General
Overwrite Database
- No (default) – If the writer attempts to write to an existing MBTiles file, the translation will be aborted.
- Yes – Any existing database is deleted before writing begins.
If no database exists when writing begins, a new database is created.
Zoom Levels
The required minimum zoom level at which a tileset will be generated.
The minimum supported value is 0. Note that specific tile files within the zoom level will only be generated if input geometries exist within those tiles.
Default: 0
Minimum supported value: 0
The required maximum zoom level at which a tileset will be generated.
The maximum supported value is 22. Note that specific tile files within the zoom level will only be generated if input geometries exist within those tiles.
Default: 5
Maximum supported value: 22
For more information about zoom levels, see Mapbox Documentation.
Metadata
Tileset Name
This defines the tileset name and sets the value of the name row in the metadata table. Defaults to the basename of the output file/folder.
Tileset Description
This parameter defines the tileset description and sets the value of the description row in the metadata table. This parameter is optional and defaults to an empty description.
Layer Type
The layer type. Sets the value of the type row in the metadata table.
- Overlay (default) – The tile data is an overlay map, so it can be placed on top of another map.
- Base Layer – The tile data is for a base layer map, so it cannot be placed on top of another map.
Advanced
Simplification Factor
Simplification factor for linear or polygonal geometries. The unit is the integer unit of tiles after quantification of geometry coordinates to tile coordinates.
Applies to all zoom levels, unless Simplification Factor Max Zoom Level is also defined.
Simplification Factor Max Zoom Level
Simplification factor for linear or polygonal geometries (which applies only to the maximum zoom level).
Specific Number of Threads
The number of threads for GDAL to use in its translation.
To set a specific number of threads, set this parameter to any positive whole integer value from 0-64.
If this parameter is left blank (which is the default), the default CPU number of threads will be used.
Tile Size
Number of Units per Tile
Number of units in a tile. A higher number of units results in more accurate geometry coordinates (at the expense of tile byte size).
Default: 4096
Number of Tile Buffer Units
Number of units for geometry buffering. This value corresponds to a buffer around each side of a tile into which geometries are fetched and clipped.
Default: 5 times the number of units per tile divided by 256. 80 when the number of units per tile is 4096.
Max Tile Size (bytes)
Maximum size of a tile in bytes (after compression).
If a tile is greater than this threshold, features will be written with reduced precision, or discarded and warnings will be logged.
Default: 500000
Max Features Per Tile
Maximum number of features per tile.
Default: 200000
Override Calculated Tile Bounds
By default, the bounds of the dataset is stored in the metadata table and is calculated automatically based on the bounds of the incoming vector feature geometries. This set of options allows overriding of those default bounds.
Minimum Tile Longitude
The optional minimum longitude coordinate for the dataset bounds.
Minimum Tile Latitude
The optional minimum latitude coordinate for the dataset bounds.
Maximum Tile Longitude
The optional maximum longitude coordinate for the dataset bounds.
Maximum Tile Latitude
The optional maximum latitude coordinate for the dataset bounds.
Override Calculated Tile Center
By default, the center of the dataset is stored in the metadata table and is calculated automatically based on the center of the bounds for the lowest zoom level.
Center Longitude
The optional longitude coordinate for the dataset center.
Center Latitude
The optional latitude coordinate for the dataset center.
Center Zoom Level
The zoom level for which the Center Longitude and Center Latitude Apply.