public GISFeature SelectPolygonByVertex(GISVertex vertex)
{
for (int i = 0; i < Features.Count; i++)
{
if (Features[i].spatialpart.extent.WithInDistance(vertex, 0) == false)
{
continue;
}
GISPolygon polygon = (GISPolygon)(Features[i].spatialpart);
if (polygon.Include(vertex))
{
return(Features[i]);
}
}
return(null);
}
static void WriteFeatures(GISLayer layer, BinaryWriter bw)
{
for (int featureindex = 0; featureindex < layer.Features.Count; featureindex++)
{
GISFeature feature = layer.Features[featureindex];
if (layer.ShapeType == SHAPETYPE.POINT)
{
WriteVertex(((GISPoint)feature.spatialpart).Location, bw);
}
else if (layer.ShapeType == SHAPETYPE.LINE)
{
GISLine line = (GISLine)(feature.spatialpart);
bw.Write(line.Vertexes.Count);
for (int vc = 0; vc < line.Vertexes.Count; vc++)
{
WriteVertex(line.Vertexes[vc], bw);
}
}
else if (layer.ShapeType == SHAPETYPE.POLYGON)
{
GISPolygon polygon = (GISPolygon)(feature.spatialpart);
bw.Write(polygon.Vertexes.Count);
for (int vc = 0; vc < polygon.Vertexes.Count; vc++)
{
WriteVertex(polygon.Vertexes[vc], bw);
}
}
for (int fieldindex = 0; fieldindex < layer.Fields.Count; fieldindex++)
{
GISField field = layer.Fields[fieldindex];
int tint = TypeToInt(field.datatype);
if (tint == 1)
{
bw.Write((int)(feature.getAttributeValue(fieldindex)));
}
else if (tint == 2)
{
bw.Write(Convert.ToDouble(feature.getAttributeValue(fieldindex)));
}
else if (tint == 3)
{
WriteString(feature.getAttributeValue(fieldindex).ToString(), bw);
}
}
}
}
