WebMean spring & neap ranges. The mean spring range is the difference between mean high water springs (MHWS) and mean low water springs (MLWS). The mean neap range is the … WebThe information also includes the height of the lighthouse above Mean High Water Springs. The lighthouse is 72m above sea level. This does not mean that the lighthouse structure is 72 metres high, just that the centre of the …
data - UK coastline shapefile? - Geographic Information …
WebMean higher high water Similarly, the mean higher high water (MHHW) is the average height of the highest tide recorded at a tide station each day during the recording period. It is … We produce digital boundaries as shapefiles (a format produced by ESRI). We create boundaries for each geography at full resolution and in a generalised format. We offer two coastal extents for the full and generalised sets: 'extent of the realm' and 'clipped to the coastline'. The four boundary types we produce are … See more You can download the full, extent and generalised, clipped boundaries from the Open Geography portal. See more Digital boundary products and reference maps are supplied under the Open Government Licence. You must use the following copyright statements when you … See more hopton wood quarry
Chart datum - Wikipedia
WebMean high water, or the average of all observed high-water levels, is the datum used to represent shoreline on charts. Tidal datums also provide baseline determinations for the Exclusive Economic Zone, as well as … WebBoundary-Line contains every type of administrative area for England, Scotland and Wales. Scale. All boundaries are captured and maintained to a generalised scale of 1:10 000. Update frequency. Twice a year – May and … WebTools. Tidal range is the difference in height between high tide and low tide. Tides are the rise and fall of sea levels caused by gravitational forces exerted by the Moon and Sun and by Earth's rotation. Tidal range depends … lookout grill blowing rock