Original Post from Joe Philley:

New Portal Submissions #Ingress

Help us fill out the play field by locating, photographing and submitting candidate Portals.

Steps to submit a candidate Portal:

Make sure your GPS on camera app is enabled (Open Camera > Settings > Store location > ON; you may also need to turn on Settings > Location services > Share Picture Location, if available).
Snap a photo with your Android phone with the standard camera app
Select the Share option for the photo
Share to NIA Super Ops (with the Ingress logo)
Enter a proposed title for the Portal and touch OK.
This prepares an email to our Niantic Ops team with the photo and location of the object.
Send the email.
Our operations team will review the picture and object location and then add it to the game database if it meets our general criteria for Portals.
General Portal criteria:

Should be safe and accessible to the public
Example types of objects:
Statues
Unique architecture
Outdoor murals
Historic buildings
Special outdoor buildings
Unique local businesses
Decisions on whether or not a Portal will be accepted will occur within 2-3 weeks. Expect a Portal to go live 2-3 weeks after it is accepted.