Have had a map to do for a client of ours—one of those great jobs where they need it done the same day and as they are a good client of one of our software products I agreed. To top it off the client asked for A4 300ppi and when I supplied and spoke to the designer doing the layout (who I asked to contact me at the start) I found out it was going on a metre wide banner and vector would be fine.
Anyway he was asking for distances to cities which they could put into a table next to the map and I suggested instead I put lines on the map showing these distances from New Zealand. Interested to see if I went about this the correct way.
What I did was created a world map in Azimuthal Equidistant centred roughly on the centre of New Zealand. I then ran buffers out every 1000km to the edge of the projection. This I figured would give accurate distances from New Zealand.
These lines were then densified an projected back to a more useful world projection for the rest of the compilation and labelling. Mollweide on 180 as the company is called Globe Holdings Limited and Mollweide has more of a 'globe-like' view than the Robinson projection sample they showed me to start with.
If there was more time I would of liked to put major cities on with distances to them to give soem more context but I think this works for what they are doing—def nicer than the sample they showed me and asked me a higher res version of.
Does that look like the correct way to go about setting up these type of distance lines to get reasonably accurate distances from a given point? If I had of done the buffer from another projection am I correct in assuming the projection distortions would of messed with the distances? The job has gone so I hope what I thought was going on here was correct and if not that no one notices.