From c64eefec0b51cc82827a6abdde5362668def1aaa Mon Sep 17 00:00:00 2001
From: Sergey Vartanov <me@enzet.ru>
Date: Mon, 7 Feb 2022 23:18:30 +0300
Subject: [PATCH] Fix boundary box computing.

---
 map_machine/mapper.py         |  2 ++
 map_machine/osm/osm_reader.py | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/map_machine/mapper.py b/map_machine/mapper.py
index 11df0ef..353ac03 100644
--- a/map_machine/mapper.py
+++ b/map_machine/mapper.py
@@ -285,6 +285,8 @@ def render_map(arguments: argparse.Namespace) -> None:
 
     if not boundary_box:
         boundary_box = osm_data.view_box
+    if not boundary_box:
+        boundary_box = osm_data.boundary_box
 
     # Render
 
diff --git a/map_machine/osm/osm_reader.py b/map_machine/osm/osm_reader.py
index f07b20c..2541fa9 100644
--- a/map_machine/osm/osm_reader.py
+++ b/map_machine/osm/osm_reader.py
@@ -329,6 +329,7 @@ class OSMData:
         self.levels: set[float] = set()
         self.time: MinMax = MinMax()
         self.view_box: Optional[BoundaryBox] = None
+        self.boundary_box: Optional[BoundaryBox] = None
         self.equator_length: float = EARTH_EQUATOR_LENGTH
 
     def add_node(self, node: OSMNode) -> None:
@@ -344,6 +345,15 @@ class OSMData:
             self.levels.union(parse_levels(node.tags["level"]))
         self.time.update(node.timestamp)
 
+        if not self.boundary_box:
+            self.boundary_box = BoundaryBox(
+                node.coordinates[1],
+                node.coordinates[0],
+                node.coordinates[1],
+                node.coordinates[0],
+            )
+        self.boundary_box.update(node.coordinates)
+
     def add_way(self, way: OSMWay) -> None:
         """Add way and update map parameters."""
         if way.id_ in self.ways: