https://github.com/tzneal/coordconv
MGRS/UTM/UPS Coordinate Converter (partial port of NGA's geotrans)
https://github.com/tzneal/coordconv
go golang mgrs ups utm
Last synced: 5 months ago
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MGRS/UTM/UPS Coordinate Converter (partial port of NGA's geotrans)
- Host: GitHub
- URL: https://github.com/tzneal/coordconv
- Owner: tzneal
- License: unlicense
- Created: 2018-10-08T20:41:24.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2018-10-09T01:33:52.000Z (over 7 years ago)
- Last Synced: 2025-08-14T00:34:42.558Z (10 months ago)
- Topics: go, golang, mgrs, ups, utm
- Language: Go
- Size: 834 KB
- Stars: 15
- Watchers: 3
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE.md
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README
coordconv
=========
coordconv is a manual port of the Geotrans 3.7 MGRS conversion code from C++ to
Go. It also makes public the UTM and UPS converters as well as the underlying
transverse mercator and polar stereographic projections.
It has been tested with 4million+ points uniformly spread across the globe and
returns identical results to the standard Geotrans library. The unit tests
included contain an abbreviated test table at testdata/geotrans.log with 40,000
points which was generated with the included geotrans_table_cpp. It can be
modified and used to regenerate the included geotrans.log, or a more
comprehensive one if desired.
Usage
=====
Constructors are provided so you can use custom ellipsoid parameters, but defaults are
provided for WGS84:
```go
mgrs, _ := coordconv.DefaultMGRSConverter.ConvertFromGeodetic(s2.LatLngFromDegrees(0, 0), 5)
fmt.Println(mgrs) // 31NAA6602100000
geo, _ := coordconv.DefaultMGRSConverter.ConvertToGeodetic("16SGC3855124838")
fmt.Println(geo) // [33.6366624, -84.4280571]
```
License
=======
The [geotrans code](http://earth-info.nga.mil/GandG/update/index.php?action=home#tab_wgs84-data) is public domain, so in spirit this is public domain as well. I only made minor changes along the way to make it behave a bit more like like standard Go code (e.g. returning an error when the C++ code threw an exception)