OSI Consultation Process

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DaveWalsh
Posts: 54
Joined: 18 Mar 2011, 22:38

OSI Consultation Process

Post by DaveWalsh »

Mountaineering Ireland have just published a newsletter in which there is the ability to give feedback to OSI on the recent revamping of all their map types including consolidation / integration of data at all scales, which sounds momentous.

A hobby horse (OK, yet another one) of mine and surely of major interest to anyone who uses the Discovery Series 1:50,000 is the failure to show seawater depths beyond the low water mark. The previous OSI offering at half inch scale showed contours for LW, 5 fathoms and 10 fathoms, useful data it was a pity to have discarded in the move from trigonometric to photogrammetry in the 1990s. What they couldn't see they didn't show, they said. I engaged in a debate with them on the subject many years ago in the letters page in the Irish Times and my recollection is it ended up that they publicly undertook to restore depth contours when reviewing the Discovery templates.

I haven't bought a map for years ........

Does anybody know if OSI are yet publishing depth contours @ 1:50K?

Has ISKA been given observer status in the way MI has been or know anything about all this ?

And I suppose I should ask - do Irish kayakers still use 1:50,000 OSI maps ?

Thanks. DW

DaveWalsh
Posts: 54
Joined: 18 Mar 2011, 22:38

Re: OSI Consultation Process

Post by DaveWalsh »

Arising out of my having recently registered via Mountaineering Ireland for the OSI survey I have received two draft new Discovery sheets. First sight reaction : nice paper, no underwater contours.

In an exchange of correspondence in the Irish Times in August 2009, copy attached, OSI let things rest with the statement that

The issue raised by Mr Walsh in relation to the mapping depiction of the shallow seawater depths is also being considered by OSI in the context of the overall review of the Discovery Series.”

I don’t know if the 2009 review is the same review as this one now in 2021 or a different one (anyone with the skinny, I’m all ears), but either way nothing has been gained from this particular perspective.

Does anybody have the ear of anybody in OSI, or does anybody have any suggestion as to what anybody might now do to get anybody anywhere with any influence or authority to take notice of what I think is a very valid suggestion, that the older 20th century underwater contours be superimposed on the newer 21st century mapping sheets?

Obviously a health warning would be needed but that shouldn’t stop them doing what is right?

DW PS PDF can't upload, sorry.

DaveWalsh
Posts: 54
Joined: 18 Mar 2011, 22:38

Re: OSI Consultation Process

Post by DaveWalsh »

Following up ………

The good news is that in the draft new version of the Discovery series 1:50,000, the foreshore has been divided into and depicted as beach, sand and shingle, mud, and flatrock, not just beach / other intertidal.

I attach a photo AFTER of inner Dingle Bay from the sample sheet 78 showing all four (flatrock bottom left, you have to look for it), and the same BEFORE from an older sheet 78, - beach / other. Regrettably I don’t have an old half inch sheet 20 for direct comparison so I attach a sample from sheet 22 BEFORE BEFORE in the neighbourhood of Dungarvan / Youghal with the 5 / 10 fathom markings. If anyone has an old sheet 20 and could replicate it for me in a photo by email I would be grateful (even more grateful if they had a spare sheet 20 and might bargain …………).

I cannot find amongst the legends any explanation for the white aurora along all the coastline. It does seem to go from white to blue gradually through lighter shades and darker shades. It may be saying something or it may be artistic only. One always has to resist taking an instant dislike to something new, because often these things grow on you, but kneejerk reaction isn’t great, not yet anyway.

What Minister oversees OSI ?????

DW
OSI Before Before.jpg
OSI Before Before.jpg (149.04 KiB) Viewed 972 times
OSI Before.jpg
OSI Before.jpg (134.97 KiB) Viewed 972 times
OSI After.jpg
OSI After.jpg (119.19 KiB) Viewed 972 times

DaveWalsh
Posts: 54
Joined: 18 Mar 2011, 22:38

Re: OSI Consultation Process

Post by DaveWalsh »

Glenbeigh with depth contours, sheet 20.
Thanks to a well wisher.
Imagine having that data and not putting it out there.
DW
OSI Before Before Before 3.jpg
OSI Before Before Before 3.jpg (212.37 KiB) Viewed 971 times

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