Class QuadTile

A Tile is, essentially, code to create an Arrow RecordBatch and to associate metadata with it, in the context of a larger dataset.

Hierarchy

Constructors

constructor

Properties

__schema? _already_called _batch? _buffer_manager? _children _download? _extent? _highest_known_ix? _max_ix? _min_ix? child_locations codes dataset download_state key max_ix numeric_id parent promise ready url

Accessors

_schema children extent highest_known_ix macro_siblings macrotile min_ix record_batch root_extent theoretical_extent

Methods

[iterator] add_column apply_transformation delete_column_if_exists download download_to_depth extend_promise forEach get_arrow get_column is_visible points schema yielder

Constructors

constructor

Properties

Optional __schema

__schema?: schema_entry[]

_already_called

_already_called: boolean = false

Optional _batch

_batch?: RecordBatch<any>

Optional _buffer_manager

_buffer_manager?: TileBufferManager<QuadTile>

_children

_children: QuadTile[] = []

Optional _download

_download?: Promise<void>

Optional _extent

_extent?: {
    x: MinMax;
    y: MinMax;
}

Type declaration

  • x: MinMax
  • y: MinMax

Optional _highest_known_ix

_highest_known_ix?: number

Optional _max_ix

_max_ix?: number

Optional _min_ix

_min_ix?: number

child_locations

child_locations: string[] = []

codes

codes: [number, number, number]

dataset

dataset: Dataset<Tile>

download_state

download_state: string

key

key: string

max_ix

max_ix: number = -1

numeric_id

numeric_id: number

parent

parent: QuadTile

promise

promise: Promise<void>

ready

ready: boolean

url

url: string

Accessors

Protected _schema

  • get _schema(): number[] | schema_entry[]

  • Returns number[] | schema_entry[]

children

  • get children(): this[]

  • Returns this[]

extent

highest_known_ix

  • get highest_known_ix(): number

  • Returns number

  • set highest_known_ix(val: number): void

  • Parameters

    • val: number

    Returns void

macro_siblings

  • get macro_siblings(): string[]

  • Returns string[]

macrotile

  • get macrotile(): string

  • Sometimes it's useful to do operations on batches of tiles. This function defines a grouping of tiles in the same general region to be operated on. In general they will have about 80 elements (16 + 64), but the top level has just 5. (4 + 1). Note a macro tile with the name [2/0/0] does not actually include the tile [2/0/0] itself, but rather the tiles [4/0/0], [4/1/0], [4/0/1], [4/1/1], [5/0/0] etc.

    Returns string

min_ix

  • get min_ix(): number

  • Returns number

record_batch

  • get record_batch(): RecordBatch<any>

  • Returns RecordBatch<any>

root_extent

theoretical_extent

Methods

[iterator]

  • [iterator](): IterableIterator<StructRowProxy<any>>

  • Returns IterableIterator<StructRowProxy<any>>

add_column

  • Parameters

    • name: string
    • data: Float32Array

    Returns RecordBatch<any>

apply_transformation

delete_column_if_exists

download

download_to_depth

  • Parameters

    • max_ix: number

    Returns Promise<void>

extend_promise

  • Returns

    A promise that includes the callback and all previous promises.

    Parameters

    • callback: (() => Promise<void>)

      A function (possibly async) to execute before this cell is ready.

        • (): Promise<void>

        • Returns Promise<void>

    Returns Promise<void>

forEach

  • Parameters

    • callback: ((p: StructRowProxy<any>) => void)
        • (p: StructRowProxy<any>): void

        • Parameters

          • p: StructRowProxy<any>

          Returns void

    Returns void

get_arrow

  • Parameters

    • suffix: string = undefined

    Returns Promise<RecordBatch<any>>

get_column

  • Parameters

    • colname: string

    Returns Promise<Vector<any>>

is_visible

points

  • Parameters

    Returns Iterable<StructRowProxy<any>>

schema

  • Returns Promise<number[] | schema_entry[]>

yielder

  • Returns Generator<StructRowProxy<any>, void, unknown>

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