[OSM-dev] OpenStreetMap Cartographic: A client-side rendered OpenStreetMap Carto

[Mateusz Konieczny]

I just wanted to thank you for
working on this.

(Sadly I have no useful comments,
hopefully such message is ok)

11 Jun 2020, 05:32 by dev at openstreetmap.org:

> I've been busy with
>
> On 2020-05-24 10:26 p.m., Joseph Eisenberg wrote:
>
>> Thank you for making this, it looks like a lot of work!
>>
>> These client-side vector tiles at z8? (https://pnorman.dev.openstreetmap.org/cartographic/mapbox-gl.html)
>>
>> My laptop (2015 Macbook Pro, 16 GB RAM, 2.2 GHz Intel Core i7) appears to use some effort to show areas with a large amount of data,
>> For example if I view England + Wales on z8 and then move over to the Netherlands and then to Germany, at z7 and z8,
>> CPU usage goes up to >100% for a time, and there is a noticeable delay. Perhaps part of this is a delay in serving the tiles?
>>
>
> I turned on Content-Encoding based compression which cuts the bytes transferred in half. This helps significantly.
>
> In general vector tiles have more large tiles, even if the average tile size is the same. The largest z8 tile in the area is 1MB transfer size while an average weighted by requests on the tile.osm.org level 2 cache is 189k uncompressed. For comparison, four z9 raster tiles from tile.osm.org are about 200kb, a fifth of the bytes transferred. Retina tiles would decrease the size different.
>
>
>
>
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