tiles2image.groovy

import geoscript.layer.*
import geoscript.geom.Bounds
import geoscript.proj.Projection

import javax.imageio.ImageIO

Projection proj = new Projection("EPSG:4326")
Bounds bounds = new Bounds(-180,-90,180,90, proj)
List imageSize = [1600, 800]

[
    // OSM
    new OSM(),
    // Stamen Toner
    new OSM("Stamen Toner", [
        "http://a.tile.stamen.com/toner",
        "http://b.tile.stamen.com/toner",
        "http://c.tile.stamen.com/toner",
        "http://d.tile.stamen.com/toner"
    ]),
    // Stamen Toner-lite
    new OSM("Stamen Toner Lite", [
            "http://a.tile.stamen.com/toner-lite",
            "http://b.tile.stamen.com/toner-lite",
            "http://c.tile.stamen.com/toner-lite",
            "http://d.tile.stamen.com/toner-lite"
    ]),
    // Stamen Watercolor
    new OSM("Stamen Watercolor", [
            "http://a.tile.stamen.com/watercolor",
            "http://b.tile.stamen.com/watercolor",
            "http://c.tile.stamen.com/watercolor",
            "http://d.tile.stamen.com/watercolor"
    ]),
    // Open MapQuest Street Map
    new OSM("MapQuest Street Map",[
            "http://otile1.mqcdn.com/tiles/1.0.0/map",
            "http://otile2.mqcdn.com/tiles/1.0.0/map",
            "http://otile3.mqcdn.com/tiles/1.0.0/map",
            "http://otile4.mqcdn.com/tiles/1.0.0/map"
    ]),
    // Open MapQuest Satellite Map
    new OSM("MapQuest Satellite Map", [
            "http://otile1.mqcdn.com/tiles/1.0.0/sat",
            "http://otile2.mqcdn.com/tiles/1.0.0/sat",
            "http://otile3.mqcdn.com/tiles/1.0.0/sat",
            "http://otile4.mqcdn.com/tiles/1.0.0/sat"
    ])
].each { ImageTileLayer tileLayer ->
    Raster raster = tileLayer.getRaster(tileLayer.tiles(3)).reproject(proj).resample(bbox: bounds, size: imageSize)
    ImageIO.write(raster.image, "png", new File("${tileLayer.name}.png"))
}