diff --git a/scripts/borders.sql b/scripts/borders.sql
index c43bb74..00094e5 100644
--- a/scripts/borders.sql
+++ b/scripts/borders.sql
@@ -12,5 +12,16 @@ create table borders (
 	cmnt varchar(500)
 );
 
+create table borders_backup (
+	backup varchar(30) not null,
+	name varchar(200) not null,
+	geom geometry not null,
+	disabled boolean not null default FALSE,
+	count_k integer,
+	modified timestamp not null,
+	cmnt varchar(500),
+	primary key (backup, name)
+);
+
 create index border_idx on borders using gist (geom);
 create index tiles_idx on tiles using gist (tile);
diff --git a/scripts/osm_borders.sh b/scripts/osm_borders.sh
index 72e8921..65258fe 100755
--- a/scripts/osm_borders.sh
+++ b/scripts/osm_borders.sh
@@ -65,7 +65,7 @@ fi
 
 # 3. Make osm_borders table
 echo Creating osm_borders table
-psql $DATABASE -c "drop table if exists osm_borders; create table osm_borders as select min(osm_id) as osm_id, ST_Transform(ST_Collect(way),4326) as way, admin_level::int as admin_level, coalesce(max(\"name:en\"), name) as name from planet_osm_polygon where boundary='administrative' and admin_level in ('2', '3', '4', '5', '6') group by name, admin_level;" || exit 3
+psql $DATABASE -c "drop table if exists osm_borders; create table osm_borders as select min(osm_id) as osm_id, ST_Buffer(ST_Transform(ST_Collect(way),4326), 0) as way, admin_level::int as admin_level, coalesce(max(\"name:en\"), name) as name from planet_osm_polygon where boundary='administrative' and admin_level in ('2', '3', '4', '5', '6') group by name, admin_level;" || exit 3
 
 # 4. Copy it to the borders database
 echo Copying osm_borders table to the borders database
diff --git a/server/borders-api.py b/server/borders-api.py
index eac4bf0..557218a 100755
--- a/server/borders-api.py
+++ b/server/borders-api.py
@@ -2,12 +2,13 @@
 from flask import Flask, g, request, json, jsonify, abort, Response
 from flask.ext.cors import CORS
 from flask.ext.compress import Compress
-import psycopg2
 from lxml import etree
 from xml.sax.saxutils import quoteattr
+import psycopg2
 
 TABLE = 'borders'
 OSM_TABLE = 'osm_borders'
+BACKUP = 'borders_backup'
 READONLY = False
 
 app = Flask(__name__)
@@ -230,7 +231,13 @@ def divide():
 	if prefix != '':
 		prefix = '{}_'.format(prefix);
 	cur = g.conn.cursor()
-	cur.execute('insert into {table} (geom, name, modified, count_k) select o.way as way, %s || name, now(), -1 from {osm}, (select way from {osm} where name like %s) r where ST_Contains(r.way, o.way) and {query};'.format(table=TABLE, osm=OSM_TABLE, query=query), (prefix, like,))
+	cur.execute('''insert into {table} (geom, name, modified, count_k)
+		select o.way as way, %s || name, now(), -1
+		from {osm} o, (
+			select way from {osm} where name like %s
+		) r
+		where ST_Contains(r.way, o.way) and {query};
+		'''.format(table=TABLE, osm=OSM_TABLE, query=query), (prefix, like,))
 	cur.execute('delete from {} where name = %s;'.format(TABLE), (name,))
 	g.conn.commit()
 	return jsonify(status='ok')
@@ -273,6 +280,39 @@ def draw_hull():
 	g.conn.commit()
 	return jsonify(status='ok')
 
+@app.route('/backup')
+def backup_do():
+	cur = g.conn.cursor()
+	cur.execute("SELECT to_char(now(), 'IYYY-MM-DD HH24:MI'), max(backup) from {};".format(BACKUP))
+	(timestamp, tsmax) = cur.fetchone()
+	if timestamp == tsmax:
+		return jsonify(status='please try again later')
+	cur.execute('INSERT INTO {backup} (backup, name, geom, disabled, count_k, modified, cmnt) SELECT %s, name, geom, disabled, count_k, modified, cmnt from {table};'.format(backup=BACKUP, table=TABLE), (timestamp,))
+	g.conn.commit()
+	return jsonify(status='ok')
+
+@app.route('/restore')
+def backup_restore():
+	ts = request.args.get('timestamp')
+	cur = g.conn.cursor()
+	cur.execute('SELECT count(1) from {} where backup = %s;'.format(BACKUP), (ts,))
+	(count,) = cur.fetchone()
+	if count <= 0:
+		return jsonify(status='no such timestamp')
+	cur.execute('DELETE FROM {};'.format(TABLE))
+	cur.execute('INSERT INTO {table} (name, geom, disabled, count_k, modified, cmnt) SELECT name, geom, disabled, count_k, modified, cmnt from {backup} where backup = %s;'.format(backup=BACKUP, table=TABLE), (ts,))
+	g.conn.commit()
+	return jsonify(status='ok')
+
+@app.route('/backlist')
+def backup_list():
+	cur = g.conn.cursor()
+	cur.execute("SELECT backup, count(1) from {} group by backup order by backup desc;".format(BACKUP))
+	result = []
+	for res in cur:
+		result.append({ 'timestamp': res[0], 'text': res[0], 'count': res[1] })
+	return jsonify(backups=result)
+
 @app.route('/josm')
 def make_osm():
 	xmin = request.args.get('xmin')
@@ -496,7 +536,6 @@ def import_osm():
 					j = i + 1
 					while way[0] != way[-1] and j < len(multi):
 						print 'maybe way with start={}, end={}?'.format(multi[j]['nodes'][0], multi[j]['nodes'][-1])
-						# todo: do not modify source way!!!
 						new_way = append_way(way, multi[j]['nodes'])
 						if new_way:
 							multi[i] = dict(multi[i])
@@ -553,7 +592,7 @@ def import_osm():
 			updated = updated + 1
 		else:
 			# create
-			cur.execute('insert into {table} (name, disabled, geom, modified, count_k) values (%s, %s, %s, now(), -1);'.format(table=TABLE), (name, region['disabled'], region['wkt']))
+			cur.execute('insert into {table} (name, disabled, geom, modified, count_k) values (%s, %s, ST_GeomFromText(%s, 4326), now(), -1);'.format(table=TABLE), (name, region['disabled'], region['wkt']))
 			added = added + 1
 	g.conn.commit()
 	return jsonify(regions=len(regions), added=added, updated=updated)
diff --git a/www/borders.js b/www/borders.js
index 2ddf264..2a543f5 100644
--- a/www/borders.js
+++ b/www/borders.js
@@ -18,9 +18,9 @@ function init() {
 	map.addLayer(bordersLayer);
 
 	map.on('moveend', function() {
-		if( map.getZoom() >= 4 )
+		if( map.getZoom() >= 5 )
 			updateBorders();
-		$('#b_josm').css('visibility', map.getZoom() >= 8 ? 'visible' : 'hidden');
+		$('#b_josm').css('visibility', map.getZoom() >= 7 ? 'visible' : 'hidden');
 	});
 
 	document.getElementById('filefm').action = server + '/import';
@@ -147,7 +147,7 @@ function selectLayer(e) {
 		if( props['disabled'] )
 			e.target.setStyle({ fillOpacity: 0.01 });
 		$('#b_name').text(props['name']);
-		$('#b_size').text(Math.round(props['count_k'] * 8 / 1000000) + ' MB');
+		$('#b_size').text(Math.round(props['count_k'] * 8 / 1024 / 1024) + ' MB');
 		//$('#b_nodes').text(borders[selectedId].layer.getLatLngs()[0].length);
 		$('#b_nodes').text(props['nodes']);
 		$('#b_date').text(props['modified']);
@@ -503,7 +503,7 @@ function bDivideDrawPreview(geojson) {
 		return;
 	divPreview = L.geoJson(geojson, {
 		style: function(f) {
-			return { color: 'blue', weight: 1 };
+			return { color: 'blue', weight: 1, fill: false };
 		}
 	});
 	map.addLayer(divPreview);
@@ -551,3 +551,52 @@ function bHull() {
 		success: updateBorders
 	});
 }
+
+function bBackup() {
+	$('#actions').css('display', 'none');
+	$('#backup_saving').css('display', 'none');
+	$('#backup_restoring').css('display', 'none');
+	$('#backup_save').attr('disabled', false);
+	$('#backup_list').text('');
+	$('#backup').css('display', 'block');
+	$.ajax(server + '/backlist', {
+		success: updateBackupList
+	});
+}
+
+function bBackupCancel() {
+	$('#actions').css('display', 'block');
+	$('#backup').css('display', 'none');
+}
+
+function updateBackupList(data) {
+	var list = $('#backup_list');
+	list.text('');
+	if( !data || !('backups' in data) )
+		return;
+	for( var i = 0; i < data.backups.length; i++ ) {
+		var b = data.backups[i];
+		var a = document.createElement('a');
+		a.href = '#';
+		a.onclick = (function(id, name) { return function() { bBackupRestore(id); return false } })(b['timestamp']);
+		list.append(a, $('<br>'));
+		$(a).text(b['text'] + ' (' + b['count'] + ')');
+	}
+}
+
+function bBackupSave() {
+	$.ajax(server + '/backup', {
+		success: bBackupCancel
+	});
+	$('#backup_save').attr('disabled', true);
+	$('#backup_saving').css('display', 'block');
+}
+
+function bBackupRestore(timestamp) {
+	$.ajax(server + '/restore', {
+		data: { 'timestamp': timestamp },
+		success: function() { bBackupCancel(); updateBorders(); }
+	});
+	$('#backup_list').text('');
+	$('#backup_restoring').css('display', 'block');
+}
diff --git a/www/index.html b/www/index.html
index 3638936..5cd0eaa 100644
--- a/www/index.html
+++ b/www/index.html
@@ -19,10 +19,11 @@
 			#osm_actions { display: none; margin-top: 1em; }
 			#info { margin-top: 2em; }
 			#b_delete, #b_clear { font-size: 8pt; }
-			#rename, #split, #join, #point, #divide { display: none; }
+			#rename, #split, #join, #point, #divide, #backup { display: none; }
 			.actions input[type='text'] { width: 150px; }
 			#header { border-bottom: 1px solid gray; margin-bottom: 1em; padding-bottom: 1em; }
 			#f_topo, #f_chars, #f_comments { font-size: 10pt; }
+			#backup_saving, #backup_restoring { margin-bottom: 1em; }
 		</style>
 	</head>
 	<body onload="init();">
@@ -58,6 +59,7 @@
 					Импорт <input type="file" accept=".osm,.xml" name="file" id="b_import" onchange="bImport();" style="max-width: 100px;">
 				</form>
 				<iframe name="import_frame" style="display: none;" width="230" height="80" src="about:blank"></iframe>
+				<button onclick="bBackup()">Архив границ</button>
 			</div>
 			<div id="actions" class="actions">
 				<button onclick="bDisable()" id="b_disable">Убрать</button>
@@ -131,6 +133,14 @@
 				<br>
 				<button onclick="bDivideCancel()">Вернуться</button>
 			</div>
+			<div id="backup" class="actions">
+				<button onclick="bBackupSave()" id="backup_save">Сохранить границы</button>
+				<div id="backup_saving">Копирую границы...</div>
+				<div id="backup_restoring">Восстанавливаю границы...</div>
+				<div>Или выберите набор границ для восстановления:</div>
+				<div id="backup_list"></div>
+				<button onclick="bBackupCancel()">Вернуться</button>
+			</div>
 		</div>
 		<div id="map"></div>
 	</body>