Common attributes for maps using the Web Mercator Auxiliary Sphere tiling scheme

All Data Appliance for ArcGIS maps use the Web Mercator Auxiliary Sphere tiling scheme (WKID 102100), which is the same tiling scheme that ArcGIS Online, Google Maps, and Bing Maps use.

All Data Appliance for ArcGIS maps use the same coordinate system, map DPI, and tile size. Cached levels of detail for each map and layer match; however, not all maps and layers contain all levels of detail.

Coordinate system: WGS 1984 Web Mercator (Auxiliary Sphere)

Units of measure: esriMeters

Global extent:

  • XMin: -20037507.0671618
  • YMin: -19971868.8804086
  • XMax: 20037507.0671618
  • YMax: 19971868.8804086

Spatial reference: 102100 (3857)

Map DPI: 96

Tile size of map cache: 256 pixels by 256 pixels

Levels of detail: The number of cached levels of detail varies among maps. The scale levels are calculated based on the tile size (256 by 256) and the WGS 1984 Web Mercator Auxiliary Sphere coordinate system, such that when tiles are laid out starting at 180W and proceeding eastward, the final tile aligns perfectly (no overlap) with the first tile at the international date line.

The standard map scale and cell sizes are shown in the following table:

Layer level Map scale Cell size

L00

1:591,657,528

1 pixel = 1.40624 decimal degrees

(Meters at equator: 156,543.033928)

L01

1:295,828,764

1 pixel = 0.70312 decimal degrees

(Meters at equator: 78,271.516964)

L02

1:147,914,382

1 pixel = 0.35156 decimal degrees

(Meters at equator: 39,135.758482)

L03

1:73,957,191

1 pixel = 0.17578 decimal degrees

(Meters at equator: 19,567.879241)

L04

1:36,978,595

1 pixel = 0.08789 decimal degrees

(Meters at equator: 9,783.939620)

L05

1:18,489,298

1 pixel = 0.04395 decimal degrees

(Meters at equator: 4,891.969810)

L06

1:9,244,649

1 pixel = 0.02197 decimal degrees

(Meters at equator: 2,445.984905)

L07

1:4,622,324

1 pixel = 0.01099 decimal degrees

(Meters at equator: 1,222.992453)

L08

1:2,311,162

1 pixel = 0.00549 decimal degrees

(Meters at equator: 611.496226)

L09

1:1,155,581

1 pixel = 0.00275 decimal degrees

(Meters at equator: 305.748113)

L10

1:577,791

1 pixel = 0.00137 decimal degrees

(Meters at equator: 152.874057)

L11

1:288,895

1 pixel = 0.00069 decimal degrees

(Meters at equator: 76.437028)

L12

1:144,448

1 pixel = 0.00034 decimal degrees

(Meters at equator: 38.218514)

L13

1:72,224

1 pixel = 0.00017 decimal degrees

(Meters at equator: 19.109257)

L14

1:36,112

1 pixel = 0.00009 decimal degrees

(Meters at equator: 9.554629)

L15

1:18,056

1 pixel = 0.00004 decimal degrees

(Meters at equator: 4.777314)

L16

1:9,028

1 pixel = 0.00002 decimal degrees

(Meters at equator: 2.388657)

L17

1:4,514

1 pixel = 0.00001 decimal degrees

(Meters at equator: 1.194329)

L18

1:2,257

1 pixel = 0.000005 decimal degrees

(Meters at equator: 0.597164)

L19

1:1,128

1 pixel = 0.000003 decimal degrees

(Meters at equator: 0.298582)