Santiam Pass Ski Patrol

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UTM Grid Zones of the World

Retrieved 9 Oct 2020 from http://www.dmap.co.uk/utmworld.htm, compiled by Alan Morton

Where am I? Universal Transverse Mercator is a way to answer this question in meters from a nearby meridian.

In the UK: Along the corridor and up the stairs. Easting before Northing.

In the US: Read right, then up.

UTM Grids in the Santiam Pass region

Grid lines in the Oregon Santiam Pass region

Link to pdf

Living on the Edge in 24k

Headed into the rising sun in Eastern Oregon just past the Big Summit Prairie… Zones collide! Its all a matter of perception, uh…I mean projection.

10T and 11T boundary 24,000 scale. CalTopo 9 Oct 2020. Link to pdf

Living on the Edge in 100k

10T and 11T boundary 100,000 scale. CalTopo 9 Oct 2020. Link to pdf

On the web

https://upload.wikimedia.org/wikipedia/commons/b/b7/Universal_Transverse_Mercator_zones.svg – image of the UTM system

http://geokov.com/education/utm.aspx

On Wikipedia

https://gisgeography.com/utm-universal-transverse-mercator-projection/

https://www.maptools.com/tutorials/utm/quick_guide

Math and programming – some serious math ahead!

https://www.movable-type.co.uk/scripts/geodesy-library.html

https://github.com/chrisveness/geodesy/blob/master/latlon-ellipsoidal-datum.js

https://arxiv.org/pdf/1002.1417.pdf

https://www.movable-type.co.uk/scripts/latlong-utm-mgrs.html

Conversion

https://www.ngs.noaa.gov/NCAT/

USNG – US National Grid

https://www.maptools.com/tutorials/usng/quick_guide