public static IEnumerable <GeometryData> Load(PolygonFile source)
{
var geomFact = new GeometryFactory();
using var reader = new ShapefileDataReader(source.Filename, geomFact);
CoordinateSystem f = ProjectionUtils.Transforms[source.Srid];
CoordinateSystem t = ProjectionUtils.EPSG_4326();
var transformer = ProjectionUtils.GetTransformer(f, t);
while (reader.Read())
{
var name = reader.GetString(source.Name);
string reference = null;
if (source.Reference != null)
{
reference = reader.GetString((int)source.Reference);
}
if (reference == null)
{
reference = Guid.NewGuid().ToString();
}
var geom = ProjectionUtils.Transform(reader.Geometry, transformer);
var data = new GeometryData {
Name = name, DataType = source.DataType, Reference = reference, Geom = geom
};
yield return(data);
}
}
IEnumerable <GeometryData> ProcessSourceFile(PolygonFile sourcefile)
{
switch (sourcefile.Processor)
{
case "shapefile":
{
var items = ShapefileLoader.Load(sourcefile).ToList();
_logger.LogInformation($"Loaded {items.Count} from {sourcefile.Title}");
return(items);
}
}
return(null);
}
