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28.1.26. Vector Tiles

28.1.26.1. Download vector tiles 

NEW in 3.32

Downloads vector tiles of an input vector tile layer and saves them in a local vector tile file.

标注	名称	类型	描述
输入图层	`INPUT`	[vector tiles]	A vector tile layer to extract some tiles from
Extent	`EXTENT`	[范围]	Specify the spatial extent of the downloaded area. It will internally be extended to a multiple of the tile size. Available methods are: Calculate from layer…: uses extent of a layer loaded in the current project Calculate from layout map…: uses extent of a layout map item in the active project Calculate from bookmark…: uses extent of a saved bookmark Use map canvas extent Draw on canvas: click and drag a rectangle delimiting the area to take into account Enter the coordinates as `xmin, xmax, ymin, ymax`
Maximum zoom level to download	`MAX_ZOOM`	[数字] Default: 10	Defines how far to zoom in and fetch data from the tiles
Tile limit	`TILE_LIMIT`	[数字] Default: 100	Maximum number of tiles to download, considering the zoom levels and the extent.
Output	`OUTPUT`	[vector tiles] Default: [Save to temporary file]	Specification of the output vector tile file. One of: 保存到临时文件保存到文件…

标注	名称	类型	描述
Output	`OUTPUT`	[vector tiles]	A local vector tile file storing the downloaded tiles.

Algorithm ID: native:downloadvectortiles

import processing
processing.run("algorithm_id", {parameter_dictionary})

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

Exports one or more vector layers to vector tiles, a data format optimized for fast map rendering and small data size.

MBTiles is a specification for storing tiled map data in SQLite databases for immediate usage and for transfer. MBTiles files are known as tilesets.

标注	名称	类型	描述
Input layers	`INPUT`	[vector: any] [list]	A list of layers to combine to generate the vector tiles
Minimum zoom level	`MIN_ZOOM`	[数字] Default: 0	The lowest zoom level for which the tileset provides data. Set between 0 and 24.
Maximum zoom level	`MAX_ZOOM`	[数字] Default: 3	The highest zoom level for which the tileset provides data. Set between 0 and 24.
Extent 可选	`EXTENT`	[范围] Default: Not set	The maximum extent of the rendered map area. Bounds must define an area covered by all zoom levels.
Metadata: Name 可选	`META_NAME`	[string]	Name of the tileset
Metadata: Description 可选	`META_DESCRIPTION`	[string]	A description of the tileset's contents
Metadata: Attribution 可选	`META_ATTRIBUTION`	[string]	An attribution string, which explains the sources of data and/or style for the map.
Metadata: Version 可选	`META_VERSION`	[string]	The version of the tileset. This refers to a revision of the tileset itself, not of the MBTiles specification.
Metadata: Type 可选	`META_TYPE`	[string]	Type of tileset. Possible values are `overlay` or `baselayer`.
Metadata: Center 可选	`META_CENTER`	[string]	The center (string of comma-separated numbers: the longitude, latitude, and zoom level) of the default view of the map. Example: `-122.1906,37.7599,11`
Destination MBTiles	`OUTPUT`	[vector tiles] Default: [Save to temporary file]	Specification of the output MBTiles file. One of: 保存到临时文件保存到文件…

标注	名称	类型	描述
Destination MBTiles	`OUTPUT`	[file]	Output vector tiles `.mbtiles` file.

Algorithm ID: native:writevectortiles_mbtiles

import processing
processing.run("algorithm_id", {parameter_dictionary})

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。

Exports one or more vector layers to vector tiles, a data format optimized for fast map rendering and small data size.

标注	名称	类型	描述
File template	`XYZ_TEMPLATE`	[string] Default: '{z}/{x}/{y}.pbf'	Template to generate the vector tiles url
Input layers	`INPUT`	[vector: any] [list]	A list of layers to combine to generate the vector tiles
Minimum zoom level	`MIN_ZOOM`	[数字] Default: 0	The lowest zoom level for which the tileset provides data. Set between 0 and 24.
Maximum zoom level	`MAX_ZOOM`	[数字] Default: 3	The highest zoom level for which the tileset provides data. Set between 0 and 24.
Extent 可选	`EXTENT`	[范围] Default: Not set	The maximum extent of the rendered map area. Bounds must define an area covered by all zoom levels.
Output directory	`OUTPUT_DIRECTORY`	[folder] Default: [Save to temporary folder]	Specification of the output vector tiles folder. One of: Save to a Temporary Directory Save to Directory

标注	名称	类型	描述
Output directory	`OUTPUT_DIRECTORY`	[folder]	A folder containing different subsets of the vector tiles files (`.pbf`) stored in subfolders corresponding to the zoom levels.

Algorithm ID: native:writevectortiles_xyz

import processing
processing.run("algorithm_id", {parameter_dictionary})

当你在数据处理工具箱某个算法前悬停时，算法 id 将会展现。*参数字*将会提供参数的名称与数值。参考详见`数据处理_控制台`以获取如何从Python控制台中运行数据处理算法。