World Navigation Charts
Collection: World
Map Service Name: World_Navigation_Charts
Description: This map presents a digital version of the Operational Navigation Charts (ONC) at 1:1,000,000-scale, produced by the US National Geospatial-Intelligence Agency (NGA). The map includes over 200 charts across the world, excluding parts of North America, Europe, Asia, and Oceania where charts are not publicly available.
Attribution: Copyright:© 2011 East View Cartographic
Coordinate System: WGS 1984 Web Mercator (Auxiliary Sphere)
Units of Measure: esriMeters
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
Map Service Data Format: Map server cache in JPEG format
Map Service Size: 8.79 GB
Map Service Size on Disk: 8.79 GB
Map Service Number of Files: 256
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