Blocktopograph

This is an UNOFFICIAL app (See disclaimer) .Blocktopograph is a fan-made app for MCPE, it includes a top-down world viewer and a NBT editor.
Note: The app is not yet updated for v. 0.16, do not try it on this version without backups!
*Update*: the app is open-source now! It can be found on the GitHub profile of @protolambda.It will soon be updated to work for v. 0.16.
The app is in "Beta" from version 1.0.0 to 2.0.0, it is stable enough to use, but not feature complete.However, you should ALWAYS MAKE BACKUPS.
Worldmap features:
- Immersive mode (full screen) for screenshots!- The worldmap shows all *saved* terrain (it does not generate it).- All mobs have markers!- Spawn marker!- Player marker!- Custom markers!- Teleport your local player! No more long walks!- Toggle the grid- Toggle the markers- Map-types: Overworld, Cave, Slime-chunks, Heightmap, Biomes, Foliage color, X-ray, Light, Nether
You can reach the developer on twitter: @protolambda

Disclaimer
NOT AN OFFICIAL MINECRAFT PRODUCT. NOT APPROVED BY OR ASSOCIATED WITH MOJANG.THE APP IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND.