[QGIS-Developer] QGIS, DateTime and TimeZones

[C Hamilton]

I am interested in shrinking if possible, but am afraid that that may
reduce the accuracy. I first looked at the Natural Earth Timezone Shapefile
(
https://www.naturalearthdata.com/http//www.naturalearthdata.com/download/10m/cultural/ne_10m_time_zones.zip),
but it really does not provide the accuracy.

Time Zone Finder uses the Time Zone Boundary Builder's data. It's data size
is 47 Mb so they are compressing it.

Calvin

On Mon, Nov 9, 2020 at 10:28 AM Richard Duivenvoorde <rdmailings at duif.net>
wrote:

> On 11/9/20 3:48 PM, C Hamilton wrote:
> > This all sounds good to me. I am guessing that we will not be able to
> get around a fairly large data set because of the need to keep the accuracy
> of the boundaries. There is a project called Timezone Boundary Builder (
> https://github.com/evansiroky/timezone-boundary-builder) that is a
> detailed polygon of the time zones based on OSM data with one attribute
> which is the time zone.
>
> Mmm, 100Mb (both as gpkg and shp and 65Mb as zipped shp. Are there any
> shrinking pills (algo's) available for those? Else maybe make it an
> alternative download? Though that complicates stuff probably.
>
> Googling about d3js and timezones (hoping the Math-people maybe had better
> idea's), I found:
>
> https://bl.ocks.org/mbostock/9234731/1ed485516e30474ad75ec115c928bc175683ae58
> pointing to http://efele.net/maps/tz/world/tz_world_mp.zip
> which is a lot smaller (but lacks the buffer into the sea/water). Ah, no
> longer maintained: http://efele.net/maps/tz/ :-(
>
>
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