My company has all of our frames and files set up to use British National Grid as the projection. However, when adding in basemaps such as google imagery it becomes painfully slow and virtually unusable. After some tweaking I found that changing the data frames projection to "WGS_1984_Web_Mercator_Auxiliary_Sphere" this solves the slow loading issue, it all becomes super quick. My question is, what knock on effect will this have if I start creating shape files and maps to this new projection? Will shape files I make in this new projection still work on my old files that used British National Grid? Is there anything else I should know?
Having all your data in the same projection will drastically increase your maps performance. But the fact that ArcMap has to re-project some of your shapefiles from BNG to WebMercator is not a big deal.
Having all your data in the same projection will drastically increase your maps performance. But the fact that ArcMap has to re-project some of your shapefiles from BNG to WebMercator is not a big deal.
Thanks for the response, I am glad it will cause no other issue.
From now on I will project all of my data in Web Mercator instead of BNG then. It does make me wonder why the basemaps are slow with BNG compared to WebMercator though...
