What coordinate system is this?

161
2
05-28-2020 12:49 AM
LydiaLi
New Contributor

I am using 5 data points on Landsat 8 data.

The below two sets of coordinates should be of approximate location (may be off by couple pixels).

What transformation have set 1 undergone? What is the type of coordinate system is used for set 2?

Set 1:

x (lat, east)       y (long, south)
(145.1799927, -38.36000062)
(145.318279, -37.921044)
(145.215016, -37.586101)
(144.5475, -37.79712)
(144.4779, -37.96826)

Set 2:

coor = [(340443.027, -4247447.377),
(352251.003, -4198485.453),
(342211.378, -4161631.039),
(284062.888, -4186258.452),
(278580.779, -4205760.404)]

0 Kudos
2 Replies
DanPatterson
MVP Esteemed Contributor

start with the obvious projections that are used for your area and standard ones like UTM, Web Mercator and any national grids


... sort of retired...
0 Kudos
BRHolmes
New Contributor II

Lydia,

I do not know the answer for Set 1.  As for Set 2, I apologize if you already know this, but the coordinates listed are UTM coordinates, easting (x-coord) first, then northing (y-coord).  I believe that the northing coordinate is negative because the locations are in the southern hemisphere:

https://www.usgs.gov/faqs/why-do-landsat-scenes-southern-hemisphere-display-negative-utm-values?qt-n... 

Unfortunately, this doesn't help much (at least for me) with the datum of the coordinate system for Set 2.

0 Kudos