What is UTM and WGS84?
What is UTM and WGS84?
WGS84 allows you to have a datum in the full meaning of the term, and this is projected using the map projection. UTM is a map projection system: Universal Transverse Mercator. WGS is a datum and ellipsoid that model the Earth. In GIS, specifying WGS84 as the datum means you can use GPS data directly.
Are there 120 UTM zones?
UTM zones are six degrees wide. Each zone exists in a North and South variant. Universal Transverse Mercator Zone n (N) – The Northern Hemisphere projections for the infamous UTM system consisting of 120 zones (60 different zones with North and South variants of each).
How do I know my UTM zone?
Calculating the Boundaries of a UTM Zone
- UTM zones are all 6 degrees wide and increase from west to east starting at the -180 degree mark.
- Calculate the eastern boundary of any UTM zone by multiplying the zone number by 6 and subtracting 180.
- Subtract 6 degrees to obtain the western boundary.
Where is WGS 84?
The coordinate origin of WGS 84 is meant to be located at the Earth’s center of mass; the uncertainty is believed to be less than 2 cm. The WGS 84 meridian of zero longitude is the IERS Reference Meridian, 5.3 arc seconds or 102 metres (335 ft) east of the Greenwich meridian at the latitude of the Royal Observatory.
Is WGS a datum?
Horizontal datums precisely specify each location on Earth’s surface in latitude and longitude or other coordinate systems. For instance, NAD27, NAD83, and WGS84 are examples of geodetic datums.
What UTM zone is the UK?
There isn’t a single UTM zone that neatly spans the UK from Belleek (8° 5′ W, Zone 29) to Lowestoft (1° 45′ E, Zone 31). Using unprojected WGS 84 kinda smears the islands out a bit. Your choice very much depends on your scale, your audience and whether distance or area need to be kept accurate.
Where is WGS84?
What is an example of the WGS84 coordinate system?
For example: 1 Leuven, Belgium is located on 50°52’47” North and 4°42’01” East in the WGS84 coordinated system 2 San Antonio, United States is located on 29°25’26” North and 98°29’37” West in the WGS 84 coordinate system More
What’s the difference between wgs84/utm zone 32N and GPS zone 32N?
Coming back to the introduction: What’s the difference then between “WGS84/UTM zone 32N” and “GPS uses WGS84″. This actually means that the position on the earth is in both cases establised in WGS84 coordinate system (50°52’47” North and 4°42’01”). But in the first case that number is further projected to the UTM projection system.
What is the latest version of WGS 84?
The latest revision is WGS 84 (also known as WGS 1984, EPSG:4326 ), established in 1984 and last revised in 2004. Earlier schemes included WGS 72, WGS 66, and WGS 60. WGS 84 is the reference coordinate system used by the Global Positioning System .
What is the surface area of WGS 84?
The WGS 84 datum surface is an oblate spheroid with equatorial radius a = 6 378 137 m at the equator and flattening f = 1/ 298.257 223 563. The refined value of the WGS 84 gravitational constant (mass of Earth’s atmosphere included) is GM = 3 986 004.418 × 108 m3/s2. The angular velocity of the Earth is defined to be ω = 72.921 15 × 10−6 rad/s.
