What was Christopher Columbus developments after landing?

There were no "developments". He left 39 men on the island and when he returned they were all dead. He was a failure in Spain because he didn't return with gold or a route to India and few knew he had left. He added very little knowledge to the knowledge base or maps.
There were no "developments". He left 39 men on the island and when he returned they were all dead. He was a failure in Spain because he didn't return with gold or a route to India and few knew he had left. He added very little knowledge to the knowledge base or maps.