diff --git a/gramps/plugins/webreport/person.py b/gramps/plugins/webreport/person.py
index f99882d17cb..f1822f7bdc4 100644
--- a/gramps/plugins/webreport/person.py
+++ b/gramps/plugins/webreport/person.py
@@ -838,6 +838,11 @@ def __create_family_map(self, person, place_lat_long):
         number_markers = len(place_lat_long)
         if number_markers > 1:
             for latitude, longitude, placetitle, handle, event in place_lat_long:
+                latitude, longitude = conv_lat_lon(
+                    latitude,
+                    longitude,
+                    "D.D8"
+                )
                 xwidth.append(latitude)
                 yheight.append(longitude)
             xwidth.sort()
@@ -854,7 +859,9 @@ def __create_family_map(self, person, place_lat_long):
             midy_ = str(Decimal((miny + maxy) / 2))
 
             midx_, midy_ = conv_lat_lon(
-                midx_, midy_, coord_formats[self.report.options["coord_format"]]
+                midx_,
+                midy_,
+                "D.D8"
             )
 
             # get the integer span of latitude and longitude
@@ -1154,6 +1161,11 @@ def __create_family_map(self, person, place_lat_long):
                 # we are using OpenStreetMap
                 elif self.mapservice == "OpenStreetMap":
                     if midy_ is None:
+                        latitude, longitude = conv_lat_lon(
+                            latitude,
+                            longitude,
+                            "D.D8"
+                        )
                         jsc += OSM_MARKERS % (
                             "markers",
                             tracelife,