Package cn.mapway.common.geo.tools

Class WGS84TileExtractor

java.lang.Object

cn.mapway.common.geo.tools.BaseTileExtractor

cn.mapway.common.geo.tools.WGS84TileExtractor

All Implemented Interfaces:

ITileExtractor

Direct Known Subclasses:

CGCS2000TileExtractor

public class WGS84TileExtractor
extends BaseTileExtractor
implements ITileExtractor

WGS84TileExtractor 将原始影像 坐标参考系为地理坐标系 WGS84的影像中 提取出按照WebMecator规定的瓦片数据

// 1.找到左上角瓦片编号 某个级别 的像素数以及图像的像素数 找瓦片 // 2.顺序进行瓦片输出 将原始影像拷贝到目标瓦片 写入.S文件

//先创建一个目标文件 512*512 这个文件在内存中 (每个波段都以byte存储的数据) 这个文件的波段数和原始影像保持一枝 // GDAL中的影像坐标为 左上角为 (0,0)

Author:

zhangjianshe <zhangjianshe@gmail.com>

Constructor Summary

Constructors

Constructor	Description
WGS84TileExtractor()

Method Summary

Modifier and Type	Method	Description
boolean	extractTileToTarget(cn.mapway.geo.client.raster.ImageInfo imageInfo, long tileX, long tileY, int zoom, org.gdal.gdal.Dataset sourceDataset, org.gdal.gdal.Dataset targetDataset)	从原始影像中提取一个Tile

Methods inherited from class cn.mapway.common.geo.tools.BaseTileExtractor

getBand, getBlackBuffer, getSourceBuffer, getTargetBuffer, imageSpaceToSourceSpace, locationBoxPixelExtent, locationBoxPixelExtentFromWgs84, main, preview, processBands, rasterSpaceToImageSpace, readAndTranslateToBytes256, readImageBandSourceData, readSourceDataNoTranslate, setColorTable, translateColor

Methods inherited from class java.lang.Object

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

Constructor Details

WGS84TileExtractor

public WGS84TileExtractor()

Method Details

extractTileToTarget

public boolean extractTileToTarget(cn.mapway.geo.client.raster.ImageInfo imageInfo,
 long tileX,
 long tileY,
 int zoom,
 org.gdal.gdal.Dataset sourceDataset,
 org.gdal.gdal.Dataset targetDataset)

Description copied from interface: ITileExtractor

从原始影像中提取一个Tile

Specified by:

extractTileToTarget in interface ITileExtractor