Grid Mapping starter kit
A starter kit for Electrical Transmission Grid Mapping in OpenStreetMap, combining Osmose and Overpass with JOSM.
Setup JOSM on your device 
1. Install Java on your device if not installed.
2. Install JOSM on your device.
3. (Optional) If you want preconfigured preferences, download this preferences.xml file and paste it in the correct folder on your device. The JOSM wiki provides details on where to place it.
4. Add our custom paint style which you can find here. To add to JOSM, go to Edit>Preferences>Map Paint Styles and press the "+" in the top right. Then you can paste this URL or the file saved on your device.
5. Download this template session, and in JOSM go to File>Open and open the .joz file.
6. Create an OSM account if you don't have one. Once you do, go to Edit>Preferences>OSM Server and press authorise now. Login with your OSM account, and authorise. Your account is now linked to JOSM on your device.
7. Finally, activate "expert mode" in View>Expert mode. This will enable using Overpass API. Also, make sure remote control is enabled in Edit>Preferences>Remote Control. You will need this enabled for the next step!
Loading power infrastructure into JOSM 
1. Make sure remote control is enabled, and then just go to the start mapping page. Here you can click on the country you want to map, and it will directly open JOSM and load the data of that country.
How to Map and upload your progress 
1. For ease of mapping, customise your toolbar with presets if you have not used the default preferences. Edit → Preferences → Toolbar. Then select the Presets → Man Made → Man Made/Power and add power towers, power portals and other presets for your mapping acticity.
2. Start Mapping. Read more about the general mapping process in JOSM. Place nodes (eg.power towers, power portals) or place polygons to delimit an area (eg. substation, generator), and press on the preset structure you want it to be. If you want to learn how to map fast, go to the advanced kit tab!
Example: As seen in the image to the right, the red polygon is a substation which is mapped by adding nodes that are connected to each other and tagged as a substation.
3. Whilst having the OpenStreetMap layer activated, press the green Upload arrow. Avoid ignoring validation results. The only acceptable warning when uploading data is "Possible missing line support node within power line". When you make an edit, please use the #ohmygrid in the changeset to help the initiative!
Common Mistakes 
1. Do not use the interactive map or the default queries for distribution grid mapping. The Overpass Turbo script provided with this starter kit and present in the interactive map is optimised for transmission grid mapping. Lines on towers below 90 kV are not visualised in JOSM and should not be mapped with the standard configuration of this script.
2. Not reading about good practices.
3. When you leave the downloaded area, you may find transmission grids that do not appear to have been mapped. Actually, they were not downloaded to JOSM and you map them 2 times. To avoid this always be aware of the country boundary and be careful when crossing highlighted dashed orange lines. Due to the design of Overpass Turbo, some elements such as power lines may still be visible. across the border, but other objects such as substations will appear as if they have not yet been mapped.
4. Mapping beyond your experience is something you should avoid. Mapping is an iterative process and you should not expect to be able to finish all the details you are mapping. If you cannot map with a high degree of certainty, leave it to local mappers, better satellite imagery or experienced grid mappers.
Mapping Regulations
⚠️ Before you start mapping, please find out about the mapping restrictions in the respective country. In some countries, the mapping of transmission lines is not permitted. Get in touch with local users by finding out about local projects. ⚠️
⭐ More info can be found at the repository