Initial commit.

Author: zerebubuth

.gitignore

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+*~

COPYING

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+Copyright (c) 2015 Matt Amos <[email protected]>
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the
+   distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

README.md

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+# Go Vector Map Tile Server
+
+A tile server using [vecamole](https://github.com/zerebubuth/vecamole) and [Mapnik](http://mapnik.org) to render vector tiles from a Mapnik data source and configuration.
+
+## Installation
+
+First, install [vecamole](https://github.com/zerebubuth/vecamole). That's the only hard bit. From then, it should be as simple as:
+
+```
+go install github.com/zerebubuth/go-vector-map-tile-server
+```
+
+## Running it
+
+Currently it just dumps a static `tile.pbf` in the current directory. Working in progress to make it more useful.

main.go

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+package main
+
+import (
+	"bytes"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"github.com/zerebubuth/govecamole"
+)
+
+var outputFile = flag.String("outputFile", "tile.pbf", "The file name to write the output to.")
+
+func main() {
+	flag.Parse()
+
+	err := govecamole.RegisterDefaultDatasources()
+	if err != nil {
+		fmt.Printf("Ooops, can't register datasources: %s\n", err.Error())
+		return
+	}
+
+	m, err := govecamole.New(256, 256)
+	if err != nil {
+		fmt.Printf("Ooops, got an error: %s\n", err.Error())
+		return
+	}
+	defer m.Close()
+
+	sampleconf := `<!DOCTYPE Map>
+<Map srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">
+  <Style name="point">
+  </Style>
+  <Layer name="point" srs="+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs">
+    <StyleName>point</StyleName>
+    <Datasource>
+    <Parameter name="type">csv</Parameter>
+    <Parameter name="inline">
+type,WKT
+point,"POINT (0 0)"
+</Parameter>
+    </Datasource>
+  </Layer>
+</Map>`
+
+	err = m.LoadString(sampleconf, true, "sampleconf")
+	if err != nil {
+		fmt.Printf("Unable to load sample config string into map: %s\n", err.Error())
+		return
+	}
+
+	req, err := govecamole.NewRequestZXY(256, 256, 0, 0, 0)
+	if err != nil {
+		fmt.Printf("Unable to create a request: %s\n", err.Error())
+		return
+	}
+	defer req.Close()
+
+	opts, err := govecamole.DefaultOptions()
+	if err != nil {
+		fmt.Printf("Unable to create default options: %s\n", err.Error())
+		return
+	}
+	defer opts.Close()
+
+	var buf bytes.Buffer
+	err = govecamole.Render(&buf, m, req, opts)
+	if err != nil {
+		fmt.Printf("Unable render tile: %s\n", err.Error())
+		return
+	}
+
+	fmt.Printf("Got tile size=%v\n", buf.Len())
+
+	file, err := os.Create(*outputFile)
+	if err != nil {
+		fmt.Printf("Unable to create output file %v: %s\n", *outputFile, err.Error())
+		return
+	}
+	defer file.Close()
+
+	_, err = io.Copy(file, &buf)
+	if err != nil {
+		fmt.Printf("Unable to copy tile to file: %s\n", err.Error())
+		return
+	}
+}