If you want to map an island in a pond (or a courtyard in a building, or any other object with a hole in the middle), you want to create what OSM calls a "multipolygon":

1) Trace the outer and inner edges.
2) Select one of the edges, then shift-click to select the other one as well.
3) Right-click and select "Merge".

The editor is (usually) smart enough to realize that if you're merging two concentric objects, you want to cut the inner one out of the outer one.

I've done it for you here; you can look at it in the editor to see how it's done.

The correct way to add a bridge to part of an existing road/trail/whatever is to split the way at the ends of the bridge (right-click on the node at the end of the bridge and select the "scissors" icon), then select the part that represents the bridge and select the "bridge" structure type from the list.

Simply drawing a new line over the old one and labeling it a "bridge" like you've done here doesn't work. It just makes it look like there are two abandoned railways, one of them on a bridge over the other.

Is it really signed "Sunset Highway" all the way across the state? My experience from driving it was that the "Sunset Highway" signage stopped a bit before Reardan, replaced by generic "SR 2" or "US 2" signs, except where the road picked up a new name while passing through a town.

Okay, I've undeleted it.

It appears you deleted Wenatchee Valley College in this edit. Did you intend to do so?

Welcome to OpenStreetMap!

A couple of tips for better mapping:

1. You can change the background imagery by clicking on the "Background settings" tab in the editor -- the one that looks sort of like three stacked sheets of paper. Different imagery options are newer, or sharper, or better-aligned. In the Missoula area, it looks like "Esri World Imagery" is the newest, while "Esri World Imagery (Clarity) Beta" is the sharpest. I can't tell about alignment.

2. When you're adding things to the map, try not to connect unrelated objects to each other: it makes the map harder to edit and can confuse software that's trying to interpret the data. Connecting similar types of objects is fine (eg. connecting a park to a residential area, or connecting two buildings that share a wall), and connecting intersecting roads, trails, and the like is essential for routing software to be able to work properly.

You can tell that the editor wants to connect two objects because your cursor gains a tiny green dot or line in the lower-right corner, and you can tell they've been connected because there's a gray dot at the point where they meet.

Thanks for your contributions, and happy mapping!

Don't use the "name" field to describe the object -- it's clear that what you're adding is a bench from the fact that it's tagged as a bench.

If something doesn't have a name (and benches almost never do), it's fine to leave the "name" field blank.

When you're adding businesses to the map, it's helpful if you tag them with what sort of business they are, to let people search for them by type as well as by name. For example, "Rod's Harvest Foods" sounds like it's a supermarket.

The editor's got a huge selection of tags you can choose from, both generic ("restaurant", "post office") and specific ("McDonalds", which automatically adds the "fast food" tag, the "burger" cuisine, and fills in the name).

For a road that seems like it should connect but doesn't, there's a way to indicate that, but it's not the most obvious thing in the world. Click on the end of the road (you should get a pulsing circle to show that just the end has been selected rather than the whole road) and search for a tag called "no exit". I've updated the road in question to match your description.

Welcome to OpenStreetMap!

A couple things to keep in mind for future mapping:

1) The usual practice for mapping schools is to put the school name on the school grounds, and only put a name on the school building if it's different from the school name.

2) "Living Street" is pretty much purely a European concept. You can find the tags for ordinary streets by searching for "road".

3) Make sure the roads you're adding are connected properly. The extension of Clodfelter Road you added was only connected at one end.

I've fixed the problems for you here, but it's something to remember.

When you're adding a building, there's an easy way to get square corners: once you've drawn and tagged it, right-click and select "Square" (the third option from the right-click menu), or highlight it and hit the "S" key. The editor will adjust the corners to the nearest 90-degree or 45-degree angle.

The original tracing of the building was more accurate. The reason it appears to have a point on the west side is that the satellite wasn't quite directly overhead when it took the picture. This makes the peak of the roof appear to stick out to one side.

This building contains a Target, a Best Buy, and probably at least one not-yet-mapped business between the two. Putting the name "Target" on it is both incorrect and redundant with the existing mapping of the Target store.

Are you sure these are reservoirs? From the air, they look rather like settling ponds for treating sewage.

Glassman, Tori B is editing with Maps.me. From what I understand of how the program works, they've got no control over how often or how much they upload at any given time.

I think there are a whole lot of people who would be rather unhappy to find you've made their houses part of a state park.

Many of the programs and websites that make use of OpenStreetMap only update once a month, if that. Because of this, it's not advisable to map things (such as the typical fireworks stand) that only exist for a few weeks every year.

When you're mapping a stream, draw it from upstream to downstream, so that the flow direction will show up properly on the map. I've fixed Ashley Creek for you, but keep it in mind for the future.

The school name is already present on the school grounds. No need to repeat it on the school building.

Is there a reason why you're insisting this is a drydock rather than a pier?