Cool, thanks for clearing it up!
When you are using JOSM, you can specify explicitly the source of the data you are committing (i.e. "survey"). In iD, this info can go into the normal comment.
By the way, I can really recommend JOSM, it is very useful for power users.

Hi Saturngod

I noticed that you split the Pyay road with oneway=no in two roads with each oneway=yes (and I think others too).

This is correct if and only if the two opposite lanes are physically separate from each other, for example by a grass strip, trees or by a concrete barrier.
The implication is that it is impossible to cross from one lane to the other except where explicitly a connection is made.
To illustrate at the example of Pyay road, coming from Ma Kyee Kyee Street or Mahar Myaing Street, this would mean that you can only turn right, driving south. Same with Ma Po Street or Shan Kone Street.

It is not correct if the separation between these lanes is only a road marking.

This is actually an important detail, as it very much affects the routing for navigation software.

So, to wrap it up: from the Bing satellite imagery, it looks like the separation is only a road marking, which would mean that your change is wrong. If you know for sure from a different source that the lanes are truly separate (i.e. because your surveyed it yourself or saw a current photo), then I'd recommend to write this into your changeset comment in order to keep others from eventually reverting it because they think it is an error.

(For example the U Wisara Road just North East of Pyay Road is correctly split up into two seperate oneway roads because there are tree rows between the lanes.)

Cheers
Tobias

I can help you finding the correct tags for this "Karuna Daw SeKan (Clinic)". Could you tell me what this should be? Is it a churchyard, a church, a clinic or something else still?
The current tags don't seem to be correct.

Are you sure the Kannar Park is at the place you added? From satellite imagery, it looks like the area immediately South of the area you tagged is a park

Oh, that's cool. The "source supreme". If the mentioned way is just a footpath, I think many residential ways I tagged as residential roads in the outskirts of Yangon will turn out to be just footpaths.

Do you know if the Heineken brewery is only on the East side of the main road or also on the West side?
(Newest satellite imagery shows an industrial area also west of this road, which looks quite similar as the brewery)

You changed the way along the Hlawga lake into a footpath in this changeset. What is the source of this information?
The newest satellite imagery shows a road of at least 5m width. (MapBox imagery is newer than Bing imagery in the Yangon region, I am not sure if you can see it in Potlatch)

Hi NayZarAung

You changed the classification of Pyi Htaung Su Road to primary. Why do you think this should be classified as a primary road?

Yes I totally get the point of the guy who wrote that into the wiki. Though I think the assumption that stands behind that guideline is less valid for Myanmar. I.e. I believe borders are officially set in text form ("up Pazadaung Creek until Nga Moe Yeik, then...") rather than in cadastre form.

But still, thanks for the info, I will review my borders to take this into account

All duplication except for the townships involved in data discrepancy between MIMU and wikipedia (South Dagon, Dagon Seikkan and East Dagon) are resolved now.

I tend toward using the MIMU data because
1. it fits to the other parent level MIMU data - using wikipedia data would leave a hole where it is unspecified what township an area belongs to
2. I have a hunch that the wikipedia data may be originally based on a copyrighted map even though it claims not to (it claimes to be based on openstreetmap)

Another discrepancy which needs to be resolved now. Which of the two is correct might be guesswork, but we need to decide on one now to remove the duplication. These two relations describe the same township:
wikipedia data: "East Dagon" relation/5834432#map=13/16.9149/96.2883&layers=N
MIMU data: "Dagon Myothit (East)" relation/5996591#map=12/16.9476/96.2663

See also this note where I already did a bit of research: note/496215

What is your opinion?

For a moment I panicked in the fear of OSM conflicts, but Yangon city level is 4 *phew*. So I am merging admin-level >= 4.

Discrepancy 1: The imported data splits Yangon into "Yangon, West" and "Yangon, East" while the previous data (derived from information on Wikipedia) splits Yangon into 4 districts - North, West, East, South. So, which one is correct, wikipedia or import (=MIMU?)? At first glance, it looks like MIMU data "Yangon, West" coincides with wikipedia data "Western District" + "Northern District" and MIMU data "Yangon, East" coincides with wikipedia data "Eastern District" + "Southern District". If this is the case, I suggest we take the wikipedia data as it seems to be more precise.

I added the districts one after another in different changesets. Affected are the borders of every township in Yangon Eastern District ( see https://en.wikipedia.org/wiki/East_Dagon_Township#/media/File:Yangon_Districts_and_townships.png ) except for North Okkalapa Township. So this is Botataung Township, Dagon Seikkan Township, East Dagon Township, North Dagon Township, Pazundaung Township, South Dagon Township, South Okkalapa Township, Thingangyun Township. But nevermind that, I am currently merging the borders of the imported data with the one I added earlier. Though, there are some discrepancies. We have to decide which version of the data should be used on OSM (see next message).

Oh well, since I am the only one who started adding the administrative boundaries to Yangon, I will take on the merging of the duplicated data. So, no action required from you, but please be more cautious of existing data when importing datasets in the future.

Most districts of Eastern Yangon (work in progress) already have an administrative boundary on the map which is also more detailed as the one you imported. So the information you added is duplicate.

You did not only align the road to aerial imagery but also changed the classification from trunk to primary. Why?

Usually, bypass roads do have a higher classification than the road it should bypass.

What do you mean with "52 St. Makami Area"?

If it is a muslim neighbourhood, then the correct tag is to tag it as place=neighbourhood. I just went ahead and did that, please get back to me if I understood this wrong.

Vielen Dank! Bald habe ich Dagon durch :)

Regarding the Yazadirit Road: Are you sure that this is a one way road all the way that goes to the west (and not the east)?

What about the road that goes right parallel to it, is it also named Yazadirit Road and is it also a one way road (into the other direction I presume)?