The focus of this project is to map basic elements: streets and buildings, inside areas of informal settlements in Brazil (such as small villages, slums, and similar irregular occupations).
There's few public data about the interiors of these areas.
To map properly, please read carefully the following brief instructions.
This mapping is relatively simple, but it requires care and attention.
- Entities to Map
- ways (highway=*) and buildings (building=*)
- Changeset Comment
- #AniversarioXIII_Latam #Assentamentos_Informais #Brasil #Nordeste-BA-SE-AL #FOSMco76 When saving your work, please leave the default comment but add what you actually mapped, for example "added buildings and a residential road".
Firstly: when opening the editor, set the background image by clicking
b and select
Check in the selected area if streets (
building=* are already mapped:
A) If already mapped: do not add more data; please just mark the task as
done, and then move on to others.
B) If streets or buildings aren't mapped: before starting, check the correct alignment of the image in the area with the GPS layer, if available (on the right pannel of iD editor); if necessary, adjust imagery.
1) WAYS: The focus is to map ways (streets, etc) that allow vehicles, easier to identify.
-If they are already mapped: please move to the buildings (or if necessary, carefully realign already mapped ways).
-If they are not yet mapped:
Map only what, and as far as, you can see clearly. If the image is not good or you can't clearly identify ways, do not map them. Map only ways (streets, etc) that may be in at least 01 connection with other existing ways around. Do not leave short, loose, unconnected stretches. Do not leave nodes of ways connected to buildings. For ways with less than 10m radius, 03 nodes are usually enough.
Use the following tags:
1) Narrow ways where there is sign of vehicle access:
2) Ways where there is common access of vehicles, without sidewalk, where people transit through the vehicles:
3) More regular streets, with sidewalks:
4) Ways leading to the field or outside the community:
In all cases, if "unpaved", add:
Use closer zoom to map it. Draw building following the contour of the roof (or coverture), orthogonally even when some part of it is under the cover of the trees. After completing the polygon, you can use the
S key to square the object's angles.
Tag it with
Take also a look on the shadows, to help on distinguishing roofs from what may be floor area or even walls.
If the image is not good and you can not identify roofs, do not map them.
-If contiguous roofs are touching each other, draw them with joined nodes;
-If they are not touching each other, draw them apart, not joining their nodes.
ALT key helps prevent neighboring nodes from joining while you draw.
In case of mistakes, just click
undo, or cancel the edit, not saving it.
If you need to interrupt the mapping, just save the edit, click
stop on the task,
leaving a comment of what you have mapped (ex.: "mapped buildings at east"), for others who continue it later.
For any questions, plase contact brazilian commnunity at: https://lists.openstreetmap.org/pipermail/talk-br/