Okay, so I live in Nigeria and I believe about 40% locations are still unknow. I believe more work can still be done. 
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Hi @Olatubosun ,
Thanks for sharing with us your concerns.
In case, there are any information that needs correction or to be added on Google Maps, feel free to send it as feedback.
Just to let you know, your post is now available on Connect. I would like to apologize for your post being marked as spam. Our filters run 24/7 and they can be a little harsh at times.
You can visit this article to learn more - Why was my Connect post marked as spam?
I have also relabeled your post to How-tos, as it is more suitable. Feel free to check also the article How do I use the Idea Exchange?