asia

Curvature files are created by analyzing the geometry of highways in the OpenStreetMap dataset to detect curves and ranking each segment based on how many curves there are. The highways are then filtered to include only the most twisty segments in the output. Additional filtering is done to exclude segments marked with surface tags that indicate that they are unpaved. The resulting highways are combined into color-coded KML/KMZ files that can be opened in GoogleEarth or other programs for viewing. See the Using KML Files and Detected Curves KML files pages for more details.

Sub-divided Regions

Region Curvature ≥ 1000
Very twisty
Curvature ≥ 300
Moderately twisty
Detected curves
(Curvature ≥ 1000)
Date Updated
afghanistan c_1000 c_300 c_1000.curves 2020-11-25 23:11 UTC
azerbaijan c_1000 c_300 c_1000.curves 2020-11-25 23:14 UTC
bangladesh c_1000 c_300 c_1000.curves 2020-11-25 23:33 UTC
bhutan c_1000 c_300 c_1000.curves 2020-11-25 23:37 UTC
cambodia c_1000 c_300 c_1000.curves 2020-11-25 23:40 UTC
china c_1000 c_300 c_1000.curves 2020-11-26 01:48 UTC
gcc-states c_1000 c_300 c_1000.curves 2020-11-26 02:52 UTC
india c_1000 c_300 c_1000.curves 2020-11-02 00:54 UTC
indonesia c_1000 c_300 c_1000.curves 2020-11-26 07:58 UTC
iran c_1000 c_300 c_1000.curves 2020-11-26 08:44 UTC
iraq c_1000 c_300 c_1000.curves 2020-11-26 10:07 UTC
israel-and-palestine c_1000 c_300 c_1000.curves 2020-11-26 23:04 UTC
japan c_1000 c_300 c_1000.curves 2016-06-16 09:19 UTC
jordan c_1000 c_300 c_1000.curves 2020-11-27 06:03 UTC
kazakhstan c_1000 c_300 c_1000.curves 2020-11-27 08:05 UTC
kyrgyzstan c_1000 c_300 c_1000.curves 2020-11-27 10:01 UTC
laos c_1000 c_300 c_1000.curves 2020-11-27 23:01 UTC
lebanon c_1000 c_300 c_1000.curves 2020-11-27 23:08 UTC
malaysia-singapore-brunei c_1000 c_300 c_1000.curves 2020-11-27 23:35 UTC
maldives c_1000 c_300 c_1000.curves 2020-11-27 23:43 UTC
mongolia c_1000 c_300 c_1000.curves 2020-11-27 23:45 UTC
myanmar c_1000 c_300 c_1000.curves 2020-11-27 23:58 UTC
nepal c_1000 c_300 c_1000.curves 2020-11-28 00:17 UTC
north-korea c_1000 c_300 c_1000.curves 2020-11-28 02:03 UTC
pakistan c_1000 c_300 c_1000.curves 2020-11-28 04:09 UTC
philippines c_1000 c_300 c_1000.curves 2020-11-28 06:26 UTC
south-korea c_1000 c_300 c_1000.curves 2020-11-28 08:13 UTC
sri-lanka c_1000 c_300 c_1000.curves 2020-11-28 10:07 UTC
syria c_1000 c_300 c_1000.curves 2020-11-28 23:04 UTC
taiwan c_1000 c_300 c_1000.curves 2020-11-28 23:13 UTC
tajikistan c_1000 c_300 c_1000.curves 2020-11-28 23:20 UTC
thailand c_1000 c_300 c_1000.curves 2020-11-28 23:51 UTC
turkmenistan c_1000 c_300 c_1000.curves 2020-11-29 00:00 UTC
uzbekistan c_1000 c_300 c_1000.curves 2020-11-29 00:05 UTC
vietnam c_1000 c_300 c_1000.curves 2020-11-29 00:41 UTC
yemen c_1000 c_300 c_1000.curves 2020-11-29 02:19 UTC

Improving the Data

Because Curvature uses the OpenStreetMap -- a world-map that anyone can edit -- as its data source, you too can improve the map and thereby improve the Curvature files the next time they are generated. For more information about improvements that are of particular help to Curvature, please see the Curvature OpenStreetMap page.