACKED DIAGNOSTICS _returned_sqlstate = RETURNED_SQLSTATE,
+                                _message_text = MESSAGE_TEXT,
+                                _pg_exception_context = PG_EXCEPTION_CONTEXT;
+        RAISE WARNING USING ERRCODE = _returned_sqlstate, MESSAGE = _message_text, DETAIL = _pg_exception_context;
+  END;
+END;
+$$ LANGUAGE 'plpgsql' SECURITY DEFINER;
+
diff --git a/client/renderer/interface.yaml b/client/renderer/interface.yaml
index 2ee0579..d0a4315 100644
--- a/client/renderer/interface.yaml
+++ b/client/renderer/interface.yaml
@@ -427,6 +427,7 @@
     - { name: numer_id, type: text, default: 'NULL' }
     - { name: denom_id, type: text, default: 'NULL' }
     - { name: timespan, type: text, default: 'NULL'}
+    - { name: number_geometries, type: integer, default: 'NULL'}
 
 - name: obs_getavailabletimespans
   return_type: SETOF cdb_dataservices_client.obs_meta_timespan
diff --git a/server/extension/cdb_dataservices_server--0.27.0--0.28.0.sql b/server/extension/cdb_dataservices_server--0.27.0--0.28.0.sql
index de83786..a83156b 100644
--- a/server/extension/cdb_dataservices_server--0.27.0--0.28.0.sql
+++ b/server/extension/cdb_dataservices_server--0.27.0--0.28.0.sql
@@ -2,4 +2,17 @@
 -- Complain if script is sourced in psql, rather than via CREATE EXTENSION
 \echo Use "ALTER EXTENSION cdb_dataservices_server UPDATE TO '0.28.0'" to load this file. \quit
 
--- HERE goes your code to upgrade/downgrade
\ No newline at end of file
+-- HERE goes your code to upgrade/downgrade
+CREATE OR REPLACE FUNCTION cdb_dataservices_server.OBS_GetAvailableGeometries(
+  username TEXT,
+  orgname TEXT,
+  bounds geometry(Geometry, 4326) DEFAULT NULL,
+  filter_tags TEXT[] DEFAULT NULL,
+  numer_id TEXT DEFAULT NULL,
+  denom_id TEXT DEFAULT NULL,
+  timespan TEXT DEFAULT NULL,
+  number_geometries INTEGER DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_server.obs_meta_geometry AS $$
+  CONNECT cdb_dataservices_server._obs_server_conn_str(username, orgname);
+  SELECT * FROM cdb_observatory.OBS_GetAvailableGeometries(bounds, filter_tags, numer_id, denom_id, timespan, number_geometries);
+$$ LANGUAGE plproxy;
diff --git a/server/extension/cdb_dataservices_server--0.28.0--0.27.0.sql b/server/extension/cdb_dataservices_server--0.28.0--0.27.0.sql
index e99dfb9..aa8b0f0 100644
--- a/server/extension/cdb_dataservices_server--0.28.0--0.27.0.sql
+++ b/server/extension/cdb_dataservices_server--0.28.0--0.27.0.sql
@@ -2,4 +2,16 @@
 -- Complain if script is sourced in psql, rather than via CREATE EXTENSION
 \echo Use "ALTER EXTENSION cdb_dataservices_server UPDATE TO '0.27.0'" to load this file. \quit
 
--- HERE goes your code to upgrade/downgrade
\ No newline at end of file
+-- HERE goes your code to upgrade/downgrade
+CREATE OR REPLACE FUNCTION cdb_dataservices_server.OBS_GetAvailableGeometries(
+  username TEXT,
+  orgname TEXT,
+  bounds geometry(Geometry, 4326) DEFAULT NULL,
+  filter_tags TEXT[] DEFAULT NULL,
+  numer_id TEXT DEFAULT NULL,
+  denom_id TEXT DEFAULT NULL,
+  timespan TEXT DEFAULT NULL)
+RETURNS SETOF cdb_dataservices_server.obs_meta_geometry AS $$
+  CONNECT cdb_dataservices_server._obs_server_conn_str(username, orgname);
+  SELECT * FROM cdb_observatory.OBS_GetAvailableGeometries(bounds, filter_tags, numer_id, denom_id, timespan);
+$$ LANGUAGE plproxy;
diff --git a/server/extension/sql/130_data_observatory_helper.sql b/server/extension/sql/130_data_observatory_helper.sql
index 5711f60..917021b 100644
--- a/server/extension/sql/130_data_observatory_helper.sql
+++ b/server/extension/sql/130_data_observatory_helper.sql
@@ -61,10 +61,11 @@ CREATE OR REPLACE FUNCTION cdb_dataservices_server.OBS_GetAvailableGeometries(
   filter_tags TEXT[] DEFAULT NULL,
   numer_id TEXT DEFAULT NULL,
   denom_id TEXT DEFAULT NULL,
-  timespan TEXT DEFAULT NULL)
+  timespan TEXT DEFAULT NULL,
+  number_geometries INTEGER DEFAULT NULL)
 RETURNS SETOF cdb_dataservices_server.obs_meta_geometry AS $$
   CONNECT cdb_dataservices_server._obs_server_conn_str(username, orgname);
-  SELECT * FROM cdb_observatory.OBS_GetAvailableGeometries(bounds, filter_tags, numer_id, denom_id, timespan);
+  SELECT * FROM cdb_observatory.OBS_GetAvailableGeometries(bounds, filter_tags, numer_id, denom_id, timespan, number_geometries);
 $$ LANGUAGE plproxy;
 
 CREATE TYPE cdb_dataservices_server.obs_meta_timespan AS (timespan_id text, timespan_name text, timespan_description text, timespan_weight text, timespan_aggregate text, timespan_license text, timespan_source text, valid_numer boolean, valid_denom boolean, valid_geom boolean, timespan_type text, timespan_extra jsonb, timespan_tags jsonb);