this post was submitted on 04 Sep 2026
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Mildly Interesting

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This is for strictly mildly interesting material. If it's too interesting, it doesn't belong. If it's not interesting, it doesn't belong.

This is obviously an objective criteria, so the mods are always right. Or maybe mildly right? Ahh.. what do we know?

Just post some stuff and don't spam.

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[–] Axolotl_cpp@feddit.it 0 points 1 month ago* (last edited 1 month ago) (1 children)

Maybe you've never seen a map made for land navigation?

Can you share one or the name of the projection used? I am having an harf time searching for it

Edit: i found that for air navigation they use Lambert Conformal Conic, for marine they use Mercator and for land i found nothing which makes sense (and probably it would be Mercator anyway)

[–] wonderingwanderer@sopuli.xyz 3 points 1 month ago (1 children)

https://doc.esri.com/en/arcgis-pro/latest/help/mapping/properties/coordinate-systems-and-projections.html

A local coordinate system uses a false origin (0, 0 or other values) in an arbitrary location anywhere on earth. Local coordinate systems are often used for large-scale (small area) mapping. The false origin may or may not be aligned to a known real-world coordinate, but for the purpose of data capture, bearings and distances can be measured using the local coordinate system rather than global coordinates. Local coordinate systems are usually expressed in meters or feet.

Example:

https://slcprdpublicrecords.blob.core.windows.net/0001sjradmin/PDF/CB_1877_15_10045793.pdf

[–] Axolotl_cpp@feddit.it 0 points 1 month ago