 The BNG SF and then if I wanted to do piping I can just name the original objects which is have the WGS 84 assigned to it and I just say ST transform and then I specify the CRS as British National Group sorry is yeah British National Group so I'll load it again to make sure I've actually done it so it's currently WGS 84 but if I do this that new object Burgary BNG SF will be projected with the British National Grid and then if I just print the contents of the object it actually tells you projected CRS British National Grid. So should we just rerun the plot or was it not? I can rerun the plot I think it should change the projection to something I'd expect to see. You can see the geometry column is different as well. Yeah that's a good point yeah so it's actually no longer lasting longitude and now the geometry comment has the risk. Isn't the plot though is it? Is that because you've set the... Yeah so interestingly like if I load the data and I tell it it's WGS 84 the map actually uses appears to be using eastings and northings right? Yeah the labels are not. I know sorry that is lasting longitude isn't it right? But if I if I re-project it to British National Grid I think it will still say westings and yeah it will I think by default it's still using latitude and longitude. So you have to tell it to project it in a different? Yeah so well this is a bit confusing. It's a label isn't it? You have to tell it to label it differently. Yeah re-assign the labels. Yeah that's a bit confusing actually because basically that map here that is projected with the British National Grid it's just by default labelling it with latitude and longitude. Which is a bit misleading but I know that you can change that that you would add another layer I'll look at what it is and you basically just say can you change the the labels to British National Grid? That's basically it and you can do it the other way around too. So just for people who weren't there Andy pointed out that when we when we re-project so for those who weren't there at all okay we load in the data as we tell R that the latitude and longitude coordinates are WGF84 with the 4326 and then when we plot that when we plot those points you'll notice that it looks correct because we've used the correct CRF and you'll notice that the axes on this map are latitude and longitude which makes sense of course because that's how we've projected it. Well that's the CRF that we're using but if we then we can then re-project the data which is completely fine that's something I didn't quite mention so it's important that you tell what CRF the data is you're using but once you've done that you can then re-project it to something else so this is Manchester so although the raw data is latitude and longitude coordinates once we've told it it's WGF84 we can then re-project it to the British National Grid which is probably what probably what you should be doing especially if you're conducting if you're going to be measuring distances or something like that so this bit of code here that I've highlighted we create a new object called burglary vngsf from that original object and we say ft transform CRF equals and then 27700 which is that you know that unique id but for the British National Grid so we run it's giving me a my laptop's being very slow today and it gives me this error sometimes but so we create a new object and that's now projected in the British National Grid and if we just run the object you know like print the object to the to the console you can see that it tells us that it's a projected CRF and it's in the British National Grid and as Julie pointed out it actually also changes the geometry coordinates so those coordinates are now no longer latitude and longitude these are British National Grid, Eastings and Northings coordinates but if we then plot those points that have been projected with the British National Grid it's still been slow but it will get there eventually you'll notice it looks correct because we've transformed it it's still correct it's British National Grid but the they actually they're actually still latitude and longitude they're still it still kind of looks like it might be in the 432 CRF which is a little bit misleading because it has been it's projected with the British National Grid but the axes imply that it's latitude and longitude and I imagine that's just some kind of default of ggplot to make it more sort of international or generic but I just I had to google it because I don't actually bother changing the axes too much but there's an additional line you can add so I use the plus sign and then I add quad underscore ff and then I basically state that I want the coordinates of the visual just the visuals specifically to be 27700 which is a British National Grid and if I run that then it changes the axes and this is now showing the Eastings and Northings which is British National Grid so again that's this that's a visual component there was nothing wrong with the map before the map before was correctly projected but the axes were latitude and longitude and so this is more like a maybe a depends on your audiences uh if you're an international audience you might want to stick with latitude and longitude coordinates but if it's specifically a British audience or uh you know people with a particular love for the British National Grid then maybe you want to specify that the axes should also be British National Grid um yeah