Historical aerials of Pulau Ubin's acquaculture ponds

 Here's a slide show of Google Earth snapshots of Pulau Ubin's aquaculture ponds 2002 to 2014

NParks Pulau Ubin maps
from NParks website
Click on 'Download map' to get full Ubin maps from the NParks website

Chek Jawa Wetlands 
from NParks Notice dated 24 Sep 2007 with accompanying map: Official designation of Chek Jawa Wetlands as an area off limits to boaters, water recreational activities including fishing and swimming.
With effect from 1 Oct 2007, the area bounded by the following coordinates (demarcated in attached plan, “CJW.pdf”) and known as “Chek Jawa Wetlands”, is managed by the National Parks Board (NParks), under the Parks and Trees Act 2005 and the Parks and Trees Regulations 2005. Also posted on the wild shores of singapore blog.

URA Master Plan 2014
from the URA website

URA Parks and Waterbodies Plan 2014
from the URA website

Other maps

Pulau Ubin Topographic Map
Digitised by Catholic High Scout Group from habitatnews flickr

Map handed out at bicycle shop? From Pilgrims Process 28 Aug 2006