You may want to merge the two sections of Kassim's Chasm into one way. In iD, you click on the first section, shift click on the second section. Then right click - Merge, or use the shortcut C (for combine). Nice additions.

Welcome to OSM! good to see someone mapping bike trails in nj. Keep up the mapping.

Welcome to OSM! the addition looks good. You can square the building by using the 'Q' key. I did that and added some additional tags.
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Keep up the mapping.

Welcome to OSM! Instead of deleting and recreating items, just modify them, so the history is maintained. Keep mapping!

I was in the area and made a couple of adjustments to the parking and service roads. Added the bank.

Welcome to OSM Natali! The outline of the building should follow the footprint of the building, not a general outline. Also, I don't think it was correct to delete the train track, as it was marked abandoned. Please continue to map. There is a wiki with more info, or ask questions in comments or on slack. If you want to get in touch with other mappers, please join our Slack community at https://slack.openstreetmap.us/ .

The outline of the house should just be a simple way instead of a multipolygon. Houses should outline the footprint of the house, which in this case should have all right angles at the corners (no diagonal lines). Also the house info should either go on the house or the node, but not both. I'll let you correct. If you have any questions, just ask or check out the wiki.

Welcome to OSM! thanks for adding the name and address. I was in the area, mapping to the west of this and noticed an error. I corrected the street name abbreviation, and removed the extra way that was added. I also added the outline of the building and combined it with your node info. Keep up the mapping.

Welcome to OSM! Your service roads look good, but the parking should just be an area with one tag. I've made the change. I don't think tunnel was correct either, tunnel is for underground things. I took a guess and changed that service to covered=yes. Keep up the mapping.
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there's also a playground on the front part.
It's not on images yet though.

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Looks good for the most part. If you use the 'Q' key, it will square the buildings. I added nsi info to the store, added the fuel building/roof and a few other tweaks. Nice work, keep up the mapping!
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You don't need to put parking on a node. that will give the warning amenity inside amenity. Just having it on the parking area is find. Also, you have 3 separate parking areas, but they could just be one big area. Nice work though. Keep it up!

Welcome to OSM! fyi, everything isn't a park. leisure=swimming_pool for the pool, and leisure=pitch, sport=tennis for the tennis court.

check out this wiki for more on leisure: leisure=*

Welcome to OSM! The additions look good.
The only addition you may want to the highway=footway, is:
bicycle=yes
segregated=no
surface=asphalt
Keep up the mapping!

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or bike-able! maxspeed 65 also seems incorrect.

Also, the service roads you added shouldn't be one way (and dont' need so many tags). Look at the other side of the same parking for examples.

Hi SS, Welcome to OSM! parking_space is usually used for a single space. You probably want to outline the area of the parking lot and use amenity=parking. Check out the wiki for more info:
amenity=parking

Welcome to OSM! roads inside parking lots are not unclassified, but highway=service and service=parking_aisle.
I have made the change, and added a few missed pieces. There is more info at highway=service
Keep up the mapping!

Welcome to OSM! The playground outline was great. You can use the Q key to square up an area. I've done since I tweaked the outline of the school. Keep up the editing!

Welcome to OSM! Your edit was good, but you misspelled 'conservative'. I have corrected it, and also made some tweaks to the outline of the building. Thanks for the edit, and keep it up.