![]() Major Water Regions (MJWTR)Coordinate system: 4326 - "WGS 84" Abstract:Major Water Regions represent waterbodies with a heritage significance, or surface area greater than 100sqkm. Major Water is engineered from a combination of National Topographic Data Base (NTDB) 1:50,000 and 1:250,000 scale hydrographic mapping data. Note: In 2012, there was a datum change from NAD83 to WGS84. |