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Post details Post   (Contract pics)
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simon3
2014-05-21 09:16:00
"Revised mapping around Glenmalure - Lugduff." from simon3 Contract pics
Picture: Revised mapping around Glenmalure - Lugduff. (Contract pics)

Improved contours.
Context of comment:As you may know, MountainViews offers various layers when displaying maps. (Grey "layers" button at top right of map). One of these is Open Street Map available in two flavours "Mapnik" and "Cyclemap". The latter offers inbuilt contours and layer tinting. The former doesn't so we also offer two additional layers Hillshade and Contours.
Message:An improved form of Hillshade and Contouring has become available and we are trying it out.
To try, go to the layers button, click on Mapnik and tick hillshade and contours.

Stop reading unless you are interested in the tech!

The new layers certainly provide more detail in the contours than any previous map including that from OSi /L&PS. However the academics who provide it, only claim it is experimental and it remains to be seen how accurate it is in practice.

Nowadays the modern approach to creating hillshading and contours starts with a Digital Elevation Model or DEM. In the past maps such as Open Street Map used a variety of data that came from NASA called SRTM, which provided radar height information on a grid of around 91m X 56m (at Irish latitudes). But a series of further missions called ASTER created data with a grid of around 30m X 30 from photogrammetry. Various agencies have combined SRTM and ASTER to create a more accurate DEM and then used it to create contours and hillshading and made these available for free. (View our credits section for more detail.) So, take a look. Bear in mind that the data sources aren't wholly reliable.
Additional points:What would be interesting is to compare some land, in practice, with the new contours.
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RECENT CONTRIBUTIONS 1 2 3 .. 21 Next page >>
Summit Comment
An Bhinn Bhuí: Benwee Loop walk towards Portacloy.
ucampbell 17 hours ago.
The Loop walks here are well signposted, it's a great idea to go out onto each headland.

  
Summit Comment
Doonvinalla N Top: Coastal Hill
sandman 21 hours ago.
On 26/4/2014 i spent a very enjoyable afternoon walking this area visiting the army observation hut and the stone constructed EIRE marking as part of an addition to the Benwee Head Loop walk but i...

  
Summit Comment
Doonvinalla N Top: Flat topped but hard to get to.
simon3 21 hours ago.
View from the west.

Track
Circuit of Dirkbeg Lough - easier ascent
simon3 2 days ago.
The purpose of this walk is to reach the Maumtrasna plateau and Maumtrasna NE top (MNET). The lattter is quite possib... walk, Len: 11.6km, Climb: 564m, Area: Maumtrasna North-East Top, Partry/Joyce

  
Track
Near Galtybeg, Galty Mountains (Ireland)
caiomhin 2 days ago.
walk, Len: 11.3km, Climb: 663m, Area: Galtybeg, Galty Mountains (Ireland) Galty...

  
Track
Benwee Coastal Walk
simon3 2 days ago.
The walk starts at a small carpark and Wild Atlantic Way sign just west of Benwee. In fact some of the local rock has ... walk, Len: 8.1km, Climb: 245m, Area: An Bhinn Bhu?, North Mayo (Ireland) An B

Summit Comment
Benwee NE Head: Jagged summit
simon3 21 hours ago.
View from the east.

  
Forum: General
Riddle of the Spinc
BleckCra 2 days ago.
I was at Glendalough yesterday and on the Spinc for the first time. I cannot imagine there haven't already been a thousand hours debate on the boardwalk and and that there won't be a thousand hour...

  
Summit Comment
Benwee NE Head: Jagged summit
simon3 21 hours ago.
Picture from the west.

Summit Summary
Kid Island: Steepwalled island.
Collaborative entry Last edit by: simon3 23 hours ago.
Kid Island is very visible from Benwee Head.

  
Track
Lenadoon Coastal Walk
simon3 3 days ago.
walk, Len: 2.5km, Climb: 8m, Area: Mayo Coastal Hill (Ireland)

  
Summit Comment
Buckaun East: Cliffy north edge.
simon3 23 hours ago.
This is a picture of Buckaun East taken from the valley below.. Obviously the safest way to go up and down this is to the left or south of the ridge.


RECENT CONTRIBUTIONS 1 2 3 .. 21 Next page >>