Showing posts with label landscape. Show all posts
Showing posts with label landscape. Show all posts

Monday, 30 March 2020

throwing shapes

...I'd ask her, but she's video-conferencing...

getting feed from ur glasses



...a single, sharp red dot centred on the fallen bot's torso

Friday, 1 May 2015

choke point

In military strategy, a choke point (or chokepoint) is a geographical feature on land such as a valley, defile or a bridge, or at sea such as a strait which an armed force is forced to pass, sometimes on a substantially narrower front, and therefore greatly decreasing its combat power, in order to reach its objective.

fish knife - cut down tool

"Removing the ligature from a prisoner as swiftly as possible is crucial to ensuring the best possible chance of surviving and avoiding long-term or permanent brain damage."

Saturday, 24 January 2015

chalk stream

http://www.fishpal.com/England/ChalkStreams/Map.asp?dom=Pal



Chalk streams are streams that flow through chalk hills towards the sea. They are typically wide, shallow, and due to the filtering effect of the chalk they are alkaline and clear. There are 210 chalk streams in the world, and 160 of those are in England.[1] Chalk streams are popular with fly fishermen who fish for trout on these rivers.
Chalk geology is porous, and rain falling onto chalk hills percolate directly into the ground, where the chalk acts as an aquifer. The water filters through the chalk, re-emerging lower down the slope in springs. The chalk acts as a temporary reservoir by regulating the amount of water supplied to the springs. This is why many chalk streams in the UK have stable flow regimes that vary only slightly over time. The temperature of the emerging surface water is fairly stable and rarely deviates from 10°C (50°F). On cold winter mornings, it can look as though steam is rising above the relatively warm river.
Chalk is a soluble geology in rainwater because rain is naturally slightly acidic. The products of chalk weathering are dissolved in rainwater and are transported in stream flow. Chalk streams transport little suspended material (unlike most rivers), but are uniquely mineral-rich. The surface water of chalk streams is commonly described as 'gin clear'. The channel bed consists of angular flint gravel derived from the natural flint deposits found embedded within the chalk geology that is characteristically free from fine sediment deposits.
The unique characteristics of chalk stream ecology are due to stable temperature and flow regimes combined with highly transparent water and lack of sand grade sediment particles.
The chalk streams have been intensively managed for many generations

wikipedia

Tuesday, 6 January 2015

encounters

For the early voyagers, wonder not only marked the new but mediated between outside and inside (Milton's 'sees|Or dreams he sees'). Hence the ease with which the very words marvel and wonder shift between the designation of a material object and the designation of a response to the object, between intense, almost phantasmagorical inward states and thoroughly externalised objects that can, after the initial moments of astonishment have passed, be touched, cataloged, inventoried, possessed.

Gleenblatt/ Marvellous Possessions/ 22


Sunday, 30 November 2014

viewshed

 He who from the top of AEtna casts his eyes leisurely around, is affected chiefly by the extent and diversity of the scene. Only by a rapid whirling on his heel could he hope to comprehend the panorama in the sublimity of its oneness. But as, on the summit of AEtna, no man has thought of whirling on his heel, so no man has ever taken into his brain the full uniqueness of the prospect; and so, again, whatever considerations lie involved in this uniqueness, have as yet no practical existence for mankind.
 http://xroads.virginia.edu/~HYPER/poe/eureka.html

A viewshed is an area of land, water, or other environmental element that is visible to the human eye from a fixed vantage point. The term is used widely in such areas as urban planning, archaeology, and military science. In urban planning, for example, viewsheds tend to be areas of particular scenic or historic value that are deemed worthy of preservation against development or other change. Viewsheds are often spaces that are readily visible from public areas such as from public roadways, public parks or high-rise buildings. The preservation of viewsheds is frequently a goal in the designation of open space areas, green belts, and community separators.

In digital imaging, a viewshed may be a binary raster indicating the visibility of a viewpoint for or from an area of interest. A pixel with a value of unity indicates that the viewpoint is visible from that pixel, while a value of zero indicates that the viewpoint is not visible from the pixel. In certain disciplines, such as radio communications, 'visibility' may be probabilistic, therefore viewshed may be represented with non-integer values.
In radio, a viewshed is the area where a specific combination of transmitter, antenna, and terrain allow reception of signal.

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Avebury// googleearth