nl_tokens: Provides cell IDs of nearby cells based on the given coords and radius
pl_tokens: function ( lat , lng , radius , level ) { if ( typeof radius === 'undefined' ) radius = 3 ; if ( typeof level === 'undefined' ) level = 15 ; /* eslint-disable new-cap */ var origin = s2 . S2Cell . FromLatLng ( { lat : lat , lng : lng } , level ) ; var cells = [ ] ; cells . push ( origin . toHilbertQuadkey ( ) ) ; // middle block for ( var i = 1 ; i < radius ; i ++ ) { // cross in middle cells . push ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] , origin . ij [ 1 ] - i ] , origin . level ) . toHilbertQuadkey ( ) ) ; cells . push ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] , origin . ij [ 1 ] + i ] , origin . level ) . toHilbertQuadkey ( ) ) ; cells . push ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] - i , origin . ij [ 1 ] ] , origin . level ) . toHilbertQuadkey ( ) ) ; cells . push ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] + i , origin . ij [ 1 ] ] , origin . level ) . toHilbertQuadkey ( ) ) ; for ( var j = 1 ; j < radius ; j ++ ) { cells . push ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] - j , origin . ij [ 1 ] - i ] , origin . level ) . toHilbertQuadkey ( ) ) ; cells . <mask> ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] + j , origin . ij [ 1 ] - i ] , origin . level ) . toHilbertQuadkey ( ) ) ; cells . push ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] - j , origin . ij [ 1 ] + i ] , origin . level ) . toHilbertQuadkey ( ) ) ; cells . push ( s2 . S2Cell . FromFaceIJ ( origin . face , [ origin . ij [ 0 ] + j , origin . ij [ 1 ] + i ] , origin . level ) . toHilbertQuadkey ( ) ) ; } } /* eslint-enable new-cap */ return cells . map ( s2 . toId ) ; }