DiGMap-Plus provides a wide range of value-added geological data and information based on the digital 1:50 000 scale geological map — DiGMapGB-50.
The primary goal for the project is to provide key characteristics of the geology of Great Britain, such as engineering parameters, in a way that is suitable for rapid deployment by non-geologists.
Data will be provided as a series of attributes that will be available to licence individually or as a personally selected range of 'modules' to meet your own requirements. The data are normally supplied as a single GIS layer of 'surface geology' compiled from the combined bedrock and superficial layers of DiGMapGB-50.
The strength of geological materials is related to their composition, density, and how their mineral components are bound together, i.e. interlocking grains or cementation. This theme provides information on zones of rock strength (based on field description of materials) as part of a suite of GIS layers for different engineering parameters.
Excavatability is a measure of how easy it is to dig up and remove geological materials and is used to determine appropriate excavation methods. This theme provides information on zones of excavatability and the local factors controlling it for a range of excavating equipment.
Engineered fill is material that is used to fill in a depression or hole in the ground or artificially change the elevation of the ground level (e.g. embankments). This theme provides information on the suitability of excavated geological material to be used as engineering fill or other possible uses.
Resistivity is a geophysical property of rocks, deposits and soils. It is an important factor in how electrical currents move through the ground, affecting earthing of infrastructure and electro-chemical corrosion. This theme provides information on modelled ranges of resistivity of bedrock and superficial deposits.
Corrosion is the slow destruction of a solid material by means of a chemical reaction. The corrosivity dataset shows the potential corrosiveness of the ground to shallow-buried steel infrastructure at shallow depth.
Discontinuities are defined as any break or change in the continuity of a rock mass that has the potential to have a reduced strength. This theme provides information on the discontinuties in bedrock and superficial deposits as part of a suite of GIS layers for different engineering parameters.
Bulking is defined as the increase in volume of material when it is excavated from its in situ location. This theme provides information on the bulking factor of bedrock and superficial deposits as part of a suite of GIS layers for different engineering parameters.