HoloMap.Source.Raster (HoloMap v0.1.0)

Raster tiles: aerial imagery, scanned maps, any pre-rendered tile pyramid.

<HoloMap.Source.Raster
  id="ortho"
  tiles={["https://tiles.example.com/ortho/{z}/{x}/{y}.png"]}
  tile_size={256}
  attribution="© Example Imagery"
/>
<HoloMap.Layer.Raster id="ortho-layer" source="ortho" paint={%{raster_opacity: 0.8}} />

tile_size matters more than it looks: 256 is the classic scheme, 512 matches the vector-tile grid. Getting it wrong does not error. It shifts the imagery half a zoom level out of alignment with everything else.

Props

Prop	Type	Notes
`id`	string	Required. Referenced by layers' `source` prop
`url`	string	TileJSON endpoint. Supply this or `tiles`
`tiles`	list	Tile URL templates containing `{z}`, `{x}`, `{y}`
`tile_size`	number	Pixel size of one tile, usually 256 or 512
`min_zoom` / `max_zoom`	number	Zoom range the tiles exist at
`bounds`	list	`[west, south, east, north]` extent of the imagery
`scheme`	string	`"xyz"` (default) or `"tms"`
`volatile`	boolean	Skip the tile cache
`attribution`	string	Attribution text

Summary

Functions

__is_hologram_component__()

Returns true to indicate that the callee module is a component module (has "use Hologram.Component" directive).

__props__()

Returns the list of property definitions for the compiled component.

Functions

__is_hologram_component__()

@spec __is_hologram_component__() :: boolean()

Returns true to indicate that the callee module is a component module (has "use Hologram.Component" directive).

Examples

iex> __is_hologram_component__()
true

props()

@spec __props__() :: [{atom(), atom(), keyword()}]

Returns the list of property definitions for the compiled component.