Module builders

Contains some recipes for creating complex OpenLayers objects. Currently only WMTS layers created from a Capabilities URL.

Index

Functions

Functions

createWmtsLayer

createWmtsLayer(url: string, config: Partial<Options>, urlMapper?: (urls: string[]) => string[]): Promise<TileLayer>

Trivial wrapper around createWmtsSource, creating a TileLayer based on the WMTS Source. See that function for a description of the parameters.

Parameters
- url: string
- config: Partial<Options>
- Optional urlMapper: (urls: string[]) => string[]
  - - (urls: string[]): string[]
    - Parameters
      - urls: string[]
      Returns string[]
Returns Promise<TileLayer>

createWmtsSource

createWmtsSource(capabilitiesUrl: string, config: Partial<Options>, urlMapper?: (urls: string[]) => string[]): Promise<WMTS>

Creates an OpenLayers WMTS source based on a capabilities URL. This is mostly boilerplate around a fetch and OpenLayers' own optionsFromCapabilities.

Parameters
- capabilitiesUrl: string
  
  The URL to the capabilities file
- config: Partial<Options>
  
  Any additional configuration we want when creating the source. Typically, this will be things like Matrix Set or format. See https://openlayers.org/en/latest/apidoc/module-ol_source_WMTS.html#.optionsFromCapabilities
- Optional urlMapper: (urls: string[]) => string[]
  
  A function converting the URL(s) reported by the capabilities to an array of other URLs. Typically, this can be used if the server uses a scheme of multiple subdomain aliases to work around the browser limitation on concurrent requests to the same domain, though this is less relevant in modern browsers.
  - - (urls: string[]): string[]
    - Parameters
      - urls: string[]
      Returns string[]
Returns Promise<WMTS>