I can only see one of them -- to the East of Boundary Street.

Oh, and could you avoid using all-caps for company names.

These are keepright errors.

This particular error was http://keepright.ipax.at/report_map.php?schema=87&error=77810321 : the node tagged as dog_park was redundant because it duplicated the dog_park tag on the area -- and as the area relates to something specific (the perimeter fence) it is probably better to keep it than the redundant node.

You can find more of them diagnosed at keepright errors at http://keepright.ipax.at/report_map.php

GerdP: I revisited the area and this time managed to cross to the island after carefully studying the traffic patterns.

First off, I would say that the area previously marked as highway=pedestrian does *not* meet the definition of a pedestrian zone as defined in osm.wiki/Tag:highway%3Dpedestrian. Visually it looks just like a pavement/sidewalk. So I suggest the correct tag for this is a simple highway=footway as at osm.wiki/Tag:highway%3Dfootway

I have provisionally made those changes, awaiting further comment if appropriate.

GerdP: Thanks for the comment. I'll have another look at it and see if there's another solution.

trigpoint: I agree, it is likely the power is used for general purposes rather than specifically for charging. So power_supply=yes is probably better and I will change them accordingly.

I did consider using pier -- but the description of "long and narrow" and "for berthing of vessels" discouraged me. There is boardwalk but that is intended for bridges. Various usages of platform imply transport. This is just a recreation and observation area. Nothing quite fits.

Aha! I was puzzled myself for a while.

It was meant to say layer=2 to ensure it appears above the water surface rather than under water. Now fixed, thanks for the observation.