Since Lemmy doesn't currently have the ability to host a wiki index as far as I can tell, here's a list of the rules as was originally stated on r/EarthPorn, this'll also be put onto the sidebar.

Rules:

Submissions must be:

• A photograph.

  • No Paintings, illustrations, gifs, videos, or interactive images.

• A photograph you took (OC)

  • or one which you can provide the original source for. Do not rehost non-OC images to reddit or imgur. Failure to provide the photographers name or the original source of the image can result in a ban. A single image

• Albums may be posted in the comments. Panoramas, Image Stacks, Composites, and images edited via Photoshop or similar software are allowed.

• An image featuring a natural landscape

  • Images must have visible land. Images with humans, machines, boats, roads, airplanes, farms, animals, buildings, or other human-made objects in them will be removed.

• An unsilhouetted image

  • Images where details in the landscape are not visible due to silhouetting will be removed.

• No photos taken illegally

  • This includes flying your drone in a no-fly zone. Please respect local laws and access closures!

Title Requirements:

You submission title must contain the following:

• The location of the area in the photo.
  • When it comes to location, the more specific the better. If you wish to not disclose the location you should at the very least name the state/country. Rule of thumb for naming only the location (e.g. a lake, mountain): if one can find the place immediately by searching it in google it's fine. For possibly ambiguous locations add state/country for safety. The resolution of the image in pixel format.

For example, an image taken on an iPhone 6 would have a resolution of [3264x2448] The photographers name.

If you took the photo use [OC]. OC submitters will be reward with different camera flairs based on number of OC submissions. Do not include your device name in the title.

• Feel free to add photography details such as camera, lens, and settings, as a comment.

• Do not ask for upvotes in your title.

Comment Rules:

Hate Speech, Abusive remarks, homophobia, and the like have no place on this subreddit, and will be removed on sight.

Please contribute to the discussion positively; constructive criticism is fine, but if you don't like a picture and you wish to voice your opinion please refrain from abusing the photographer/submitter. Other important rules:

* Do not edit, rehost or modify images submitted here without permission of the photographer. This includes edits to "fix" the colors of an image or remove a watermark.

Non-OC submissions are restricted to one per day.

• Regarding reposts: Submissions are considered reposts if they have been submitted in the last 2 years or if they have received more than 20,000 karma when they were previously submitted Circlejerky/sandbagging/pandering titles may be removed. If you have any questions check out the wiki. Breaking multiple rules will result in a ban