/// <summary>
/// Creates a GeoJson from all ProjectGeometries in the current project (session has to be set)
/// </summary>
/// <returns>GeoJson string</returns>
private string createGeoJson()
{
string projectId = HttpContext.Session.GetString("Project");
if (projectId == null)
{
return("");
}
//TODO chb
//Project myProject = db.Projects.Include(m => m.Geometries).Where(m => m.ProjectId == new Guid(projectId)).FirstOrDefault();
Project myProject = db.Projects
.Include(p => p.ProjectGroups).ThenInclude(m => m.Geometries)
.Where(m => m.ProjectId == new Guid(projectId)).FirstOrDefault();
if (myProject == null)
{
return("");
}
if (myProject != null)
{
NetTopologySuite.Features.FeatureCollection featureCollection = new NetTopologySuite.Features.FeatureCollection();
//TODO chb
//foreach (ReferenceGeometry g in myProject.Geometries.Where(m => m.StatusId != StatusEnum.deleted))
foreach (ReferenceGeometry g in myProject.ProjectGroups.SelectMany(pg => pg.Geometries).Where(g => g.StatusId != StatusEnum.deleted))
{
if (g.Point != null)
{
featureCollection.Add(getFeature(g, GeomType.Point));
}
if (g.Line != null)
{
featureCollection.Add(getFeature(g, GeomType.Line));
}
if (g.Polygon != null)
{
featureCollection.Add(getFeature(g, GeomType.Polygon));
}
}
var jsonSerializer = GeoJsonSerializer.Create();
var sw = new System.IO.StringWriter();
jsonSerializer.Serialize(sw, featureCollection);
return(sw.ToString());
}
else
{
return(null);// "No project found";
}
}
/// <summary>
/// Adds features from on collection to another.
/// </summary>
public static void Add(this NetTopologySuite.Features.FeatureCollection features, NetTopologySuite.Features.FeatureCollection featuresToAdd)
{
foreach (var feature in featuresToAdd.Features)
{
features.Add(feature);
}
}
static void ReadGeometryStream()
{
// let's show you what's going on.
OsmSharp.Logging.Logger.LogAction = (origin, level, message, parameters) =>
{
System.Console.WriteLine(string.Format("[{0}] {1} - {2}", origin, level, message));
};
// Download.ToFile("http://files.itinero.tech/data/OSM/planet/europe/luxembourg-latest.osm.pbf", "luxembourg-latest.osm.pbf").Wait();
using (System.IO.FileStream fileStream = System.IO.File.OpenRead(@"D:\username\Documents\Visual Studio 2017\Projects\OsmTilePrerenderer\OsmTilePrerenderer\Data\monaco-latest.osm.pbf"))
{
// create source stream.
OsmStreamSource source = new PBFOsmStreamSource(fileStream);
// show progress.
OsmStreamSource progress = source.ShowProgress();
// filter all powerlines and keep all nodes.
System.Collections.Generic.IEnumerable <OsmGeo> filtered =
from osmGeo in progress
where osmGeo.Type == OsmSharp.OsmGeoType.Node ||
(osmGeo.Type == OsmSharp.OsmGeoType.Way && osmGeo.Tags != null && osmGeo.Tags.Contains("power", "line"))
select osmGeo;
// convert to a feature stream.
// WARNING: nodes that are partof powerlines will be kept in-memory.
// it's important to filter only the objects you need **before**
// you convert to a feature stream otherwise all objects will
// be kept in-memory.
OsmSharp.Geo.Streams.IFeatureStreamSource features = filtered.ToFeatureSource();
// filter out only linestrings.
System.Collections.Generic.IEnumerable <NetTopologySuite.Features.IFeature> lineStrings = from feature in features
where feature.Geometry is LineString
select feature;
// build feature collection.
NetTopologySuite.Features.FeatureCollection featureCollection = new NetTopologySuite.Features.FeatureCollection();
foreach (NetTopologySuite.Features.IFeature feature in lineStrings)
{
featureCollection.Add(feature);
}
// convert to geojson.
string json = ToJson(featureCollection);
// var st = new Mapsui.Providers.MemoryProvider(json);
System.IO.File.WriteAllText("output.geojson", json);
}
}
/// <summary>
/// Converts the given polygon enumerable to a feature collection.
/// </summary>
public static NetTopologySuite.Features.FeatureCollection ToFeatureCollection(this IEnumerable <LocalGeo.Polygon> polygons)
{
var featureCollection = new NetTopologySuite.Features.FeatureCollection();
foreach (var polygon in polygons)
{
featureCollection.Add(new NetTopologySuite.Features.Feature(
polygon.ToPolygon(), new NetTopologySuite.Features.AttributesTable()));
}
return(featureCollection);
}
/// <summary>
/// Converts the instructions to features.
/// </summary>
public static NetTopologySuite.Features.FeatureCollection ToFeatures(this IEnumerable <Instruction> instructions, Route route)
{
var featureCollection = new NetTopologySuite.Features.FeatureCollection();
foreach (var instruction in instructions)
{
var attributes = new NetTopologySuite.Features.AttributesTable();
attributes.AddAttribute("text", instruction.Text);
attributes.AddAttribute("type", instruction.Type);
var location = route.Shape[instruction.Shape];
featureCollection.Add(new NetTopologySuite.Features.Feature(
new NetTopologySuite.Geometries.Point(location.ToCoordinate()), attributes));
}
return(featureCollection);
}
/// <summary>
/// Converts the given tree to a feature collection.
/// </summary>
public static NetTopologySuite.Features.FeatureCollection ToFeatureCollection(this Algorithms.Networks.Analytics.Trees.Models.Tree tree)
{
var featureCollection = new NetTopologySuite.Features.FeatureCollection();
foreach (var treeEdge in tree.Edges)
{
var attributes = new NetTopologySuite.Features.AttributesTable();
attributes.AddAttribute("weight1", treeEdge.Weight1.ToInvariantString());
attributes.AddAttribute("weight2", treeEdge.Weight2.ToInvariantString());
attributes.AddAttribute("edge", treeEdge.EdgeId.ToInvariantString());
attributes.AddAttribute("previous_edge", treeEdge.PreviousEdgeId.ToInvariantString());
featureCollection.Add(new NetTopologySuite.Features.Feature(
treeEdge.ToLineString(), attributes));
}
return(featureCollection);
}