Scouting for land is often a multi-step process, with the type and amount of analysis done usually dependent upon the intended purpose. One of the key factors considered is typically location, with different players weighting things like the proximity to other mining deposits, commercial production facilities, and retail outlets based upon their ultimate objective. The grade of the terrain should be considered, as the construction of an outpost requires a fairly even surface. Weather can have a dramatic impact on the commercial viability of an area of land, as frequent sandstorms, electrical storms, high winds, snow, and other environmental factors can significantly impede the potential of an area. Security is a common consideration, as piracy and theft are always a financial drag on those seeking to earn a lawful living. For most, though, the primary determinant as to the value of a parcel of land is what it contains above and below the surface. Obtaining an accurate assessment to this effect may require a considerable investment in terms of both time and money, and may involve taking core samples and having them analyzed, performing seismographic surveys, and other such scientific and engineering challenges.