diff --git a/requirements.txt b/requirements.txt
index 1f2a8398..cceba64b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -66,4 +66,3 @@ werkzeug==3.1.8
     #   flask
     #   flask-cors
 
-opengeodeweb-microservice==1.*,>=1.2.2
diff --git a/src/opengeodeweb_back/routes/blueprint_routes.py b/src/opengeodeweb_back/routes/blueprint_routes.py
index 4c02b6b5..aaa18e19 100644
--- a/src/opengeodeweb_back/routes/blueprint_routes.py
+++ b/src/opengeodeweb_back/routes/blueprint_routes.py
@@ -257,23 +257,42 @@ def extract_valid_attribute_values(
     attribute_name: str,
     item_index: int,
 ) -> tuple[list[float], bool]:
-    attribute_ids_matching_name = attribute_manager.attribute_ids_matching_name(
-        attribute_name
-    )
-    if not isinstance(attribute_ids_matching_name, list):
-        return [], False
-    component_attribute = attribute_manager.find_generic_attribute(
-        attribute_ids_matching_name[0]
-    )
-    if component_attribute is None:
+    attribute_ids = attribute_manager.attribute_ids_matching_name(attribute_name)
+    if not isinstance(attribute_ids, list):
         return [], False
-    if not component_attribute.is_genericable():
+    attribute = attribute_manager.find_generic_attribute(attribute_ids[0])
+    if (
+        attribute is None
+        or not attribute.is_genericable()
+        or not attribute.properties().transferable
+    ):
         return [], False
+
+    nb_items = attribute.nb_items()
+    default_values = getattr(attribute, "default_values", None)
+    no_value = default_values().no_value if default_values else None
+    if no_value is None and (
+        "Point" in attribute.type() or "Vector" in attribute.type()
+    ):
+        no_value = [0.0] * nb_items
+
+    value_getter = getattr(
+        attribute,
+        "value",
+        lambda element_index: [
+            attribute.generic_item_value(element_index, i) for i in range(nb_items)
+        ],
+    )
+
     valid_values: list[float] = []
     has_nan = False
     for element_index in range(attribute_manager.nb_elements()):
-        value = component_attribute.generic_item_value(element_index, item_index)
-        if value is None or math.isnan(value):
+        value = attribute.generic_item_value(element_index, item_index)
+        if (
+            value is None
+            or math.isnan(value)
+            or (no_value is not None and value_getter(element_index) == no_value)
+        ):
             has_nan = True
         else:
             valid_values.append(value)
@@ -293,7 +312,7 @@ def attributes_metadata(
         attribute_name = attribute.name()
         if attribute_name is None:
             continue
-        if not attribute.is_genericable():
+        if not attribute.is_genericable() or not attribute.properties().transferable:
             continue
         nb_items = attribute.nb_items()
         min_values, max_values = [], []
diff --git a/tests/test_routes.py b/tests/test_routes.py
index 7178dd15..fc04c25e 100644
--- a/tests/test_routes.py
+++ b/tests/test_routes.py
@@ -2,6 +2,7 @@
 import os
 
 # Third party imports
+import opengeode as og
 from werkzeug.datastructures import FileStorage
 from flask.testing import FlaskClient
 from werkzeug.test import TestResponse
@@ -13,6 +14,7 @@
 from opengeodeweb_microservice.database.data import Data
 from opengeodeweb_microservice.database.connection import get_session
 from opengeodeweb_back import geode_functions, test_utils
+from opengeodeweb_back.routes.blueprint_routes import extract_valid_attribute_values
 from opengeodeweb_back.geode_objects.geode_polygonal_surface3d import (
     GeodePolygonalSurface3D,
 )
@@ -744,3 +746,47 @@ def get_full_data() -> test_utils.JsonData:
         return {"id": model_id, "component_ids": block_ids}
 
     test_utils.test_route_wrong_params(client, route, get_full_data)
+
+
+def test_extract_valid_attribute_values_with_sentinel_no_value() -> None:
+    mesh = og.TriangulatedSurface3D.create()
+    builder = og.TriangulatedSurfaceBuilder3D.create(mesh)
+    vertex_0 = builder.create_point(og.Point3D([0, 0, 0]))
+    vertex_1 = builder.create_point(og.Point3D([1, 0, 0]))
+    builder.create_triangle([vertex_0, vertex_1, vertex_0])
+
+    attribute_manager = mesh.vertex_attribute_manager()
+    values_config = og.AttributeValuesDouble()
+    values_config.no_value = -999.0
+    attribute_id = attribute_manager.create_attribute_variable_double(
+        "variable_double", values_config, og.AttributeProperties()
+    )
+    attribute = attribute_manager.find_attribute_variable_double(attribute_id)
+    attribute.set_value(vertex_0, -999.0)
+    attribute.set_value(vertex_1, 42.0)
+
+    valid_values, has_nan = extract_valid_attribute_values(
+        attribute_manager, "variable_double", 0
+    )
+    assert has_nan is True
+    assert valid_values == [42.0]
+
+
+def test_extract_valid_attribute_values_with_non_transferable_attribute() -> None:
+    mesh = og.TriangulatedSurface3D.create()
+    builder = og.TriangulatedSurfaceBuilder3D.create(mesh)
+    vertex_0 = builder.create_point(og.Point3D([0, 0, 0]))
+    builder.create_triangle([vertex_0, vertex_0, vertex_0])
+
+    attribute_manager = mesh.vertex_attribute_manager()
+    properties = og.AttributeProperties()
+    properties.transferable = False
+    attribute_manager.create_attribute_variable_double(
+        "internal_attribute", og.AttributeValuesDouble(), properties
+    )
+
+    valid_values, has_nan = extract_valid_attribute_values(
+        attribute_manager, "internal_attribute", 0
+    )
+    assert has_nan is False
+    assert valid_values == []