public static void CreateGeohashData(ConsoleOutput console, TimeZoneShapeFileReader inputShapefile, string outputPath)
{
var features = inputShapefile.ReadShapeFile().AsParallel()
.Select(x =>
{
x.Geometry = x.Geometry.Simplify();
return(x);
})
.ToList();
PreLoadTimeZones(features);
console.WriteMessage("Polygons loaded and simplified");
var geohashes = features.AsParallel()
.Select(x => new
{
TimeZone = x,
Geohashes = GeohashTree.GetGeohashes(x.Geometry)
})
.ToList();
console.WriteMessage("Geohashes generated for polygons");
foreach (var hash in geohashes)
{
foreach (var g in hash.Geohashes)
{
AddResult(g, hash.TimeZone);
}
}
console.WriteMessage("Geohash tree built");
WorldBoundsTreeNode.PrepareForOutput();
console.WriteMessage("Geohash tree preparing for output");
WriteGeohashDataFile(outputPath);
console.WriteMessage("Data file written");
WriteLookup(outputPath);
console.WriteMessage("Lookup file written");
}
public static void CreateGeohashData(ConsoleOutput console, TimeZoneShapeFileReader inputShapefile, string outputPath)
{
console.WriteMessage("Loading polygons...");
var features = inputShapefile.ReadShapeFile()
.SelectMany(x =>
{
// Expand MultiPolygons to individual Polygons
var mp = x.Geometry as MultiPolygon;
return(mp != null
? mp.Geometries.Select((y, i) => new TimeZoneFeature {
TzName = x.TzName, Geometry = y, MultiPolyIndex = i
})
: new[] { x });
})
.Where(x => x.Geometry.Area > 0)
.OrderBy(x => x.TzName).ThenBy(x => x.MultiPolyIndex)
.ToList();
PreLoadTimeZones(features);
console.WriteMessage("Polygons loaded.");
var geohashes = features
.AsParallel()
.Select(x =>
{
var indexString = x.MultiPolyIndex >= 0 ? $"[{x.MultiPolyIndex}]" : "";
console.WriteMessage($"Generating geohash for {x.TzName}" + indexString);
return(new
{
TimeZone = x,
Geohashes = GeohashTree.GetGeohashes(x.Geometry)
});
})
.ToList();
console.WriteMessage("Geohashes generated for polygons.");
foreach (var hash in geohashes)
{
foreach (var g in hash.Geohashes)
{
AddResult(g, hash.TimeZone);
}
}
console.WriteMessage("Geohash tree built.");
WorldBoundsTreeNode.PrepareForOutput();
console.WriteMessage("Geohash tree preparing for output.");
WriteGeohashDataFile(outputPath);
console.WriteMessage("Data file written.");
WriteLookup(outputPath);
console.WriteMessage("Lookup file written.");
console.WriteMessage("Done!");
}