What's the best method for draping a single WGS84 texture over the globe?

[robhawkes]

Hello,

I'm hoping to use iTowns again for another project of mine, but I'm stuck working out the best method for draping a single texture over the entire globe (eg. a single WGS84 image that covers the extent -180, 180, -90, 90).

For example (though this isn't actually the full extend as it's a cropped screenshot):

It seems there isn't a layer for this in the docs, and I've had limited success forcefully updating the material set on the globe geometry, which seems like more of a hack anyway so I'd like to avoid that.

Is there a layer that I'm missing that could do this, or will I need to dig into the guts of the framework to add my own sphere geometry over the top of the terrain?

Thanks!

[gchoqueux]

in the case of a WGS84 projection in globeView, there's no simple method because tile matrix is divided by 2.
You could divide, on Y axe, your image in 2 images, with name : 'wgs84_0.png and wgs84_1.png.

and use this code

var source_wgs84 = new itowns.TMSSource({
    crs: 'EPSG:4326',
    url: 'wgs84_${x}.png',
    zoom: { min:0, max: 0}
});
var layer_wgs84 = new itowns.ColorLayer('wgs84', {
    source: source_wgs84
});
view.addLayer(layer_wgs84);