Exemplo n.º 1
0
        /// <summary>
        /// Read a shapefile record.
        /// </summary>
        /// <param name="stream">Input stream.</param>
        public ShapeFileRecord ReadShapeFileRecord(Stream stream)
        {
            ShapeFileRecord record = new ShapeFileRecord();

            // Record Header.
            record.RecordNumber  = ShapeFile.ReadInt32_BE(stream);
            record.ContentLength = ShapeFile.ReadInt32_BE(stream);

            // Shape Type.
            record.ShapeType = ShapeFile.ReadInt32_LE(stream);

            // Read the shape geometry, depending on its type.
            switch (record.ShapeType)
            {
            case (int)ShapeType.NullShape:
                // Do nothing.
                break;

            case (int)ShapeType.Point:
                ShapeFile.ReadPoint(stream, record);
                break;

            case (int)ShapeType.PolyLine:
                // PolyLine has exact same structure as Polygon in shapefile.
                ShapeFile.ReadPolygon(stream, record);
                break;

            case (int)ShapeType.Polygon:
                ShapeFile.ReadPolygon(stream, record);
                break;

            case (int)ShapeType.Multipoint:
                ShapeFile.ReadMultipoint(stream, record);
                break;

            default:
            {
                string msg = String.Format(System.Globalization.CultureInfo.InvariantCulture, "ShapeType {0} is not supported.", (int)record.ShapeType);
                throw new FileFormatException(msg);
            }
            }

            // Add the record to our internal list.
            this.records.Add(record);

            return(record);
        }
Exemplo n.º 2
0
        /// <summary>
        /// Read a shapefile MultiPoint record.
        /// </summary>
        /// <param name="stream">Input stream.</param>
        /// <param name="record">Shapefile record to be updated.</param>
        private static void ReadMultipoint(Stream stream, ShapeFileRecord record)
        {
            // Bounding Box.
            record.XMin = ShapeFile.ReadDouble64_LE(stream);
            record.YMin = ShapeFile.ReadDouble64_LE(stream);
            record.XMax = ShapeFile.ReadDouble64_LE(stream);
            record.YMax = ShapeFile.ReadDouble64_LE(stream);

            // Num Points.
            int numPoints = ShapeFile.ReadInt32_LE(stream);

            // Points.
            for (int i = 0; i < numPoints; i++)
            {
                Point p = new Point();
                p.X = ShapeFile.ReadDouble64_LE(stream);
                p.Y = ShapeFile.ReadDouble64_LE(stream);
                record.Points.Add(p);
            }
        }