#1009 - Nepal Earthquake, 2015, Gorkha, Residential areas and buildings (Archived)

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This project was archived.

  • Author: Humanitarian OpenStreetMap Volunteers
  • Requesting organization: International Response community
  • Priority: Urgent
  • Imagery: MapGive / HIU

The international community is responding rapidly. The international disasters charter has been activated. We are also coordinating with international organizations and the DHnetwork.

As of Sunday April 26, more than 2,000 deaths have been reported. Communications are difficult and there have been many aftershocks.

For this task, we will add residential areas and buildings.

Imagery Through the MapGive project, the Humanitarian Information Unit (HIU) of the U.S. Department of State is providing the OpenStreetMap community access to updated satellite imagery services to help assist with humanitarian mapping.

Created by PierZen - Updated - Priority: medium


Changeset Comment
#hotosm-nepal-earthquake-1009 #MapGive Source=WorldView-2, DigitalGlobe, NextView, 25 Nov 2013 & 08 Apr 2015
When saving your work, please leave the default comment but add what you actually mapped, for example "added buildings and a residential road".

[imagery url available only after accepting the license]

Access to this imagery is limited by the NextView license agreement.

You need to review and acknowledge the agreement.

Entities to map

  • Trace polygons around residential areas - tag landuse=residential
  • Trace all building polygons - tag building=yes use the button to orthogonalize (square angles)

Note : In remote areas, look carefully to find all the buildings. You can find remote hamlets very isolated from the rest of villages. When you find hamlets, assure that a path or road connects to this residential area.

Often in the mountains, only paths exist. Trace these paths and assure to connect them to the road network.

Do not trace all the paths in the fields or small paths of a few hundred meters that do not connect to road networks. This makes it more difficult to read the map and identify the important paths.

Imagery Detail

This imagery is from Digital Globe’s WorldView-2 satellite taken from multiple images acquired in 2013 and 2015. The northern section was shot on 25 Nov 2013 and the southern sections were shot on April 2015. The images are orthorectified for terrain corrected geographic precision. Additionally, the images have been contrast stretched using a custom stretch and processed into a Tiled Map Service (TMS) for performance.

Road tagging guide

From Nepal roads page on the wiki

  • highway=primary Road corridors that carries a huge volume of traffic between arterial roads and has a high density of public transport services. These roads often connect two relatively distant localities in urban areas.
  • highway=secondary Collector roads that carry lower volume of traffic and has either no public transport service or a lower density of public transport service. These roads often connect two neighboring/nearby localities in urban areas.
  • highway=road Roads traced from satellite imagery for which a classification has not been determined yet. This is a temporary tag indicating further ground survey work is required.
  • highway=residential General residential roads in a planned locality. Wide enough to carry slow moving residential traffic.
  • highway=service Generally for access to (or inside) a building, industrial estate, universities, parks, etc.
  • highway=pedestrian Roads that are almost exclusively used by pedestrians and are out of bounds of motor vehicles in normal conditions, such as plazas and squares.
  • highway=track Unpaved motorable tracks

Also, look out for pedestrian suspension bridges. They are common and can look like this. Tag as: bridge=suspension / highway=footway / layer=1

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