public IEnumerable <Way> ReadWays(string fileName, AttributeRegistry attributeRegistry)
{
using (var file = File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (var reader = XmlReader.Create(file))
{
reader.MoveToContent();
reader.ReadStartElement("osm");
bool foundFirstElement = false;
while (reader.IsStartElement())
{
if (reader.Name != "way")
{
reader.Skip();
if (foundFirstElement)
{
yield break;
}
continue;
}
foundFirstElement = true;
var wayId = long.Parse(reader.GetAttribute("id"));
var way = new Way()
{
WayId = wayId
};
reader.ReadStartElement(); // node
reader.Skip();
while (reader.Name == "nd")
{
way.NodeRefs.Add(long.Parse(reader.GetAttribute("ref")));
reader.ReadStartElement();
reader.Skip();
}
var usedTagTypes = new HashSet <int>();
while (reader.Name == "tag")
{
var tagType = attributeRegistry.GetAttributeValueId(OsmAttribute.TagType, reader.GetAttribute("k"));
if (!usedTagTypes.Contains(tagType))
{
way.Tags.Add(new Tag
{
Value = reader.GetAttribute("v"),
Typ = tagType
});
usedTagTypes.Add(tagType);
}
reader.ReadStartElement();
reader.Skip();
}
if (reader.NodeType == XmlNodeType.EndElement)
{
reader.ReadEndElement();
}
yield return(way);
}
}
}
}
public IEnumerable <Relation> ReadRelations(string fileName, AttributeRegistry attributeRegistry)
{
using (var file = File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
using (var reader = XmlReader.Create(file))
{
reader.MoveToContent();
reader.ReadStartElement("osm");
bool foundFirstElement = false;
while (reader.IsStartElement())
{
if (reader.Name != "relation")
{
reader.Skip();
if (foundFirstElement)
{
yield break;
}
continue;
}
foundFirstElement = true;
var relationId = long.Parse(reader.GetAttribute("id"));
var relation = new Relation()
{
RelationId = relationId
};
reader.ReadStartElement(); // node
reader.Skip();
while (reader.Name == "member")
{
relation.Members.Add(
new Relation.Member
{
Type = attributeRegistry.GetAttributeValueId(OsmAttribute.MemberType, reader.GetAttribute("type")),
Ref = long.Parse(reader.GetAttribute("ref")),
Role = attributeRegistry.GetAttributeValueId(OsmAttribute.MemberRole, reader.GetAttribute("role")),
});
reader.ReadStartElement();
reader.Skip();
}
var usedTagTypes = new HashSet <int>();
while (reader.Name == "tag")
{
var tagType = attributeRegistry.GetAttributeValueId(OsmAttribute.TagType, reader.GetAttribute("k"));
if (!usedTagTypes.Contains(tagType))
{
relation.Tags.Add(new Tag
{
Value = reader.GetAttribute("v"),
Typ = tagType
});
usedTagTypes.Add(tagType);
}
reader.ReadStartElement();
reader.Skip();
}
if (reader.NodeType == XmlNodeType.EndElement)
{
reader.ReadEndElement();
}
yield return(relation);
}
}
}
}
private IEnumerable <Node> ProcessNodes(PrimitiveBlock block, PrimitiveGroup group, AttributeRegistry attributeRegistry)
{
if (group.Nodes == null)
{
yield break;
}
foreach (PbfNode node in group.Nodes)
{
double lat = 1E-09 * (block.LatOffset + (block.Granularity * node.Latitude));
double lon = 1E-09 * (block.LonOffset + (block.Granularity * node.Longitude));
List <Tag> tags = null;
if (node.Keys != null)
{
tags = node.Keys.Select((t, i) => new Tag()
{
Typ = attributeRegistry.GetAttributeValueId(OsmAttribute.TagType, block.StringTable[t]),
Value = block.StringTable[node.Values[i]]
}).ToList();
}
yield return(new Node(node.ID, lat, lon, tags ?? new List <Tag>()));
}
}
public IEnumerable <Relation> ReadRelations(string fileName, AttributeRegistry attributeRegistry)
{
using (var file = File.Open(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
{
BlobHeader blobHeader = null;
while ((blobHeader = ReadBlobHeader(file)) != null)
{
var block = ReadBlob(file, blobHeader) as PrimitiveBlock;
if (block != null)
{
foreach (PrimitiveGroup group in block.PrimitiveGroup)
{
if (group.Relations == null)
{
continue;
}
foreach (var relation in group.Relations)
{
var rel = new Relation
{
RelationId = relation.ID
};
long memberRefStore = 0;
for (int i = 0; i < relation.MemberIds.Count; i++)
{
memberRefStore += relation.MemberIds[i];
string role = block.StringTable[relation.RolesIndexes[i]];
rel.Members.Add(
new Relation.Member
{
Type = attributeRegistry.GetAttributeValueId(OsmAttribute.MemberType, relation.Types[i].ToString()),
Ref = memberRefStore,
Role = attributeRegistry.GetAttributeValueId(OsmAttribute.MemberRole, role),
});
}
var usedTagTypes = new HashSet <int>();
if (relation.Keys != null)
{
for (int i = 0; i < relation.Keys.Count; i++)
{
var tagType = attributeRegistry.GetAttributeValueId(OsmAttribute.TagType, block.StringTable[relation.Keys[i]]);
if (!usedTagTypes.Contains(tagType))
{
rel.Tags.Add(new Tag
{
Value = block.StringTable[relation.Values[i]],
Typ = tagType
});
usedTagTypes.Add(tagType);
}
}
}
yield return(rel);
}
}
}
}
}
}
private IEnumerable <Node> ProcessDenseNodes(PrimitiveBlock block, PrimitiveGroup group, AttributeRegistry attributeRegistry)
{
if (group.DenseNodes == null)
{
yield break;
}
long idStore = 0;
long latStore = 0;
long lonStore = 0;
int keyValueIndex = 0;
for (int i = 0; i < group.DenseNodes.Id.Count; i++)
{
idStore += group.DenseNodes.Id[i];
lonStore += group.DenseNodes.Longitude[i];
latStore += group.DenseNodes.Latitude[i];
double lat = 1E-09 * (block.LatOffset + (block.Granularity * latStore));
double lon = 1E-09 * (block.LonOffset + (block.Granularity * lonStore));
var tags = new List <Tag>();
if (group.DenseNodes.KeysVals.Count > 0)
{
while (group.DenseNodes.KeysVals[keyValueIndex] != 0)
{
string key = block.StringTable[group.DenseNodes.KeysVals[keyValueIndex++]];
string value = block.StringTable[group.DenseNodes.KeysVals[keyValueIndex++]];
var tagType = attributeRegistry.GetAttributeValueId(OsmAttribute.TagType, key);
var tag = new Tag()
{
Typ = tagType,
Value = value
};
tags.Add(tag);
}
keyValueIndex++;
}
var node = new Node(idStore, lat, lon, tags);
yield return(node);
}
}
