CreateLayer(Uri,ILayerContainerEdit,Int32,String) Method
Creates a new Layer instance with the specified path to a dataset and adds it to a container such as a map or a group layer. Optionally you can provide a name to override the default display name.
This method must be called on the MCT. Use QueuedTask.Run.
Parameters
- dataUri
- An URI represents the path or url to a dataset or .lyrx or .lpkx file.
- container
- A map or group layer instance where the Layer will be added
- index
- The position of the layer in the map or group layer. 0 represents the top most position.
- layerName
- (optional) When it is not provided, the default display name gets used e.g. the dataset name or alias. (default value = "")
Return Value
Create and add a layer to the active map
/*
* string url = @"c:\data\project.gdb\DEM"; //Raster dataset from a FileGeodatabase
* string url = @"c:\connections\mySDEConnection.sde\roads"; //FeatureClass of a SDE
* string url = @"c:\connections\mySDEConnection.sde\States\roads"; //FeatureClass within a FeatureDataset from a SDE
* string url = @"c:\data\roads.shp"; //Shapefile
* string url = @"c:\data\imagery.tif"; //Image from a folder
* string url = @"c:\data\mySDEConnection.sde\roads"; //.lyrx or .lpkx file
* string url = @"c:\data\CAD\Charlottesville\N1W1.dwg\Polyline"; //FeatureClass in a CAD dwg file
* string url = @"C:\data\CAD\UrbanHouse.rvt\Architectural\Windows"; //Features in a Revit file
* string url = @"http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer"; //map service
* string url = @"http://sampleserver6.arcgisonline.com/arcgis/rest/services/NapervilleShelters/FeatureServer/0"; //FeatureLayer off a map service or feature service
*/
string url = @"c:\data\project.gdb\roads"; //FeatureClass of a FileGeodatabase
Uri uri = new Uri(url);
await QueuedTask.Run(() => LayerFactory.Instance.CreateLayer(uri, MapView.Active.Map));
Create a raster layer
string url = @"C:\Images\Italy.tif";
await QueuedTask.Run(() =>
{
// Create a raster layer using a path to an image.
// Note: You can create a raster layer from a url, project item, or data connection.
rasterLayer = LayerFactory.Instance.CreateLayer(new Uri(url), aMap) as RasterLayer;
});
Create a mosaic layer
MosaicLayer mosaicLayer = null;
string url = @"C:\Images\countries.gdb\Italy";
await QueuedTask.Run(() =>
{
// Create a mosaic layer using a path to a mosaic dataset.
// Note: You can create a mosaic layer from a url, project item, or data connection.
mosaicLayer = LayerFactory.Instance.CreateLayer(new Uri(url), aMap) as MosaicLayer;
});
Create an image service layer
ImageServiceLayer isLayer = null;
string url =
@"http://imagery.arcgisonline.com/arcgis/services/LandsatGLS/GLS2010_Enhanced/ImageServer";
await QueuedTask.Run(() =>
{
// Create an image service layer using the url for an image service.
isLayer = LayerFactory.Instance.CreateLayer(new Uri(url), aMap) as ImageServiceLayer;
});
Create a stream layer with a definition query
//Must be on the QueuedTask
var url = "https://geoeventsample1.esri.com:6443/arcgis/rest/services/AirportTraffics/StreamServer";
var lyrCreateParam = new FeatureLayerCreationParams(new Uri(url))
{
IsVisible = true,
//At 2.x - DefinitionFilter = new CIMDefinitionFilter()
//{
// DefinitionExpression = "RWY = '29L'",
// Name = "Runway"
//}
DefinitionQuery = new DefinitionQuery(whereClause: "RWY = '29L'", name: "Runway")
};
var streamLayer = LayerFactory.Instance.CreateLayer<StreamLayer>(lyrCreateParam, map);
Create a stream layer with a simple renderer
var url = @"https://geoeventsample1.esri.com:6443/arcgis/rest/services/LABus/StreamServer";
var uri = new Uri(url, UriKind.Absolute);
//Must be on QueuedTask!
var createParams = new FeatureLayerCreationParams(uri)
{
RendererDefinition = new SimpleRendererDefinition()
{
SymbolTemplate = SymbolFactory.Instance.ConstructPointSymbol(
ColorFactory.Instance.BlueRGB,
12,
SimpleMarkerStyle.Pushpin).MakeSymbolReference()
}
};
var streamLayer = LayerFactory.Instance.CreateLayer<StreamLayer>(
createParams, map);
Setting a unique value renderer for latest observations
var url = @"https://geoeventsample1.esri.com:6443/arcgis/rest/services/AirportTraffics/StreamServer";
var uri = new Uri(url, UriKind.Absolute);
//Must be on QueuedTask!
var createParams = new FeatureLayerCreationParams(uri)
{
IsVisible = false
};
var streamLayer = LayerFactory.Instance.CreateLayer<StreamLayer>(
createParams, map);
//Define the unique values by hand
var uvr = new CIMUniqueValueRenderer()
{
Fields = new string[] { "ACTYPE" },
UseDefaultSymbol = true,
DefaultLabel = "Others",
DefaultSymbol = SymbolFactory.Instance.ConstructPointSymbol(
CIMColor.CreateRGBColor(185, 185, 185), 8, SimpleMarkerStyle.Hexagon).MakeSymbolReference()
};
var classes = new List<CIMUniqueValueClass>();
//add in classes - one for ACTYPE of 727, one for DC 9
classes.Add(
new CIMUniqueValueClass() {
Values = new CIMUniqueValue[] {
new CIMUniqueValue() { FieldValues = new string[] { "B727" } } },
Visible = true,
Label = "Boeing 727",
Symbol = SymbolFactory.Instance.ConstructPointSymbol(
ColorFactory.Instance.RedRGB, 10, SimpleMarkerStyle.Hexagon).MakeSymbolReference()
});
classes.Add(
new CIMUniqueValueClass()
{
Values = new CIMUniqueValue[] {
new CIMUniqueValue() { FieldValues = new string[] { "DC9" } } },
Visible = true,
Label = "DC 9",
Symbol = SymbolFactory.Instance.ConstructPointSymbol(
ColorFactory.Instance.GreenRGB, 10, SimpleMarkerStyle.Hexagon).MakeSymbolReference()
});
//add the classes to a group
var groups = new List<CIMUniqueValueGroup>()
{
new CIMUniqueValueGroup() {
Classes = classes.ToArray()
}
};
//add the groups to the renderer
uvr.Groups = groups.ToArray();
//Apply the renderer (for current observations)
streamLayer.SetRenderer(uvr);
streamLayer.SetVisibility(true);//turn on the layer
Create Voxel Layer
//Must be on the QueuedTask.Run()
//Must be a .NetCDF file for voxels
var url = @"C:\MyData\AirQuality_Redlands.nc";
var cim_connection = new CIMVoxelDataConnection()
{
URI = url
};
//Create a VoxelLayerCreationParams
var createParams = VoxelLayerCreationParams.Create(cim_connection);
createParams.IsVisible = true;
//Can also just use the path directly...
//var createParams = VoxelLayerCreationParams.Create(url);
//Use VoxelLayerCreationParams to enumerate the variables within
//the voxel
var variables = createParams.Variables;
foreach (var variable in variables)
{
var line = $"{variable.Variable}: {variable.DataType}, " +
$"{variable.Description}, {variable.IsDefault}, {variable.IsSelected}";
System.Diagnostics.Debug.WriteLine(line);
}
//Optional: set the default variable
createParams.SetDefaultVariable(variables.Last());
//Create the layer - map must be a local scene
VoxelLayer voxelLayer = LayerFactory.Instance.CreateLayer<VoxelLayer>(createParams, map);
Target Platforms: Windows 11, Windows 10
ArcGIS Pro version: 3 or higher.