MountainViews
Welcome to MountainViews
If you want to use the website often please enrol (quick and free) at top right.

General Whatever you want to say that doesn't fit under the comments about places or another forum.
Sort by >

More controls

<< Prev page 1 .. 29 30 31 32 33 34 .. 385 Next page >>
Post details Post   (Contract pics)
Most of the techni.. by aidand   (Show all posts)
Morning, Mr Walker.. by tamjk   (Show all posts)
Hi TamI don't know.. by Peter Walker   (Show all posts)
Wicklore,I realise.. by tamjk   (Show all posts)
mcrtchly
2015-09-02 16:09:01
OSI public viewer and 1:25,000 maps
In reply to Tamjk's recent post about OSI maps, I can make the following observations:

The depiction of scale of digital maps on a computer screen depends upon the 'zoom' level and the pitch (pixel size) of the screen. For example looking at Mullaghanattin on the OSI public viewer at third zoom level (reported at 1:10,000 by the OSI website) gives images which are different sizes on different displays. On my LCD desktop monitor which has 47 pixel per cm (ppcm) I measure the distance between the summit of Mullaghanattin and the 700m contour to be 2.5cm, whilst on my tablet (62 ppcm) the distance is 1.3cm. Clearly a monitor with a higher density of pixels per cm will show a smaller scale image than that with a smaller ppcm. Web sites often quote the scale of a map based upon a nominal pixel density of with 72dpi (28ppcm) or 96dpi (38ppcm). If you want an accurate scale of the displayed map on a website you need to know the dpi/dppcm chosen by the web programmer for the map and you need to use a monitor with exactly the same dpi/ppcm. So just to reiterate THE SCALE QUOTED BY A WEBMAP IS UNLIKELY TO BE CORRECT

I think Wicklore has answered your misconception about the 1:25,000 mapping. I have the Reeks map in front of me here and I can assure you that Mullaghanattin is on the map. Concerning National coverage at 1:25,000 I suggest that you take this up with OSI, but I doubt that it would be economic to issue paper maps at this scale for the whole country. Anyhow, much more accurate digital map data (to building level) is available for the whole country from OSI which can be brought by any user.

Finally, I am disappointed by your use of the term 'Sirrah' when addressing someone who is a professional mapper with over 35 years experience in paper and digital mapping - perhaps you can explain your reasoning for implying that you have some sort of intellectual superiority.
Addressing someone.. by kernowclimber   (Show all posts)
Hi tamjk. In your .. by wicklore   (Show all posts)
** The OSI public .. by tamjk   (Show all posts)
Those who keep a s.. by Onzy   (Show all posts)
Go to this webpage.. by tamjk   (Show all posts)


RECENT CONTRIBUTIONS 1 2 3 .. 16 Next page >>
Summit Comment
Bealick: Between two counties
Wilderness 11 hours ago.
I approached this mountain from the North East ,coming from the Coomataggart mountains. When I got to the top I had to walk around for a few minutes to pinpoint the true summit; which I'm sure is...

  
Track
Nephin from the North....stunning views.
derkelly274 11 hours ago.
First time climbing Nephin for both myself and my friend. We decided to go at it from the North as it seemed like a more walk, Len: 5.3km, Climb: 644m, Area: Nephin, North Mayo (Ireland) Nephin

  
User profile
derkelly274
derkelly274 14 hours ago.
Enjoy climbing the odd hill. Hope to visit more and more.

Summit Comment
Nephin: A looped climb from the North. Stunning views all around!
derkelly274 11 hours ago.
First time climbing Nephin for both myself and my friend. We decided to go at it from the North as it seemed like a more interesting prospect. There was access to the woods on the northern slope o...

  
Track
Camenabologue SE
Bunsen7 2 days ago.
This shortish alternative track makes use of a forest ride (as heralded by Simon3) from Glenmalure to reach Camenabol... walk, Len: 10.6km, Climb: 664m, Area: Camenabologue SE Top, Dublin/Wicklow (Ir

  
Summit Comment
Knockshanahullion: Route Changes on Avondhu Way
Pepe 17 hours ago.
Approached from carpark above Bay Lough (B). There are new signs on the waymarked trail saying "Blackwater Way Please Note Route Changes". The waymark arrows on the markers look shiny and new, abo...

Track
Mullaghcleevaun circuit
osullivanm 2 days ago.
A very pleasant circuit although some difficult ground between Duff Hill and the return to start of hike. walk, Len: 17.3km, Climb: 792m, Area: Black Hill, Dublin/Wicklow (Ireland) Blac...

  
Summit Comment
Tooreenbaha: Early on a sunny April morning
peter1 23 hours ago.
Tooreenbaha, above the Rabach's Glen at the start (or finish!) of the circuit. Knockatee is the distinctive hill in the background.

  
Forum: General
An Alp for OAPs...
Colin Murphy 4 days ago.
If you an ageing hillwalker like myself who might have liked to bag an ‘Alp’ but are too long in the tooth to contemplate such an adventure, fear not, there is a simple little Austrian Alp you can...

Forum: General
MOUNTAINVIEWS MEMBERS MEET APRIL 2018
liz50 5 days ago.
Not long now until the first Mountainviews members meet of 2018. We will be walking in the Galtee mountains on Saturday 28th April. If you are thinking of joining us and would like more details pl...

  
Summit Comment
Knockowen: A view from the West
peter1 23 hours ago.
A view of Knockowen from Tooreenbaha. The Healy Pass is the gap on the right of the picture and the road can be seen rising across the slopes.

  
Track
Bonscale Pike-Wether Hill Loop
David-Guenot 6 days ago.
A beautiful route which takes in 6 wainwrights (Bonscale Pike, Arthur's Pike, Loadpot Hill, Wether Hill, Steel Knotts... walk, Len: 17.3km, Climb: 948m, Area: Swarth Fell (Ullswater), Lake District -


RECENT CONTRIBUTIONS 1 2 3 .. 16 Next page >>