How to calculate land areas for Soil Landscape of Canada components

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Overview

These instructions explain how to calculate the land area applicable to Soil Landscape components identified in the SLC Component Table

Instructions

The following sample datasets are used to illustrate this calculation.

Table 1: Component Table (CMP)
Polygon
(SL)
Component
(CMP)
Percent
Occurrence
(PERCENT)
Soil Development
(DEVEL)
...other
CMP attributes
1 1 40 Brown Solonetzic  
2 30 Brown Chernozemic
3 30 Brown Chernozemic

Table 2: Landscape Attribute Table (LAT)
Polygon (SL) polygon land area
LAND_AREA
(ha)
...other
LAT attributes
1 1,000  

Joining the LAT to the Component Table via the SL field results in the following:

Table 3: LAT joined to the Component Table
Polygon
(SL)
Component
(CMP)
Percent
Occurrence
(PERCENT)
Soil Development
(DEVEL)
...other
CMP attributes
polygon land area
LAND_AREA
(ha)
...other
LAT attributes
1 1 40 Brown Solonetzic   1,000  
2 30 Brown Chernozemic   1,000
3 30 Brown Chernozemic   1,000

The area of land occupied by each component can then be calculated with the formula

component land area = PERCENT x LAND_AREA / 100

Table 4: Land area for each component
Polygon
(SL)
Component
(CMP)
Percent
Occurrence
(PERCENT)
Soil Development
(DEVEL)
...other
CMP attributes
LAND_AREA
(ha)
...other
LAT attributes
component land area
(ha)
1 1 40 Brown Solonetzic   1,000   400
2 30 Brown Chernozemic   1,000   300
3 30 Brown Chernozemic   1,000   300

effective version 2.2