/// <summary>
/// Gets the name of the shape and all its tags.
/// </summary>
private MetaData extractMetaData(element el)
{
MetaData md = new MetaData();
foreach (tag t in el.tagCollection)
{
if (t.k == "name")
{
md.Name = t.v;
}
else
{
md.Tags.Add(t.k, t.v);
}
}
return md;
}
public string SaveToShapefile(ConversionOptions options)
{
ShapeLib.ShapeType shapetype;
double[] x, y;
IntPtr hShpPoly = IntPtr.Zero, hShpLine = IntPtr.Zero, hShpPoint = IntPtr.Zero;
linesData = new List<MetaData>();
polygonsData = new List<MetaData>();
pointsData = new List<MetaData>();
if (options.Lines)
{
// create a new PolyLines shapefile
hShpLine = ShapeLib.SHPCreate(options.Filename + "-lines", ShapeLib.ShapeType.PolyLine);
if (hShpLine.Equals(IntPtr.Zero))
return "Cannot create lines file!";
}
if (options.Polygons)
{
// create a new Polygons shapefile
hShpPoly = ShapeLib.SHPCreate(options.Filename + "-polygons", ShapeLib.ShapeType.Polygon);
if (hShpPoly.Equals(IntPtr.Zero))
return "Cannot create polygons file!";
}
if (options.Points)
{
// create a new Points shapefile
hShpPoint = ShapeLib.SHPCreate(options.Filename + "-points", ShapeLib.ShapeType.Point);
if (hShpPoint.Equals(IntPtr.Zero))
return "Cannot create points file!";
}
/*iterate through OSM ways*/
foreach (way strada in infile.wayCollection)
{
/*check if the way is closed, set shape type accordingly*/
if (strada.ndCollection[0].reff == strada.ndCollection[strada.ndCollection.Count - 1].reff)
{
shapetype = ShapeLib.ShapeType.Polygon;
}
else
{
shapetype = ShapeLib.ShapeType.PolyLine;
}
x = new double[strada.ndCollection.Count];
y = new double[strada.ndCollection.Count];
/*iterate through all the nodes in the way, set x and y coords*/
int i = 0;
foreach (nd nod in strada.ndCollection)
{
node nodcomplet = infile.nodeCollection.GetByRef(nod.reff);
/*TO DO: Regional settings - to be checked - should be ok now*/
x[i] = double.Parse(nodcomplet.lon, CultureInfo.InvariantCulture);
y[i] = double.Parse(nodcomplet.lat, CultureInfo.InvariantCulture);
nodcomplet.InWay = true;
i++;
}
/*finding way name*/
MetaData elementData = new MetaData();
elementData = extractMetaData(strada);
foreach (tag t in strada.tagCollection)
{
/*just to make sure that all the streets are
*put in the polylines file*/
if ((t.k == "highway") && (shapetype == ShapeLib.ShapeType.Polygon))
{
shapetype = ShapeLib.ShapeType.PolyLine;
areas--;
ways++;
}
/*exception for circular ways: junction:roundabout
* should be marked as polyline, not as polygon*/
if ((t.k == "junction") && (t.v == "roundabout") && (shapetype == ShapeLib.ShapeType.Polygon))
{
shapetype = ShapeLib.ShapeType.PolyLine;
areas--;
ways++;
}
}
/*create object, write it to file and destroy it*/
IntPtr pshpObj = ShapeLib.SHPCreateSimpleObject(shapetype,
strada.ndCollection.Count, x, y, new double[strada.ndCollection.Count]);
int iRet;
if ((shapetype == ShapeLib.ShapeType.PolyLine) && options.Lines)
{
iRet = ShapeLib.SHPWriteObject(hShpLine, -1, pshpObj);
/*add shape meta data to correct list*/
linesData.Add(elementData);
}
else if ((shapetype == ShapeLib.ShapeType.Polygon) && (options.Polygons))
{
iRet = ShapeLib.SHPWriteObject(hShpPoly, -1, pshpObj);
/*add shape meta data to correct list*/
polygonsData.Add(elementData);
}
ShapeLib.SHPDestroyObject(pshpObj);
}
if (options.Points)
{
/*write the nodes that are not part of any way*/
foreach (node nod in infile.nodeCollection)
{
if (!nod.InWay)
{
x = new double[1];
y = new double[1];
/*TO DO: Regional settings - to be checked*/
x[0] = double.Parse(nod.lon, CultureInfo.InvariantCulture);
y[0] = double.Parse(nod.lat, CultureInfo.InvariantCulture);
/*create object, write it to file and destroy it*/
IntPtr pshpObj = ShapeLib.SHPCreateSimpleObject(ShapeLib.ShapeType.Point,
1, x, y, new double[1]);
int iRet = ShapeLib.SHPWriteObject(hShpPoint, -1, pshpObj);
/*finding node meta data*/
MetaData elementData = extractMetaData(nod);
pointsData.Add(elementData);
ShapeLib.SHPDestroyObject(pshpObj);
}
}
}
// free resources and write dbf files
if (options.Polygons)
{
ShapeLib.SHPClose(hShpPoly);
WriteDBF(ShapeLib.ShapeType.Polygon, options.Filename, options.ConvertTags);
writeProjectionFile(options.Filename + "-polygons", options.Projection);
}
if (options.Lines)
{
ShapeLib.SHPClose(hShpLine);
WriteDBF(ShapeLib.ShapeType.PolyLine, options.Filename, options.ConvertTags);
writeProjectionFile(options.Filename + "-lines", options.Projection);
}
if (options.Points)
{
ShapeLib.SHPClose(hShpPoint);
WriteDBF(ShapeLib.ShapeType.Point, options.Filename, options.ConvertTags);
writeProjectionFile(options.Filename + "-points", options.Projection);
}
return "Completed!";
}