Package org.hortonmachine.gears.modules.r.tmsgenerator

Class MBTilesHelper

java.lang.Object

org.hortonmachine.gears.modules.r.tmsgenerator.MBTilesHelper

All Implemented Interfaces:

AutoCloseable

public class MBTilesHelper
extends Object
implements AutoCloseable

Field Summary

Fields

Modifier and Type	Field	Description
static String	COL_METADATA_NAME
static String	COL_METADATA_VALUE
static String	COL_TILES_TILE_COLUMN
static String	COL_TILES_TILE_DATA
static String	COL_TILES_TILE_ROW
static String	COL_TILES_ZOOM_LEVEL
static String	SELECTQUERY
static String	TABLE_METADATA
static String	TABLE_TILES
static int	TILESIZE	We have a fixed tile size.

Constructor Summary

Constructors

Constructor	Description
MBTilesHelper()

Method Summary

Modifier and Type	Method	Description
void	addTile(int x, int y, int z, BufferedImage image, String format)
void	addTileBatch(int x, int y, int z, BufferedImage image, String format, boolean sendBatch)
void	close()
void	createIndexes()
void	createTables(boolean makeIndexes)
void	fillMetadata(float n, float s, float w, float e, String name, String format, int minZoom, int maxZoom)
double[]	getBounds()	Get the bounds as [w,s,e,n]
String	getImageFormat()
BufferedImage	getTile(int x, int y, int z)	Get a Tile image from the database.
static int[]	getTileXY(double lat, double lon, int zoom)
void	open(File dbFile)
static BufferedImage	readGridcoverageImageForTile(org.geotools.coverage.grid.io.AbstractGridCoverage2DReader reader, int x, int y, int zoom, org.opengis.referencing.crs.CoordinateReferenceSystem resampleCrs)	Read the image of a tile from a generic geotools coverage reader.
static org.locationtech.jts.geom.Envelope	tile2boundingBox(int x, int y, int zoom)
static double	tile2lat(int y, int z)
static double	tile2lon(int x, int z)
void	triggerLastBatch()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

TILESIZE

public static final int TILESIZE

We have a fixed tile size.

See Also:

Constant Field Values

TABLE_TILES

public static final String TABLE_TILES

See Also:

Constant Field Values

COL_TILES_ZOOM_LEVEL

public static final String COL_TILES_ZOOM_LEVEL

See Also:

Constant Field Values

COL_TILES_TILE_COLUMN

public static final String COL_TILES_TILE_COLUMN

See Also:

Constant Field Values

COL_TILES_TILE_ROW

public static final String COL_TILES_TILE_ROW

See Also:

Constant Field Values

COL_TILES_TILE_DATA

public static final String COL_TILES_TILE_DATA

See Also:

Constant Field Values

SELECTQUERY

public static final String SELECTQUERY

See Also:

Constant Field Values

TABLE_METADATA

public static final String TABLE_METADATA

See Also:

Constant Field Values

COL_METADATA_NAME

public static final String COL_METADATA_NAME

See Also:

Constant Field Values

COL_METADATA_VALUE

public static final String COL_METADATA_VALUE

See Also:

Constant Field Values

Constructor Detail

MBTilesHelper

public MBTilesHelper()

Method Detail

open

public void open(File dbFile)
          throws SQLException

Throws:

SQLException

close

public void close()

Specified by:

close in interface AutoCloseable

createTables

public void createTables(boolean makeIndexes)
                  throws SQLException

Throws:

SQLException

createIndexes

public void createIndexes()
                   throws SQLException

Throws:

SQLException

fillMetadata

public void fillMetadata(float n,
                         float s,
                         float w,
                         float e,
                         String name,
                         String format,
                         int minZoom,
                         int maxZoom)
                  throws SQLException

Throws:

SQLException

addTile

public void addTile(int x,
                    int y,
                    int z,
                    BufferedImage image,
                    String format)
             throws Exception

Throws:

Exception

addTileBatch

public void addTileBatch(int x,
                         int y,
                         int z,
                         BufferedImage image,
                         String format,
                         boolean sendBatch)
                  throws Exception

Throws:

Exception

triggerLastBatch

public void triggerLastBatch()

getTile

public BufferedImage getTile(int x,
                             int y,
                             int z)
                      throws Exception

Get a Tile image from the database.

Parameters:

x -

y -

z -

Returns:

Throws:

Exception

getBounds

public double[] getBounds()
                   throws Exception

Get the bounds as [w,s,e,n]

Returns:

Throws:

Exception

getImageFormat

public String getImageFormat()
                      throws Exception

Returns:

the image format (jpg, png).

Throws:

Exception

readGridcoverageImageForTile

public static BufferedImage readGridcoverageImageForTile(org.geotools.coverage.grid.io.AbstractGridCoverage2DReader reader,
                                                         int x,
                                                         int y,
                                                         int zoom,
                                                         org.opengis.referencing.crs.CoordinateReferenceSystem resampleCrs)
                                                  throws IOException

Read the image of a tile from a generic geotools coverage reader.

Parameters:

reader - the reader, expected to be in CRS 3857.

x - the tile x.

y - the tile y.

zoom - the zoomlevel.

Returns:

the image.

Throws:

IOException

tile2lon

public static double tile2lon(int x,
                              int z)

tile2lat

public static double tile2lat(int y,
                              int z)

getTileXY

public static int[] getTileXY(double lat,
                              double lon,
                              int zoom)

tile2boundingBox

public static org.locationtech.jts.geom.Envelope tile2boundingBox(int x,
                                                                  int y,
                                                                  int zoom)