USA Topographic Maps

Collection: World Imagery

Map Service Name: USA_Topo_Maps

Description: This map presents land-cover imagery for the world and detailed topographic maps for the United States. The map includes the National Park Service (NPS) Natural Earth physical map at 1.24km per pixel for the world at small scales, i-cubed eTOPO 1:250,000-scale maps for the contiguous United States at medium scales, and National Geographic TOPO! 1:100,000 and 1:24,000-scale maps (1:250,000 and 1:63,000 in Alaska) for the United States at large scales. The TOPO! maps are seamless, scanned images of United States Geological Survey (USGS) paper topographic maps.

Attribution: Copyright:© 2011 National Geographic Society, i-cubed

Coordinate System: WGS 1984 Web Mercator (Auxiliary Sphere)

Units of Measure: esriMeters

Extent:

• XMin: -20037507.2295943
• YMin: -19971868.8804086
• XMax: 20037507.2295943
• YMax: 19971868.8804086

Spatial Reference: 102100 (3857)

Map DPI: 96

Tile Size of Map Cache: 256 pixels by 256 pixels

Map Service Data Format: Map Server Cache in JPEG Format

Map Service Size: 297 GB

Map Service Size on Disk: 298 GB

Map Service Number of Files: 19,341

Cached Map Scales:

• 1:591,657,527.591555
• 1:295,828,763.795777
• 1:147,914,381.897889
• 1:73,957,190.948944
• 1:36,978,595.474472
• 1:18,489,297.737236
• 1:9,244,648.868618
• 1:4,622,324.434309
• 1:2,311,162.217155
• 1:1,155,581.108577
• 1:577,790.554289
• 1:288,895.277144
• 1:144,447.638572
• 1:72,223.819286
• 1:36,111.909643
• 1:18,055.954822