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58 lines
2.2 KiB
Markdown
58 lines
2.2 KiB
Markdown
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[](https://godoc.org/github.com/flopp/go-coordsparser)
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[](https://travis-ci.org/flopp/go-coordsparser)
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[](https://goreportcard.com/report/flopp/go-coordsparser)
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[](https://github.com/flopp/go-coordsparser)
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# go-coordsparser
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A library for parsing (geographic) coordinates in go (golang)
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# What?
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go-coordsparser allows you to parse lat/lng coordinates from strings in various popular formats. Currently supported formats are:
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- **D** (decimal degrees), e.g. `40.76, -73.984`
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- **HD** (hemisphere prefix, decimal degrees), e.g. `N 40.76 W 73.984`
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- **HDM** (hemisphere prefix, integral degrees, decimal minutes), e.g. `N 40 45.600 W 73 59.040`
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- **HDMS** (hemisphere prefix, integral degrees, integral minutes, decimal seconds), e.g. `N 40 45 36.0 W 73 59 02.4`
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# How?
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### Installing
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Installing the library is as easy as
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```bash
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$ go get github.com/flopp/go-coordsparser
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```
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The package can then be used through an
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```go
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import "github.com/flopp/go-coordsparser"
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```
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### Using
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go-coordsparser provides several functions for parsing coordinate strings: a general parsing function `coordsparser.Parse`, which accepts all supported formats, as well as specialized functions `coordsparser.ParseD`, `coordsparser.ParseHD`, `coordsparser.ParseHDM`, `coordsparser.ParseHDMS` for the corresponding coordinate formats.
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Each function takes a single string as a parameter and returns an idiomatic `lat, lng, error` triple, where `lat` and `lng` are decimal degrees (`float64`) with -90 ≤ `lat` ≤ 90 and -180 ≤ `lng` ≤ 180.
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```go
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// parse any format
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s1 := "..."
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lat1, lng1, err := coordsparser.Parse(s1)
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if err != nil {
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fmt.Errorf("Cannot parse coordinates string:", s1)
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}
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// parse specific format, e.g. HDM
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s2 := "..."
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lat2, lng2, err = coordsparser.ParseHDM(s2)
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if err != nil {
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fmt.Errorf("Cannot parse coordinates string:", s2)
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}
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```
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# License
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Copyright 2016 Florian Pigorsch. All rights reserved.
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Use of this source code is governed by a MIT-style license that can be found in the LICENSE file.
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