use correct import of SDF library

CMakeLists.txt

@@ -14,7 +14,8 @@ find_package(catkin REQUIRED COMPONENTS
 
 ## System dependencies are found with CMake's conventions
 # find_package(Boost REQUIRED COMPONENTS system)
-find_package(SDFormat)
+message("ERROR" "${CMAKE_MODULE_PATH}")
+find_package(sdformat9 CONFIG REQUIRED)
 
 # this is the last resort if the package cannot be found otherwise
 #find_package(PkgConfig REQUIRED)
@@ -105,6 +106,11 @@ find_package(SDFormat)
 ## LIBRARIES: libraries you create in this project that dependent projects also need
 ## CATKIN_DEPENDS: catkin_packages dependent projects also need
 ## DEPENDS: system dependencies of this project that dependent projects also need
+get_cmake_property(_variableNames VARIABLES)
+list (SORT _variableNames)
+foreach (_variableName ${_variableNames})
+    message(STATUS "${_variableName}=${${_variableName}}")
+endforeach()
 catkin_package(
   INCLUDE_DIRS include
   LIBRARIES gazebo_zone_utility
@@ -120,8 +126,7 @@ catkin_package(
 ## Your package locations should be listed before other locations
 include_directories(
   include
-  /usr/include/sdformat-9.2
-  /usr/include/ignition/math6
+  ${SDFormat_INCLUDE_DIRS}
   ${catkin_INCLUDE_DIRS}
 )