Web map zoom levels updated

By Aileen Buckley, Research Cartographer

Quite some time ago, I wrote a blog post about the zoom levels used for web maps. Since these have been expanded to include even larger scales, I am updating them here. There are now 23 levels that range from a global scale (zoom level 0 at about 1:591,000,000) to a local scale (zoom level 23 at about 1:70).

I don’t have time right now to update all of the info in the original post, but you should be aware that a lot of it needs to be updated! In the meantime, at least this info is now up to date! Hope this helps those of you who need this!

Scale is the RF 1:XX 

Levels of Detail: 24

• Level ID: 0
  • Resolution: 156543.03392800014
  • Scale: 5.91657527591555E8

• Level ID: 1
  • Resolution: 78271.51696399994
  • Scale: 2.95828763795777E8

• Level ID: 2
  • Resolution: 39135.75848200009
  • Scale: 1.47914381897889E8

• Level ID: 3
  • Resolution: 19567.87924099992
  • Scale: 7.3957190948944E7

• Level ID: 4
  • Resolution: 9783.93962049996
  • Scale: 3.6978595474472E7

• Level ID: 5
  • Resolution: 4891.96981024998
  • Scale: 1.8489297737236E7

• Level ID: 6
  • Resolution: 2445.98490512499
  • Scale: 9244648.868618

• Level ID: 7
  • Resolution: 1222.992452562495
  • Scale: 4622324.434309

• Level ID: 8
  • Resolution: 611.4962262813797
  • Scale: 2311162.217155

• Level ID: 9
  • Resolution: 305.74811314055756
  • Scale: 1155581.108577

• Level ID: 10
  • Resolution: 152.87405657041106
  • Scale: 577790.554289

• Level ID: 11
  • Resolution: 76.43702828507324
  • Scale: 288895.277144

• Level ID: 12
  • Resolution: 38.21851414253662
  • Scale: 144447.638572

• Level ID: 13
  • Resolution: 19.10925707126831
  • Scale: 72223.819286

• Level ID: 14
  • Resolution: 9.554628535634155
  • Scale: 36111.909643

• Level ID: 15
  • Resolution: 4.77731426794937
  • Scale: 18055.954822

• Level ID: 16
  • Resolution: 2.388657133974685
  • Scale: 9027.977411

• Level ID: 17
  • Resolution: 1.1943285668550503
  • Scale: 4513.988705

• Level ID: 18
  • Resolution: 0.5971642835598172
  • Scale: 2256.994353

• Level ID: 19
  • Resolution: 0.29858214164761665
  • Scale: 1128.497176

• Level ID: 20
  • Resolution: 0.14929107082380833
  • Scale: 564.248588

• Level ID: 21
  • Resolution: 0.07464553541190416
  • Scale: 282.124294

• Level ID: 22
  • Resolution: 0.03732276770595208
  • Scale: 141.062147

• Level ID: 23
  • Resolution: 0.01866138385297604
  • Scale: 70.5310735