diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2969e31cf9..43bfe95c3b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -286,18 +286,8 @@ link_directories(${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
 # Installation
 ################################################################################
 include(ProjInstallPath)
-set(BINDIR "${DEFAULT_BINDIR}"
-  CACHE PATH "The directory to install binaries into.")
-set(LIBDIR "${DEFAULT_LIBDIR}"
-  CACHE PATH "The directory to install libraries into.")
-set(DATADIR "${DEFAULT_DATADIR}"
-  CACHE PATH "The directory to install data files into.")
-set(DOCDIR "${DEFAULT_DOCDIR}"
-  CACHE PATH "The directory to install doc files into.")
-set(INCLUDEDIR "${DEFAULT_INCLUDEDIR}"
-  CACHE PATH "The directory to install includes into.")
-set(CMAKECONFIGDIR "${DEFAULT_CMAKEDIR}"
-  CACHE PATH "Parent of the directory to install cmake config files into.")
+include(GNUInstallDirs)
+set(PROJ_LIB_PATH "${CMAKE_INSTALL_FULL_DATADIR}/proj")
 
 ################################################################################
 # Tests
@@ -326,7 +316,7 @@ endif()
 
 set(docfiles COPYING NEWS AUTHORS)
 install(FILES ${docfiles}
-        DESTINATION "${DOCDIR}")
+        DESTINATION ${CMAKE_INSTALL_DOCDIR})
 
 ################################################################################
 # pkg-config support
@@ -335,7 +325,7 @@ configure_proj_pc()
 
 install(FILES
   ${CMAKE_CURRENT_BINARY_DIR}/proj.pc
-  DESTINATION ${LIBDIR}/pkgconfig)
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 
 ################################################################################
 # "make dist" workalike
diff --git a/cmake/CMakeLists.txt b/cmake/CMakeLists.txt
index c790fa4a86..3854b1207c 100644
--- a/cmake/CMakeLists.txt
+++ b/cmake/CMakeLists.txt
@@ -64,9 +64,6 @@ string (TOLOWER "${PROJECT_LEGACY_NAME}" PROJECT_LEGACY_LOWER)
 #
 # At some more distant date, the PROJ4::proj target will be retired.
 #
-# To support this change, the CACHE variables PROJ_CMAKE_SUBDIR (and
-# CMAKECONFIGDIR) is now the "Parent of directory to install cmake
-# config files into".
 #
 # All this messiness is confined to
 #
@@ -95,7 +92,7 @@ endif ()
 
 foreach (PROJECT_VARIANT_NAME ${PROJECT_NAME} ${PROJECT_LEGACY_NAME})
   string (TOLOWER "${PROJECT_VARIANT_NAME}" PROJECT_VARIANT_LOWER)
-  set (CMAKECONFIGSUBDIR "${CMAKECONFIGDIR}/${PROJECT_VARIANT_LOWER}")
+  set (CMAKECONFIGSUBDIR "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_VARIANT_LOWER}")
   # proj-config.cmake for the install tree.  It's installed in
   # ${CMAKECONFIGSUBDIR} and @PROJECT_ROOT_DIR@ is the relative
   # path to the root from there.  (Note that the whole install tree can
diff --git a/cmake/ProjInstallPath.cmake b/cmake/ProjInstallPath.cmake
index c7be919cb1..b995d5a003 100644
--- a/cmake/ProjInstallPath.cmake
+++ b/cmake/ProjInstallPath.cmake
@@ -21,58 +21,3 @@ endif()
 
 #TODO
 # for data install testing the PROJ_LIB envVar
-
-string(TOLOWER "${PROJECT_NAME}" PROJECT_NAME_LOWER)
-if(UNIX OR MINGW)
-  include(GNUInstallDirs)
-  set(DEFAULT_BIN_SUBDIR ${CMAKE_INSTALL_BINDIR})
-  set(DEFAULT_LIB_SUBDIR ${CMAKE_INSTALL_LIBDIR})
-  set(DEFAULT_DATA_SUBDIR ${CMAKE_INSTALL_DATAROOTDIR}/proj)
-  set(DEFAULT_INCLUDE_SUBDIR ${CMAKE_INSTALL_INCLUDEDIR})
-  set(DEFAULT_DOC_SUBDIR share/doc/${PROJECT_NAME_LOWER})
-  set(DEFAULT_CMAKE_SUBDIR ${CMAKE_INSTALL_LIBDIR}/cmake)
-else()
-  # Common locations for Unix and Mac OS X
-  set(DEFAULT_BIN_SUBDIR bin)
-  set(DEFAULT_LIB_SUBDIR lib)
-  set(DEFAULT_DATA_SUBDIR share/proj)
-  set(DEFAULT_DOC_SUBDIR doc/proj)
-  set(DEFAULT_INCLUDE_SUBDIR include)
-  set(DEFAULT_DOC_SUBDIR share/doc/proj)
-  set(DEFAULT_CMAKE_SUBDIR lib/cmake)
-  # Used for proj.pc
-  set(CMAKE_INSTALL_DATAROOTDIR share)
-endif()
-
-# Locations are changeable by user to customize layout of PROJ installation
-# (default values are platform-specific)
-set(PROJ_BIN_SUBDIR ${DEFAULT_BIN_SUBDIR} CACHE STRING
-  "Subdirectory where executables will be installed")
-set(PROJ_LIB_SUBDIR ${DEFAULT_LIB_SUBDIR} CACHE STRING
-  "Subdirectory where libraries will be installed")
-set(PROJ_INCLUDE_SUBDIR ${DEFAULT_INCLUDE_SUBDIR} CACHE STRING
-  "Subdirectory where header files will be installed")
-set(PROJ_DATA_SUBDIR ${DEFAULT_DATA_SUBDIR} CACHE STRING
-  "Subdirectory where data will be installed")
-set(PROJ_DOC_SUBDIR ${DEFAULT_DOC_SUBDIR} CACHE STRING
-  "Subdirectory where doc will be installed")
-set(PROJ_CMAKE_SUBDIR ${DEFAULT_CMAKE_SUBDIR} CACHE STRING
-  "Parent of subdirectory where cmake proj-config file will be installed")
-
-# Mark *DIR variables as advanced and dedicated to use by power-users only.
-mark_as_advanced(
-  PROJ_ROOT_DIR
-  PROJ_BIN_SUBDIR
-  PROJ_LIB_SUBDIR
-  PROJ_INCLUDE_SUBDIR
-  PROJ_DATA_SUBDIR
-  PROJ_DOC_SUBDIR
-  PROJ_CMAKE_SUBDIR
-)
-
-set(DEFAULT_BINDIR "${PROJ_BIN_SUBDIR}")
-set(DEFAULT_LIBDIR "${PROJ_LIB_SUBDIR}")
-set(DEFAULT_DATADIR "${PROJ_DATA_SUBDIR}")
-set(DEFAULT_DOCDIR "${PROJ_DOC_SUBDIR}")
-set(DEFAULT_INCLUDEDIR "${PROJ_INCLUDE_SUBDIR}")
-set(DEFAULT_CMAKEDIR "${PROJ_CMAKE_SUBDIR}")
diff --git a/cmake/ProjMac.cmake b/cmake/ProjMac.cmake
index d566ef0edc..d91ab66c0e 100644
--- a/cmake/ProjMac.cmake
+++ b/cmake/ProjMac.cmake
@@ -22,7 +22,9 @@ if(APPLE)
   option(BUILD_FRAMEWORKS_AND_BUNDLE
     "if set to ON, build a library framework and application bundle, \
 otherwise install classical UNIX bin/lib" OFF)
-  set(DEFAULT_BINDIR ${BUNDLEDIR})
+  if(BUILD_FRAMEWORKS_AND_BUNDLE)
+    set(CMAKE_INSTALL_BINDIR ${BUNDLEDIR})
+  endif()
   print_variable(BUNDLEDIR)
   print_variable(PROJ_INSTALL_NAME_DIR)
   print_variable(FRAMEWORKDIR)
diff --git a/cmake/ProjUtilities.cmake b/cmake/ProjUtilities.cmake
index f0853fe315..78044b9d74 100644
--- a/cmake/ProjUtilities.cmake
+++ b/cmake/ProjUtilities.cmake
@@ -68,10 +68,9 @@ endfunction()
 #
 
 function(configure_proj_pc)
-  set(prefix "${CMAKE_INSTALL_PREFIX}")
-  set(exec_prefix "$\{prefix\}")
-  set(libdir "$\{exec_prefix\}/${PROJ_LIB_SUBDIR}")
-  set(includedir "$\{prefix\}/${PROJ_INCLUDE_SUBDIR}")
+  set(prefix ${CMAKE_INSTALL_PREFIX})
+  set(libdir "$\{prefix\}/${CMAKE_INSTALL_LIBDIR}")
+  set(includedir "$\{prefix\}/${CMAKE_INSTALL_INCLUDEDIR}")
   set(datarootdir "$\{prefix\}/${CMAKE_INSTALL_DATAROOTDIR}")
   set(datadir "$\{datarootdir\}")
   set(PACKAGE "proj")
diff --git a/cmake/project-config.cmake.in b/cmake/project-config.cmake.in
index 23f997abd5..a1d3bd329d 100644
--- a/cmake/project-config.cmake.in
+++ b/cmake/project-config.cmake.in
@@ -11,9 +11,10 @@
 # Tell the user project where to find our headers and libraries
 get_filename_component (_DIR ${CMAKE_CURRENT_LIST_FILE} PATH)
 get_filename_component (_ROOT "${_DIR}/@PROJECT_ROOT_DIR@" ABSOLUTE)
-set (@PROJECT_VARIANT_NAME@_INCLUDE_DIRS "${_ROOT}/@INCLUDEDIR@")
-set (@PROJECT_VARIANT_NAME@_LIBRARY_DIRS "${_ROOT}/@LIBDIR@")
-set (@PROJECT_VARIANT_NAME@_BINARY_DIRS "${_ROOT}/@BINDIR@")
+# Use _ROOT as prefix here for the possibility of relocation after installation.
+set (@PROJECT_VARIANT_NAME@_INCLUDE_DIRS "${_ROOT}/@CMAKE_INSTALL_INCLUDEDIR@")
+set (@PROJECT_VARIANT_NAME@_LIBRARY_DIRS "${_ROOT}/@CMAKE_INSTALL_LIBDIR@")
+set (@PROJECT_VARIANT_NAME@_BINARY_DIRS "${_ROOT}/@CMAKE_INSTALL_BINDIR@")
 
 set (@PROJECT_VARIANT_NAME@_LIBRARIES @PROJECT_VARIANT_NAME@::proj)
 # Read in the exported definition of the library
diff --git a/data/CMakeLists.txt b/data/CMakeLists.txt
index d460d371aa..032c491389 100644
--- a/data/CMakeLists.txt
+++ b/data/CMakeLists.txt
@@ -101,5 +101,5 @@ set(ALL_DATA_FILE
 )
 install(
   FILES ${ALL_DATA_FILE}
-  DESTINATION ${DATADIR}
+  DESTINATION ${PROJ_LIB_PATH}
 )
diff --git a/include/proj/CMakeLists.txt b/include/proj/CMakeLists.txt
index 0d9abee3bd..f9c727a028 100644
--- a/include/proj/CMakeLists.txt
+++ b/include/proj/CMakeLists.txt
@@ -1,7 +1,5 @@
-set(installdest ${INCLUDEDIR}/proj)
-
 install(
   FILES util.hpp metadata.hpp common.hpp crs.hpp datum.hpp
     coordinatesystem.hpp coordinateoperation.hpp io.hpp nn.hpp
-  DESTINATION ${installdest}
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/proj
 )
diff --git a/proj.pc.in b/proj.pc.in
index 9855aadccf..641bab16c5 100644
--- a/proj.pc.in
+++ b/proj.pc.in
@@ -1,5 +1,4 @@
 prefix=@prefix@
-exec_prefix=@exec_prefix@
 libdir=@libdir@
 includedir=@includedir@
 datarootdir=@datarootdir@
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 01e069794a..6ba505b37e 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -9,5 +9,5 @@ add_subdirectory(tests)
 
 if(APPLE)
   # Directory name for installed targets
-  set(CMAKE_INSTALL_NAME_DIR "${CMAKE_INSTALL_PREFIX}/${LIBDIR}")
+  set(CMAKE_INSTALL_NAME_DIR ${CMAKE_INSTALL_FULL_LIBDIR})
 endif()
diff --git a/src/apps/CMakeLists.txt b/src/apps/CMakeLists.txt
index 0f16ef91ba..cdd85bd36b 100644
--- a/src/apps/CMakeLists.txt
+++ b/src/apps/CMakeLists.txt
@@ -29,9 +29,9 @@ if(NOT MSVC)
 
   # Use relative path so that package is relocatable
   if(APPLE)
-    set(CMAKE_INSTALL_RPATH "@loader_path/../${LIBDIR}")
+    set(CMAKE_INSTALL_RPATH "@loader_path/../${CMAKE_INSTALL_LIBDIR}")
   else()
-    set(CMAKE_INSTALL_RPATH "\$ORIGIN/../${LIBDIR}")
+    set(CMAKE_INSTALL_RPATH "\$ORIGIN/../${CMAKE_INSTALL_LIBDIR}")
   endif()
   # Other apps can link to libproj using e.g. LDFLAGS -Wl,-rpath,${prefix}/lib
 
diff --git a/src/apps/bin_cct.cmake b/src/apps/bin_cct.cmake
index 94b0f87898..403733fb19 100644
--- a/src/apps/bin_cct.cmake
+++ b/src/apps/bin_cct.cmake
@@ -11,4 +11,4 @@ add_executable(cct ${CCT_SRC} ${CCT_INCLUDE})
 target_link_libraries(cct PRIVATE ${PROJ_LIBRARIES})
 
 install(TARGETS cct
-  DESTINATION ${BINDIR})
+  DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/src/apps/bin_cs2cs.cmake b/src/apps/bin_cs2cs.cmake
index c5e82478f2..a9f77c7b93 100644
--- a/src/apps/bin_cs2cs.cmake
+++ b/src/apps/bin_cs2cs.cmake
@@ -10,4 +10,4 @@ add_executable(cs2cs ${CS2CS_SRC} ${CS2CS_INCLUDE})
 target_link_libraries(cs2cs PRIVATE ${PROJ_LIBRARIES})
 
 install(TARGETS cs2cs
-  DESTINATION ${BINDIR})
+  DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/src/apps/bin_geod.cmake b/src/apps/bin_geod.cmake
index 4fa419779c..8466898dff 100644
--- a/src/apps/bin_geod.cmake
+++ b/src/apps/bin_geod.cmake
@@ -12,7 +12,7 @@ add_executable(geod ${GEOD_SRC} ${GEOD_INCLUDE})
 target_link_libraries(geod PRIVATE ${PROJ_LIBRARIES})
 
 install(TARGETS geod
-  DESTINATION ${BINDIR})
+  DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 # invgeod target: symlink or copy of geod executable
 
@@ -32,7 +32,7 @@ if(UNIX)
 
     add_custom_target(invgeod ALL DEPENDS ${link_target})
 
-    install(FILES ${link_target} DESTINATION ${BINDIR})
+    install(FILES ${link_target} DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 else()
 
@@ -40,6 +40,6 @@ else()
     target_link_libraries(invgeod PRIVATE ${PROJ_LIBRARIES})
 
     install(TARGETS invgeod
-      DESTINATION ${BINDIR})
+      DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 endif()
diff --git a/src/apps/bin_gie.cmake b/src/apps/bin_gie.cmake
index 8e2d227838..f3079735c9 100644
--- a/src/apps/bin_gie.cmake
+++ b/src/apps/bin_gie.cmake
@@ -12,5 +12,5 @@ target_link_libraries(gie PRIVATE ${PROJ_LIBRARIES})
 
 if(BUILD_GIE)
   install(TARGETS gie
-    DESTINATION ${BINDIR})
+    DESTINATION ${CMAKE_INSTALL_BINDIR})
 endif()
diff --git a/src/apps/bin_proj.cmake b/src/apps/bin_proj.cmake
index 86232f591c..b410e63bb1 100644
--- a/src/apps/bin_proj.cmake
+++ b/src/apps/bin_proj.cmake
@@ -13,7 +13,7 @@ set_target_properties(binproj
 target_link_libraries(binproj PRIVATE ${PROJ_LIBRARIES})
 
 install(TARGETS binproj
-  DESTINATION ${BINDIR})
+  DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 # invproj target: symlink or copy of proj executable
 
@@ -33,7 +33,7 @@ if(UNIX)
 
     add_custom_target(invproj ALL DEPENDS ${link_target})
 
-    install(FILES ${link_target} DESTINATION ${BINDIR})
+    install(FILES ${link_target} DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 else()
 
@@ -41,6 +41,6 @@ else()
     target_link_libraries(invproj PRIVATE ${PROJ_LIBRARIES})
 
     install(TARGETS invproj
-      DESTINATION ${BINDIR})
+      DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 endif()
diff --git a/src/apps/bin_projinfo.cmake b/src/apps/bin_projinfo.cmake
index e5b03424be..6bd6355ad4 100644
--- a/src/apps/bin_projinfo.cmake
+++ b/src/apps/bin_projinfo.cmake
@@ -6,7 +6,7 @@ add_executable(projinfo ${PROJINFO_SRC})
 target_link_libraries(projinfo PRIVATE ${PROJ_LIBRARIES})
 
 install(TARGETS projinfo
-  DESTINATION ${BINDIR})
+  DESTINATION ${CMAKE_INSTALL_BINDIR})
 
 if(CURL_ENABLED)
   target_compile_definitions(projinfo PRIVATE -DCURL_ENABLED)
diff --git a/src/apps/bin_projsync.cmake b/src/apps/bin_projsync.cmake
index c51d28da9c..3f24fb398b 100644
--- a/src/apps/bin_projsync.cmake
+++ b/src/apps/bin_projsync.cmake
@@ -6,4 +6,4 @@ add_executable(projsync ${PROJSYNC_SRC})
 target_link_libraries(projsync PRIVATE ${PROJ_LIBRARIES})
 
 install(TARGETS projsync
-  DESTINATION ${BINDIR})
+  DESTINATION ${CMAKE_INSTALL_BINDIR})
diff --git a/src/lib_proj.cmake b/src/lib_proj.cmake
index 986f499e61..da0cc1290d 100644
--- a/src/lib_proj.cmake
+++ b/src/lib_proj.cmake
@@ -294,7 +294,7 @@ include_directories(${CMAKE_CURRENT_BINARY_DIR})
 source_group("CMake Files" FILES CMakeLists.txt)
 
 # Embed PROJ_LIB data files location
-add_definitions(-DPROJ_LIB="${CMAKE_INSTALL_PREFIX}/${DATADIR}")
+add_definitions(-DPROJ_LIB="${PROJ_LIB_PATH}")
 
 
 ###########################################################
@@ -399,7 +399,7 @@ endif()
 target_include_directories(proj INTERFACE
   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
   $<BUILD_INTERFACE:${PROJ_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:${INCLUDEDIR}>)
+  $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
 
 if(WIN32)
   set_target_properties(proj
@@ -487,14 +487,14 @@ endif()
 ##############################################
 install(TARGETS proj
   EXPORT targets
-  RUNTIME DESTINATION ${BINDIR}
-  LIBRARY DESTINATION ${LIBDIR}
-  ARCHIVE DESTINATION ${LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
   FRAMEWORK DESTINATION ${FRAMEWORKDIR})
 
 if(NOT BUILD_FRAMEWORKS_AND_BUNDLE)
   install(FILES ${ALL_LIBPROJ_HEADERS}
-    DESTINATION ${INCLUDEDIR})
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
 endif()
 
 ##############################################