timezone-boundary-builder
bstokml
Our great sponsors
| timezone-boundary-builder | bstokml | |
|---|---|---|
| 7 | 1 | |
| 818 | - | |
| - | - | |
| 8.0 | - | |
| about 1 month ago | - | |
| JavaScript | ||
| MIT License | - |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
timezone-boundary-builder
-
Falsehoods programmers believe about time zones
They don't really bother me. They aren't AI spam, and some folks may enjoy them. It's pretty easy to not click on a link, for me.
TZ are a fun project. I found that it's difficult to translate a long/lat into a TZ ID, so I wrote this[0].
Works a charm. It's based on the Timezone Boundary Builder[1].
[0] https://github.com/LittleGreenViper/LGV_TZ_Lookup
[1] https://github.com/evansiroky/timezone-boundary-builder
-
SpatiaLite: Library extending SQLite to support Spatial SQL capabilities
I wrote a tutorial on SpatiaLite here: https://datasette.io/tutorials/spatialite - "Building a location to time zone API with SpatiaLite"
It shows how to use SpatiaLite + Datasette to build an API that can tell you what timezone a latitude/longitude point is in, using data derived from OpenStreetMap via https://github.com/evansiroky/timezone-boundary-builder
Here's a demo: https://timezones.datasette.io/timezones/by_point?longitude=... - add ".json" to the URL for the JSON output.
- Does a country's legislated time zones extend to the limit of its territorial sea or its exclusive economic zone?
-
Falsehoods programmers believe about time
I have never had an opportunity to deploy this tool, but here's a program for generating a TZ shapefile from OpenStreetMap data:
https://github.com/evansiroky/timezone-boundary-builder
In principle a calendar program could use its output to perform GIS lookups of locations then use the tzinfo DB to get the correct timezone at the given location and specified time.
-
How can I get a user's timezone based on location and create a DateTime() based on that timezone?
You could ask google. Amazon or Microsoft probably offer similar APIs. Or you can do it yourself. It's a very complicated topic, though.
-
Big problems at the timezone database
There is a separate timezone boundary builder which maps geography to timezones using a shapefile, and the shapefile is >35MB uncompressed. By comparison the latest tzdata is 1.2M uncompressed.
- how do i konw the datum for a country? in postgis?
bstokml
-
SpatiaLite: Library extending SQLite to support Spatial SQL capabilities
I used this wonderful library when I need to answer how close the airplanes were over my head for safe UAS operations on the ground.
This was near an uncontrolled airport (no tower) so the airspace and general legal limit was 400 ft AGL but I recorded aircraft as low as 175 ft AGL on their down wind leg of the landing approach.
The tool gathered ads-b data from the aircraft using an rtlsdr, then let me plot it on Google Earth for analysis. Was really useful to me at the time and a fun way to learn a little about GIS.
https://gitlab.com/btreecat/bstokml
What are some alternatives?
geolocator - A utility for getting geo-location information via HTML5 and IP look-ups, geocoding, address look-ups, distance and durations, timezone information and more...
OpenRailwayMap - An OpenStreetMap-based project for creating a map of the world's railway infrastructure.
openinframap - Open Infrastructure Map
js-joda - :clock2: Immutable date and time library for javascript
awesome-falsehood - 😱 Falsehoods Programmers Believe in