Hello.  
First of all, thank you so much for mapping on this project
Why this message? A team of validators reviews mappings to check if the mappings are according to the instructions and are free of errors, 
Especially we pay attention to new mappers work to help them to avoid often made errors and provide guidance on how they can improve their mappings.

## In general, your mappings are fair.
A number of buildings You’ve mapped are not proper squared and inaccurate (oversized)mapped.
Pay more attention on accurate drawing the building and square each building with the Q key

* An advise, please map as accurate as possible, with corners, porches etc. Zoom in as close as possible. 



We hope that this information is helpful to improve the quality of your mappings.

Thank you for helping the Humanitarian OpenStreetMap Team (HOT).

Frans S

*****HINTS & TIPS *****
* Sometimes, the project the TM manager imagery is very vague and bad to map from.
 Use another Imagery like Maxar P imagery. 

It is the most recent and shows more details where you can map from. Align it with the TM imagery (correct offset) and map all objects you can see. Then switch back to the TM Imagery and map the rest (mostly newer build or expanded buildings).
* Don't cluster a group of buildings by making it 1 building
* Always square your building (use the Q key in ID editor) except round huts and curved walls of course
* Don't connect buildings with nodes to highways (which is an error, roads do not go through buildings). 
* Avoid connecting nodes of buildings to each other. (They mostly do not share walls).

* If you are new to HOTOSM, this webpage is worth reading
https://www.openstreetmap.org/user/bgirardot/diary/36235
For the Tanzania projects these are very helpful as well

Please see here for new mapping instructions   
https://drive.google.com/open?id=1bS_TVHPFHKKVBSdjx3RRQdxhdWrMJ3wdEh_BSnsL4hI                   

 https://drive.google.com/open?id=1N1rXlAyGcJ6VJ2p3qbD4PRsuo65o3pC5yHB2wq1TGEc
siwilde | GSuite Presentation 

* Searching for and identifying of buildings is sometimes difficult. When you are mapping, switch on and off OSM data layer (shortcut ‘W’”) and zoom in and out as far as possible (Check which Image you can use) so you are sure not to overlook buildings, (often partly hidden under trees)

* Please take a look to this pages.

http://learnosm.org/en/hot-tips/tracing-rectangular-buildings/

https://learnosm.org/en/hot-tips/

* Check the Offset of the image you use. See instructions on TM3 to see how to do that

* If necessary, try to zoom in further. When you see white spots on your image, zoom out till the object are visible as well, or try another image. When working in JOSM, switch off the automatic zoom. (Right mouse button, check auto zoom off)

* When mapping buildings partly hidden by trees do not follow the outlines of a tree but extrapolate the building picture.  Often there is a shadow on the ground near a building. Don' include these in your mapping.
*Communicate with HOTOSM
HOTOSM has a workspace and communication channel on SLACK
When you are interested, please ask for an invitation at SLACK HOTOSM
http://slack.hotosm.org

