public IEnumerable <IFeature> GetFeatures(FetchInfo fetchInfo)
{
var features = new List <RasterFeature>();
if (TryGetMap(fetchInfo.ToViewport(), out var raster))
{
features.Add(new RasterFeature(raster));
}
return(features);
}
public async Task <IEnumerable <IFeature> > GetFeaturesAsync(FetchInfo fetchInfo)
{
var(success, raster) = await TryGetMapAsync(fetchInfo.ToViewport());
if (success)
{
return new[] { new RasterFeature(raster) }
}
;
return(Enumerable.Empty <IFeature>());
}