return Collections.emptyMap();
}
ReferencedEnvelope extent = normalizeExtent(renderJob.getMapExtentTileCrs());
WMTTileFactory tileFactory = getTileFactory();
WMTZoomLevel zoomLevel = tileFactory.getZoomLevel(getZoomLevelToUse(renderJob.getZoomLevelMatcher(),
scaleFactor, recommendedZoomLevel, layerProperties), this);
long maxNumberOfTiles = zoomLevel.getMaxTileNumber();
Map<String, Tile> tileList = new HashMap<String, Tile>();
WMTPlugin.debug("[WMTSource.cutExtentIntoTiles] Zoom-Level: " + zoomLevel.getZoomLevel() + //$NON-NLS-1$
" Extent: " + extent, Trace.REQUEST); //$NON-NLS-1$
// Let's get the first tile which covers the upper-left corner
WMTTile firstTile = tileFactory.getTileFromCoordinate(
extent.getMaxY(), extent.getMinX(), zoomLevel, this);
tileList.put(firstTile.getId(), addTileToList(firstTile));
WMTTile firstTileOfRow = null;
WMTTile movingTile = firstTileOfRow = firstTile;