Logitude

[Ardista]

What is the significance of 45°W in Meteorology? Or is there any significance at all. This is a question about numerical weather prediction. In particular weather forecast/prediction maps. I've noticed on some there is a demarcation at this point on some maps. The imaginary line cuts down the center of Greenland. It is possible it's just for calculation on the GIS. I wondered if anybody had a definitive answer. The map is flat for display purposes not spherical.

[Yarmy]

5 minutes ago, Ardista said:

What is the significance of 45°W in Meteorology? Or is there any significance at all. This is a question about numerical weather prediction. In particular weather forecast/prediction maps. I've noticed on some there is a demarcation at this point on some maps. The imaginary line cuts down the center of Greenland. It is possible it's just for calculation on the GIS. I wondered if anybody had a definitive answer. The map is flat for display purposes not spherical.

It's half of 90°, that's all.

[Mokidugway]

Meridian markers I would have thought .

[Ardista]

Probably.

Map anomaly.

Cheers for reply.