Change 409395 had a related patch set uploaded (by Mooeypoo; owner: Mooeypoo):
[mediawiki/extensions/Kartographer@master] Add support for zoom level 19 in Kartographer

https://gerrit.wikimedia.org/r/409395

Verified that the zoom level is capable of one more level, but beyond that, the network tab shows the request asking for zoom level 19 as max level:

:path:/osm-intl/19/83867/202626.png

As opposed to before this patch, request for max zoom were for

:path:/osm-intl/18/41935/101315.png

@Gehel I want to make sure I am not missing anything, can you confirm that this is the correct path change? The map I tested locally requests higher zoom and displays it, so it seems correct, but I just want to make sure I am not missing any usage or definition that I am unaware of. Thanks!

(This is step 1, I need to add support for Mapframe embedding and maplink zoom parameter next.)

As per @Mattflaschen-WMF, the full test for all zoom19 implementation should include

• Mapframe embedded view (includes the pre-set zoom parameter) (works with above patch)
• Mapframe expanded view (works with above patch)
• Maplink zoom parameter
• maps.wikimedia.org accepts 19 as zoom URL parameter.
• maps.wikimedia.org +/- buttons

• mapframe zoom parameter

Change 409395 merged by jenkins-bot:
[mediawiki/extensions/Kartographer@master] Add support for zoom level 19 in Kartographer

https://gerrit.wikimedia.org/r/409395

snapshot service needs to accept zoom 19 too.

In T186779#3959166, @MaxSem wrote:

• mapframe zoom parameter

Aye, I included it in the "Mapframe embedded view (includes the pre-set zoom parameter)" -- that part works with the patch.

In T186779#3959563, @Yurik wrote:

snapshot service needs to accept zoom 19 too.

Can you elaborate? Which snapshot service? Where do we update?

The preliminary testing shows working data-zoom=19 parameter.

The following test cases worked:

• inserting

<mapframe text="Downtown [[wikipedia:San Francisco|San Francisco]]" width=250 height=250 zoom=19 latitude=37.8013 longitude=-122.3988 />

will show

• going through zoom levels shows all levels successfully

In T186779#3958987, @Mooeypoo wrote:

Verified that the zoom level is capable of one more level, but beyond that, the network tab shows the request asking for zoom level 19 as max level:

:path:/osm-intl/19/83867/202626.png

As opposed to before this patch, request for max zoom were for

:path:/osm-intl/18/41935/101315.png

@Gehel I want to make sure I am not missing anything, can you confirm that this is the correct path change? The map I tested locally requests higher zoom and displays it, so it seems correct, but I just want to make sure I am not missing any usage or definition that I am unaware of. Thanks!

Yep, the path above looks correct! Thanks!

The path resolved to the production service is https://maps.wikimedia.org/osm-intl/19/83867/202626.png which renders correctly. So all looks good.

snapshot service might not allow z19, but this is probably in a config somewhere.

Checked in betalabs for mapnik and mapframe - zoom 19 is enabled. However, last two upper zoom levels (10000 km and 5000 km) do not provide much info:

The issue above seems to be unrelated to the scope of the task though.