コード例 #1
0
ファイル: Vector.cs プロジェクト: tarinishukla/gcd
        private void _load(bool leaveopen = false)
        {
            Open();

            // Populate some important metadata
            Layer mLayer = _ds.GetLayerByIndex(0);

            FIDColumn = mLayer.GetFIDColumn();
            LayerName = mLayer.GetName();

            _geometryType = new GDalGeometryType(mLayer.GetGeomType());

            // Get our FEATURE definitions
            Feature mFeat = mLayer.GetNextFeature();

            while (mFeat != null)
            {
                Geometry geo = mFeat.GetGeometryRef();
                if (geo == null)
                {
                    Debug.WriteLine(String.Format("Warning: Null Geometry Detected: FID:{0}", mFeat.GetFID()));
                }
                else
                {
                    int count = geo.GetGeometryCount();
                    if (count > 1)
                    {
                        if (_geometryType.SimpleType == SimpleTypes.Point || _geometryType.SimpleType == SimpleTypes.LineString)
                        {
                            Exception ex = new Exception("Multi-part geometries are detected in this file. This is not allowed.");
                            ex.Data["File Path"] = GISFileInfo.FullName;
                            ex.Data["Solution"]  = "Remove all multipart features from this ShapeFile.";
                            throw ex;
                        }
                        else
                        {
                            Debug.WriteLine(String.Format("Warning: Multipart feature detected: FID:{0}", mFeat.GetFID()));
                        }
                    }
                }

                Features.Add(mFeat.GetFID(), new VectorFeature(mFeat));

                mFeat = mLayer.GetNextFeature();
            }

            // Now get our FIELD definitions
            FeatureDefn mFeatDfn = mLayer.GetLayerDefn();
            int         iFldCnt  = mFeatDfn.GetFieldCount();

            for (int fldId = 0; fldId < iFldCnt; fldId++)
            {
                FieldDefn mFldDef = mFeatDfn.GetFieldDefn(fldId);
                Fields.Add(mFldDef.GetName(), new VectorField(mFldDef, fldId));
            }

            // Spatial is way harder than it needs to be:
            OSGeo.OSR.SpatialReference sRef = mLayer.GetSpatialRef();
            if (sRef == null)
            {
                Exception ex = new Exception("Feature class is missing spatial reference");
                ex.Data["Path"] = GISFileInfo.FullName;
                throw ex;
            }

            string sRefstring = "";

            sRef.ExportToWkt(out sRefstring);
            _Init(sRefstring);

            if (!leaveopen)
            {
                UnloadDS();
            }
        }
コード例 #2
0
 public GDalGeometryType(GDalGeometryType origGType)
 {
     _origType = origGType._origType;
 }