france

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.

Region Curvature ≥ 1000
Very twisty
Curvature ≥ 300
Moderately twisty
Detected curves
(Curvature ≥ 1000)
Date Updated
alsace c_1000 c_300 c_1000.curves 2021-02-15 10:03 UTC
aquitaine c_1000 c_300 c_1000.curves 2021-02-15 23:09 UTC
auvergne c_1000 c_300 c_1000.curves 2021-02-15 23:19 UTC
basse-normandie c_1000 c_300 c_1000.curves 2021-02-15 23:29 UTC
bourgogne c_1000 c_300 c_1000.curves 2021-02-15 23:37 UTC
bretagne c_1000 c_300 c_1000.curves 2021-02-15 23:52 UTC
centre c_1000 c_300 c_1000.curves 2021-02-16 00:05 UTC
champagne-ardenne c_1000 c_300 c_1000.curves 2021-02-16 00:11 UTC
corse c_1000 c_300 c_1000.curves 2021-02-16 02:01 UTC
franche-comte c_1000 c_300 c_1000.curves 2021-02-16 04:03 UTC
guadeloupe c_1000 c_300 c_1000.curves 2021-02-16 06:00 UTC
guyane c_1000 c_300 c_1000.curves 2021-02-16 08:00 UTC
haute-normandie c_1000 c_300 c_1000.curves 2021-02-16 10:03 UTC
ile-de-france c_1000 c_300 c_1000.curves 2021-02-16 23:08 UTC
languedoc-roussillon c_1000 c_300 c_1000.curves 2021-02-16 23:19 UTC
limousin c_1000 c_300 c_1000.curves 2021-02-16 23:29 UTC
lorraine c_1000 c_300 c_1000.curves 2021-02-16 23:36 UTC
martinique c_1000 c_300 c_1000.curves 2021-02-16 23:40 UTC
mayotte c_1000 c_300 c_1000.curves 2021-02-16 23:42 UTC
midi-pyrenees c_1000 c_300 c_1000.curves 2021-02-17 00:10 UTC
nord-pas-de-calais c_1000 c_300 c_1000.curves 2021-02-17 02:06 UTC
pays-de-la-loire c_1000 c_300 c_1000.curves 2021-02-17 04:10 UTC
picardie c_1000 c_300 c_1000.curves 2021-02-17 06:03 UTC
poitou-charentes c_1000 c_300 c_1000.curves 2021-02-17 08:07 UTC
provence-alpes-cote-d-azur c_1000 c_300 c_1000.curves 2021-02-17 10:09 UTC
reunion c_1000 c_300 c_1000.curves 2021-02-17 23:01 UTC
rhone-alpes c_1000 c_300 c_1000.curves 2021-02-17 23:19 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.