regattagame.net

Attached is a screen shot. The latitude/longitude are those of the mouse which is near the scale ruler.
My understanding is that this scale is to give an indication of the width because the vertical and horizontal scales are different, vertical is always 60 nm / degree of lat

Here at latitude 34 N, it looks like a 1 degree of longitude is ~ 55 nm but at lat 34 a degree of longitude is exactly 49.7 nm which is less than 50, so the scale is misleading.

Yes !

A few years ago, the horizontal scale was ok / did change depending on the latitude.

Then ,after upgrading the maping software (openlayers), it failed.
We have to fix this.

Cells are 1° (or 0.5 or 0.25).

My suggestion is pick the mid latitude and make it 60 * cos(lat) long for the 1° cell. Then scale according to zoom level.

Is OpenLayer also the software giving problems with the loxodrome lengths? This one can be fixed easily by internally making the boat speeds about 1.048 times greater than shown on the polars, then boats will move as expected on the map. The lenghts are short by 4.6% but the bearings are spot on. Something VR was not always good at.

On the other hand I like the maps. LS maps left a lot to be desired, especially in the arctic circle where everything was various shades of grey and I could not tell what was snow and what was land. I lost a race because of that, the one who beat me dared going closer to the land, where I was sure he would run aground but he didn't

Here there is no doubt what is land and what isn't.