private static List <OsmGeoObject> ParseStreets(XElement root)
{
var nodes = (from node in root.Descendants("node")
select new OsmGeoNode()
{
Id = (string)node.Attribute("id"),
Latitude = (double)node.Attribute("lat"),
Longitude = (double)node.Attribute("lon")
}).ToDictionary(x => x.Id, x => x);
var objects = from way in root.Descendants("way")
let fullName = GetTagValue(way, "name")
where fullName != null
let wayNodes = (from nodeRef in way.Elements("nd") select(string) nodeRef.Attribute("ref")).ToList()
select new OsmWay
{
Name = GetOsmName(way),
Nodes = GetGeoNodes(fullName, nodes, wayNodes),
Ua = GetOsmName(way, "uk"),
Ru = GetOsmName(way, "ru"),
ParentDistrict = GetTagValue(way, "addr:suburb")
};
var wayGroups = objects.GroupBy(x => new { x.Name.FullName, x.ParentDistrict });
var distinctGeoObjects = new List <OsmGeoObject>();
foreach (var wayGroup in wayGroups)
{
string SelectMostFrequent(Func <OsmWay, string> selector)
{
return(wayGroup.Select(selector)
.GroupBy(x => x)
.OrderByDescending(x => x.Count())
.First()
.Key);
}
var osmGeoObject = new OsmGeoObject
{
Nodes = wayGroup.SelectMany(x => x.Nodes).ToList(),
Ua = new OsmName()
{
FullOldName = SelectMostFrequent(x => x.Ua.FullOldName),
FullName = SelectMostFrequent(x => x.Ua.FullName)
},
Ru = new OsmName()
{
FullOldName = SelectMostFrequent(x => x.Ru.FullOldName),
FullName = SelectMostFrequent(x => x.Ru.FullName)
},
ParentDistrict = wayGroup.Key.ParentDistrict
};
distinctGeoObjects.Add(osmGeoObject);
}
return(distinctGeoObjects);
}
private static IEnumerable <GeoNode> ConvertGeoNodes(OsmGeoObject osmGeoObject)
{
return(osmGeoObject.Nodes.Select(x => new GeoNode(x.Latitude, x.Longitude)));
}