Class Grid

网格类（本质是三维数组）:

三维数组的每一层代表一个波段
其中一层为一个二维数组，代表一个波段的值，并与对应的 MBR 对象关联用于挂接地图上的位置
MBR 统一使用 WGS84 坐标系

Hierarchy

Grid

Index

Constructors

Properties

MBR bands cols data rows shape

Accessors

bandCount height width

Methods

ConvertToGridMBR binarization fillInvalidValue getBand getBandStatistics getCoordByGridCoord getCoutourCode getGridCoord getMean getShape getSorted1DArray getSubGrid getSubGridObj

Constructors

constructor

new Grid(MBR, data): Grid
Parameters
- MBR: MBR
- data: number[][][]
Returns Grid
- Defined in src/coverage/grid.ts:20

Properties

MBR

MBR: MBR

bands

bands: number

cols

cols: number

data

data: number[][][]

rows

rows: number

shape

shape: number[]

Accessors

bandCount

get bandCount(): number
Returns number
- Defined in src/coverage/grid.ts:42

height

get height(): number
Returns number
- Defined in src/coverage/grid.ts:38

width

get width(): number
Returns number
- Defined in src/coverage/grid.ts:34

Methods

ConvertToGridMBR

ConvertToGridMBR(MBR): null | MBR
由外部经纬度坐标获取网格范围，行列号索引表示（只有全部在栅格范围内才会正常得到结果）
- 若外部坐标不全部在网格范围内，则返回 null
Parameters
- MBR: MBR
  
  网格行列号范围
Returns null | MBR
- Defined in src/coverage/grid.ts:142

binarization

binarization(band, threshold): number[][]
二值化网格数据，返回二值化后的网格数据
Parameters
- band: number
  
  波段号
- threshold: number
  
  二值化阈值
Returns number[][]
- Defined in src/coverage/grid.ts:241

fillInvalidValue

fillInvalidValue(band): void
在内部修改网格数据使用均值替换0等无效值
Parameters
- band: number
  
  波段号
Returns void
- Defined in src/coverage/grid.ts:81

getBand

getBand(band): number[][]
Parameters
- band: number
Returns number[][]
- Defined in src/coverage/grid.ts:30

getBandStatistics

getBandStatistics(band): {
    max: number;
    mean: number;
    min: number;
}
获取指定波段的最大值、最小值、平均值
Parameters
- band: number
  
  波段号
Returns {
    max: number;
    mean: number;
    min: number;
}
- max: number
- mean: number
- min: number
- Defined in src/coverage/grid.ts:207

getCoordByGridCoord

getCoordByGridCoord(GridCoord): [number, number]
由行列号反算经纬度坐标（栅格中心点）
Parameters
- GridCoord: [number, number]
  
  网格坐标，格式为：[row, col]
Returns [number, number]
- 返回经纬度坐标，格式为：[lon, lat]
- Defined in src/coverage/grid.ts:191

getCoutourCode

getCoutourCode(band, threshold, isPadding?): number[][]
Parameters
- band: number
- threshold: number
- Optional isPadding: boolean
Returns number[][]
- Defined in src/coverage/grid.ts:259

getGridCoord

getGridCoord(Point): null | [number, number]
计算输入点的网格坐标（整数行列号坐标）
Parameters
- Point: [number, number]
  
  输入点坐标，格式为：[lon, lat]
Returns null | [number, number]
- 返回网格坐标，格式为：[row, col] 若输入点不在网格范围内，则返回 null
- Defined in src/coverage/grid.ts:168

getMean

getMean(band): number
Parameters
- band: number
Returns number
- Defined in src/coverage/grid.ts:296

getShape

getShape(): number[]
Returns number[]
- Defined in src/coverage/grid.ts:26

getSorted1DArray

getSorted1DArray(band): number[]
Parameters
- band: number
Returns number[]
- Defined in src/coverage/grid.ts:307

getSubGrid

getSubGrid(GridMBR, band?): number[][][]
获取指定范围，指定波段的网格数据
- 建议：先使用 ConvertToGridMBR 方法获取网格范围，再使用本方法获取网格数据（为简化代码，没有将这两个方法合并）
Parameters
- GridMBR: MBR
  
  网格范围行列号索引表示
- band: number[] = ...
  
  波段号数组
Returns number[][][]
- 返回网格数据，格式为：[band][row][col]
- Defined in src/coverage/grid.ts:53

getSubGridObj

getSubGridObj(GridMBR, band?): Grid
与 getSubGrid 方法类似，但返回的是一个 Grid 对象
Parameters
- GridMBR: MBR
  
  网格范围行列号索引表示
- band: number[] = ...
  
  波段号数组
Returns Grid
- 返回网格数据，格式为：[band][row][col]
- Defined in src/coverage/grid.ts:115

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