public ImportController(IConfiguration config, gisContext context)
{
_context = context;
_temp_storage_path = config.GetValue <string>("TempStoragePath");
Gdal.AllRegister();
Ogr.RegisterAll();
}
public StylesController(gisContext context)
{
_context = context;
}
public ImageController(IConfiguration config, gisContext context)
{
_config = config;
_context = context;
_image_storage_path = _config.GetValue <string>("ImageStoragePath");
}
public GeoJSONController(gisContext context)
{
_context = context;
}
public BasemapsController(gisContext context)
{
_context = context;
}
protected int Import(string drivername, string filepathname)
{
int ret = -1;
// read file and build object
var driver = Ogr.GetDriverByName(drivername);
var datasource = driver.Open(filepathname, 0);
var layer_index = datasource.GetLayerCount();
// for each layer in file/datasource...
while (layer_index-- > 0)
{
var layer = datasource.GetLayerByIndex(layer_index);
GeojsonLayer geojson_layer = new GeojsonLayer();
geojson_layer.Crs = "{ \"type\": \"name\", \"properties\": { \"name\": \"urn: ogc: def: crs: OGC: 1.3:CRS84\" } }";
geojson_layer.Type = "FeatureCollection";
geojson_layer.Name = layer.GetName();
geojson_layer.Description = layer.GetName();
// for each feature in layer...
var feature_def = layer.GetLayerDefn();
var feature = layer.GetNextFeature();
while (feature != null)
{
GeojsonFeature geojson_feature = new GeojsonFeature();
// set Type to default
geojson_feature.Type = "Feature";
// get OSGeo.OGR.Geometry object form datasource and convert to WKT
// convert WKT string to NetTopologySuite.Geometries.Geometry
// and use that to set the Geom property of the object
var geom = feature.GetGeometryRef();
string wkt = null;
geom.ExportToIsoWkt(out wkt);
WKTReader wktReader = new WKTReader();
geojson_feature.Geom = wktReader.Read(wkt);
// build properties json string and use it to set Properties field
int next_field_index = feature.GetFieldCount();
string properties_json = "{";
// for each field in properties list
while (next_field_index-- > 0)
{
var field_defn = feature_def.GetFieldDefn(next_field_index);
var field_name = field_defn.GetName();
var field_type = field_defn.GetFieldType();
var field_type_name = field_defn.GetFieldTypeName(field_type);
if (field_type == FieldType.OFTInteger)
{
int field_val = feature.GetFieldAsInteger(field_name);
properties_json += "\"" + field_name + "\":\"" + field_val + "\" ";
}
if (field_type == FieldType.OFTInteger64)
{
long field_val = feature.GetFieldAsInteger64(field_name);
properties_json += "\"" + field_name + "\":\"" + field_val + "\" ";
}
else if (field_type == FieldType.OFTReal)
{
double field_val = feature.GetFieldAsDouble(field_name);
properties_json += "\"" + field_name + "\":\"" + field_val + "\" ";
}
else if (field_type == FieldType.OFTString)
{
string field_val = feature.GetFieldAsString(field_name);
properties_json += "\"" + field_name + "\":\"" + field_val + "\" ";
}
else
{
throw new Exception("Unknown FieldType " + field_type_name);
}
Console.WriteLine(" " + field_name + "->" + field_type_name);
} // end while next_field_index
properties_json += "}";
geojson_feature.Properties = properties_json;
// add geojson_feature to geojson_layer
geojson_layer.GeojsonFeature.Add(geojson_feature);
// get next feature in layer
feature = layer.GetNextFeature();
} // end while feature
// put layer in database
using (gisContext dbContext = new gisContext())
{
dbContext.GeojsonLayer.Add(geojson_layer);
dbContext.SaveChanges();
ret = geojson_layer.Id;
}
// standard allows for more than one layer, be we are only going to process one for now
break;
} // end while layer loop
datasource.Dispose(); // perhaps put on using statement
driver.Dispose();
return(ret);
}
public UserService(IOptions <AppSettings> appSettings, gisContext context)
{
_appSettings = appSettings.Value;
_context = context;
}
public LayersController(gisContext context)
{
_context = context;
}
public MapsController(gisContext context)
{
_context = context;
}
