A common desire on iNaturalist is to create a project for observations from a particular place – your backyard, a local nature preserve, a school campus, etc. If you are trying to do this, the first thing to check is whether iNaturalist already knows about your place. If your place is an administrative area equivalent to a country, state, or county, iNat almost certainly knows about it. For example, if I wanted to use Onondaga County, New York, I can already choose that boundary. Many other boundaries are also already in the database, so to see if iNat knows about your place, you can look for it by name in the search:
You can also use Explore and zoom to your area, then check the list of Places of Interest:
Edit: And if there are already observations in your area, you can check an observation page for encompassing places, see @twainwright’s post below. (Note that obscured observations won’t necessarily show all their encompassing places.)
It’s also possible to combine multiple places for a single project, for example Onondaga County and Cayuga County.
If you have determined that you will need to add a place to iNaturalist then you will need at least 50 verifiable observations.*
Even if you have permission to add new places, you cannot make places that cover too much area, that cover too many observations, or that are too complex (too many points defining the boundary). Currently that means the area should be smaller than the state of Texas (approximately), the number of observations should be less than 200000, and the file size should be less than 1 MB.
If your place meets the above requirements and you already have a kml file for the boundary of your place, you can upload it at https://www.inaturalist.org/places/new.
If you don’t have a kml file for your place, you will need to either find or make one.
Here is a tutorial for uploading US city boundaries from census data.
Here is a tutorial for uploading a place that OpenStreetMap already has.
Here is a tutorial for uploading a place that you draw yourself.
Once iNaturalist knows about your place, go to https://www.inaturalist.org/projects/new to create your project. In the Observation Requirements section, use the search box under Include Places to select your place.
For more information about iNaturalist projects, see https://www.inaturalist.org/pages/managing-projects
* A verifiable observation is an observation that has a date, a location, media evidence (image or sound), and has not been voted captive/cultivated. After you have 50, it may take a few hours for the system to process your account status.