As the openstreetmap-carto updated, My pull request (#2687) now live on OpenStreetMap. Now the name from railway will be slightly rendered.

A three-level rendering is set (z11 for highspeed, z14 for main lines and z17 for all) to make it impact less to other elements.

After visiting Tokyo in July 2017, I found out that most of the rendering for OpenStreetMap is not that friendly to a railway-centric urban area, so I came with this request trying to fix that.

This is how Tokyo looks like, before and after, in z14:

Before

… See full entry

Update: Thanks Operations for blazing quick response, new FreeType is on the server and rendering should back to normal after cache invalidated.

:D

---

After the Noto CJK finally landed in the Standard layer, Boldness issue became a major problem for them.

Investigation by ` vholten` proved it was caused by the old FreeType version (2.6.1) in the rendering server, but it seems there is no easy or safe way to fix the issue.

• Converting to (Cubic) OTF to (Quadratic) TTF will take very long time and the result may not be loseless.
• Upgrade newer FreeType via third-party PPA, or patch and build old FreeType from apt-get source will work, but dangerous and will become a maintenance hell.

Maybe we should give up on fixing it until we can get newer Linux distro?

Noto CJK is still missing in Standard Layer for now (#2391), to help people understand what is missing, this is how the font should like after the pull request:

… See full entry

The CJK fonts seems to be missing in the standard layer, as the map in Asia looks strange.

I guess the Noto fonts that new openstreetmap-carto supported is missing in the server, so the Asian font uses the Unifont as the fallback.

Can somebody take a look and fix that?

Recently I had worked on a simple server that will import the bus stop data from the New Taipei City government and generate map tiles to be used in JOSM, as they seemed to change their license to be compatible. The result is now available on GitHub.

Historically it was hard to implement a feature in the Transport Map: Group near bus stops with the same name. But after a lot of research, I found it is not hard again: PostGIS 2.2 added friendly spatial clustering functions!

So the problem can be mostly solved by one line SQL command now:

INSERT INTO ntpc_stop_group (convex_hull, name)
    SELECT ST_ConvexHull(unnest(ST_ClusterWithin(ST_Buffer(location, 0.0003), 0.001))),
        name from ntpc_stops GROUP BY name;

Use ST_Buffer to generate circles centered at every stops, use ST_ClusterWithin to place them into groups, finally using unnest and ST_ConvexHull to generate the resulting polygon.

The current result looks great and I think further optimization is still possible. :)

The Open Data movement in Taiwan is growing fast. In July, after half year of discussions between authorities and communities, the data.gov.tw platform released a new, permissive, CC-BY convertible open data license. It is a game changer for the open data community, and now for the OpenStreetMap Taiwan mappers.

In this week, the National Land Surveying and Mapping Center, or the NLSC, announced open data edition of Taiwan e-Map under new open data license. The zoom level of the open data edition is limited to 1/18000 or z15, but it already contains a lot of data that is not available in any other sources.

Great quality of NLSC maps

And most importantly, the accuracy of NLSC maps is superior. Take a look at it with Strava Heatmap. It is accurate not only for the downtown:

… See full entry

The satellite imagery from Bing had updated today, some areas previously unable to trace now appeared, but most of the areas in Taiwan are now unavailable :(

I think it may be still processing but I am not sure. Hope the most of the imagery can be back soon…

A lot of mappers in Taiwan including me are noticed that OSM tiles are down in JOSM, but it look OK in the website.

After some investigation, I found out that HTTP tiles are working but not HTTPS. Accessing https://a.tile.openstreetmap.org/ from my network in Taiwan will hang until timeout.

Is this a known issue and is there any workaround?