Why Gray and Hybrid basemaps count for 2 layers?

EdgarCanul

When I begin my application with Street as basemap layer and two more feature layers, I have 3 layers in total

map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">getLayer</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">.</SPAN>size<SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

But when I change the basemap layer to Gray_base or Hybrid:

map<SPAN class="punctuation token">.</SPAN><SPAN class="token function">setMapOptions</SPAN><SPAN class="punctuation token">(</SPAN><SPAN class="keyword token">new</SPAN> <SPAN class="token class-name">MapOptions</SPAN><SPAN class="punctuation token">(</SPAN>MapType<SPAN class="punctuation token">.</SPAN>GRAY_BASE<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">;</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN></SPAN>

One more layer is added (4 after the change). If I change again to other basemap not being GRAY_BASE or HYBRID the extra layer is removed (having 3 as initially)

Why this happens? I think it's not an error in my code because even the sample code (the MapOptionsApp example) shows this behavior.

What can I do to avoid this extra layer?

Beforehand thanks a lot.

nita14

Hi Edgar,

This is because the selected basemap consists of two layers: Base (Background) and Reference (Labels). 

You can examine these using basemap item definition. 

Hope this clarifies your concern,

Regards,

Adam