#2673 - Peru Flood Support 1: Morropon

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HOT is supporting the local OSM community in Peru to improve the basemap in areas affected by recent flooding.

This project may not be easy for beginners as it involves mapping multiple features and preserving connectivity of the road network and waterways across task squares. The project is to provide a complete road network, all major waterways and all residential areas.

See this wiki-page for more information: 2017 Floods in Peru

Created by russdeffner - Updated - Priority: medium


Entities to Map
Road network, buildings, waterways and residential areas
Changeset Comment
#hotosm-project-2673 #Peru #PeruFloods2017
When saving your work, please leave the default comment but add what you actually mapped, for example "added buildings and a residential road".

Project Specific Mapping Instructions

  • Many of the squares in a project may already be partially or fully mapped. In this case map more if needed or fix up the existing mapping. Mark it "Done" in the Tasking Manager (TM) if the square is already complete
  • Connect or join roads that are not connected to the main network or nearby roads. Roads that are near to each other but not connected may create validation errors. In addition, connected roads improve map routing
  • Disconnect roads that are attached (overlap?) to landuse=residential areas. Draw them into the settlements and connect them to other roads that enter the settlements

Roads and Paths

  • Please map roads and major paths as completely as possible by connecting them to the main road networks where ever possible
  • Very short segments that do not connect to anything should not be mapped
  • Short segments of a road or path that you cannot see through the trees but seem very likely to exist should be mapped to keep the road complete
  • Map a little beyond your task square so the person who maps the task square next to yours can easily connect them
  • Always connect roads to other roads where they meet and never end roads on Residential area edges
  • See https://wiki.openstreetmap.org/wiki/Highways for information on road classification

Waterways, Bridges, Fords, Dams

  • waterway=stream and waterway=river - If you see obvious waterways, please map them. They are usually much lighter color, grey than roads/paths and you can often see rocks and split channels. Much like the road system, please find where the waterway connects to the main waterway network and map it to connection. Mapping waterways implies a direction as well so zoom out, look for already mapped waterways nearby, or use the OpenCycleMap background layer to help determine which direction the water flows.
  • bridge=yes - This tag is placed on a segment of road that is just the same size as the bridge and also needs a tag that says layer=1 to indicate it is above the waterway. The waterway and the road do NOT share a node.
  • ford=yes - If you see a road crossing a waterway try to confirm a bridge or a ford. Fords are places where the road just drives through the waterway. To map a ford, have the waterway and the road DO share a node and put the ford=yes tag on that one single node.
  • waterway=dam - Dams are a little confusing to map, please see the references listed below and ask a more experienced mapper to help you. But they are important to map if you can identify them.

Residential Areas

  • Please draw one large area outline around groups of buildings and tag them landuse=residential
  • About five or more buildings can be outlined as a landuse=residential area
  • Please keep the outline close to buildings and do not include a lot of farmland or forest
  • When to draw the residential area outline takes some judgement, but when in doubt, draw an outline around the settlement and ask for feedback on your work

  Start contributing

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