Hi Mike, When initially choosing a layer, the check-box for basemap is automatically checked and greyed out. When trying to add additional layers to my chosen basemap, the error previously mentioned occurs. Unfortunately I cannot share the URL with you, but if you would like any additional information with regard to the WMTS being used I'll be more than happy to provide you information where I can. Could the issue be due to the tile matrix sizes of the layers not matching? Some layers contain multiple scales, and where the tile matrix size is not a multiple of 2 (twice as large, or twice as small), the map alignment is thrown off. E.g. One layer goes from: Scale Denominator: 1785714.285714 Tile Size: 200,200 Tile Matrix Size: 7,13 To: Scale Denominator: 714285.714286 Tile Size: 200,200 Tile Matrix Size: 18,33 And even though they use the same coordinate system, the layers do not align.Thanks for looking at this.
... View more