public IActionResult Get(string theme, int z, int x, int y)
{
string themeFilename = char.ToUpper(theme[0]) + theme.Substring(1);
CssDocument cssDoc = CssDocument.Load($@"Themes\{themeFilename}Theme.sgcss");
LayerGroup layerGroup = new LayerGroup();
layerGroup.LoadStyledLayers("AppData", cssDoc);
MapModel tempMapModel = new MapModel(GeoUnit.Meter);
tempMapModel.Layers.AddRange(layerGroup.Layers);
return(new XyzTileResult(tempMapModel, x, y, z));
}