Geochemical Baseline Survey Of The Environment (G-BASE) For The UK.

The G-BASE programme involves systematic sampling and the determination of chemical elements in samples of stream sediment, stream water and soil, to build up a picture of the surface chemistry of the UK. The average sample density for stream sediments and water is about one site per 1.5-2km square, and for soils one site per 2km square. Analytical precision is high with strict quality control to ensure countrywide consistency. Results have been standardised to ensure seamless joins between geochemical sampling campaigns. The data provide baseline information on the natural abundances of elements, against which anomalous values due to such factors as mineralisation and industrial contamination may be compared. Analytical data for the 150 microns fraction of soil and stream sediment samples are available for some or all of: Ag, As, B, Ba, Bi, Be, Ca, Ce, Cd, Co, Cr, Cs, Cu, Fe, Ga, K, La, Li, Mg, Mn, Mo, Nb, Ni, P, Pb, Rb, Sb, Se, Sn, Sr, Th, Ti, U, V, Y, Zn, and Zr. Most water samples have been analysed for alkalinity, pH, conductivity, F and U and some for multi-element analyses including Al, Cl, Na, Si, SO4,NO4, and TOC. The project now routinely determines the elements listed in the <2mm fraction of surface soils.

Guyafor: permanent plots of forest inventories in French Guiana since 1968

Guyafor is a network of permanent forest plots installed in French Guiana. The Guyafor Database compiles coordinates of the 11 sites (Paracou, Bafog, Organabo, Risquetout, Montagne Tortue, Saut Lavilette, Acarouany (Javouhey), Montagne Plomb, Tibourou, Nouragues, Laussat) and their subdivisions of the guianese permanent plots network. Each site contains georeferenced trees, botanically identified and regularly measured (diameter) for varying periods, depending to the site. To have more informations about each site, please refer to the attached metadata sheets

Folha rasterizada à escala 1/50 000 da ilha Graciosa - Região Autónoma dos Açores (RAA)

Folha raster da ilha Graciosa, com planimetria e altimetria com intervalo de 100m entre as curvas mestras e de 25m entre as secundárias.

Planta Aerofotogramétrica 1:1000 de 1968 da Zona Central de Vale de Cambra

Planta Aerofotogramétrica à escala 1:1000 da Zona Central do Concelho de Vale de Cambra, composta por 19 plantas

Carte géologique 1/50 000, feuille de : FONTENAY-LE-COMTE