MapPackage.CreateMetadataWriter Method

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

CreateMetadataWriter()

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

Syntax

public GeoPackageMetadataWriter CreateMetadataWriter ()

Return Value

Type: GeoPackageMetadataWriter
A GeoPackageMetadataWriter.

Example

// Save metadata to a GeoPackage file
static void createAndSaveMetadataToGeoPackage(string fileName)
{
    // Create new map package
    MapPackage mapPackage = new MapPackage(fileName);

    // Create a vector table
    string tableName = "places";
    MapPackageVectorTable vectorTable = new MapPackageVectorTable(tableName, Crs.Wgs84LongLat);
    // Create vector writer
    var vectorWriter = mapPackage.CreateVectorWriter(vectorTable);

    // Start a transaction
    using (var txn = vectorWriter.BeginTransaction())
    {
        // Commit transaction to write the table
        txn.Commit();
    }

    // Create two metadata entries, one for the entire package, and one for the table
    var packageMetadata = new GeoPackageMetadata(GeoPackageMetadataScope.Series, // scope
                                                 "example.com", // uri
                                                 "Some interesting package metadata"); // metadata
    var tableMetadata = new GeoPackageMetadata(GeoPackageMetadataScope.Dataset,
                                               "example.com",
                                               "Some interesting table metadata");

    // Create a metadata writer
    GeoPackageMetadataWriter metadataWriter = mapPackage.CreateMetadataWriter();

	// Start a transaction
    using (var txn = metadataWriter.BeginTransaction())
    {

        // Write the metadata, save the references for each respective entry
        long packageMetadataRef = metadataWriter.WriteMetadata(packageMetadata);
        long tableMetadataRef = metadataWriter.WriteMetadata(tableMetadata);

        // Write the respective references
        metadataWriter.WritePackageReference(packageMetadataRef);
        metadataWriter.WriteTableReference(tableMetadataRef, tableName);

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

Platforms

Windows, Linux, Android

MapPackage::createMetadataWriter Method

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

createMetadataWriter()

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

Syntax

C++

public:
GeoPackageMetadataWriterPtr createMetadataWriter ()

Return Value

Type: GeoPackageMetadataWriter
A GeoPackageMetadataWriter.

Example

C++

// Save metadata to a GeoPackage file
void createAndSaveMetadataToGeoPackage(const char* fileName)
{
        // Create new map package
    MapPackagePtr mapPackage = new MapPackage(fileName);

    // Create a vector table
    const char* tableName = "places";
    MapPackageVectorTablePtr vectorTable = new MapPackageVectorTable(tableName, Crs::wgs84LongLat());

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

    // Start a transaction and commit it to write the table.
    MapPackageTransactionPtr txn = vectorWriter->beginTransaction();
    txn->commit();

    // Create two metadata entries, one for the entire package, and one for the table
    GeoPackageMetadataPtr packageMetadata = new GeoPackageMetadata(GeoPackageMetadataScopeSeries, // scope
                                                                   "example.com", // uri
                                                                   "Some interesting package metadata"); // metadata
    GeoPackageMetadataPtr tableMetadata = new GeoPackageMetadata(GeoPackageMetadataScopeDataset,
                                                                   "example.com",
                                                                   "Some interesting table metadata");

    // Create a metadata writer
    GeoPackageMetadataWriterPtr metadataWriter = mapPackage->createMetadataWriter();

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

    // Write the metadata, save the references for each respective entry
    int64_t packageMetadataRef = metadataWriter->writeMetadata(packageMetadata);
    int64_t tableMetadataRef = metadataWriter->writeMetadata(tableMetadata);

    // Write the respective references
    metadataWriter->writePackageReference(packageMetadataRef);
    metadataWriter->writeTableReference(tableMetadataRef, tableName);

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

Platforms

Windows, Linux, Android

MapPackage.createMetadataWriter Method

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

createMetadataWriter()

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

Syntax

Java

public final GeoPackageMetadataWriter createMetadataWriter ()

Return Value

Type: GeoPackageMetadataWriter
A GeoPackageMetadataWriter.

Example

Java

// Save metadata to a GeoPackage file
static void createAndSaveMetadataToGeoPackage(String fileName)
{
    // Create new map package
    MapPackage mapPackage = new MapPackage(fileName);

    // Create a vector table
    String tableName = "places";
    MapPackageVectorTable vectorTable = new MapPackageVectorTable(tableName, Crs.getWgs84LongLat());

    // Create two metadata entries, one for the entire package, and one for the table
    GeoPackageMetadata packageMetadata = new GeoPackageMetadata(GeoPackageMetadataScope.SERIES, // scope
                                                                "example.com", // uri
                                                                "Some interesting package metadata"); // metadata
    GeoPackageMetadata tableMetadata = new GeoPackageMetadata(GeoPackageMetadataScope.DATASET,
                                                              "example.com",
                                                              "Some interesting table metadata");

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

    MapPackageTransaction txn = null;
    try
    {
        // Start a transaction and and commit it to write the table.
        txn = vectorWriter.beginTransaction();
        txn.commit();
        txn = null;
    }
    catch (Throwable e)
    {
    }
    finally
    {
        if (txn != null)
            txn.rollback();
        txn = null;
    }

    // Create a metadata writer
    GeoPackageMetadataWriter metadataWriter = mapPackage.createMetadataWriter();

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

        // Write the metadata, save the references for each respective entry
        long packageMetadataRef = metadataWriter.writeMetadata(packageMetadata);
        long tableMetadataRef = metadataWriter.writeMetadata(tableMetadata);

        // Write the respective references
        metadataWriter.writePackageReference(packageMetadataRef);
        metadataWriter.writeTableReference(tableMetadataRef, tableName);

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

Platforms

Windows, Linux, Android

MapPackage.createMetadataWriter Method

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

createMetadataWriter()

Creates a GeoPackageMetadataWriter to create and write metadata to an OGC GeoPackage file.

Syntax

Python

GeoPackageMetadataWriter createMetadataWriter (  )

Return Value

Type: GeoPackageMetadataWriter
A GeoPackageMetadataWriter.

Example

Python

# Save metadata to a GeoPackage file
def CreateAndSaveMetadataToGeoPackage(fileName):

    # Create new map package
    mapPackage = MapPackage(filename)

    # Create a vector table
    tableName = "places"
    vectorTable = MapPackageVectorTable(tableName, Crs.wgs84LongLat)

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

    # Start a transaction and commit it to write the table
    txn = vectorWriter.beginTransaction()
    txn.commit()

    # Create two metadata entries, one for the entire package, and one for the table
    packageMetadata = GeoPackageMetadata(GeoPackageMetadataScope.Series, # scope
                                         "example.com", # uri
                                         "Some interesting package metadata") # metadata
    tableMetadata = GeoPackageMetadata(GeoPackageMetadataScope.Dataset,
                                       "example.com",
                                       "Some interesting table metadata")

    # Create a metadata writer
    metadataWriter = mapPackage.createMetadataWriter()

    # Start a transaction
    txn = metadataWriter.beginTransaction()

    # Write the metadata, save the references for each respective entry
    packageMetadataRef = metadataWriter.writeMetadata(packageMetadata)
    tableMetadataRef = metadataWriter.writeMetadata(tableMetadata)

    # Write the respective references
    metadataWriter.writePackageReference(packageMetadataRef)
    metadataWriter.writeTableReference(tableMetadataRef, tableName)

    # Commit transaction
    txn.commit()

Platforms

Windows, Linux, Android

MapPackage.CreateMetadataWriter Method

In this article

CreateMetadataWriter()

Syntax

Return Value

Example

Platforms

See Also

Reference

MapPackage::createMetadataWriter Method

In this article

createMetadataWriter()

Syntax

Return Value

Example

Platforms

See Also

Reference

MapPackage.createMetadataWriter Method

In this article

createMetadataWriter()

Syntax

Return Value

Example

Platforms

See Also

Reference

MapPackage.createMetadataWriter Method

In this article

createMetadataWriter()

Syntax

Return Value

Example

Platforms

See Also

Reference