Turns to transform each terrain type?

[WildPony]

Hello . I conducted a cursory search for this and came up empty, but i am confident that several of you will know the answer. Can you please tell me how many turns it takes for an engineer to transform plains to grass, hill to plains, mountain to hill, etc? Many thanks.

 

[Major Advantage]

I knew I once saw such a table you are looking for! It took some time to find, but here it is:
(Copied from http://apolyton.net/showthread.php/20497-Info-Settlers-Engineers-(GL)?s=)

3.2.1. TABLE 3-Work time for Settlers and Engineers

Settler/Engineer To build a road:
__2__ __1__ On Tundra/Grassland/Desert/Plains
__4__ __2__ (with a river)
__4__ __2__ On Glacier/Forest/Hills/Swamp/Jungle
__6__ __3__ (with a river)
__6__ __3__ On a Mountain
__8__ __4__ (with a river)
Settler/Engineer To build a railroad:
__4__ __2__ On Tundra/Grassland/Desert/Plains
__6__ __3__(with a river)
__8__ __4__ On Glacier/Forest/Hills/Swamp/Jungle
_10__ __5__ (with a river)
_12__ __6__ On a Mountain
_14__ __7__ (with a river)
Settler/Engineer To irrigate/ improve farmland:
__5__ 3 (2½) On Grassland/Plains/Desert
_10__ __5__ On Hills/Tundra
Settler/Engineer To clear:
__5__ 3 (2½) Forest to Plains
_15__ 8 (7½) Swamp/Jungle to Grassland
Settler/Engineer To mine:
__5__ 3 (2½) Desert
_10__ __5__ Hills or Mountain
_15__ 8 (7½) Glacier
Settler/Engineer To reforest:
_10__ __5__ Grassland
_15__ 8 (7½) Plains/Swamp/Jungle
Settler/Engineer To build a fortress:
__3__ 2 (1½) On Grassland/Plains/Desert/Tundra
__4__ __2__ On Glacier/Forest/Hills/Mountain/Swamp/Jungle
Settler/Engineer To clear pollution/build airbase:
__4__ __2__ On any square
Settler/Engineer To transform:
___________ Grassland/Plains/Desert/Tundra to:
(N/A)_ _10__ Hills/Grassland/Plains/Desert
___________ Forest/Glacier/Hills/Swamp/Jungle to:
(N/A)_ _20__ Grassland/Tundra/Plains/Plains/Plains
(N/A)_ _30__ Mountain to: Hills

 

[WildPony]

Wow this is great Major Advantage, thank you !

30 turns for an engineer to transform a mountain to a hill, quite a project!... and then what you have is still just a hill!

Thanks again!

 

[Ali Ardavan]

Thanks major for finding the original post. I saved a copy on my machine years ago. This is one of the few examples of early research that was comprehensive. It was correct and left nothing uncovered. Truly a masterpiece.

 

[catalin72]

In this site I found this thread by Agricola:'How to get the most work from Engineers and Settlers'
http://forums.civfanatics.com/showthread.php?t=90129