diff --git a/Tracking/Acts/ActsEDM/ActsEDM/ATLAS_CHECK_THREAD_SAFETY b/Tracking/Acts/ActsEDM/ActsEDM/ATLAS_CHECK_THREAD_SAFETY
new file mode 100644
index 0000000000000000000000000000000000000000..5aab7dc0ffc31e18f76cfe4315dd56c1d807b6e4
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/ActsEDM/ATLAS_CHECK_THREAD_SAFETY
@@ -0,0 +1 @@
+Tracking/Acts/ActsEDM
\ No newline at end of file
diff --git a/Tracking/Acts/ActsEDM/ActsEDM/ActsEDMDict.h b/Tracking/Acts/ActsEDM/ActsEDM/ActsEDMDict.h
new file mode 100644
index 0000000000000000000000000000000000000000..084eca15c32897102ac5bf228ca386c63a471b06
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/ActsEDM/ActsEDMDict.h
@@ -0,0 +1,43 @@
+// Dear emacs, this is -*- c++ -*-
+
+/*
+ Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+*/
+
+#ifndef ACTSEDM_DICT_H
+#define ACTSEDM_DICT_H 1
+
+#include "AthLinks/DataLink.h"
+#include "AthLinks/ElementLink.h"
+
+#define INSTANTIATE_TYPES( NS, TYPE ) \
+ NS::TYPE dummy_##NS##_##TYPE##_1; \
+ DataLink< NS::TYPE > dummy_##NS##_##TYPE##_2; \
+ std::vector< DataLink< NS::TYPE > > dummy_##NS##_##TYPE##_3;
+
+#define INSTANTIATE_CONTAINER_TYPES( NS, TYPE ) \
+ NS::TYPE dummy_##NS##_##TYPE##_1; \
+ DataLink< NS::TYPE > dummy_##NS##_##TYPE##_2; \
+ ElementLink< NS::TYPE > dummy_##NS##_##TYPE##_3; \
+ std::vector< DataLink< NS::TYPE > > dummy_##NS##_##TYPE##_4; \
+ std::vector< ElementLink< NS::TYPE > > dummy_##NS##_##TYPE##_5; \
+ std::vector< std::vector< ElementLink< NS::TYPE > > > \
+ dummy_##NS##_##TYPE##_6;
+
+#include "ActsEDM/ActsMeasurement.h"
+#include "ActsEDM/ActsSpacePointData.h"
+#include "ActsEDM/ActsSpacePoint.h"
+#include "ActsEDM/ActsSeed.h"
+
+// Instantiate all necessary types for the dictionary.
+namespace {
+ struct GCCXML_DUMMY_INSTANTIATION_ACTSEDM {
+ INSTANTIATE_TYPES( ActsTrk, SpacePointData )
+ INSTANTIATE_CONTAINER_TYPES( ActsTrk, MeasurementContainer )
+ INSTANTIATE_CONTAINER_TYPES( ActsTrk, SpacePointContainer )
+ INSTANTIATE_CONTAINER_TYPES( ActsTrk, SeedContainer )
+ };
+}
+
+
+#endif
diff --git a/Tracking/Acts/ActsEDM/ActsEDM/ActsMeasurement.h b/Tracking/Acts/ActsEDM/ActsEDM/ActsMeasurement.h
new file mode 100644
index 0000000000000000000000000000000000000000..ccdbc3a5aa36f29c2f8af751fee2dfa2b7271c2e
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/ActsEDM/ActsMeasurement.h
@@ -0,0 +1,26 @@
+// Dear emacs, this is -*- c++ -*-
+
+/*
+ Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+*/
+
+#ifndef ACTSEDM_MEASUREMENT_H
+#define ACTSEDM_MEASUREMENT_H 1
+
+#include "Acts/EventData/Measurement.hpp"
+#include "ActsGeometry/ATLASSourceLink.h"
+
+#include "AthContainers/DataVector.h"
+
+namespace ActsTrk {
+ typedef Acts::BoundVariantMeasurement< ATLASSourceLink > Measurement;
+ typedef DataVector< Acts::BoundVariantMeasurement< ATLASSourceLink > > MeasurementContainer;
+}
+
+// Set up a CLID for the type:
+#include "AthenaKernel/CLASS_DEF.h"
+CLASS_DEF( ActsTrk::Measurement, 207128991, 1 )
+CLASS_DEF( ActsTrk::MeasurementContainer, 1261318992, 1)
+
+#endif
+
diff --git a/Tracking/Acts/ActsEDM/ActsEDM/ActsSeed.h b/Tracking/Acts/ActsEDM/ActsEDM/ActsSeed.h
new file mode 100644
index 0000000000000000000000000000000000000000..89eb8a4d529fc80cc65baf5ad6e10af4ec60d024
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/ActsEDM/ActsSeed.h
@@ -0,0 +1,25 @@
+// Dear emacs, this is -*- c++ -*-
+
+/*
+ Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+*/
+
+#ifndef ACTSEDM_SEED_H
+#define ACTSEDM_SEED_H 1
+
+#include "Acts/Seeding/Seed.hpp"
+#include "ActsEDM/ActsSpacePoint.h"
+
+#include "AthContainers/DataVector.h"
+
+namespace ActsTrk {
+ typedef Acts::Seed< ActsTrk::SpacePoint > Seed;
+ typedef DataVector< Acts::Seed< ActsTrk::SpacePoint > > SeedContainer;
+}
+
+// Set up a CLID for the type:
+#include "AthenaKernel/CLASS_DEF.h"
+CLASS_DEF( ActsTrk::Seed, 207128231, 1 )
+CLASS_DEF( ActsTrk::SeedContainer, 1261318102, 1)
+
+#endif
diff --git a/Tracking/Acts/ActsEDM/ActsEDM/ActsSpacePoint.h b/Tracking/Acts/ActsEDM/ActsEDM/ActsSpacePoint.h
new file mode 100644
index 0000000000000000000000000000000000000000..0618f4a53a514c29132fa83e7ee4c2554c2c07bb
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/ActsEDM/ActsSpacePoint.h
@@ -0,0 +1,72 @@
+// Dear emacs, this is -*- c++ -*-
+
+/*
+ Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+*/
+
+#ifndef ACTSEDM_SPACEPOINT_H
+#define ACTSEDM_SPACEPOINT_H 1
+
+#include "ActsEDM/ActsSpacePointData.h"
+
+namespace ActsTrk {
+
+ class SpacePoint {
+ public:
+ SpacePoint() = delete;
+ template <typename position_t, typename variance_t>
+ SpacePoint(const Eigen::MatrixBase<position_t>& pos,
+ const Eigen::MatrixBase<variance_t>& var,
+ SpacePointData& data,
+ std::size_t measIndex);
+
+
+ inline double x() const;
+ inline double y() const;
+ inline double z() const;
+ inline double varianceR() const;
+ inline double varianceZ() const;
+
+ inline std::size_t measurementIndex() const;
+
+ private:
+ std::size_t m_index;
+ std::size_t m_measurementIndex;
+ SpacePointData* m_data;
+ };
+
+ template <typename position_t, typename variance_t>
+ SpacePoint::SpacePoint(const Eigen::MatrixBase<position_t>& pos,
+ const Eigen::MatrixBase<variance_t>& var,
+ SpacePointData& data,
+ std::size_t measIndex)
+ : m_measurementIndex(measIndex),
+ m_data(&data)
+ {
+ EIGEN_STATIC_ASSERT_VECTOR_SPECIFIC_SIZE(position_t, 3);
+ EIGEN_STATIC_ASSERT_VECTOR_SPECIFIC_SIZE(variance_t, 2);
+
+ m_index = m_data->insert(pos,var);
+ }
+
+ inline double SpacePoint::x() const { return m_data->x(m_index); }
+ inline double SpacePoint::y() const { return m_data->y(m_index); }
+ inline double SpacePoint::z() const { return m_data->z(m_index); }
+ inline double SpacePoint::varianceR() const { return m_data->varianceR(m_index); }
+ inline double SpacePoint::varianceZ() const { return m_data->varianceZ(m_index); }
+
+ std::size_t SpacePoint::measurementIndex() const { return m_measurementIndex; }
+} // Acts namespace
+
+#include "AthContainers/DataVector.h"
+namespace ActsTrk {
+ typedef DataVector< ActsTrk::SpacePoint > SpacePointContainer;
+}
+
+// Set up a CLID for the type:
+#include "AthenaKernel/CLASS_DEF.h"
+CLASS_DEF( ActsTrk::SpacePoint, 207128531, 1 )
+CLASS_DEF( ActsTrk::SpacePointContainer, 1262318102, 1)
+
+#endif
+
diff --git a/Tracking/Acts/ActsEDM/ActsEDM/ActsSpacePointData.h b/Tracking/Acts/ActsEDM/ActsEDM/ActsSpacePointData.h
new file mode 100644
index 0000000000000000000000000000000000000000..76e435d98b31f96352d92eccbcd22144defe6880
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/ActsEDM/ActsSpacePointData.h
@@ -0,0 +1,53 @@
+// Dear emacs, this is -*- c++ -*-
+
+/*
+ Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+*/
+
+#ifndef ACTSEDM_SPACEPOINTDATA_H
+#define ACTSEDM_SPACEPOINTDATA_H 1
+
+#include <vector>
+#include "Acts/Definitions/Algebra.hpp"
+
+namespace ActsTrk {
+
+ class SpacePointData {
+ public:
+ SpacePointData() = default;
+ SpacePointData(const SpacePointData&) = delete;
+ ~SpacePointData() = default;
+
+ inline double x(std::size_t n) const;
+ inline double y(std::size_t n) const;
+ inline double z(std::size_t n) const;
+ inline double varianceR(std::size_t n) const;
+ inline double varianceZ(std::size_t n) const;
+
+ std::size_t insert(const Acts::Vector3& position,
+ const Acts::Vector2& variance);
+
+ void reserve(std::size_t n);
+
+ private:
+ std::vector< double > m_pos_x;
+ std::vector< double > m_pos_y;
+ std::vector< double > m_pos_z;
+ std::vector< double > m_cov_r;
+ std::vector< double > m_cov_z;
+ };
+
+ inline double SpacePointData::x(std::size_t n) const { return m_pos_x.at(n); }
+ inline double SpacePointData::y(std::size_t n) const { return m_pos_y.at(n); }
+ inline double SpacePointData::z(std::size_t n) const { return m_pos_z.at(n); }
+ inline double SpacePointData::varianceR(std::size_t n) const { return m_cov_r.at(n); }
+ inline double SpacePointData::varianceZ(std::size_t n) const { return m_cov_z.at(n); }
+
+} // Acts namespace
+
+
+// Set up a CLID for the type:
+#include "AthenaKernel/CLASS_DEF.h"
+CLASS_DEF( ActsTrk::SpacePointData, 207128530, 1 )
+
+#endif
diff --git a/Tracking/Acts/ActsEDM/ActsEDM/selection.xml b/Tracking/Acts/ActsEDM/ActsEDM/selection.xml
new file mode 100644
index 0000000000000000000000000000000000000000..088311eb56824d16c971be6fcbd38cc188018d5f
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/ActsEDM/selection.xml
@@ -0,0 +1,20 @@
+<!-- Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration -->
+<lcgdict>
+
+ <class name="Measurement" />
+ <class name="MeasurementContainer"
+ id="982AECB9-B116-44E0-A7C6-88939B01B050" />
+
+ <class name="SpacePointData"
+ id="E3B251F4-6D90-489E-98F8-2C7B73EA4700" />
+
+ <class name="SpacePoint" />
+ <class name="SpacePointContainer"
+ id="9ED9A88B-E81E-46B2-9371-33122EAF9B4D" />
+
+ <class name="Seed" />
+ <class name="SeedContainer"
+ id="936BD24D-A0FE-4684-9C95-6C895E38B56E" />
+
+</lcgdict>
+
diff --git a/Tracking/Acts/ActsEDM/CMakeLists.txt b/Tracking/Acts/ActsEDM/CMakeLists.txt
new file mode 100644
index 0000000000000000000000000000000000000000..42b8dd61949804f2abd5a1b296128a9c2d6abf40
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/CMakeLists.txt
@@ -0,0 +1,34 @@
+# Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+
+# Declare the package name:
+atlas_subdir( ActsEDM )
+
+# External dependencies:
+find_package( Acts COMPONENTS Core )
+find_package( Boost )
+find_package( Eigen )
+
+atlas_add_library( ActsEDM
+ Root/*.cxx
+ PUBLIC_HEADERS ActsEDM
+ LINK_LIBRARIES ${Boost_LIBRARIES} ${EIGEN_LIBRARIES}
+ AthenaBaseComps GaudiKernel AtlasDetDescr CxxUtils
+ xAODCore ActsCore ActsFatras ActsGeometryLib BeamSpotConditionsData
+ MagFieldConditions MagFieldElements SiSPSeededTrackFinderData InDetRawData GeoPrimitives InDetPrepRawData
+ )
+
+atlas_add_dictionary( ActsEDMDict
+ ActsEDM/ActsEDMDict.h
+ ActsEDM/selection.xml
+ LINK_LIBRARIES xAODCore ActsEDM
+ DATA_LINKS
+ ActsTrk::MeasurementContainer
+ ActsTrk::SpacePointData
+ ActsTrk::SpacePointContainer
+ ActsTrk::SeedContainer
+ )
+
+
+
+
+
diff --git a/Tracking/Acts/ActsEDM/Root/ActsSpacePointData.cxx b/Tracking/Acts/ActsEDM/Root/ActsSpacePointData.cxx
new file mode 100644
index 0000000000000000000000000000000000000000..024251002aa041e27d69a8456f367269a2b235e0
--- /dev/null
+++ b/Tracking/Acts/ActsEDM/Root/ActsSpacePointData.cxx
@@ -0,0 +1,33 @@
+// Dear emacs, this is -*- c++ -*-
+
+/*
+ Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+*/
+
+#include "ActsEDM/ActsSpacePointData.h"
+
+namespace ActsTrk {
+ std::size_t SpacePointData::insert(const Acts::Vector3& position,
+ const Acts::Vector2& variance) {
+ std::size_t index = m_pos_x.size();
+ // position
+ m_pos_x.push_back( position[0] );
+ m_pos_y.push_back( position[1] );
+ m_pos_z.push_back( position[2] );
+ // Variance
+ m_cov_r.push_back( variance[0] );
+ m_cov_z.push_back( variance[1] );
+ // return index where values have been saved
+ return index;
+ }
+
+ void SpacePointData::reserve(std::size_t n) {
+ m_pos_x.reserve(n);
+ m_pos_y.reserve(n);
+ m_pos_z.reserve(n);
+ m_cov_r.reserve(n);
+ m_cov_z.reserve(n);
+ }
+
+} // ActsTrk namespace
+