[ANN] Go geospatial libraries: geometries, GeoJSON, WKB, KML, PostGIS, GPX, polyline

[Tom Payne]

A quick announce of a few libraries for geospatial applications that are now mature and battle-tested:

https://github.com/twpayne/go-geom : efficient geometry library, using a high-performance cache-friendly data representation (more info), with import and export from multiple formats (e.g. GeoJSON, WKB, KML) and many 2D geometry functions. Really easy PostGIS integration with database/sql.

https://github.com/twpayne/go-kml : generate KML files quickly and flexibly.

https://github.com/twpayne/go-gpx : read and write GPX files.

https://github.com/twpayne/go-polyline : encode and decode data to/from Google Maps Polyline format.

I think that go-geom's internal data representation is a nice example of high performance Go code and a reasonable attempt at practical code while the language does not support generics.

All feedback welcome!

[Daniel Whitenack]

Thanks Tom! I think it would be great to add a few of these here:

https://github.com/gopherds/resources/tree/master/tooling

where you think it is appropriate.  Would you consider submitting a PR with some additions?

Daniel

[Tom Payne]

Done. I've also added a link to github.com/golang/geo, a library for geometry on the sphere.

[Constantine Vassilev]

How to use go-geom to convert WKBHEX to KML?

Are there a simple example?

[Tom Payne]

Here's an example:

----8<----

package main

import (

"log"

"os"

enckml "github.com/twpayne/go-geom/encoding/kml"

"github.com/twpayne/go-geom/encoding/wkbhex"

"github.com/twpayne/go-kml"

)

func main() {

g, err := wkbhex.Decode("000000000140000000000000004010000000000000")

if err != nil {

log.Fatal(err)

}

e, err := enckml.Encode(g)

if err != nil {

log.Fatal(err)

}

if err := kml.KML(kml.Placemark(e)).Write(os.Stdout); err != nil {

log.Fatal(err)

}

// Output:

// <?xml version="1.0" encoding="UTF-8"?>

// <kml xmlns="http://www.opengis.net/kml/2.2"><Placemark><Point><coordinates>2,4</coordinates></Point></Placemark></kml>

}

----8<----

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[Constantine Vassilev]

Hi Tom,

It worked perfectly. Thank you!

--Constantine

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[Michael Jones]

Hard to do better than KML. :-)

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