United States National Grid (USNG and USNG 16).World Geographic Reference System (GEOREF and GEOREF 16).The default is GCS_WGS_1984 unless the input table is a feature class, in which case the default is the coordinate system of the input features. (Latitude) values is specified with the Input Coordinate System parameter. Sf::st_transform(crs = "+proj=utm +zone=34 +datum=WGS84 +units=m +no_defs")ībox: xmin: 30955.23 ymin: 5568668 xmax: 30955.23 ymax: 5568668ĬRS: +proj=utm +zone=34 +datum=WGS84 +units=m +no_defsġ Statue of Winston Churchill POINT (30955.The coordinate system of the values stored in the X Field Sir_winston 767×727 132 KB # project sir winston to UTM zone 33 # double check: draw a point on map (yup, it is him!)ĪddCircleMarkers(stroke = F, fillOpacity = 1) # input data - your excel should look like this Note that the code will work (coordinates are projected) in both cases = it is necessary to have some idea what is your UTM zone of interest. Note that it is technically possible to project a point to more zones than one - in my toy example I project sir Winston both to zone 33 (which is the appropriate zone for Prague) and to zone 34 (which is not). To project to a UTM zone coordinates it is easiest to specify projection via a PROJ4 string of a sf::st_transform() call. Note that at this point your coordinates should be good for most point mapping use cases - see the leaflet printscreen I used to double check (I am terrible at remembering the order of latitude and longitude I swap them all of the time and need to check often). The first step is convert your regular data frame to a spatial structure: for this use sf::st_transform(), if your data is in lat / lon specify as CRS 4326 (this is the EPSG code for WGS84). ![]() ![]() I am using a toy example of plotting the location of statue of Sir Winston Churchill in front of the Prague School of Economics. This is an unusual use case latitude and longitude is in most cases enough to draw on a map, and when you convert to an UTM zone coordinates you usually have a specific zone in mind.
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