Various errors have been fixed. Here is a list with all the errors still remaining, these links all have one object not showing up:

1 note/1522313
2 note/1522310
3 note/1522308
4 note/1522306
5 note/1522306
6 note/1522304
7 note/1522303
8 note/1522302
9 note/1522301
10 note/1522300
11 note/1522299
12 note/1522297
13 note/1522296
14 note/1522294
15 note/1522291
16 note/1522290
17 note/1522289
18 note/1522288
19 note/1522287
20 note/1522286
21 note/1522283
22 note/1522282
23 note/1522279
24 note/1522278
25 note/1522276
26 note/1522273
27 note/1522272
28 note/1522271
29 note/1522269
30 note/1522268
31 note/1522267
32 note/1522265
33 note/1522263
34 note/1522262
35 note/1522260
36 note/1522257
37 note/1522256
38 note/1522254
39 note/1522253
40 note/1522252
41 note/1522251
42 note/1522250
43 note/1522249
44 note/1522247
45 note/1522246
46 note/1522245
47 note/1522244
48 note/1522243
49 note/1522242
50 note/1522240
51 note/1522239
52 note/1522237
53 note/1522236
54 note/1522235
55 note/1522234
56 note/1522233
57 note/1522232
58 note/1522231
59 note/1522230
60 note/1522229
61 note/1522228
62 note/1522226
63 note/1522225
64 note/1522224
65 note/1522222
66 note/1522220
67 note/1522219
68 note/1522218
69 note/1522215

If anyone wants to fix (some of) these errors, I would appreciate it a lot.

This is also a non-field-not-showing-up error: note/1522292#map=19/37.51570/127.12961&layers=N Can I fix that the way I’ve explained it over here?

Freebeer, do you think I can fix those 74 errors I’ve posted here myself? Almost all of those errors contain a sports field which doesn’t show up. In my last 2 edits, you can see I’ve added the multipolygon the right way, so I think I can fix that. One of those 74 errors contains a stadium which should be removed (Hughes Stadium in Colorado). I don’t know how to fix that without possible errors, I think it’s better if someone else fixes that.

Just an idea... maybe I can post a temporary note if I find something that probably needs an edit. Freebeer (if he wants to) can check if he agrees with the note, and tell me if I’m able to edit it myself or not. If it’s a difficult edit, I can work together on it with someone else, or let somebody else fix it.

Because I'm unable to edit now, maybe someone else can fix these errors I've found:

1 note/1521262
2 note/1522248
3 note/1522292
4 note/1522264
5 note/1522313
6 note/1522311
7 note/1522310
8 note/1522308
9 note/1522306
10 note/1522304
11 note/1522303
12 note/1522302
13 note/1522301
14 note/1522300
15 note/1522299
16 note/1522297
17 note/1522296
18 note/1522294
19 note/1522291
20 note/1522290
21 note/1522289
22 note/1522288
23 note/1522287
24 note/1522286
25 note/1522285
26 note/1522283
27 note/1522282
28 note/1522279
29 note/1522278
30 note/1522276
31 note/1522273
32 note/1522272
33 note/1522271
34 note/1522269
35 note/1522268
36 note/1522267
37 note/1522265
38 note/1522263
39 note/1522262
40 note/1522260
41 note/1522257
42 note/1522256
43 note/1522254
44 note/1522253
45 note/1522252
46 note/1522251
47 note/1522250
48 note/1522249
49 note/1522247
50 note/1522246
51 note/1522245
52 note/1522244
53 note/1522243
54 note/1522242
55 note/1522240
56 note/1522239
57 note/1522237
58 note/1522236
59 note/1522235
60 note/1522234
61 note/1522233
62 note/1522232
63 note/1522231
64 note/1522230
65 note/1522229
66 note/1522228
67 note/1522226
68 note/1522225
69 note/1522224
70 note/1522222
71 note/1522220
72 note/1522219
73 note/1522218
74 note/1522215

Freebeer, do you want to be my “mentor”? You gave me a lot of very good hints and information. Is it okay to still do safe edits (adding missing houses)? I’ve added thousands of missing houses and never received a complaint about those. Those are easy edits. Editing stadiums often is much more complicated.

That’s okay. Do you know anybody who wants to be my mentor? By the way, can you please tell me if my multipolygon I’ve tried (my last two edits) are without errors?

I've added a multipolygon, because the field was not visible because of stadium tag overlapping. Can anyone please confirm if the multipolygon was added the right way? changeset/62510357

I didn't use the HIF link as a source, I just showed a picture where people can see that three new stands have been built. Only the stand on the right hasn't been completely rebuilt. You're right about the forum, I've tried to post in the forum but it was not possible for some reason.

Maybe you can add the new stands the right way? Three of the four stands have been replaced with new stands.

At this stadium I just wanted to add the new stand, which was not yet added, to make OSM more up-to-date. I’ve read a lot on those Wiki’s, but I don’t understand everything they try to explain. I’m sorry for that. English is not my first language, I don’t understand everything English.

No, I didn’t delete any stand, I’ve changed the shape. I did remove nodes (those white dots, is that not allowed? They don’t contain information right? How can the new stand be added the right way?) because the stadium shape doesn’t require that many nodes anymore. After the recent renovation works, the long side changed in shape. I’m done with all the stadium edits, I’m only checking older edits of me for possible errors. My final edits were just missing houses added.

I will remove the notes very soon, they are just temporarily because I didn’t fully understood why some buildings didn’t show up (some I understood the reason, some not). I now understand how I can make the multipolygon, I’ve received a lot of information through the notes. Don’t get me wrong, your feedback is also very useful, but I needed more specific information to fix the errors. By the way, I don’t use Google maps or aerials for drawing. I use Bing (most edits) and a lot of knowledge from stadiums I’ve visited. Stadium renovations take place a lot. At this Duke stadium, I’ve added the athletics track which was missing (if I remember well). It is on Bing and it still seems to be there.

Hi, I didn’t remove objects, I changed the shape of the stadium because it has new stands. Here you can see it has new stands: http://www.hif.se/news/tidsschema-invigningen-av-olympia/

This is one of the stadiums I've visited in Orlando.

Thank you for the information again freebeer :) (I saw you wrote this message a few days ago, I missed it for some reason).

About my previous reaction: I can see the sports complex (Aspire Zone), which includes various sports fields, arenas and stadiums, is known as "building". This way, the other elements in the sports complex are not visible. How can it be fixed?

This stadium doesn't show up, can anyone tell me why (and/or fix it)?

osm.org/#map=18/25.26361/51.44825&layers=N

Thank you for the help!

Thank you for the information freebeer :)

I've removed my multipolygon, it didn't work.