diff --git a/vng_api_common/inspectors/__init__.py b/vng_api_common/inspectors/__init__.py
index ce12021e..19cbb793 100644
--- a/vng_api_common/inspectors/__init__.py
+++ b/vng_api_common/inspectors/__init__.py
@@ -4,5 +4,6 @@
     HyperlinkedRelatedFieldExtension,
     ReadOnlyFieldExtension,
 )
+from .geojson import GeometryFieldExtension
 from .polymorphic import PolymorphicSerializerExtension
 from .query import FilterExtension
diff --git a/vng_api_common/inspectors/geojson.py b/vng_api_common/inspectors/geojson.py
new file mode 100644
index 00000000..a6841c2f
--- /dev/null
+++ b/vng_api_common/inspectors/geojson.py
@@ -0,0 +1,302 @@
+from drf_spectacular.extensions import OpenApiSerializerFieldExtension
+from drf_spectacular.plumbing import ResolvedComponent
+from rest_framework_gis.fields import GeometryField
+
+from vng_api_common.oas import TYPE_ARRAY, TYPE_NUMBER, TYPE_OBJECT, TYPE_STRING
+
+
+# TODO: Add response/request headers
+class GeometryFieldExtension(OpenApiSerializerFieldExtension):
+    target_class = GeometryField
+    match_subclasses = True
+
+    def map_serializer_field(self, auto_schema, direction):
+        geometry_component = ResolvedComponent(
+            name="Geometry",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Geometry",
+                "description": "GeoJSON geometry",
+                "type": TYPE_OBJECT,
+                "required": ["type"],
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1",
+                },
+                "properties": {
+                    "type": {
+                        "type": TYPE_STRING,
+                        "enum": [
+                            "Point",
+                            "MultiPoint",
+                            "LineString",
+                            "MultiLineString",
+                            "Polygon",
+                            "MultiPolygon",
+                            "Feature",
+                            "FeatureCollection",
+                            "GeometryCollection",
+                        ],
+                        "description": "The geometry type",
+                    }
+                },
+            },
+            object="Geometry",
+        )
+
+        auto_schema.registry.register_on_missing(geometry_component)
+
+        point2d_component = ResolvedComponent(
+            name="Point2D",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Point2D",
+                "type": TYPE_ARRAY,
+                "items": {
+                    "type": TYPE_NUMBER,
+                },
+                "maxItems": 2,
+                "minItems": 2,
+            },
+            object="Point2D",
+        )
+
+        auto_schema.registry.register_on_missing(geometry_component)
+
+        point_component = ResolvedComponent(
+            name="Point",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Point2D",
+                "description": "GeoJSON point geometry",
+                "type": TYPE_OBJECT,
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1.2",
+                },
+                "allOf": [
+                    geometry_component.ref,
+                    {
+                        "type": TYPE_OBJECT,
+                        "required": ["coordinates"],
+                        "properties": {
+                            "coordinates": point2d_component.ref,
+                        },
+                    },
+                ],
+            },
+            object="Point",
+        )
+
+        auto_schema.registry.register_on_missing(point_component)
+
+        multi_point_component = ResolvedComponent(
+            name="MultiPoint",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "MultiPoint",
+                "description": "GeoJSON multi-point geometry",
+                "type": TYPE_OBJECT,
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1.3",
+                },
+                "allOf": [
+                    geometry_component.ref,
+                    {
+                        "type": TYPE_OBJECT,
+                        "required": ["coordinates"],
+                        "properties": {
+                            "coordinates": {
+                                "type": TYPE_ARRAY,
+                                "items": point2d_component.ref,
+                            },
+                        },
+                    },
+                ],
+            },
+            object="MultiPoint",
+        )
+
+        auto_schema.registry.register_on_missing(multi_point_component)
+
+        line_string_component = ResolvedComponent(
+            name="LineString",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Line-string",
+                "description": "GeoJSON line-string geometry",
+                "type": TYPE_OBJECT,
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1.4",
+                },
+                "allOf": [
+                    geometry_component.ref,
+                    {
+                        "type": TYPE_OBJECT,
+                        "required": ["coordinates"],
+                        "properties": {
+                            "coordinates": {
+                                "type": TYPE_ARRAY,
+                                "items": point2d_component.ref,
+                                "minItems": 2,
+                            },
+                        },
+                    },
+                ],
+            },
+            object="LineString",
+        )
+
+        auto_schema.registry.register_on_missing(line_string_component)
+
+        multi_line_string_component = ResolvedComponent(
+            name="MultiLineString",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Multi-line string",
+                "description": "GeoJSON multi-line-string geometry",
+                "type": TYPE_OBJECT,
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1.5",
+                },
+                "allOf": [
+                    geometry_component.ref,
+                    {
+                        "type": TYPE_OBJECT,
+                        "required": ["coordinates"],
+                        "properties": {
+                            "coordinates": {
+                                "type": TYPE_ARRAY,
+                                "items": {
+                                    "type": TYPE_ARRAY,
+                                    "items": point2d_component.ref,
+                                },
+                            },
+                        },
+                    },
+                ],
+            },
+            object="MultiLineString",
+        )
+
+        auto_schema.registry.register_on_missing(multi_line_string_component)
+
+        polygon_component = ResolvedComponent(
+            name="Polygon",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Polygon",
+                "description": "GeoJSON polygon geometry",
+                "type": TYPE_OBJECT,
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1.6",
+                },
+                "allOf": [
+                    geometry_component.ref,
+                    {
+                        "type": TYPE_OBJECT,
+                        "required": ["coordinates"],
+                        "properties": {
+                            "coordinates": {
+                                "type": TYPE_ARRAY,
+                                "items": {
+                                    "type": TYPE_ARRAY,
+                                    "items": point2d_component.ref,
+                                },
+                            },
+                        },
+                    },
+                ],
+            },
+            object="Polygon",
+        )
+
+        auto_schema.registry.register_on_missing(polygon_component)
+
+        multi_polygon_component = ResolvedComponent(
+            name="MultiPolygon",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Multi-polygon",
+                "description": "GeoJSON multi-polygon geometry",
+                "type": TYPE_OBJECT,
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1.7",
+                },
+                "allOf": [
+                    geometry_component.ref,
+                    {
+                        "type": TYPE_OBJECT,
+                        "required": ["coordinates"],
+                        "properties": {
+                            "coordinates": {
+                                "type": TYPE_ARRAY,
+                                "items": {
+                                    "type": TYPE_ARRAY,
+                                    "items": {
+                                        "type": TYPE_ARRAY,
+                                        "items": point2d_component.ref,
+                                    },
+                                },
+                            },
+                        },
+                    },
+                ],
+            },
+            object="MultiPolygon",
+        )
+
+        auto_schema.registry.register_on_missing(multi_polygon_component)
+
+        geometry_collection_component = ResolvedComponent(
+            name="GeometryCollection",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "Geometry collection",
+                "description": "GeoJSON multi-polygon geometry",
+                "type": TYPE_OBJECT,
+                "externalDocs": {
+                    "url": "https://tools.ietf.org/html/rfc7946#section-3.1.7",
+                },
+                "allOf": [
+                    geometry_component.ref,
+                    {
+                        "type": TYPE_OBJECT,
+                        "required": ["geometries"],
+                        "properties": {
+                            "geometries": {
+                                "type": TYPE_ARRAY,
+                                "items": geometry_component.ref,
+                            },
+                        },
+                    },
+                ],
+            },
+            object="GeometryCollection",
+        )
+
+        auto_schema.registry.register_on_missing(geometry_collection_component)
+
+        root_component = ResolvedComponent(
+            name="GeoJSONGeometry",
+            type=ResolvedComponent.SCHEMA,
+            schema={
+                "title": "GeoJSONGeometry",
+                "type": TYPE_OBJECT,
+                "oneOf": [
+                    point_component.ref,
+                    multi_point_component.ref,
+                    line_string_component.ref,
+                    multi_line_string_component.ref,
+                    polygon_component.ref,
+                    multi_polygon_component.ref,
+                    geometry_collection_component.ref,
+                ],
+                "discriminator": {
+                    "propertyName": "type",
+                },
+            },
+            object="GeoJSONGeometry",
+        )
+
+        auto_schema.registry.register_on_missing(root_component)
+
+        return root_component.ref