[talk-ph] Fwd:[HOT] "OpenUnpavedStreetMap", "South continents", Colombia, soon Philippines

maning sambale emmanuel.sambale at gmail.com
Tue Dec 20 15:27:50 GMT 2011

FYI.  This rendering is very useful for rural areas and perhaps to monitor
DPWH road projects. ;)
---------- Forwarded message ----------
From: "Jean-Guilhem Cailton" <jgc at arkemie.com>
Date: Dec 20, 2011 11:12 PM
Subject: [HOT] "OpenUnpavedStreetMap", "South continents", Colombia, soon
To: "HOT" <hot at openstreetmap.org>


Knowing whether a road is paved or not is an important information for a
driver, especially in countries where many roads are unpaved. This
information can be entered in the OSM database with the surface tag [1],
but it is not currently rendered in the main maps available on osm.org
[2]. Seeing it rendered on a map would likely be an incentive for
mappers to use it, especially beginners.

A map with a rendering for this, OpenUnpavedStreetMap, is now available
for Africa, Central and South America, Australia-Oceania (according to
Geofabrik's definition, which includes Indonesia and Malaysia), and soon
several Asian countries, including the Philippines (actually the
countries available as extracts from GeoFabrik, China, India, Pakistan,
Vietnam, etc.except Japan - considering dataset size). Surfaces tagged
as "compacted", "gravel", "sand", "dirt", "earth", "ground", "grass",
"mud"... are also considered as "unpaved", following the wiki page.

Examples from areas that may be of interest on this list:

- Port-au-Prince, Haiti:

- Kigali, Rwanda:

- one of the examples given by Douglas, in Kampala, Uganda:

- A page for Colombia, with markers for the GeoRSS feed from la Sala de
Situación Humanitaria Colombia:

Following Humberto's suggestion, flood_prone areas are also rendered
("flood_prone=yes" or "flood_prone=label"):

Following a suggestion from Federico, and a need that had also appeared
for Haiti, next step should be rendering of POIs relevant for
emergencies, such as health facilities, at lower zoom levels.

The global URL is:

OSM.org Mapnik layer is in the menu for easy comparison on the current
area. A "hybrid map for mappers" - and for soon-to-be mappers who can
see what might be missing on the map ;) - is available by overlaying a
transparent version of OpenUnpavedStreetMap with Bing aerial imagery.
Google satellite imagery is also available as a reminder, by comparing
imageries location, that it is often advised to adjust Bing offset
before tracing.

The database is updated at least daily, and minutely for the next days,
after the new coverage will have been imported.
Tiles are available from
The current bandwidth is limited, but if you are interested, let me know.

Let me know what you think, and if there are features that would be
interesting for a custom rendering.

Best wishes,


[1] https://wiki.openstreetmap.org/wiki/Key:surface
[2] http://trac.openstreetmap.org/ticket/1447

gpg 0x5939EAE2

HOT mailing list
HOT at openstreetmap.org
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