private GeoFilledRegion[] ParseWkt(string wkt, Guid resId)
{
var result = new List <GeoFilledRegion>();
wkt = wkt.Trim();
var sr = new StringReader(wkt);
var rootType = ReadHeaderWkt(sr);
if (rootType.Equals("MULTIPOLYGON", StringComparison.OrdinalIgnoreCase))
{
GeoFilledRegion polygon = ReadPolygon(sr, resId);
while (polygon != null)
{
result.Add(polygon);
polygon = ReadPolygon(sr, resId);
}
}
if (rootType.Equals("POLYGON", StringComparison.OrdinalIgnoreCase))
{
GeoFilledRegion polygon = ReadPolygon(sr, resId);
result.Add(polygon);
}
return(result.ToArray());
}
private GeoFilledRegion ReadPolygon(StringReader sr, Guid resId)
{
var sb = new StringBuilder();
int cc = 0;
while (sr.Read() > 0)
{
if ((char)sr.Peek() == '(')
{
cc = 1;
break;
}
if ((char)sr.Peek() == ')')
{
return(null);
}
}
while (cc > 0 && sr.Read() > 0)
{
if ((char)sr.Peek() == '(')
{
cc++;
}
if ((char)sr.Peek() == ')')
{
cc--;
}
sb.Append((char)sr.Peek());
}
GeoFilledRegion gfr = new GeoFilledRegion {
ResId = resId
};
List <IEnumerable <GeoPoint> > holes = new List <IEnumerable <GeoPoint> >();
gfr.HolesList = holes;
var matches = polygonRegex.Matches(sb.ToString());
foreach (Match match in matches)
{
var polyText = match.Groups[0].Value;
var coordsMatches = coorRegex.Matches(polyText);
List <GeoPoint> coords = new List <GeoPoint>();
foreach (Match coord in coordsMatches)
{
coords.Add(new GeoPoint
{
X = double.Parse(coord.Groups[1].Value, CultureInfo.InvariantCulture),
Y = double.Parse(coord.Groups[2].Value, CultureInfo.InvariantCulture)
});
}
if (gfr.OuterLine == null)
{
gfr.OuterLine = coords;
}
else
{
holes.Add(coords);
}
}
return(gfr);
}
