类 MvtBuilder
- java.lang.Object
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- org.wowtools.giscat.vector.mvt.MvtBuilder
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public class MvtBuilder extends Object
mvt瓦片构造器- 作者:
- liuyu
- createdate
- 2022/4/24
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构造器概要
构造器 构造器 说明 MvtBuilder(byte z, int x, int y, int extent, int clipBuffer, @NotNull org.locationtech.jts.geom.GeometryFactory geometryFactory)Create with the given extent value.MvtBuilder(byte z, int x, int y, @NotNull org.locationtech.jts.geom.GeometryFactory geometryFactory)
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方法概要
所有方法 实例方法 具体方法 修饰符和类型 方法 说明 MvtLayercreateLayer(String layerName)新建一个图层,不对geometry进行简化MvtLayercreateLayer(String layerName, int simplifyDistance)新建一个图层,按simplifyDistance的值简化geometryBboxgetBbox()@NotNull MvtLayergetOrCreateLayer(String layerName)新建或获取一个图层,不对geometry进行简化@NotNull MvtLayergetOrCreateLayer(String layerName, int simplifyDistance)新建或获取一个图层,按simplifyDistance的值简化geometrybyte[]toBytes()转为 bytes
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字段详细资料
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extent
protected final int extent
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tileClip
@NotNull protected final @NotNull TileClip tileClip
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构造器详细资料
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MvtBuilder
public MvtBuilder(byte z, int x, int y, @NotNull @NotNull org.locationtech.jts.geom.GeometryFactory geometryFactory)
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MvtBuilder
public MvtBuilder(byte z, int x, int y, int extent, int clipBuffer, @NotNull @NotNull org.locationtech.jts.geom.GeometryFactory geometryFactory)Create with the given extent value.The extent value control how detailed the coordinates are encoded in the vector tile. 4096 is a good default, 256 can be used to reduce density.
The clip buffer value control how large the clipping area is outside of the tile for geometries. 0 means that the clipping is done at the tile border. 8 is a good default.
- 参数:
extent- a int with extent value. 4096 is a good value.clipBuffer- a int with clip buffer size for geometries. 8 is a good value.
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方法详细资料
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createLayer
public MvtLayer createLayer(String layerName, int simplifyDistance)
新建一个图层,按simplifyDistance的值简化geometry- 参数:
layerName- 图层名 本方法没有对图层名进行唯一校验,故若图层已存在,则原图层会被覆盖simplifyDistance- 对geometry进行简化的长度,单位是瓦片像素,取值范围[0,extent+clipBuffer],为0时表示不做简化- 返回:
- MvtLayer
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createLayer
public MvtLayer createLayer(String layerName)
新建一个图层,不对geometry进行简化- 参数:
layerName- 图层名 本方法没有对图层名进行唯一校验,故若图层已存在,则原图层会被覆盖- 返回:
- MvtLayer
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getOrCreateLayer
@NotNull public @NotNull MvtLayer getOrCreateLayer(String layerName, int simplifyDistance)
新建或获取一个图层,按simplifyDistance的值简化geometry- 参数:
layerName- 图层名simplifyDistance- 对geometry进行简化的长度,单位是瓦片像素,取值范围[0,extent+clipBuffer],为0时表示不做简化- 返回:
- 若已有同名图层则返回现有图层,否则新建一个
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getOrCreateLayer
@NotNull public @NotNull MvtLayer getOrCreateLayer(String layerName)
新建或获取一个图层,不对geometry进行简化- 参数:
layerName- 图层名- 返回:
- 若已有同名图层则返回现有图层,否则新建一个
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getBbox
public Bbox getBbox()
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toBytes
public byte[] toBytes()
转为 bytes- 返回:
- bytes
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