private static string AddFeatures(IReadOnlyList <Feature> features, int fromIndex, int toIndex)
{
StringWriter stringWriter = new StringWriter();
using (GeoJsonWriter writer = new GeoJsonWriter(stringWriter))
{
writer.WriteFeatures(features, fromIndex, toIndex);
stringWriter.Flush();
return(stringWriter.ToString());
}
}
public static string GridToGeoJson(Grid grid, bool addGridLayer)
{
int featureCollectionEpsg = -1;
// Assuming that all grid cells have the same projection.
if (grid.Cells.Count > 0)
{
featureCollectionEpsg = grid.Cells[0].Geometry.STSrid.Value;
}
Dictionary <string, object> properties = null;
var features = new List <Feature>();
foreach (var cell in grid.Cells)
{
if (addGridLayer)
{
properties = new Dictionary <string, object> {
{ "value", cell.Value }
};
}
var feature = CreateFeature(cell.Geometry, properties, cell.CellId, featureCollectionEpsg);
features.Add(feature);
}
var featureCollection = new GeoJSON.Net.Feature.FeatureCollection(features);
if (featureCollectionEpsg != -1)
{
featureCollection.CRS = new NamedCRS("EPSG:" + featureCollectionEpsg);
}
return(GeoJsonWriter.ToGeoJson(featureCollection));
}