diff --git a/tools/python/maps_generator/README.md b/tools/python/maps_generator/README.md
index 1150508d80..15ebe20b37 100644
--- a/tools/python/maps_generator/README.md
+++ b/tools/python/maps_generator/README.md
@@ -1,6 +1,13 @@
 # maps_generator
 It's tool for generation maps for maps.me application.
 
+##  What are maps for maps.me?
+Maps for maps.me are data with special meta information for drawing, quick searching and routing and for other.
+Files from [omim/data/borders](https://github.com/mapsme/omim/tree/master/data/borders) define map boundaries.
+Further we will call it countries or simply maps.
+But there are two special maps: World and WorldCoasts. They are used when other maps have not been downloaded.
+Further we will call them world and coastlines.
+
 ## Setup
 You must have Python version not lower than 3.6 and complete the following steps:
 
@@ -8,7 +15,7 @@ You must have Python version not lower than 3.6 and complete the following steps
 ```sh
 $ cd omim/tools/python/maps_generator
 ```
-1. [Install generator_tool.](https://github.com/mapsme/omim/blob/master/docs/INSTALL.md)
+1. [Build and install generator_tool.](https://github.com/mapsme/omim/blob/master/docs/INSTALL.md)
 2. Install dependencies:
 ```sh
 maps_generator$ pip3 install -r requirements.txt
@@ -70,7 +77,7 @@ OSM_TOOLS_PATH: ~/osmctools
 # the https://somesite.com/download/latest_coasts.rawgeom url will be used to download latest_coasts.rawgeom.
 # PLANET_COASTS_URL:
 # The url to the subway file.
-# SUBWAY_URL:
+SUBWAY_URL: http://osm-subway.maps.me/mapsme/latest.json
 
 # Urls for production maps generation.
 # UGC_URL:
@@ -141,7 +148,7 @@ optional arguments:
 
 If you are not from the maps.me team, then you do not need the option --production when generating maps.
 
-To generate maps for the whole world you need 400 GB of hard disk space and a computer with more than 64 GB.
+To generate maps for the whole planet you need 400 GB of hard disk space and a computer with more than 64 GB.
 
 
 If you want to generate a lot of maps, then it may be important for you to order the generation of maps.
@@ -173,7 +180,7 @@ PLANET_MD5_URL: https://download.geofabrik.de/asia/japan-latest.osm.pbf.md5
 
 3. Run
 ```sh
-python$ python3.6 -m maps_generator --countries="World, WorldCoasts, Japan_*" --skip="update_planet"
+python$ python3.6 -m maps_generator --countries="World, WorldCoasts, Japan_*"
 ```
 You must skip the step of updating the planet, because it is a non-standard planet.
 ####  Rebuild stages:
@@ -183,7 +190,7 @@ You must have previous generation. You may regenerate from stage routing only fo
 ```sh
 python$ python3.6 -m maps_generator -c --from_stage="routing" --countries="Japan_Kinki Region_Osaka_Osaka, Japan_Chugoku Region_Tottori"
 ```
-##### Note: To generate maps with the coastline, you need more time and you need the original piece of the map to contain a continuous coastline.
+##### Note: To generate maps with the coastline, you need more time and you need the planet to contain a continuous coastline.
 
 ####  Non-standard planet without coastlines
 If you want to generate maps for Moscow you must complete the following steps:
@@ -206,6 +213,6 @@ PLANET_MD5_URL: https://download.geofabrik.de/russia/central-fed-district-latest
 
 3. Run
 ```sh
-python$ python3.6 -m maps_generator --countries="Russia_Moscow" --skip="update_planet, coastline"
+python$ python3.6 -m maps_generator --countries="Russia_Moscow" --skip="coastline"
 ```
 You must skip the step of updating the planet, because it is a non-standard planet
\ No newline at end of file
diff --git a/tools/python/maps_generator/__main__.py b/tools/python/maps_generator/__main__.py
index 1ec39dc31b..5fc08a2bdb 100644
--- a/tools/python/maps_generator/__main__.py
+++ b/tools/python/maps_generator/__main__.py
@@ -3,13 +3,14 @@ import os
 from argparse import ArgumentParser, RawDescriptionHelpFormatter
 
 from .generator import settings
-from .generator.env import Env, find_last_build_dir, WORLDS_NAMES
+from .generator.env import (Env, find_last_build_dir, WORLDS_NAMES,
+                            WORLD_NAME, WORLD_COASTS_NAME)
 from .generator.exceptions import ContinueError, SkipError, ValidationError
 from .maps_generator import (generate_maps, generate_coasts, reset_to_stage,
                              ALL_STAGES, stage_download_production_external,
                              stage_descriptions, stage_ugc, stage_popularity,
                              stage_localads, stage_statistics, stage_srtm,
-                             stages_as_string, stage_coastline)
+                             stages_as_string, stage_as_string, stage_coastline)
 from .utils.collections import unique
 
 logger = logging.getLogger("maps_generator")
@@ -199,11 +200,14 @@ def main():
         raise SkipError(f"Stages {set(options['skip']) - set(ALL_STAGES)} "
                         f"not found.")
 
-    if not (set(stages_as_string(stage_coastline)) - set(options["skip"])):
-        countries = [x for x in options["countries"] if x in WORLDS_NAMES]
-        if countries:
-            raise SkipError(f"Skipped stage {stages_as_string(stage_coastline)}"
-                            f" and countries {countries} are not compatible.")
+    if WORLD_NAME in options["countries"] and WORLD_COASTS_NAME not in options["countries"]:
+        raise ValidationError(f"{WORLD_NAME} depends on {WORLD_COASTS_NAME}.")
+
+    if stage_as_string(stage_coastline) in options["skip"]:
+        worlds_names = [x for x in options["countries"] if x in WORLDS_NAMES]
+        if worlds_names:
+            raise SkipError(f"You can not skip {stages_as_string(stage_coastline)}"
+                            f" if you want to generate {countries}")
 
     env = Env(options)
     if env.from_stage:
diff --git a/tools/python/maps_generator/maps_generator.py b/tools/python/maps_generator/maps_generator.py
index c41fafceba..4326f17440 100644
--- a/tools/python/maps_generator/maps_generator.py
+++ b/tools/python/maps_generator/maps_generator.py
@@ -335,6 +335,10 @@ def stages_as_string(*args):
     return [x.__name__ for x in args]
 
 
+def stage_as_string(stage):
+    return stage.__name__
+
+
 def reset_to_stage(stage_name, env):
     def set_countries_stage(n):
         statuses = [os.path.join(env.status_path, f)
diff --git a/tools/python/maps_generator/var/etc/map_generator.ini.default b/tools/python/maps_generator/var/etc/map_generator.ini.default
index 9f03f7f83c..823c2fba74 100644
--- a/tools/python/maps_generator/var/etc/map_generator.ini.default
+++ b/tools/python/maps_generator/var/etc/map_generator.ini.default
@@ -27,11 +27,11 @@ OSM_TOOLS_PATH: ~/osmctools
 # PLANET_URL:
 # PLANET_MD5_URL:
 # PLANET_COASTS_URL:
+SUBWAY_URL: http://osm-subway.maps.me/mapsme/latest.json
 # UGC_URL:
 # HOTELS_URL:
 # PROMO_CATALOG_CITIES_URL:
 # POPULARITY_URL:
-# SUBWAY_URL:
 # FOOD_URL:
 # FOOD_TRANSLATIONS_URL:
 # SRTM_PATH: