pixelGeojson.features.forEach((f,i) => {
let coords = f.geometry.coordinates[0][0];
let transCoords = coords.map(c=>{
const imageCoordinate = transform.toImage(transformArgs, c);
return [imageCoordinate[0], -imageCoordinate[1]] })
pixelGeojson.features[i].geometry.coordinates[0][0]=transCoords; });