// the constructor for the Feature Class Management class
public GoogleMapsEngineFeatureClassManagement(MapsEngine.API.GoogleMapsEngineAPI api)
{
// initialize and configure log4net, reading from Xml .config file
log4net.Config.XmlConfigurator.Configure(new System.IO.FileInfo("log4net.config"));
log.Info("GoogleMapsEngineFeatureClassManagement initializing.");
// retrieve a reference to the extension
log.Debug("Retrieiving a reference to the extension object.");
ext = GoogleMapsEngineToolsExtensionForArcGIS.GetExtension();
// initiate the Google Maps Enigne API object
log.Debug("Setting the GME API object.");
this.api = api;
// generate a worldwide polygon, for default (spatial geometry undetermined or undefined) assets
log.Debug("Establishing a default worldwide polygon object.");
IPoint pUL = new Point();
pUL.X = -180;
pUL.Y = 90;
IPoint pLL = new Point();
pLL.X = -180;
pLL.Y = -90;
IPoint pLR = new Point();
pLR.X = 180;
pLR.Y = -90;
IPoint pUR = new Point();
pUR.X = 180;
pUR.Y = 90;
// add the points to the point collection
IPointCollection pPtColl = new Polygon();
pPtColl.AddPoint(pUL, Type.Missing, Type.Missing);
pPtColl.AddPoint(pUR, Type.Missing, Type.Missing);
pPtColl.AddPoint(pLR, Type.Missing, Type.Missing);
pPtColl.AddPoint(pLL, Type.Missing, Type.Missing);
pPtColl.AddPoint(pUL, Type.Missing, Type.Missing);
// define the polygon as a list of points, then close the polygon
worldPolygon = (IPolygon)pPtColl;
worldPolygon.Close();
}
/*
* A function to populate a referenced FeatureClass (fc) with the contents of a Google Maps Engine map
*/
public void populateFCWithGoogleMapsEngineMap(ref IFeatureClass fc, ref MapsEngine.DataModel.gme.Map map)
{
// create a feature object
log.Debug("Creating a new Feature object to be used later in populating the FC.");
IFeature feature = fc.CreateFeature();
log.Debug("Creating feature for map " + map.id);
// create a projectId value from the MapId
String projectId = map.id.Split("-".ToCharArray())[0];
// Update the values for this feature
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_CustomerId_Name), projectId);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_CustomerId_Name + ": " + projectId);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetId_Name), map.id);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetId_Name + ": " + map.id);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_MapAssetId_Name), map.id);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_MapAssetId_Name + ": " + map.id);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetType_Name), "map");
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetType_Name + ": " + "map");
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetName_Name), map.name);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetName_Name + ": " + map.name);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_ParentAssetId_Name), projectId);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_ParentAssetId_Name + ": " + projectId);
// attempt to set the description
try
{
// attempt to set the feature description (truncating if necessary)
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetDescription_Name)
, map.description.Length > 256
? map.description.Substring(0, 252) + "..."
: map.description);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetDescription_Name + ": " + map.description);
}
catch (System.Exception ex)
{
// warn
log.Warn(ex);
}
// check to see if the bbox object is not null
log.Debug("Adding spatial representation if available.");
if (map.bbox != null && map.bbox.Count() == 4)
{
// deterine the maximum and minimum bounds of all layers within this map
// 0=West, 1=South, 2=East, 3=North
double XMAX = map.bbox[2];
log.Debug("XMAX: " + XMAX);
double YMAX = map.bbox[3];
log.Debug("YMAX: " + YMAX);
double XMIN = map.bbox[0];
log.Debug("XMIN: " + XMIN);
double YMIN = map.bbox[1];
log.Debug("YMIN: " + YMIN);
// determine the map extent based on the layers maximum extent
IPoint pExtentNE = new Point();
pExtentNE.X = XMAX;
pExtentNE.Y = YMAX;
IPoint pExtentSW = new Point();
pExtentSW.X = XMIN;
pExtentSW.Y = YMIN;
IPoint pExtentNW = new Point();
pExtentNW.X = XMIN;
pExtentNW.Y = YMAX;
IPoint pExtentSE = new Point();
pExtentSE.X = XMAX;
pExtentSE.Y = YMIN;
// define the polygon bounding box (NE/SW) as a point collection
log.Debug("Building polygon object.");
IPointCollection pExtentPointCol = new Polygon();
pExtentPointCol.AddPoint(pExtentNE, Type.Missing, Type.Missing);
pExtentPointCol.AddPoint(pExtentSE, Type.Missing, Type.Missing);
pExtentPointCol.AddPoint(pExtentSW, Type.Missing, Type.Missing);
pExtentPointCol.AddPoint(pExtentNW, Type.Missing, Type.Missing);
// create a polygon, p, from the point collection, then close the polygon
IPolygon pExtent = (IPolygon)pExtentPointCol;
pExtent.Close();
// add the polygon, p, as the new feature's geometry
if (pExtent != null)
{
log.Debug("Setting feature's geometry.");
feature.Shape = pExtent;
}
else
{
log.Warn("Polygon is not valid, setting feature geometry to default worldwide.");
feature.Shape = worldPolygon;
}
}
else
{
// no spatial information contained, use world
log.Warn("No spatial representation, setting feature geometry to default worldwide.");
//feature.Shape = worldPolygon;
}
// Commit the new feature to fc
log.Debug("Storing feature.");
feature.Store();
// add all child layers within this map
log.Debug("Verifying the map has layers.");
if (map.layers != null)
{
// go through each layer in the map
log.Debug("Going through each layer in the map.");
foreach (MapsEngine.DataModel.gme.MapLayer layer in map.layers)
{
// populate the features in the layer
log.Debug("Processing layer " + layer.id);
populateFCWithGoogleMapsEngineLayer(ref fc, map.id, map.id, layer);
}
}
// Verifying the map has a folders object
log.Debug("Verifying the map has a folders object.");
if (map.folders != null && map.folders.Count() > 0)
{
// populate the features in the folder
log.Debug("Processing folders");
populateFCWithGoogleMapsEngineFolders(ref fc, map.id, map.id, map.folders);
}
}
/*
* A function to populate a referenced Feature Class (fc) with the contents of a Google Maps Engine map layer
*/
protected void populateFCWithGoogleMapsEngineLayer(ref IFeatureClass fc, string mapId, string parentId, MapsEngine.DataModel.gme.MapLayer layer)
{
// create a new feature
IFeature feature;
log.Debug("Creating a feature for layer " + layer.id);
// attempt to process the assets within a the layer
try
{
// fetch the layer asset object from the API
log.Debug("Fetching an asset object for the layer.");
MapsEngine.DataModel.gme.Asset layerAsset = api.getAssetById(ext.getToken(), layer.id);
// create a new feature
log.Debug("Creating a new feature.");
feature = fc.CreateFeature();
// Update the values for this feature
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_CustomerId_Name), mapId.Split("-".ToCharArray())[0]);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_CustomerId_Name + ": " + mapId.Split("-".ToCharArray())[0]);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetId_Name), layer.id);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetId_Name + ": " + layer.id);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_MapAssetId_Name), mapId);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_MapAssetId_Name + ": " + mapId);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetType_Name), layerAsset.type);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetType_Name + ": " + layerAsset.type);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetName_Name), layerAsset.name);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetName_Name + ": " + layerAsset.name);
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_ParentAssetId_Name), parentId);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_ParentAssetId_Name + ": " + parentId);
// attempt to set the description object
try
{
// set the layer description value (truncate if necessary)
feature.set_Value(fc.FindField(Properties.Resources.GeodatabaseUtilities_schema_AssetDescription_Name)
, layerAsset.description.Length > 256
? layerAsset.description.Substring(0, 252) + "..."
: layerAsset.description);
log.Debug(Properties.Resources.GeodatabaseUtilities_schema_AssetDescription_Name + ": " + layerAsset.description);
}
catch (System.Exception ex)
{
// log warning
log.Warn(ex);
}
// verify the layer has a bbox and has two valid points
if (layerAsset.bbox != null && layerAsset.bbox.Count() == 4)
{
// deterine the maximum and minimum bounds of all layers within this map
// 0=West, 1=South, 2=East, 3=North
double XMAX = layerAsset.bbox[2];
log.Debug("XMAX: " + XMAX);
double YMAX = layerAsset.bbox[3];
log.Debug("YMAX: " + YMAX);
double XMIN = layerAsset.bbox[0];
log.Debug("XMIN: " + XMIN);
double YMIN = layerAsset.bbox[1];
log.Debug("YMIN: " + YMIN);
// determine the map extent based on the layers maximum extent
IPoint pExtentNE = new Point();
pExtentNE.X = XMAX;
pExtentNE.Y = YMAX;
IPoint pExtentSW = new Point();
pExtentSW.X = XMIN;
pExtentSW.Y = YMIN;
IPoint pExtentNW = new Point();
pExtentNW.X = XMIN;
pExtentNW.Y = YMAX;
IPoint pExtentSE = new Point();
pExtentSE.X = XMAX;
pExtentSE.Y = YMIN;
// define the polygon bounding box (NE/SW) as a point collection
IPointCollection pExtentPointCol = new Polygon();
pExtentPointCol.AddPoint(pExtentNE, Type.Missing, Type.Missing);
pExtentPointCol.AddPoint(pExtentSE, Type.Missing, Type.Missing);
pExtentPointCol.AddPoint(pExtentSW, Type.Missing, Type.Missing);
pExtentPointCol.AddPoint(pExtentNW, Type.Missing, Type.Missing);
// create a polygon, p, from the point collection, then close the polygon
IPolygon pExtent = (IPolygon)pExtentPointCol;
pExtent.Close();
// add the polygon, p, as the new feature's geometry
if (pExtent != null)
{
// set the shape geometry
log.Debug("Setting the feature's geometry as the polygon.");
feature.Shape = pExtent;
}
else
{
// set the feature's goemetry as the default world
log.Debug("Invalid spatial representation, setting feature goemtry as the world.");
feature.Shape = worldPolygon;
}
}
else
{
// the layer does not have spatial information
log.Warn("Layer has no bbox information");
//feature.Shape = worldPolygon;
}
// Commit the new feature to fc
log.Debug("Storing feature.");
feature.Store();
}
catch (Exception ex)
{
// log the warning
log.Warn(ex);
}
}