MapPackage.CreateVectorWriter Method

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

CreateVectorWriter(MapPackageVectorTable table)

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

Syntax

public MapPackageVectorWriter CreateVectorWriter (
    MapPackageVectorTable table
)

Parameters

table

Type: MapPackageVectorTable
The MapPackageTable to create and write to in the OGC GeoPackage.

Return Value

Type: MapPackageVectorWriter
A MapPackageVectorWriter.

Remarks

Use this method when you want to use the MapPackageVectorWriter.WriteFeature method to write vector data to a GeoPackage. The features will be written to a new table in the OGC GeoPackage file this MapPackage is connected to.

Example

// Save features in a MemoryDataSet to a GeoPackage file
static void SaveFeaturesToGeoPackage(string filename, MemoryDataSet ds)
{
    // Create new map package
    var mapPackage = new MapPackage(filename);

    // Create a vector table
    var vectorTable = new MapPackageVectorTable("places", ds.Crs);

    // Include the name and size attributes when writing features to the vector table
    vectorTable.Attributes.Add(new MapPackageAttribute("name", AttributeType.String));
    vectorTable.Attributes.Add(new MapPackageAttribute("size", AttributeType.Double));

    // Create vector writer
    var vectorWriter = mapPackage.CreateVectorWriter(vectorTable);

    // Start a transaction
    using (var txn = vectorWriter.BeginTransaction())
    {
        // Write features from the memory data set to the GeoPackage file
        var fe = ds.GetFeatures().GetEnumerator();
        while (fe.MoveNext())
        {
            vectorWriter.WriteFeature(fe.Current);
        }

        // Commit transaction
        txn.Commit();
    }
}

Platforms

Windows, Linux, Android

MapPackage::createVectorWriter Method

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

createVectorWriter(const MapPackageVectorTablePtr& table)

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

Syntax

C++

public:
MapPackageVectorWriterPtr createVectorWriter (
    const MapPackageVectorTablePtr& table
)

Parameters

table

Type: MapPackageVectorTable
The MapPackageTable to create and write to in the OGC GeoPackage.

Return Value

Type: MapPackageVectorWriter
A MapPackageVectorWriter.

Remarks

Use this method when you want to use the MapPackageVectorWriter::writeFeature method to write vector data to a GeoPackage. The features will be written to a new table in the OGC GeoPackage file this MapPackage is connected to.

Example

C++

// Save features in a MemoryDataSet to a GeoPackage file
void saveFeaturesToGeoPackage(const char* filename, const MemoryDataSetPtr& ds)
{
    // Create new map package
    MapPackagePtr mapPackage = new MapPackage(filename);

    // Create a vector table
    MapPackageVectorTablePtr vectorTable = new MapPackageVectorTable("places", ds->crs());

    // Include the name and size attributes when writing features to the vector table
    vectorTable->attributes()->add(new MapPackageAttribute("name", AttributeTypeString));
    vectorTable->attributes()->add(new MapPackageAttribute("size", AttributeTypeDouble));

    // Create vector writer
    MapPackageVectorWriterPtr vectorWriter = mapPackage->createVectorWriter(vectorTable);

    // Start a transaction
    MapPackageTransactionPtr txn = vectorWriter->beginTransaction();

    // Write features from the memory data set to the GeoPackage file
    FeatureEnumeratorPtr fe = ds->getFeatures();
    while (fe->moveNext())
    {
        vectorWriter->writeFeature(fe->current());
    }

    // Commit transaction
    txn->commit();
}

Platforms

Windows, Linux, Android

MapPackage.createVectorWriter Method

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

createVectorWriter(MapPackageVectorTable table)

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

Syntax

Java

public final MapPackageVectorWriter createVectorWriter (
    MapPackageVectorTable table
)

Parameters

table

Type: MapPackageVectorTable
The MapPackageTable to create and write to in the OGC GeoPackage.

Return Value

Type: MapPackageVectorWriter
A MapPackageVectorWriter.

Remarks

Use this method when you want to use the MapPackageVectorWriter.writeFeature method to write vector data to a GeoPackage. The features will be written to a new table in the OGC GeoPackage file this MapPackage is connected to.

Example

Java

// Save features in a MemoryDataSet to a GeoPackage file
static void saveFeaturesToGeoPackage(String filename, MemoryDataSet ds)
{
    // Create new map package
    MapPackage mapPackage = new MapPackage(filename);

    // Create a vector table
    MapPackageVectorTable vectorTable = new MapPackageVectorTable("places", ds.getCrs());

    // Include the name and size attributes when writing features to the vector table
    vectorTable.getAttributes().add(new MapPackageAttribute("name", AttributeType.STRING));
    vectorTable.getAttributes().add(new MapPackageAttribute("size", AttributeType.DOUBLE));

    // Create vector writer
    MapPackageVectorWriter vectorWriter = mapPackage.createVectorWriter(vectorTable);

    MapPackageTransaction txn = null;
    try
    {
        // Start a transaction
        txn = vectorWriter.beginTransaction();

        // Write features from the memory data set to the GeoPackage file
        FeatureEnumerator fe = ds.getFeatures();
        while (fe.moveNext())
        {
            vectorWriter.writeFeature(fe.getCurrent());
        }

        // Commit transaction
        txn.commit();
        txn = null;
    }
    catch (Throwable e)
    {
    }
    finally
    {
        if (txn != null)
            txn.rollback();
        txn = null;
    }
}

Platforms

Windows, Linux, Android

MapPackage.createVectorWriter Method

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

createVectorWriter(table)

Creates a MapPackageVectorWriter to create and write vector data to a new table in an OGC GeoPackage file.

Syntax

Python

MapPackageVectorWriter createVectorWriter ( table )

Parameters

table

Type: MapPackageVectorTable
The MapPackageTable to create and write to in the OGC GeoPackage.

Return Value

Type: MapPackageVectorWriter
A MapPackageVectorWriter.

Remarks

Example

Python

# Save features in a MemoryDataSet to a GeoPackage file
def SaveFeaturesToGeoPackage(filename, ds):

    # Create new map package
    mapPackage = MapPackage(filename)

    # Create a vector table
    vectorTable = MapPackageVectorTable("places", ds.crs)

    # Include the name and size attributes when writing features to the vector table
    vectorTable.attributes.append(MapPackageAttribute("name", AttributeType.String))
    vectorTable.attributes.append(MapPackageAttribute("size", AttributeType.Double))

    # Create vector writer
    vectorWriter = mapPackage.createVectorWriter(vectorTable)

    # Start a transaction
    txn = vectorWriter.beginTransaction()

    # Write features from the memory data set to the GeoPackage file
    fe = ds.getFeatures()
    while fe.moveNext():
        vectorWriter.writeFeature(fe.current())

    # Commit transaction
    txn.commit()

Platforms

Windows, Linux, Android

MapPackage.CreateVectorWriter Method

In this article

CreateVectorWriter(MapPackageVectorTable table)

Syntax

Parameters

Return Value

Remarks

Example

Platforms

See Also

Reference

MapPackage::createVectorWriter Method

In this article

createVectorWriter(const MapPackageVectorTablePtr& table)

Syntax

Parameters

Return Value

Remarks

Example

Platforms

See Also

Reference

MapPackage.createVectorWriter Method

In this article

createVectorWriter(MapPackageVectorTable table)

Syntax

Parameters

Return Value

Remarks

Example

Platforms

See Also

Reference

MapPackage.createVectorWriter Method

In this article

createVectorWriter(table)

Syntax

Parameters

Return Value

Remarks

Example

Platforms

See Also

Reference