map unit


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map unit

[′map ‚yü·nət]
(genetics)
A measure of genetic distance corresponding to a recombination frequency of 1% or 1 centriMorgan (cM).
References in periodicals archive ?
In contrast, the low-intensity surveys have relatively few soil components per map unit with large probabilities of occurrence, giving the impression the surveyor was more certain about soil distribution.
This was consistent with another study conducted in this field, where variability between rather than within soil map unit boundaries was greatest at this wavelength based ordinary-least-squares analyses (Mueller et al.
Map unit polygons provide the highest level of spatial detail and contain unmapped soil-landform relationships recorded as areal proportions.
However, no indication was provided on the map, or in the text, as the likely proportion of map unit components.
SSURGO consists of county-level maps, metadata, and tables, which define the proportionate extent of the component soils (phases) and their properties for each map unit.
A consociation map unit (Pil) which encompassed the maximum surface of the area was selected from the existing detailed soil map (Table 1).
Before GIS technology, slope information was attached to the soft map unit so that land use restrictions could be placed on certain soils.
Once a map unit was selected, a field within that unit was determined mainly by the willingness of a farm owner to allow sampling to take place.
A mouse click generates a map sheet image display that is annotated with soil map unit boundaries, water, and infrast ructure elements such as roads and railroads.
The soil map unit can be unsuitable for predicting values of individual soil properties (single factors) because the properties may have large variance (Webster 1977).
An extension to ArcView, it allows the user to create tabular reports or soil-based thematic maps and offers several map unit component processing methods.