@quartic/bokehjs/src/coffee/models/tiles/bbox_tile_source.coffee

Interactive, novel data visualization

import {MercatorTileSource} from './mercator_tile_source'
import * as p from "core/properties"

export class BBoxTileSource extends MercatorTileSource
  type: 'BBoxTileSource'

  @define {
      use_latlon : [ p.Bool, false ]
    }

  get_image_url: (x, y, z) ->
    image_url = @string_lookup_replace(@url, @extra_url_vars)

    if @use_latlon
      [xmin, ymin, xmax, ymax] = @get_tile_geographic_bounds(x, y, z)
    else
      [xmin, ymin, xmax, ymax] = @get_tile_meter_bounds(x, y, z)

    return image_url.replace("{XMIN}", xmin).replace("{YMIN}", ymin).replace("{XMAX}", xmax).replace("{YMAX}", ymax)