updated migration

Signed-off-by: Jenn Nguyen <[email protected]>

Migration.md

@@ -5,6 +5,20 @@ Deprecated code produces compile-time warnings. These warning serve as
 notification to users that their code should be upgraded. The next major
 release will remove the deprecated code.
 
+## Ignition Common 4.X to 5.X
+
+### Additions
+
+1. **geospatial** component that loads heightmap images and DEMs
+    + Depends on the ign-common's `graphics` component and the `gdal` library
+
+### Modifications
+
+1. `HeightmapData.hh` and `ImageHeightmap.hh` have been moved out of the
+`graphics` component and into the new `geospatial` component
+    + To use the heightmap features, users must add the `geospatial` component
+      to the `find_package` call
+
 ## Ignition Common 3.X to 4.X
 
 ### Modifications
@@ -72,4 +86,3 @@ release will remove the deprecated code.
 1. **ignition-cmake**
     + Ignition-math now has a build dependency on ignition-cmake, which
       allows cmake scripts to be shared across all the ignition packages.
-

geospatial/include/ignition/common/HeightmapData.hh

@@ -17,6 +17,7 @@
 #ifndef IGNITION_COMMON_HEIGHTMAPDATA_HH_
 #define IGNITION_COMMON_HEIGHTMAPDATA_HH_
 
+#include <string>
 #include <vector>
 #include <ignition/math/Vector3.hh>
 #include <ignition/common/graphics/Export.hh>