![]() ![]() 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. I will update the worksheet later.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. I did not include a WRITEEXCEL formula to post the results back to the spreadsheet, because I just discovered this omission and want to get this uploaded before I go home for the evening. zip file is used in the worksheet to read in data. For users of other versions of Mathcad, the. This worksheet is in Mathcad Prime 3.0 format. Army Technical Manual TM 5-241-8 (complete citations below). Geological Survey Professional Paper 1395 and U. The two basic references for converting UTM and geographic coordinates are U.S. This worksheet provides two data entry methods: internal tables and external Excel spreadsheets. grids in some areas are wildly tilted with respect to latitude and longitude. The ellipsoid data in this worksheet is for World Geodetic System 1984 (WGS 84), which is very close to North American Datum 1983 (NAD 83). Results are accurate to about one millimeter within 3,000 km of a UTM Zone's central meridian. These two programs and the preliminary calculations for them use a truncated version of the Transverse Mercator flattening series derived by Johann Heinrich Louis Krüger in 1912. This worksheet provides separate program functions to convert Lat/Lon coordinates to UTM and UTM coordinates to Lat/Lon. The purpose of this worksheet is to convert geographic coordinates between latitude/longitude (Lat/Lon) and Universal Transverse Mercator (UTM). ![]()
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