![]() ![]() ![]() Geom_label(data = test_df, aes(lon, lat, label = Location), colour = 'red', fontface = 'bold', hjust = 0, vjust = -0. For more details see the GDA2020 Technical Manual. The GRS80 ellipsoid must be selected to use MGA2020, and calculations are only valid within the Geodetic Datum of Australia 2020 extent. Geom_point(data = test_df, aes(lon, lat), colour = 'red', size = 2) + Map Grid of Australia 2020 (MGA2020) is a UTM projection. Ggmap(get_map(map_center, zoom = 11, source = 'osm', maptype = 'terrain'), darken = c(0.3, 'black'), extent = 'device') + Summarise(lon = mean(lon), lat = mean(lat)) General formulas are available on Wikipedia library(dplyr) Convert UTM to Geographic (latitude, longitude) AWSM Tools UTM to latitude longitude See also to convert coordinates backwards: Latitude longitude to UTM Universal Transverse Mercator (UTM) UTM is conformal projection uses a 2-dimensional Cartesian coordinate system to give locations on the surface of the Earth. Note that the UTM2deg works well for Australia but does not work everywhere in the world. Plotting is done using the ggmap package. ![]() cs2cs will then accept coordinates on standard input, and. To find the EPSG code for your coordinate system of interest look on, for example see the page for UTM zone 35n. First input the easting and northings for the two water quality stations on Merri Creek, convert to Lat and Lon and then plot. You can specify the coordinate system to convert to in from in multiple format, but epsg codes are convenient. I’m interested in plotting points in Australia so have used the GRS80 ellipsoid which is used for the Geocentric Datum of Australia (GDA94). A direct link to the spreadsheet is here.īased on the spreadsheet, I’ve developed an R function UTM2deg to convert UTM coordinates to latitudes and longitudes (available via this gist). For example, Geoscience Australia provides a web-app here and also a spreadsheet as linked from this page. There are programs and on-line tools available for this. Often coordinates for water quality sites are provided in eastings and northings and it’s useful to convert to latitude and longitude. ![]()
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