public async Task<List<CompleteWay>> GetHighways(LatLng northEast, LatLng southWest)
{
var boundsString = string.Join(",", southWest.lat, southWest.lng, northEast.lat, northEast.lng);
var address = $"{OVERPASS_INTERPRETER_ADDRESS}?data=(way[\"highway\"]({boundsString});>;);out;";
using (var client = new HttpClient())
{
var response = await client.GetAsync(address);
var source = new XmlOsmStreamSource(await response.Content.ReadAsStreamAsync());
var completeSource = new OsmSimpleCompleteStreamSource(source);
return completeSource.OfType<CompleteWay>().ToList();
}
}
public Task<List<CompleteWay>> GetAllHighways(string osmFilePath)
{
return Task.Run(() =>
{
using (var stream = _fileSystemHelper.FileOpenRead(osmFilePath))
{
_logger.Info($"Reading {osmFilePath} to memory - extracting only highways.");
var source = new PBFOsmStreamSource(stream);
var completeSource = new OsmSimpleCompleteStreamSource(source);
var higways = completeSource
.OfType<CompleteWay>()
.Where(o => o.Tags.ContainsKey("highway"))
.ToList();
_logger.Info("Finished getting highways. " + higways.Count);
return higways;
}
});
}
public async Task<List<CompleteWay>> GetHighwaysAroundATrace(IEnumerable<Coordinate> coordinates)
{
var overpassQueryPostfix = @"way[highway](bn)-> .w;
node(w.w)-> .n;
(node._.n; way.w);
out qt; ";
var overpassQueryNodes = "";
foreach (var coordinate in coordinates)
{
// lat, lng
overpassQueryNodes += $"(._; node(around: 300, {coordinate.Y}, {coordinate.X}););\n";
}
using (var client = new HttpClient())
{
var response = await client.PostAsync(OVERPASS_INTERPRETER_ADDRESS, new StringContent(overpassQueryNodes + overpassQueryPostfix));
Trace.WriteLine(await response.Content.ReadAsStringAsync());
var source = new XmlOsmStreamSource(await response.Content.ReadAsStreamAsync());
var cache = new OsmDataCacheMemory();
var completeSource = new OsmSimpleCompleteStreamSource(source, cache);
var list = completeSource.OfType<CompleteWay>().ToList();
return list;
}
}