If you are looking for a map for the punggol waterway, the best map is on URA website.
http://www.ura.gov.sg/mp08/map.jsf?goToRegion=SINKey in "Sentul Crescent" in the Street Name box, and click on go. Then, click on the magnifying glass icon with - sign, to zoom out, to view a larger area.
For Legend for what the colours and labels mean, look for the icon named legend. Or go to
http://www.ura.gov.sg/MP2008/ims/legend.html------------------
For satellite imagery, you can look up Google Earth. The imagery appears to be around 1+ years old, when the waterway was under construction. You can see the outline of the waterway,
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streetdirectory.com does not have updated map of the waterway at this time.