/// <summary>
/// Writes the tile to the given stream.
/// </summary>
/// <param name="vectorTile">The vector tile.</param>
/// <param name="stream">The stream to write to.</param>
/// <param name="extent">The extent.</param>
public static void Write(this VectorTile vectorTile, Stream stream, uint extent = 4096)
{
var tile = new Tiles.Tile(vectorTile.TileId);
double latitudeStep = (tile.Top - tile.Bottom) / extent;
double longitudeStep = (tile.Right - tile.Left) / extent;
double top = tile.Top;
double left = tile.Left;
var mapboxTile = new Mapbox.Tile();
foreach (var localLayer in vectorTile.Layers)
{
var layer = new Mapbox.Tile.Layer {
Version = 2, Name = localLayer.Name, Extent = extent
};
var keys = new Dictionary <string, uint>();
var values = new Dictionary <string, uint>();
foreach (var localLayerFeature in localLayer.Features)
{
if (localLayerFeature.Geometry is Point p)
{
var feature = new Mapbox.Tile.Feature();
var posX = (int)((p.X - left) / longitudeStep);
var posY = (int)((top - p.Y) / latitudeStep);
GenerateMoveTo(feature.Geometry, posX, posY);
feature.Type = Tile.GeomType.Point;
AddAttributes(feature.Tags, keys, values, localLayerFeature.Attributes);
layer.Features.Add(feature);
}
else if (localLayerFeature.Geometry is LineString ls)
{
var feature = new Mapbox.Tile.Feature();
var posX = (int)((ls.Coordinates[0].X - left) / longitudeStep);
var posY = (int)((top - ls.Coordinates[0].Y) / latitudeStep);
GenerateMoveTo(feature.Geometry, posX, posY);
// generate line to.
feature.Geometry.Add(GenerateCommandInteger(2, ls.Coordinates.Length - 1));
for (var j = 1; j < ls.Coordinates.Length; j++)
{
var localPosX = (int)((ls.Coordinates[j].X - left) / longitudeStep);
var localPosY = (int)((top - ls.Coordinates[j].Y) / latitudeStep);
var dx = localPosX - posX;
var dy = localPosY - posY;
posX = localPosX;
posY = localPosY;
feature.Geometry.Add(GenerateParameterInteger(dx));
feature.Geometry.Add(GenerateParameterInteger(dy));
}
feature.Type = Tile.GeomType.LineString;
AddAttributes(feature.Tags, keys, values, localLayerFeature.Attributes);
layer.Features.Add(feature);
}
}
layer.Keys.AddRange(keys.Keys);
foreach (var value in values.Keys)
{
if (int.TryParse(value, out var intValue))
{
layer.Values.Add(new Tile.Value()
{
IntValue = intValue
});
}
else if (float.TryParse(value, out var floatValue))
{
layer.Values.Add(new Tile.Value()
{
FloatValue = floatValue
});
}
else
{
layer.Values.Add(new Tile.Value()
{
StringValue = value
});
}
}
mapboxTile.Layers.Add(layer);
}
ProtoBuf.Serializer.Serialize <Tile>(stream, mapboxTile);
}
/// <summary>
/// Writes the tile to the given stream.
/// </summary>
public static void Write(this VectorTile vectorTile, Stream stream,
Func <IAttributeCollection, Itinero.VectorTiles.Layers.Layer, IAttributeCollection> mapAttributes = null, uint extent = 4096)
{
var tile = new Tiles.Tile(vectorTile.TileId);
double latitudeStep = (tile.Top - tile.Bottom) / extent;
double longitudeStep = (tile.Right - tile.Left) / extent;
double top = tile.Top;
double left = tile.Left;
var mapboxTile = new Mapbox.Tile();
foreach (var localLayer in vectorTile.Layers)
{
var layer = new Mapbox.Tile.Layer();
layer.Version = 2;
layer.Name = localLayer.Name;
layer.Extent = extent;
var keys = new Dictionary <string, uint>();
var values = new Dictionary <string, uint>();
if (localLayer is SegmentLayer)
{
var segmentLayer = localLayer as SegmentLayer;
var segments = segmentLayer.Segments;
var edgeProfile = segmentLayer.Profiles;
var edgeMeta = segmentLayer.Meta;
for (var i = 0; i < segments.Length; i++)
{
var feature = new Mapbox.Tile.Feature();
var shape = segments[i].Shape;
var posX = (int)((shape[0].Longitude - left) / longitudeStep);
var posY = (int)((top - shape[0].Latitude) / latitudeStep);
GenerateMoveTo(feature.Geometry, posX, posY);
// generate line to.
feature.Geometry.Add(GenerateCommandInteger(2, shape.Length - 1));
for (var j = 1; j < shape.Length; j++)
{
var localPosX = (int)((shape[j].Longitude - left) / longitudeStep);
var localPosY = (int)((top - shape[j].Latitude) / latitudeStep);
var dx = localPosX - posX;
var dy = localPosY - posY;
posX = localPosX;
posY = localPosY;
feature.Geometry.Add(GenerateParameterInteger(dx));
feature.Geometry.Add(GenerateParameterInteger(dy));
}
feature.Type = Tile.GeomType.LineString;
if (mapAttributes != null)
{
IAttributeCollection attributes = new AttributeCollection(edgeProfile.Get(segments[i].Profile));
var meta = edgeMeta.Get(segments[i].Meta);
foreach (var a in meta)
{
attributes.AddOrReplace(a);
}
attributes = mapAttributes(attributes, localLayer);
foreach (var attribute in attributes)
{
uint keyId;
if (!keys.TryGetValue(attribute.Key, out keyId))
{
keyId = (uint)keys.Count;
keys.Add(attribute.Key, keyId);
}
uint valueId;
if (!values.TryGetValue(attribute.Value, out valueId))
{
valueId = (uint)values.Count;
values.Add(attribute.Value, valueId);
}
feature.Tags.Add(keyId);
feature.Tags.Add(valueId);
}
}
else
{
var profile = edgeProfile.Get(segments[i].Profile);
if (profile != null)
{
foreach (var attribute in profile)
{
uint keyId;
if (!keys.TryGetValue(attribute.Key, out keyId))
{
keyId = (uint)keys.Count;
keys.Add(attribute.Key, keyId);
}
uint valueId;
if (!values.TryGetValue(attribute.Value, out valueId))
{
valueId = (uint)values.Count;
values.Add(attribute.Value, valueId);
}
feature.Tags.Add(keyId);
feature.Tags.Add(valueId);
}
}
var meta = edgeMeta.Get(segments[i].Meta);
if (meta != null)
{
foreach (var attribute in meta)
{
uint keyId;
if (!keys.TryGetValue(attribute.Key, out keyId))
{
keyId = (uint)keys.Count;
keys.Add(attribute.Key, keyId);
}
uint valueId;
if (!values.TryGetValue(attribute.Value, out valueId))
{
valueId = (uint)values.Count;
values.Add(attribute.Value, valueId);
}
feature.Tags.Add(keyId);
feature.Tags.Add(valueId);
}
}
}
layer.Features.Add(feature);
}
}
else if (localLayer is StopLayer)
{
var pointLayer = localLayer as StopLayer;
var points = pointLayer.Points;
var metaIndex = pointLayer.Meta;
for (var i = 0; i < points.Length; i++)
{
var point = points[i];
var feature = new Mapbox.Tile.Feature();
var posX = (int)((point.Longitude - left) / longitudeStep);
var posY = (int)((top - point.Latitude) / latitudeStep);
GenerateMoveTo(feature.Geometry, posX, posY);
feature.Type = Tile.GeomType.Point;
var attributes = metaIndex.Get(point.MetaId);
if (mapAttributes != null)
{
attributes = mapAttributes(attributes, localLayer);
}
if (attributes != null)
{
foreach (var attribute in attributes)
{
uint keyId;
if (!keys.TryGetValue(attribute.Key, out keyId))
{
keyId = (uint)keys.Count;
keys.Add(attribute.Key, keyId);
}
uint valueId;
if (!values.TryGetValue(attribute.Value, out valueId))
{
valueId = (uint)values.Count;
values.Add(attribute.Value, valueId);
}
feature.Tags.Add(keyId);
feature.Tags.Add(valueId);
}
}
layer.Features.Add(feature);
}
}
else
{ // unknown type of layer.
continue;
}
layer.Keys.AddRange(keys.Keys);
foreach (var value in values.Keys)
{
layer.Values.Add(new Tile.Value()
{
StringValue = value
});
}
mapboxTile.Layers.Add(layer);
}
ProtoBuf.Serializer.Serialize <Tile>(stream, mapboxTile);
}
/// <summary>
/// Writes the tile to the given stream.
/// </summary>
/// <param name="vectorTile">The vector tile.</param>
/// <param name="stream">The stream to write to.</param>
/// <param name="extent">The extent.</param>
/// <param name="idAttributeName">The name of an attribute property to use as the ID for the Feature. Vector tile feature ID's should be integer or ulong numbers.</param>
public static void Write(this VectorTile vectorTile, Stream stream, uint extent = 4096, string idAttributeName = "id")
{
var tile = new Tiles.Tile(vectorTile.TileId);
var tgt = new TileGeometryTransform(tile, extent);
var mapboxTile = new Mapbox.Tile();
foreach (var localLayer in vectorTile.Layers)
{
var layer = new Mapbox.Tile.Layer {
Version = 2, Name = localLayer.Name, Extent = extent
};
var keys = new Dictionary <string, uint>();
var values = new Dictionary <Tile.Value, uint>();
foreach (var localLayerFeature in localLayer.Features)
{
var feature = new Mapbox.Tile.Feature();
// Encode geometry
switch (localLayerFeature.Geometry)
{
case IPuntal puntal:
feature.Type = Tile.GeomType.Point;
feature.Geometry.AddRange(Encode(puntal, tgt));
break;
case ILineal lineal:
feature.Type = Tile.GeomType.LineString;
feature.Geometry.AddRange(Encode(lineal, tgt));
break;
case IPolygonal polygonal:
feature.Type = Tile.GeomType.Polygon;
feature.Geometry.AddRange(Encode(polygonal, tgt, tile.Zoom));
break;
default:
feature.Type = Tile.GeomType.Unknown;
break;
}
// If geometry collapsed during encoding, we don't add the feature at all
if (feature.Geometry.Count == 0)
{
continue;
}
// Translate attributes for feature
AddAttributes(feature.Tags, keys, values, localLayerFeature.Attributes);
//Try and retrieve an ID from the attributes.
var id = localLayerFeature.Attributes.GetOptionalValue(idAttributeName);
//Converting ID to string, then trying to parse. This will handle situations will ignore situations where the ID value is not actually an integer or ulong number.
if (id != null && ulong.TryParse(id.ToString(), out ulong idVal))
{
feature.Id = idVal;
}
// Add feature to layer
layer.Features.Add(feature);
}
layer.Keys.AddRange(keys.Keys);
layer.Values.AddRange(values.Keys);
mapboxTile.Layers.Add(layer);
}
ProtoBuf.Serializer.Serialize <Tile>(stream, mapboxTile);
}
