go-mapnik

go-mapnik

Go bindings for mapnik (http://www.mapnik.org or http://github.com/mapnik/mapnik)

These bindings rely on http://github.com/springmeyer/mapnik-c-api.

Installation

Linux / MacOS

1. Install Mapnik build environmnent,

   • e.g. Ubuntu: apt-get install libmapnik-dev

2. Download the sources, either by

   • git clone the repository to $GOPATH/src/fawick/go-mapnik

   OR

   • go get -d github.com/fawick/go-mapnik/mapnik

3. cd mapnik and run the configuration script ./configure.bash. That script will setup the correct paths for including Mapnik headers and linking against the Mapnik shared library, as well as download the Mapnik C API source and go install the bindings.

Windows

On Windows, go-mapnik is restricted to GOARCH=386 for the moment, as the SDK is build with MSVC 32-bit and the C api must be build with a compatible compiler as a DLL before the Go bindings can be linked against it. This way

You also need to have the MSVC 10 compiler installed on your system.

So, make sure go version reports windows/386 as your toolchain. If you happen to have the windows/amd64 toolchain, either download Go binaries for windows/386 or put a MinGW 32-bit compiler in your path and rebuild the Go binaries on your own.

1. Install Mapnik Windows 32bit SDK from http://www.mapnik.org/download

2. Download the sources, either by

   • git clone the repository to $GOPATH/src/fawick/go-mapnik

   OR

   • go get -d github.com/fawick/go-mapnik/mapnik

3. Run configure.cmd in the folder mapnik to compile a C DLL that can be used by Go/CGO/GCC later (sources will be downloaded automatically). Also, the script will go install the bindings.

4. Run go run demo.go and open view_tileserver.html in a browser. (Make sure your %PATH% environment variable contains the paths of both mapnik.dll and the newly created mapnik_c_api.dll.)

Usage

See demo.go for some usage examples.