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diff --git a/src/include/rba/RBABasePoint.hpp b/src/include/rba/RBABasePoint.hpp
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+++ b/src/include/rba/RBABasePoint.hpp
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+// Copyright (c) 2018 DENSO CORPORATION. All rights reserved.
+/**
+ * Base point class
+ */
+
+#ifndef RBABASEPOINT_HPP
+#define RBABASEPOINT_HPP
+
+namespace rba
+{
+
+/**
+ * @enum RBABasePoint
+ * Base point for object having size. For example Area.
+ */
+enum class RBABasePoint : std::uint8_t
+{
+  /**
+   * @brief Defines Left-Top coordinate as the base point of (x, y)
+   * The rectangle is represented by (x, y)-(x+width, y+height)
+   */
+  LEFT_TOP,
+
+  /**
+   * @brief Defines Left-Middle coordinate as the base point of (x, y)
+   * The rectangle is represented by (x, y-height/2)-(x+width, y+height/2)
+   */
+  LEFT_MIDDLE,
+
+  /**
+   * @brief Defines Left-Bottom coordinate as the base point of (x, y)
+   * The rectangle is represented by (x, y-height)-(x+width, y)
+   */
+  LEFT_BOTTOM,
+
+  /**
+   * @brief Defines Right-Top coordinate as the base point of (x, y)
+   * The rectangle is represented by (x-width, y)-(x, y+height)
+   */
+  RIGHT_TOP,
+
+  /**
+   * @brief Defines Right-Middle coordinate as the base point of (x, y)
+   * The rectangle is represented by (x-width, y-height/2)-(x, y+height/2)
+   */
+  RIGHT_MIDDLE,
+
+  /**
+   * @brief Defines Right-Bottom coordinate as the base point of (x, y)
+   * The rectangle is represented by (x-width, y-height)-(x, y)
+   */
+  RIGHT_BOTTOM,
+
+  /**
+   * @brief Defines Center-Top coordinate as the base point of (x, y)
+   * The rectangle is represented by (x-width/2, y)-(x+width/2, y+height)
+   */
+  CENTER_TOP,
+
+  /**
+   * @brief Defines Center-Middle coordinate as the base point of (x, y)
+   * The rectangle is represented by (x-width/2, y-height/2)-(x+width/2, y+height/2)
+   */
+  CENTER_MIDDLE,
+
+  /**
+   * @brief Defines Center-Bottom coordinate as the base point of (x, y)
+   * The rectangle is represented by (x-width/2, y-height)-(x+width/2, y)
+   */
+  CENTER_BOTTOM
+};
+
+}
+
+#endif