protected TileSchema()
{
this.IsYAxisReversed = false;
this.zoomLevels = new Collection <ZoomLevel>();
this.minZoomLevel = new ZoomLevel(0);
this.maxZoomLevel = new ZoomLevel(); // take the max resolution
}
protected Layer(string id)
{
this.minZoomLevel = new ZoomLevel(0);
this.MaxZoomLevel = new ZoomLevel(); // take the max resolution
this.id = id;
this.Opacity = 1;
}
public ZoomLevel GetNearestZoomLevel(double resolution)
{
InternalChecker.CheckArrayIsEmptyOrNull(zoomLevels, "ZoomLevels");
var orderedZoomLevels = zoomLevels.OrderByDescending(z => z.Resolution);
// smaller than smallest
if (orderedZoomLevels.Last().Resolution > resolution)
{
return(orderedZoomLevels.Last());
}
// bigger than biggest
if (orderedZoomLevels.First().Resolution < resolution)
{
return(orderedZoomLevels.First());
}
ZoomLevel result = null;
double resultDistance = double.MaxValue;
foreach (var current in orderedZoomLevels)
{
double distance = Math.Abs(current.Resolution - resolution);
if (distance < resultDistance)
{
result = current;
resultDistance = distance;
}
}
return(result);
}
public TileInfo(int column, int row, double resolution, TileSchema tileSchema)
{
Width = 256;
Height = 256;
ZoomLevel = new ZoomLevel(resolution);
BoundingBox = GetBoundingBoxByColumnRow(column, row);
}
public SphericalMercatorTileSchema()
{
Crs = "EPSG:3857";
IsYAxisReversed = true;
MaxExtent = new BoundingBox(-20037508.342789, -20037508.342789, 20037508.342789, 20037508.342789);
MinZoomLevel = new ZoomLevel(0);
MaxZoomLevel = new ZoomLevel(); // take the max resolution
}
public TileInfo(int column, int row, double resolution, TileSchema tileSchema)
{
this.tileX = -1;
this.tileY = -1;
this.width = 256;
this.height = 256;
this.zoomLevel = new ZoomLevel(resolution);
this.Extent = GetBoundingBoxByColumnRow(column, row);
}
protected override Collection <ZoomLevel> GetZoomLevelsCore()
{
Collection <ZoomLevel> zoomlevels = new Collection <ZoomLevel>();
for (int i = 0; i < NumberOfZoomLevels; i++)
{
var resolution = 2 * ScaleFactor / (1 << i);
var zoomLevel = new ZoomLevel(resolution, (i + 1).ToString(CultureInfo.InvariantCulture));
zoomlevels.Add(zoomLevel);
}
return(zoomlevels);
}
private static Collection <ZoomLevel> GetZoomLevels(int numberOfZoomLevels)
{
Collection <ZoomLevel> zoomlevels = new Collection <ZoomLevel>();
for (int i = 0; i < numberOfZoomLevels; i++)
{
var resolution = 2 * ScaleFactor / (1 << i);
var zoomLevel = new ZoomLevel(resolution, (i + 1).ToString(CultureInfo.InvariantCulture));
zoomlevels.Add(zoomLevel);
}
return(zoomlevels);
}
private void InitializeZoomLevels()
{
ZoomLevels.Clear();
double resolution = MaxResolution;
for (int i = 0; i < numberOfZoomLevels; i++)
{
var ZoomLevel = new ZoomLevel(resolution, (i + 1).ToString(CultureInfo.InvariantCulture));
ZoomLevels.Add(ZoomLevel);
resolution /= 2;
}
}
protected virtual Collection <ZoomLevel> GetZoomLevelsCore()
{
zoomLevels.Clear();
double resolution = MaxZoomLevel.Resolution;
for (int i = 0; i < numberOfZoomLevels; i++)
{
var zoomLevel = new ZoomLevel(resolution, (i + 1).ToString(CultureInfo.InvariantCulture));
zoomLevels.Add(zoomLevel);
resolution /= 2;
}
return(zoomLevels);
}
public void Remove(int tileX, int tileY, ZoomLevel zoomLevel)
{
Remove(tileX, tileY, zoomLevel.Id);
}
public T Read(int tileX, int tileY, ZoomLevel zoomLevel)
{
return(Read(tileX, tileY, zoomLevel.Id));
}
public void Remove(int column, int row, ZoomLevel zoomLevel)
{
Remove(column, row, zoomLevel.Id);
}
public T Get(int column, int row, ZoomLevel zoomLevel)
{
return(Get(column, row, zoomLevel.Id));
}
